/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread-nondet/nondet-array-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 19:13:45,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 19:13:45,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 19:13:45,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 19:13:45,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 19:13:45,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 19:13:45,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 19:13:45,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 19:13:45,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 19:13:45,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 19:13:45,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 19:13:45,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 19:13:45,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 19:13:45,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 19:13:45,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 19:13:45,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 19:13:45,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 19:13:45,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 19:13:45,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 19:13:45,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 19:13:45,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 19:13:45,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 19:13:45,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 19:13:45,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 19:13:45,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 19:13:45,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 19:13:45,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 19:13:45,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 19:13:45,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 19:13:45,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 19:13:45,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 19:13:45,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 19:13:45,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 19:13:45,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 19:13:45,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 19:13:45,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 19:13:45,536 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 19:13:45,558 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 19:13:45,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 19:13:45,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 19:13:45,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 19:13:45,560 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 19:13:45,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 19:13:45,561 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 19:13:45,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 19:13:45,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 19:13:45,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 19:13:45,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 19:13:45,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 19:13:45,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 19:13:45,562 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 19:13:45,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 19:13:45,563 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 19:13:45,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 19:13:45,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 19:13:45,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 19:13:45,563 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 19:13:45,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 19:13:45,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 19:13:45,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 19:13:45,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 19:13:45,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 19:13:45,565 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 19:13:45,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 19:13:45,565 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 19:13:45,565 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 19:13:45,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 19:13:45,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 19:13:45,840 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 19:13:45,843 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 19:13:45,844 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 19:13:45,845 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 19:13:45,845 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-nondet/nondet-array-1.i [2020-10-09 19:13:45,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fcdaabce/b5c18e408c634df4999a1953562cf36b/FLAGc967b2143 [2020-10-09 19:13:46,414 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 19:13:46,415 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-nondet/nondet-array-1.i [2020-10-09 19:13:46,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fcdaabce/b5c18e408c634df4999a1953562cf36b/FLAGc967b2143 [2020-10-09 19:13:46,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fcdaabce/b5c18e408c634df4999a1953562cf36b [2020-10-09 19:13:46,707 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 19:13:46,709 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 19:13:46,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 19:13:46,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 19:13:46,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 19:13:46,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 07:13:46" (1/1) ... [2020-10-09 19:13:46,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1965a510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:13:46, skipping insertion in model container [2020-10-09 19:13:46,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 07:13:46" (1/1) ... [2020-10-09 19:13:46,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 19:13:46,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 19:13:47,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 19:13:47,265 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 19:13:47,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 19:13:47,374 INFO L208 MainTranslator]: Completed translation [2020-10-09 19:13:47,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:13:47 WrapperNode [2020-10-09 19:13:47,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 19:13:47,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 19:13:47,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 19:13:47,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 19:13:47,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:13:47" (1/1) ... [2020-10-09 19:13:47,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:13:47" (1/1) ... [2020-10-09 19:13:47,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 19:13:47,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 19:13:47,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 19:13:47,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 19:13:47,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:13:47" (1/1) ... [2020-10-09 19:13:47,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:13:47" (1/1) ... [2020-10-09 19:13:47,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:13:47" (1/1) ... [2020-10-09 19:13:47,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:13:47" (1/1) ... [2020-10-09 19:13:47,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:13:47" (1/1) ... [2020-10-09 19:13:47,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:13:47" (1/1) ... [2020-10-09 19:13:47,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:13:47" (1/1) ... [2020-10-09 19:13:47,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 19:13:47,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 19:13:47,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 19:13:47,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 19:13:47,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:13:47" (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 [2020-10-09 19:13:47,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-10-09 19:13:47,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 19:13:47,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 19:13:47,527 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2020-10-09 19:13:47,527 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2020-10-09 19:13:47,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 19:13:47,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 19:13:47,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 19:13:47,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 19:13:47,531 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 19:13:47,857 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 19:13:47,857 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-09 19:13:47,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 07:13:47 BoogieIcfgContainer [2020-10-09 19:13:47,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 19:13:47,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 19:13:47,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 19:13:47,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 19:13:47,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 07:13:46" (1/3) ... [2020-10-09 19:13:47,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736bd004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 07:13:47, skipping insertion in model container [2020-10-09 19:13:47,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:13:47" (2/3) ... [2020-10-09 19:13:47,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736bd004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 07:13:47, skipping insertion in model container [2020-10-09 19:13:47,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 07:13:47" (3/3) ... [2020-10-09 19:13:47,865 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-array-1.i [2020-10-09 19:13:47,874 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 19:13:47,880 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 19:13:47,881 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 19:13:47,905 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:47,905 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:47,906 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:47,906 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:47,906 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:47,906 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:47,907 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:47,910 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:47,910 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:47,911 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:47,911 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:47,911 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:47,936 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 19:13:47,955 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:13:47,955 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:13:47,955 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:13:47,955 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:13:47,955 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:13:47,956 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:13:47,956 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:13:47,956 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:13:47,967 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 71 transitions, 150 flow [2020-10-09 19:13:48,018 INFO L129 PetriNetUnfolder]: 12/103 cut-off events. [2020-10-09 19:13:48,019 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 19:13:48,022 INFO L80 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 103 events. 12/103 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 206 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2020-10-09 19:13:48,023 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 71 transitions, 150 flow [2020-10-09 19:13:48,028 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 64 transitions, 136 flow [2020-10-09 19:13:48,049 INFO L129 PetriNetUnfolder]: 6/63 cut-off events. [2020-10-09 19:13:48,050 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 19:13:48,050 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:13:48,051 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:13:48,052 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:13:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:13:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash -820867433, now seen corresponding path program 1 times [2020-10-09 19:13:48,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:13:48,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505129029] [2020-10-09 19:13:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 19:13:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:13:48,163 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:13:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:13:48,186 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:13:48,222 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 19:13:48,222 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 19:13:48,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 19:13:48,436 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 19:13:48,436 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-09 19:13:48,445 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,445 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,445 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,446 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,446 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,446 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,447 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,447 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,447 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,448 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,448 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,448 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,448 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,449 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,449 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,450 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,450 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,450 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,450 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,452 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,453 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,453 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,453 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,453 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:48,457 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 19:13:48,458 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:13:48,458 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:13:48,458 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:13:48,458 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:13:48,458 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:13:48,459 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:13:48,459 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:13:48,459 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:13:48,462 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2020-10-09 19:13:48,503 INFO L129 PetriNetUnfolder]: 23/183 cut-off events. [2020-10-09 19:13:48,503 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-09 19:13:48,505 INFO L80 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 183 events. 23/183 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 454 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2020-10-09 19:13:48,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 78 transitions, 174 flow [2020-10-09 19:13:48,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 71 transitions, 160 flow [2020-10-09 19:13:48,525 INFO L129 PetriNetUnfolder]: 7/66 cut-off events. [2020-10-09 19:13:48,525 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 19:13:48,526 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:13:48,526 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:13:48,526 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:13:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:13:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1563104110, now seen corresponding path program 1 times [2020-10-09 19:13:48,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:13:48,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855615350] [2020-10-09 19:13:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 19:13:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:13:48,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 19:13:48,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:13:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:48,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:13:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:48,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855615350] [2020-10-09 19:13:48,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:13:48,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 19:13:48,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910727639] [2020-10-09 19:13:48,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 19:13:48,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:13:48,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 19:13:48,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 19:13:48,721 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 78 [2020-10-09 19:13:48,723 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 160 flow. Second operand 2 states. [2020-10-09 19:13:48,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:13:48,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 78 [2020-10-09 19:13:48,734 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:13:48,791 INFO L129 PetriNetUnfolder]: 7/143 cut-off events. [2020-10-09 19:13:48,792 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-09 19:13:48,794 INFO L80 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 143 events. 7/143 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 348 event pairs, 0 based on Foata normal form. 12/143 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2020-10-09 19:13:48,796 INFO L132 encePairwiseOnDemand]: 74/78 looper letters, 0 selfloop transitions, 0 changer transitions 1/67 dead transitions. [2020-10-09 19:13:48,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 152 flow [2020-10-09 19:13:48,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 19:13:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 19:13:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 150 transitions. [2020-10-09 19:13:48,815 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9615384615384616 [2020-10-09 19:13:48,816 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 150 transitions. [2020-10-09 19:13:48,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 150 transitions. [2020-10-09 19:13:48,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:13:48,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 150 transitions. [2020-10-09 19:13:48,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 19:13:48,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 19:13:48,854 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 19:13:48,856 INFO L185 Difference]: Start difference. First operand has 69 places, 71 transitions, 160 flow. Second operand 2 states and 150 transitions. [2020-10-09 19:13:48,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 152 flow [2020-10-09 19:13:48,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:13:48,883 INFO L241 Difference]: Finished difference. Result has 70 places, 66 transitions, 150 flow [2020-10-09 19:13:48,888 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=150, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2020-10-09 19:13:48,889 INFO L341 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2020-10-09 19:13:48,889 INFO L481 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 150 flow [2020-10-09 19:13:48,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 19:13:48,889 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:13:48,889 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:13:49,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 19:13:49,108 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:13:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:13:49,111 INFO L82 PathProgramCache]: Analyzing trace with hash -843913485, now seen corresponding path program 1 times [2020-10-09 19:13:49,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:13:49,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358480486] [2020-10-09 19:13:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 19:13:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:13:49,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 19:13:49,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:13:49,275 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:13:49,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:13:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:49,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:13:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:49,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358480486] [2020-10-09 19:13:49,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:13:49,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-09 19:13:49,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608165662] [2020-10-09 19:13:49,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 19:13:49,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:13:49,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 19:13:49,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-09 19:13:50,325 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 78 [2020-10-09 19:13:50,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 150 flow. Second operand 10 states. [2020-10-09 19:13:50,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:13:50,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 78 [2020-10-09 19:13:50,326 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:13:50,535 INFO L129 PetriNetUnfolder]: 5/148 cut-off events. [2020-10-09 19:13:50,535 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-10-09 19:13:50,536 INFO L80 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 148 events. 5/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 317 event pairs, 1 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 207. Up to 21 conditions per place. [2020-10-09 19:13:50,537 INFO L132 encePairwiseOnDemand]: 63/78 looper letters, 10 selfloop transitions, 15 changer transitions 0/72 dead transitions. [2020-10-09 19:13:50,537 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 212 flow [2020-10-09 19:13:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 19:13:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 19:13:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 399 transitions. [2020-10-09 19:13:50,542 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7307692307692307 [2020-10-09 19:13:50,542 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 399 transitions. [2020-10-09 19:13:50,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 399 transitions. [2020-10-09 19:13:50,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:13:50,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 399 transitions. [2020-10-09 19:13:50,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 19:13:50,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 19:13:50,549 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 19:13:50,549 INFO L185 Difference]: Start difference. First operand has 70 places, 66 transitions, 150 flow. Second operand 7 states and 399 transitions. [2020-10-09 19:13:50,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 212 flow [2020-10-09 19:13:50,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 72 transitions, 212 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:13:50,553 INFO L241 Difference]: Finished difference. Result has 77 places, 72 transitions, 223 flow [2020-10-09 19:13:50,554 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=223, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2020-10-09 19:13:50,554 INFO L341 CegarLoopForPetriNet]: 69 programPoint places, 8 predicate places. [2020-10-09 19:13:50,555 INFO L481 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 223 flow [2020-10-09 19:13:50,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 19:13:50,555 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:13:50,555 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:13:50,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 19:13:50,770 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:13:50,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:13:50,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1947211095, now seen corresponding path program 1 times [2020-10-09 19:13:50,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:13:50,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613167649] [2020-10-09 19:13:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-09 19:13:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:13:50,818 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:13:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:13:50,835 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:13:50,855 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 19:13:50,856 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 19:13:51,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 19:13:51,057 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 19:13:51,058 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-09 19:13:51,066 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,066 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,066 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,066 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,067 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,067 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,067 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,068 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,068 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,068 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,068 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,068 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,069 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,069 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,069 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,069 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,069 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,069 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,070 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,070 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,070 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,071 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,071 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,071 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,071 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,071 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,073 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,073 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,073 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,073 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,073 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,074 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,075 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,075 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,075 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,075 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:51,078 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 19:13:51,078 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:13:51,078 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:13:51,078 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:13:51,079 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:13:51,079 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:13:51,079 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:13:51,079 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:13:51,079 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:13:51,081 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 200 flow [2020-10-09 19:13:51,111 INFO L129 PetriNetUnfolder]: 45/330 cut-off events. [2020-10-09 19:13:51,112 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-09 19:13:51,113 INFO L80 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 330 events. 45/330 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1103 event pairs, 1 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 191. Up to 16 conditions per place. [2020-10-09 19:13:51,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 85 transitions, 200 flow [2020-10-09 19:13:51,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 78 transitions, 186 flow [2020-10-09 19:13:51,121 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-10-09 19:13:51,121 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 19:13:51,121 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:13:51,121 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:13:51,121 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:13:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:13:51,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2023565678, now seen corresponding path program 1 times [2020-10-09 19:13:51,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:13:51,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256666703] [2020-10-09 19:13:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-09 19:13:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:13:51,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 19:13:51,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:13:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:51,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:13:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:51,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256666703] [2020-10-09 19:13:51,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:13:51,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 19:13:51,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352465554] [2020-10-09 19:13:51,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 19:13:51,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:13:51,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 19:13:51,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 19:13:51,183 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 85 [2020-10-09 19:13:51,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 186 flow. Second operand 2 states. [2020-10-09 19:13:51,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:13:51,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 85 [2020-10-09 19:13:51,183 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:13:51,213 INFO L129 PetriNetUnfolder]: 16/253 cut-off events. [2020-10-09 19:13:51,213 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-09 19:13:51,214 INFO L80 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 253 events. 16/253 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 784 event pairs, 1 based on Foata normal form. 21/253 useless extension candidates. Maximal degree in co-relation 277. Up to 16 conditions per place. [2020-10-09 19:13:51,215 INFO L132 encePairwiseOnDemand]: 81/85 looper letters, 0 selfloop transitions, 0 changer transitions 1/74 dead transitions. [2020-10-09 19:13:51,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 178 flow [2020-10-09 19:13:51,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 19:13:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 19:13:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 164 transitions. [2020-10-09 19:13:51,216 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9647058823529412 [2020-10-09 19:13:51,216 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 164 transitions. [2020-10-09 19:13:51,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 164 transitions. [2020-10-09 19:13:51,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:13:51,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 164 transitions. [2020-10-09 19:13:51,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 19:13:51,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 19:13:51,219 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 19:13:51,219 INFO L185 Difference]: Start difference. First operand has 77 places, 78 transitions, 186 flow. Second operand 2 states and 164 transitions. [2020-10-09 19:13:51,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 178 flow [2020-10-09 19:13:51,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 74 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:13:51,222 INFO L241 Difference]: Finished difference. Result has 78 places, 73 transitions, 176 flow [2020-10-09 19:13:51,222 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=176, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2020-10-09 19:13:51,222 INFO L341 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2020-10-09 19:13:51,222 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 176 flow [2020-10-09 19:13:51,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 19:13:51,223 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:13:51,223 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:13:51,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 19:13:51,434 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:13:51,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:13:51,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1304375053, now seen corresponding path program 1 times [2020-10-09 19:13:51,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:13:51,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327800388] [2020-10-09 19:13:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-09 19:13:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:13:51,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 19:13:51,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:13:51,522 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:13:51,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:13:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:51,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:13:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:51,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327800388] [2020-10-09 19:13:51,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:13:51,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-09 19:13:51,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089002333] [2020-10-09 19:13:51,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 19:13:51,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:13:51,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 19:13:51,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-09 19:13:52,419 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 85 [2020-10-09 19:13:52,420 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 176 flow. Second operand 10 states. [2020-10-09 19:13:52,420 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:13:52,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 85 [2020-10-09 19:13:52,421 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:13:52,648 INFO L129 PetriNetUnfolder]: 15/292 cut-off events. [2020-10-09 19:13:52,648 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2020-10-09 19:13:52,649 INFO L80 FinitePrefix]: Finished finitePrefix Result has 415 conditions, 292 events. 15/292 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1085 event pairs, 4 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 409. Up to 45 conditions per place. [2020-10-09 19:13:52,651 INFO L132 encePairwiseOnDemand]: 70/85 looper letters, 10 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2020-10-09 19:13:52,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 238 flow [2020-10-09 19:13:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 19:13:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 19:13:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 448 transitions. [2020-10-09 19:13:52,654 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7529411764705882 [2020-10-09 19:13:52,654 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 448 transitions. [2020-10-09 19:13:52,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 448 transitions. [2020-10-09 19:13:52,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:13:52,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 448 transitions. [2020-10-09 19:13:52,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 19:13:52,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 19:13:52,659 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 19:13:52,659 INFO L185 Difference]: Start difference. First operand has 78 places, 73 transitions, 176 flow. Second operand 7 states and 448 transitions. [2020-10-09 19:13:52,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 238 flow [2020-10-09 19:13:52,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 79 transitions, 238 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:13:52,663 INFO L241 Difference]: Finished difference. Result has 85 places, 79 transitions, 249 flow [2020-10-09 19:13:52,663 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=249, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2020-10-09 19:13:52,664 INFO L341 CegarLoopForPetriNet]: 77 programPoint places, 8 predicate places. [2020-10-09 19:13:52,664 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 249 flow [2020-10-09 19:13:52,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 19:13:52,664 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:13:52,664 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:13:52,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 19:13:52,878 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:13:52,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:13:52,879 INFO L82 PathProgramCache]: Analyzing trace with hash -720133895, now seen corresponding path program 1 times [2020-10-09 19:13:52,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:13:52,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126243479] [2020-10-09 19:13:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-09 19:13:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:13:52,933 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:13:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:13:52,953 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:13:52,975 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 19:13:52,975 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 19:13:53,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-09 19:13:53,176 WARN L371 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 19:13:53,176 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-09 19:13:53,186 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,186 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,186 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,186 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,187 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,187 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,187 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,187 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,187 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,188 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,188 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,188 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,188 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,188 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,188 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,188 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,189 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,189 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,189 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,189 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,189 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,189 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,190 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,190 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,190 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,190 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,190 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,190 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,191 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,191 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,191 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,191 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,191 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,193 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,193 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,193 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,193 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,193 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,195 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,195 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,195 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,195 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,195 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,196 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,197 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,197 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,197 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,197 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:53,202 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 19:13:53,202 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:13:53,202 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:13:53,202 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:13:53,202 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:13:53,202 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:13:53,203 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:13:53,203 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:13:53,203 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:13:53,204 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 228 flow [2020-10-09 19:13:53,269 INFO L129 PetriNetUnfolder]: 91/613 cut-off events. [2020-10-09 19:13:53,270 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-09 19:13:53,273 INFO L80 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 613 events. 91/613 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2726 event pairs, 6 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 350. Up to 32 conditions per place. [2020-10-09 19:13:53,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 92 transitions, 228 flow [2020-10-09 19:13:53,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 85 transitions, 214 flow [2020-10-09 19:13:53,284 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-10-09 19:13:53,285 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 19:13:53,285 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:13:53,285 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:13:53,285 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:13:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:13:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash -702902638, now seen corresponding path program 1 times [2020-10-09 19:13:53,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:13:53,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93580737] [2020-10-09 19:13:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-09 19:13:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:13:53,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 19:13:53,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:13:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:53,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:13:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:53,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93580737] [2020-10-09 19:13:53,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:13:53,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 19:13:53,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213564483] [2020-10-09 19:13:53,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 19:13:53,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:13:53,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 19:13:53,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 19:13:53,378 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 92 [2020-10-09 19:13:53,378 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 214 flow. Second operand 2 states. [2020-10-09 19:13:53,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:13:53,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 92 [2020-10-09 19:13:53,379 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:13:53,430 INFO L129 PetriNetUnfolder]: 37/463 cut-off events. [2020-10-09 19:13:53,431 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-09 19:13:53,432 INFO L80 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 463 events. 37/463 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1980 event pairs, 6 based on Foata normal form. 38/463 useless extension candidates. Maximal degree in co-relation 513. Up to 32 conditions per place. [2020-10-09 19:13:53,434 INFO L132 encePairwiseOnDemand]: 88/92 looper letters, 0 selfloop transitions, 0 changer transitions 1/81 dead transitions. [2020-10-09 19:13:53,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 81 transitions, 206 flow [2020-10-09 19:13:53,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 19:13:53,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 19:13:53,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 178 transitions. [2020-10-09 19:13:53,436 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.967391304347826 [2020-10-09 19:13:53,436 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 178 transitions. [2020-10-09 19:13:53,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 178 transitions. [2020-10-09 19:13:53,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:13:53,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 178 transitions. [2020-10-09 19:13:53,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 19:13:53,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 19:13:53,438 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 19:13:53,438 INFO L185 Difference]: Start difference. First operand has 85 places, 85 transitions, 214 flow. Second operand 2 states and 178 transitions. [2020-10-09 19:13:53,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 81 transitions, 206 flow [2020-10-09 19:13:53,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 81 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:13:53,441 INFO L241 Difference]: Finished difference. Result has 86 places, 80 transitions, 204 flow [2020-10-09 19:13:53,442 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2020-10-09 19:13:53,442 INFO L341 CegarLoopForPetriNet]: 85 programPoint places, 1 predicate places. [2020-10-09 19:13:53,442 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 204 flow [2020-10-09 19:13:53,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 19:13:53,442 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:13:53,442 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:13:53,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-09 19:13:53,652 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:13:53,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:13:53,653 INFO L82 PathProgramCache]: Analyzing trace with hash 16287987, now seen corresponding path program 1 times [2020-10-09 19:13:53,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:13:53,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877664179] [2020-10-09 19:13:53,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-10-09 19:13:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:13:53,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 19:13:53,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:13:53,745 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:13:53,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:13:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:53,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:13:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:53,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877664179] [2020-10-09 19:13:53,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:13:53,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-09 19:13:53,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531305389] [2020-10-09 19:13:53,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 19:13:53,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:13:53,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 19:13:53,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-09 19:13:54,695 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 92 [2020-10-09 19:13:54,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 204 flow. Second operand 10 states. [2020-10-09 19:13:54,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:13:54,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 92 [2020-10-09 19:13:54,696 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:13:54,954 INFO L129 PetriNetUnfolder]: 38/564 cut-off events. [2020-10-09 19:13:54,954 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2020-10-09 19:13:54,956 INFO L80 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 564 events. 38/564 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2885 event pairs, 12 based on Foata normal form. 0/530 useless extension candidates. Maximal degree in co-relation 790. Up to 90 conditions per place. [2020-10-09 19:13:54,959 INFO L132 encePairwiseOnDemand]: 77/92 looper letters, 10 selfloop transitions, 15 changer transitions 0/86 dead transitions. [2020-10-09 19:13:54,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 86 transitions, 266 flow [2020-10-09 19:13:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 19:13:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 19:13:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 497 transitions. [2020-10-09 19:13:54,962 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7717391304347826 [2020-10-09 19:13:54,962 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 497 transitions. [2020-10-09 19:13:54,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 497 transitions. [2020-10-09 19:13:54,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:13:54,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 497 transitions. [2020-10-09 19:13:54,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 19:13:54,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 19:13:54,966 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 19:13:54,966 INFO L185 Difference]: Start difference. First operand has 86 places, 80 transitions, 204 flow. Second operand 7 states and 497 transitions. [2020-10-09 19:13:54,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 86 transitions, 266 flow [2020-10-09 19:13:54,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 86 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:13:54,972 INFO L241 Difference]: Finished difference. Result has 93 places, 86 transitions, 277 flow [2020-10-09 19:13:54,972 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=277, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2020-10-09 19:13:54,973 INFO L341 CegarLoopForPetriNet]: 85 programPoint places, 8 predicate places. [2020-10-09 19:13:54,973 INFO L481 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 277 flow [2020-10-09 19:13:54,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 19:13:54,973 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:13:54,973 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:13:55,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-10-09 19:13:55,187 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:13:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:13:55,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1051494560, now seen corresponding path program 1 times [2020-10-09 19:13:55,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:13:55,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191189107] [2020-10-09 19:13:55,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-10-09 19:13:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:13:55,245 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:13:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:13:55,265 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:13:55,287 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 19:13:55,287 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 19:13:55,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-10-09 19:13:55,488 WARN L371 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 19:13:55,489 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-10-09 19:13:55,498 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,498 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,498 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,498 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,498 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,499 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,499 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,499 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,499 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,499 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,499 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,500 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,500 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,500 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,500 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,501 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,501 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,501 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,501 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,501 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,501 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,502 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,502 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,502 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,502 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,502 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,502 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,503 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,503 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,503 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,503 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,503 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,503 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,504 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,504 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,504 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,504 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,504 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,505 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,505 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,506 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,506 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,506 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,506 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,507 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,508 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,508 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,508 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,508 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,508 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,509 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,510 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,510 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,510 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,510 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,511 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,511 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,511 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,512 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,512 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:13:55,516 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 19:13:55,516 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:13:55,516 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:13:55,516 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:13:55,517 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:13:55,517 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:13:55,517 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:13:55,517 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:13:55,517 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:13:55,518 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 258 flow [2020-10-09 19:13:55,622 INFO L129 PetriNetUnfolder]: 189/1172 cut-off events. [2020-10-09 19:13:55,622 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-09 19:13:55,626 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 1172 events. 189/1172 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6716 event pairs, 23 based on Foata normal form. 0/967 useless extension candidates. Maximal degree in co-relation 658. Up to 80 conditions per place. [2020-10-09 19:13:55,627 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 99 transitions, 258 flow [2020-10-09 19:13:55,631 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 92 transitions, 244 flow [2020-10-09 19:13:55,637 INFO L129 PetriNetUnfolder]: 7/66 cut-off events. [2020-10-09 19:13:55,638 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 19:13:55,638 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:13:55,638 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:13:55,639 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:13:55,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:13:55,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1896082286, now seen corresponding path program 1 times [2020-10-09 19:13:55,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:13:55,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064231575] [2020-10-09 19:13:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-10-09 19:13:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:13:55,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 19:13:55,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:13:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:55,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:13:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:55,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064231575] [2020-10-09 19:13:55,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:13:55,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 19:13:55,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218549729] [2020-10-09 19:13:55,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 19:13:55,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:13:55,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 19:13:55,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 19:13:55,719 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 99 [2020-10-09 19:13:55,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 92 transitions, 244 flow. Second operand 2 states. [2020-10-09 19:13:55,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:13:55,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 99 [2020-10-09 19:13:55,720 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:13:55,832 INFO L129 PetriNetUnfolder]: 86/877 cut-off events. [2020-10-09 19:13:55,832 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-09 19:13:55,835 INFO L80 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 877 events. 86/877 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4900 event pairs, 23 based on Foata normal form. 71/877 useless extension candidates. Maximal degree in co-relation 982. Up to 80 conditions per place. [2020-10-09 19:13:55,838 INFO L132 encePairwiseOnDemand]: 95/99 looper letters, 0 selfloop transitions, 0 changer transitions 1/88 dead transitions. [2020-10-09 19:13:55,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 88 transitions, 236 flow [2020-10-09 19:13:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 19:13:55,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 19:13:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 192 transitions. [2020-10-09 19:13:55,839 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9696969696969697 [2020-10-09 19:13:55,839 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 192 transitions. [2020-10-09 19:13:55,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 192 transitions. [2020-10-09 19:13:55,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:13:55,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 192 transitions. [2020-10-09 19:13:55,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 19:13:55,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 19:13:55,841 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 19:13:55,841 INFO L185 Difference]: Start difference. First operand has 93 places, 92 transitions, 244 flow. Second operand 2 states and 192 transitions. [2020-10-09 19:13:55,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 88 transitions, 236 flow [2020-10-09 19:13:55,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 88 transitions, 236 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:13:55,844 INFO L241 Difference]: Finished difference. Result has 94 places, 87 transitions, 234 flow [2020-10-09 19:13:55,844 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=234, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2020-10-09 19:13:55,845 INFO L341 CegarLoopForPetriNet]: 93 programPoint places, 1 predicate places. [2020-10-09 19:13:55,845 INFO L481 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 234 flow [2020-10-09 19:13:55,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 19:13:55,845 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:13:55,845 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:13:56,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-10-09 19:13:56,060 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:13:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:13:56,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1176891661, now seen corresponding path program 1 times [2020-10-09 19:13:56,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:13:56,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670159338] [2020-10-09 19:13:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-10-09 19:13:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:13:56,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 19:13:56,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:13:56,149 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:13:56,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:13:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:56,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:13:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:13:56,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670159338] [2020-10-09 19:13:56,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:13:56,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-09 19:13:56,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512394653] [2020-10-09 19:13:56,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 19:13:56,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:13:56,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 19:13:56,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-09 19:13:56,990 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 99 [2020-10-09 19:13:56,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 234 flow. Second operand 10 states. [2020-10-09 19:13:56,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:13:56,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 99 [2020-10-09 19:13:56,992 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:13:57,295 INFO L129 PetriNetUnfolder]: 90/1092 cut-off events. [2020-10-09 19:13:57,296 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2020-10-09 19:13:57,299 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 1092 events. 90/1092 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 7043 event pairs, 33 based on Foata normal form. 0/1025 useless extension candidates. Maximal degree in co-relation 1530. Up to 176 conditions per place. [2020-10-09 19:13:57,303 INFO L132 encePairwiseOnDemand]: 84/99 looper letters, 10 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2020-10-09 19:13:57,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 93 transitions, 296 flow [2020-10-09 19:13:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 19:13:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 19:13:57,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 546 transitions. [2020-10-09 19:13:57,305 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2020-10-09 19:13:57,306 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 546 transitions. [2020-10-09 19:13:57,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 546 transitions. [2020-10-09 19:13:57,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:13:57,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 546 transitions. [2020-10-09 19:13:57,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 19:13:57,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 19:13:57,309 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 19:13:57,309 INFO L185 Difference]: Start difference. First operand has 94 places, 87 transitions, 234 flow. Second operand 7 states and 546 transitions. [2020-10-09 19:13:57,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 93 transitions, 296 flow [2020-10-09 19:13:57,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 93 transitions, 296 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:13:57,313 INFO L241 Difference]: Finished difference. Result has 101 places, 93 transitions, 307 flow [2020-10-09 19:13:57,313 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=101, PETRI_TRANSITIONS=93} [2020-10-09 19:13:57,313 INFO L341 CegarLoopForPetriNet]: 93 programPoint places, 8 predicate places. [2020-10-09 19:13:57,313 INFO L481 AbstractCegarLoop]: Abstraction has has 101 places, 93 transitions, 307 flow [2020-10-09 19:13:57,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 19:13:57,314 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:13:57,314 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:13:57,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-10-09 19:13:57,533 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:13:57,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:13:57,534 INFO L82 PathProgramCache]: Analyzing trace with hash 132714350, now seen corresponding path program 1 times [2020-10-09 19:13:57,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:13:57,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468806312] [2020-10-09 19:13:57,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-10-09 19:13:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:13:57,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:13:57,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:13:57,627 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:13:57,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:13:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:13:57,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:13:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:13:57,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468806312] [2020-10-09 19:13:57,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [18407755] [2020-10-09 19:13:57,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:13:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:13:57,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:13:57,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:13:57,893 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:13:57,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:13:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:13:57,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:13:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:13:57,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247252977] [2020-10-09 19:13:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:13:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:13:58,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:13:58,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:13:58,022 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:13:58,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:13:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:13:58,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:13:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:13:58,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:13:58,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 16 [2020-10-09 19:13:58,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563175696] [2020-10-09 19:13:58,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 19:13:58,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:13:58,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 19:13:58,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-09 19:13:59,619 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 99 [2020-10-09 19:13:59,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 93 transitions, 307 flow. Second operand 16 states. [2020-10-09 19:13:59,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:13:59,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 99 [2020-10-09 19:13:59,621 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:00,451 INFO L129 PetriNetUnfolder]: 87/1351 cut-off events. [2020-10-09 19:14:00,451 INFO L130 PetriNetUnfolder]: For 485/485 co-relation queries the response was YES. [2020-10-09 19:14:00,456 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2688 conditions, 1351 events. 87/1351 cut-off events. For 485/485 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 9465 event pairs, 34 based on Foata normal form. 64/1415 useless extension candidates. Maximal degree in co-relation 2677. Up to 200 conditions per place. [2020-10-09 19:14:00,462 INFO L132 encePairwiseOnDemand]: 81/99 looper letters, 18 selfloop transitions, 25 changer transitions 0/107 dead transitions. [2020-10-09 19:14:00,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 107 transitions, 439 flow [2020-10-09 19:14:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 19:14:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-09 19:14:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1167 transitions. [2020-10-09 19:14:00,467 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7367424242424242 [2020-10-09 19:14:00,467 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1167 transitions. [2020-10-09 19:14:00,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1167 transitions. [2020-10-09 19:14:00,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:00,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1167 transitions. [2020-10-09 19:14:00,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-09 19:14:00,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-09 19:14:00,475 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-09 19:14:00,475 INFO L185 Difference]: Start difference. First operand has 101 places, 93 transitions, 307 flow. Second operand 16 states and 1167 transitions. [2020-10-09 19:14:00,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 107 transitions, 439 flow [2020-10-09 19:14:00,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 107 transitions, 434 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 19:14:00,480 INFO L241 Difference]: Finished difference. Result has 116 places, 105 transitions, 431 flow [2020-10-09 19:14:00,480 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=431, PETRI_PLACES=116, PETRI_TRANSITIONS=105} [2020-10-09 19:14:00,480 INFO L341 CegarLoopForPetriNet]: 93 programPoint places, 23 predicate places. [2020-10-09 19:14:00,480 INFO L481 AbstractCegarLoop]: Abstraction has has 116 places, 105 transitions, 431 flow [2020-10-09 19:14:00,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 19:14:00,480 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:00,481 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:01,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 mathsat -unsat_core_generation=3,15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:14:01,097 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:01,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:01,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1760542263, now seen corresponding path program 1 times [2020-10-09 19:14:01,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:01,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808522307] [2020-10-09 19:14:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:14:01,166 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:14:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:14:01,189 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:14:01,225 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 19:14:01,226 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 19:14:01,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3 [2020-10-09 19:14:01,426 WARN L371 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 19:14:01,427 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-10-09 19:14:01,436 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,437 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,437 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,437 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,437 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,437 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,437 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,437 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,437 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,438 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,438 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,438 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,438 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,438 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,438 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,438 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,438 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,438 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,438 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,439 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,439 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,439 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,439 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,439 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,439 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,439 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,439 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,439 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,439 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,439 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,440 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,440 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,440 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,440 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,440 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,440 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,440 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,440 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,441 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,441 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,441 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,441 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,441 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,442 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,442 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,442 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,442 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,443 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,443 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,443 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,444 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,444 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,445 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,445 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,445 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,445 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,445 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,446 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,446 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,446 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,447 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,447 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,448 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,448 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,448 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,448 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,448 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,449 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,449 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,449 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,450 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,450 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:01,455 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 19:14:01,455 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:14:01,455 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:14:01,455 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:14:01,455 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:14:01,455 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:14:01,455 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:14:01,456 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:14:01,456 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:14:01,457 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 106 transitions, 290 flow [2020-10-09 19:14:01,670 INFO L129 PetriNetUnfolder]: 399/2291 cut-off events. [2020-10-09 19:14:01,670 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-09 19:14:01,676 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 2291 events. 399/2291 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 16219 event pairs, 72 based on Foata normal form. 0/1892 useless extension candidates. Maximal degree in co-relation 1271. Up to 192 conditions per place. [2020-10-09 19:14:01,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 106 transitions, 290 flow [2020-10-09 19:14:01,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 99 transitions, 276 flow [2020-10-09 19:14:01,687 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-10-09 19:14:01,688 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 19:14:01,688 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:01,688 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:01,688 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:01,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:01,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1308137326, now seen corresponding path program 1 times [2020-10-09 19:14:01,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:01,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116058697] [2020-10-09 19:14:01,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:01,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 19:14:01,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:01,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:01,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116058697] [2020-10-09 19:14:01,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:14:01,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 19:14:01,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070340207] [2020-10-09 19:14:01,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 19:14:01,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:01,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 19:14:01,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 19:14:01,756 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 106 [2020-10-09 19:14:01,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 99 transitions, 276 flow. Second operand 2 states. [2020-10-09 19:14:01,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:01,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 106 [2020-10-09 19:14:01,756 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:01,924 INFO L129 PetriNetUnfolder]: 199/1707 cut-off events. [2020-10-09 19:14:01,924 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-09 19:14:01,931 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 1707 events. 199/1707 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 11947 event pairs, 72 based on Foata normal form. 136/1707 useless extension candidates. Maximal degree in co-relation 1932. Up to 192 conditions per place. [2020-10-09 19:14:01,938 INFO L132 encePairwiseOnDemand]: 102/106 looper letters, 0 selfloop transitions, 0 changer transitions 1/95 dead transitions. [2020-10-09 19:14:01,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 95 transitions, 268 flow [2020-10-09 19:14:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 19:14:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 19:14:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 206 transitions. [2020-10-09 19:14:01,939 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9716981132075472 [2020-10-09 19:14:01,939 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 206 transitions. [2020-10-09 19:14:01,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 206 transitions. [2020-10-09 19:14:01,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:01,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 206 transitions. [2020-10-09 19:14:01,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 19:14:01,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 19:14:01,941 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 19:14:01,941 INFO L185 Difference]: Start difference. First operand has 101 places, 99 transitions, 276 flow. Second operand 2 states and 206 transitions. [2020-10-09 19:14:01,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 95 transitions, 268 flow [2020-10-09 19:14:01,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 95 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:14:01,944 INFO L241 Difference]: Finished difference. Result has 102 places, 94 transitions, 266 flow [2020-10-09 19:14:01,944 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=266, PETRI_PLACES=102, PETRI_TRANSITIONS=94} [2020-10-09 19:14:01,944 INFO L341 CegarLoopForPetriNet]: 101 programPoint places, 1 predicate places. [2020-10-09 19:14:01,944 INFO L481 AbstractCegarLoop]: Abstraction has has 102 places, 94 transitions, 266 flow [2020-10-09 19:14:01,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 19:14:01,945 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:01,945 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:02,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3 [2020-10-09 19:14:02,156 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:02,157 INFO L82 PathProgramCache]: Analyzing trace with hash -588946701, now seen corresponding path program 1 times [2020-10-09 19:14:02,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:02,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469352646] [2020-10-09 19:14:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:02,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 19:14:02,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:02,242 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:02,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:02,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:02,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469352646] [2020-10-09 19:14:02,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:14:02,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-09 19:14:02,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456725919] [2020-10-09 19:14:02,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 19:14:02,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:02,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 19:14:02,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-09 19:14:03,183 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 106 [2020-10-09 19:14:03,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 94 transitions, 266 flow. Second operand 10 states. [2020-10-09 19:14:03,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:03,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 106 [2020-10-09 19:14:03,184 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:03,573 INFO L129 PetriNetUnfolder]: 207/2136 cut-off events. [2020-10-09 19:14:03,573 INFO L130 PetriNetUnfolder]: For 257/257 co-relation queries the response was YES. [2020-10-09 19:14:03,579 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3006 conditions, 2136 events. 207/2136 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 16756 event pairs, 87 based on Foata normal form. 0/2004 useless extension candidates. Maximal degree in co-relation 2997. Up to 343 conditions per place. [2020-10-09 19:14:03,586 INFO L132 encePairwiseOnDemand]: 91/106 looper letters, 10 selfloop transitions, 15 changer transitions 0/100 dead transitions. [2020-10-09 19:14:03,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 100 transitions, 328 flow [2020-10-09 19:14:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 19:14:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 19:14:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 595 transitions. [2020-10-09 19:14:03,589 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8018867924528302 [2020-10-09 19:14:03,589 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 595 transitions. [2020-10-09 19:14:03,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 595 transitions. [2020-10-09 19:14:03,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:03,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 595 transitions. [2020-10-09 19:14:03,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 19:14:03,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 19:14:03,593 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 19:14:03,593 INFO L185 Difference]: Start difference. First operand has 102 places, 94 transitions, 266 flow. Second operand 7 states and 595 transitions. [2020-10-09 19:14:03,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 100 transitions, 328 flow [2020-10-09 19:14:03,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 100 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:14:03,596 INFO L241 Difference]: Finished difference. Result has 109 places, 100 transitions, 339 flow [2020-10-09 19:14:03,596 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2020-10-09 19:14:03,596 INFO L341 CegarLoopForPetriNet]: 101 programPoint places, 8 predicate places. [2020-10-09 19:14:03,597 INFO L481 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 339 flow [2020-10-09 19:14:03,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 19:14:03,597 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:03,597 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:03,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3 [2020-10-09 19:14:03,806 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:03,806 INFO L82 PathProgramCache]: Analyzing trace with hash 635886218, now seen corresponding path program 1 times [2020-10-09 19:14:03,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:03,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566100439] [2020-10-09 19:14:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:03,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:03,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:03,898 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:03,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:03,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:04,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566100439] [2020-10-09 19:14:04,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1115521497] [2020-10-09 19:14:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:14:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:04,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:04,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:04,149 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:04,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:04,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:04,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324922307] [2020-10-09 19:14:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:14:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:04,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:04,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:04,282 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:04,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:04,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:04,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:14:04,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 16 [2020-10-09 19:14:04,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194580406] [2020-10-09 19:14:04,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 19:14:04,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:04,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 19:14:04,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-09 19:14:05,443 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 106 [2020-10-09 19:14:05,444 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 339 flow. Second operand 16 states. [2020-10-09 19:14:05,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:05,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 106 [2020-10-09 19:14:05,444 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:06,353 INFO L129 PetriNetUnfolder]: 204/2683 cut-off events. [2020-10-09 19:14:06,353 INFO L130 PetriNetUnfolder]: For 990/990 co-relation queries the response was YES. [2020-10-09 19:14:06,358 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5328 conditions, 2683 events. 204/2683 cut-off events. For 990/990 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 22883 event pairs, 88 based on Foata normal form. 128/2811 useless extension candidates. Maximal degree in co-relation 5316. Up to 395 conditions per place. [2020-10-09 19:14:06,366 INFO L132 encePairwiseOnDemand]: 88/106 looper letters, 18 selfloop transitions, 25 changer transitions 0/114 dead transitions. [2020-10-09 19:14:06,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 471 flow [2020-10-09 19:14:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 19:14:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-09 19:14:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1279 transitions. [2020-10-09 19:14:06,370 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.754127358490566 [2020-10-09 19:14:06,370 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1279 transitions. [2020-10-09 19:14:06,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1279 transitions. [2020-10-09 19:14:06,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:06,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1279 transitions. [2020-10-09 19:14:06,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-09 19:14:06,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-09 19:14:06,377 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-09 19:14:06,378 INFO L185 Difference]: Start difference. First operand has 109 places, 100 transitions, 339 flow. Second operand 16 states and 1279 transitions. [2020-10-09 19:14:06,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 471 flow [2020-10-09 19:14:06,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 114 transitions, 466 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 19:14:06,383 INFO L241 Difference]: Finished difference. Result has 124 places, 112 transitions, 463 flow [2020-10-09 19:14:06,383 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=463, PETRI_PLACES=124, PETRI_TRANSITIONS=112} [2020-10-09 19:14:06,384 INFO L341 CegarLoopForPetriNet]: 101 programPoint places, 23 predicate places. [2020-10-09 19:14:06,384 INFO L481 AbstractCegarLoop]: Abstraction has has 124 places, 112 transitions, 463 flow [2020-10-09 19:14:06,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 19:14:06,384 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:06,384 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:06,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 mathsat -unsat_core_generation=3,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:14:06,995 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:06,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:06,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1784138455, now seen corresponding path program 1 times [2020-10-09 19:14:06,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:06,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789307584] [2020-10-09 19:14:06,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 23 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:14:07,057 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:14:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:14:07,078 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:14:07,100 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 19:14:07,100 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 19:14:07,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 mathsat -unsat_core_generation=3 [2020-10-09 19:14:07,306 WARN L371 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 19:14:07,306 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-10-09 19:14:07,320 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,320 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,320 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,320 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,320 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,320 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,320 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,321 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,321 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,321 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,321 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,321 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,321 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,321 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,321 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,321 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,321 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,321 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,322 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,322 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,322 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,322 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,322 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,322 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,322 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,322 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,322 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,322 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,323 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,323 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,323 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,323 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,323 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,323 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,324 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,324 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,324 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,324 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,324 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,324 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,324 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,325 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,325 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,325 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,325 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,325 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,325 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,325 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,326 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,326 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,326 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,326 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,326 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,326 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,327 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,328 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,328 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,328 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,328 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,329 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,329 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,329 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,329 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,330 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,331 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,331 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,331 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,331 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,331 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,332 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,332 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,332 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,332 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,333 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,334 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,334 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,334 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,334 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,334 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,335 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,335 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,335 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,335 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,336 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:07,340 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 19:14:07,341 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:14:07,341 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:14:07,341 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:14:07,341 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:14:07,341 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:14:07,341 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:14:07,341 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:14:07,341 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:14:07,343 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 115 places, 113 transitions, 324 flow [2020-10-09 19:14:07,637 INFO L129 PetriNetUnfolder]: 849/4546 cut-off events. [2020-10-09 19:14:07,638 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-09 19:14:07,651 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 4546 events. 849/4546 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 38654 event pairs, 201 based on Foata normal form. 0/3761 useless extension candidates. Maximal degree in co-relation 2509. Up to 448 conditions per place. [2020-10-09 19:14:07,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 113 transitions, 324 flow [2020-10-09 19:14:07,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 106 transitions, 310 flow [2020-10-09 19:14:07,667 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-10-09 19:14:07,667 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 19:14:07,667 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:07,668 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:07,668 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:07,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1089561393, now seen corresponding path program 1 times [2020-10-09 19:14:07,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:07,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450794635] [2020-10-09 19:14:07,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:07,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 19:14:07,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:07,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:07,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450794635] [2020-10-09 19:14:07,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:14:07,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 19:14:07,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188786728] [2020-10-09 19:14:07,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 19:14:07,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 19:14:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 19:14:07,733 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 113 [2020-10-09 19:14:07,733 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 310 flow. Second operand 2 states. [2020-10-09 19:14:07,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:07,734 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 113 [2020-10-09 19:14:07,734 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:07,983 INFO L129 PetriNetUnfolder]: 456/3385 cut-off events. [2020-10-09 19:14:07,984 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-09 19:14:07,994 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3884 conditions, 3385 events. 456/3385 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 28600 event pairs, 201 based on Foata normal form. 265/3385 useless extension candidates. Maximal degree in co-relation 3875. Up to 448 conditions per place. [2020-10-09 19:14:08,002 INFO L132 encePairwiseOnDemand]: 109/113 looper letters, 0 selfloop transitions, 0 changer transitions 1/102 dead transitions. [2020-10-09 19:14:08,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 102 transitions, 302 flow [2020-10-09 19:14:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 19:14:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 19:14:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 220 transitions. [2020-10-09 19:14:08,004 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9734513274336283 [2020-10-09 19:14:08,004 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 220 transitions. [2020-10-09 19:14:08,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 220 transitions. [2020-10-09 19:14:08,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:08,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 220 transitions. [2020-10-09 19:14:08,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 19:14:08,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 19:14:08,006 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 19:14:08,006 INFO L185 Difference]: Start difference. First operand has 109 places, 106 transitions, 310 flow. Second operand 2 states and 220 transitions. [2020-10-09 19:14:08,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 102 transitions, 302 flow [2020-10-09 19:14:08,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:14:08,009 INFO L241 Difference]: Finished difference. Result has 110 places, 101 transitions, 300 flow [2020-10-09 19:14:08,010 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=300, PETRI_PLACES=110, PETRI_TRANSITIONS=101} [2020-10-09 19:14:08,010 INFO L341 CegarLoopForPetriNet]: 109 programPoint places, 1 predicate places. [2020-10-09 19:14:08,010 INFO L481 AbstractCegarLoop]: Abstraction has has 110 places, 101 transitions, 300 flow [2020-10-09 19:14:08,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 19:14:08,010 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:08,010 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:08,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 mathsat -unsat_core_generation=3 [2020-10-09 19:14:08,221 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:08,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1780122867, now seen corresponding path program 1 times [2020-10-09 19:14:08,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:08,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324615266] [2020-10-09 19:14:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 25 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:08,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 19:14:08,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:08,312 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:08,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:08,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:08,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324615266] [2020-10-09 19:14:08,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:14:08,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-09 19:14:08,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275053709] [2020-10-09 19:14:08,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 19:14:08,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:08,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 19:14:08,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-09 19:14:09,136 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 113 [2020-10-09 19:14:09,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 101 transitions, 300 flow. Second operand 10 states. [2020-10-09 19:14:09,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:09,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 113 [2020-10-09 19:14:09,138 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:09,663 INFO L129 PetriNetUnfolder]: 469/4224 cut-off events. [2020-10-09 19:14:09,664 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2020-10-09 19:14:09,676 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5953 conditions, 4224 events. 469/4224 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 39167 event pairs, 222 based on Foata normal form. 0/3963 useless extension candidates. Maximal degree in co-relation 5943. Up to 671 conditions per place. [2020-10-09 19:14:09,687 INFO L132 encePairwiseOnDemand]: 98/113 looper letters, 10 selfloop transitions, 15 changer transitions 0/107 dead transitions. [2020-10-09 19:14:09,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 107 transitions, 362 flow [2020-10-09 19:14:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 19:14:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 19:14:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 644 transitions. [2020-10-09 19:14:09,689 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8141592920353983 [2020-10-09 19:14:09,690 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 644 transitions. [2020-10-09 19:14:09,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 644 transitions. [2020-10-09 19:14:09,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:09,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 644 transitions. [2020-10-09 19:14:09,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 19:14:09,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 19:14:09,693 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 19:14:09,693 INFO L185 Difference]: Start difference. First operand has 110 places, 101 transitions, 300 flow. Second operand 7 states and 644 transitions. [2020-10-09 19:14:09,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 107 transitions, 362 flow [2020-10-09 19:14:09,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 107 transitions, 362 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:14:09,697 INFO L241 Difference]: Finished difference. Result has 117 places, 107 transitions, 373 flow [2020-10-09 19:14:09,698 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=373, PETRI_PLACES=117, PETRI_TRANSITIONS=107} [2020-10-09 19:14:09,698 INFO L341 CegarLoopForPetriNet]: 109 programPoint places, 8 predicate places. [2020-10-09 19:14:09,698 INFO L481 AbstractCegarLoop]: Abstraction has has 117 places, 107 transitions, 373 flow [2020-10-09 19:14:09,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 19:14:09,698 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:09,699 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:09,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 mathsat -unsat_core_generation=3 [2020-10-09 19:14:09,909 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:09,910 INFO L82 PathProgramCache]: Analyzing trace with hash -722589889, now seen corresponding path program 1 times [2020-10-09 19:14:09,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:09,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592923717] [2020-10-09 19:14:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 26 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:09,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:09,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:10,005 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:10,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:10,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:10,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592923717] [2020-10-09 19:14:10,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [495834744] [2020-10-09 19:14:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 27 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:14:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:10,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:10,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:10,258 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:10,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:10,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:10,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576524546] [2020-10-09 19:14:10,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:14:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:10,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:10,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:10,378 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:10,378 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:10,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:10,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:14:10,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 16 [2020-10-09 19:14:10,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236495639] [2020-10-09 19:14:10,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 19:14:10,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:10,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 19:14:10,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-09 19:14:11,777 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 113 [2020-10-09 19:14:11,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 107 transitions, 373 flow. Second operand 16 states. [2020-10-09 19:14:11,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:11,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 113 [2020-10-09 19:14:11,778 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:13,024 INFO L129 PetriNetUnfolder]: 466/5347 cut-off events. [2020-10-09 19:14:13,024 INFO L130 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2020-10-09 19:14:13,039 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10601 conditions, 5347 events. 466/5347 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 53499 event pairs, 223 based on Foata normal form. 256/5603 useless extension candidates. Maximal degree in co-relation 10588. Up to 782 conditions per place. [2020-10-09 19:14:13,047 INFO L132 encePairwiseOnDemand]: 95/113 looper letters, 18 selfloop transitions, 25 changer transitions 0/121 dead transitions. [2020-10-09 19:14:13,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 121 transitions, 505 flow [2020-10-09 19:14:13,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 19:14:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-09 19:14:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1391 transitions. [2020-10-09 19:14:13,051 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.769358407079646 [2020-10-09 19:14:13,051 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1391 transitions. [2020-10-09 19:14:13,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1391 transitions. [2020-10-09 19:14:13,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:13,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1391 transitions. [2020-10-09 19:14:13,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-09 19:14:13,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-09 19:14:13,057 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-09 19:14:13,057 INFO L185 Difference]: Start difference. First operand has 117 places, 107 transitions, 373 flow. Second operand 16 states and 1391 transitions. [2020-10-09 19:14:13,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 121 transitions, 505 flow [2020-10-09 19:14:13,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 121 transitions, 500 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 19:14:13,065 INFO L241 Difference]: Finished difference. Result has 132 places, 119 transitions, 497 flow [2020-10-09 19:14:13,065 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=497, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2020-10-09 19:14:13,065 INFO L341 CegarLoopForPetriNet]: 109 programPoint places, 23 predicate places. [2020-10-09 19:14:13,066 INFO L481 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 497 flow [2020-10-09 19:14:13,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 19:14:13,066 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:13,066 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:13,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 cvc4 --incremental --print-success --lang smt --rewrite-divk,26 mathsat -unsat_core_generation=3 [2020-10-09 19:14:13,667 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:13,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:13,668 INFO L82 PathProgramCache]: Analyzing trace with hash -845994799, now seen corresponding path program 1 times [2020-10-09 19:14:13,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:13,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533223887] [2020-10-09 19:14:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 29 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:14:13,742 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:14:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:14:13,764 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:14:13,789 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 19:14:13,789 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 19:14:13,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 mathsat -unsat_core_generation=3 [2020-10-09 19:14:13,990 WARN L371 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 19:14:13,990 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2020-10-09 19:14:14,003 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,003 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,003 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,003 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,003 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,003 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,004 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,004 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,004 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,004 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,004 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,004 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,004 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,005 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,005 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,005 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,005 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,005 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,005 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,005 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,005 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,006 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,006 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,006 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,006 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,006 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,006 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,006 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,007 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,007 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,007 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,007 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,007 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,007 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,007 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,007 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,008 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,008 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,008 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,008 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,008 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,008 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,008 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,009 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,009 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,009 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,009 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,009 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,009 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,010 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,010 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,010 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,010 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,010 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,011 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,011 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,011 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,011 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,011 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,012 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,012 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,014 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,014 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,014 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,014 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,014 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,015 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,015 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,015 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,016 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,016 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,017 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,017 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,017 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,017 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,017 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,018 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,018 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,018 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,018 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,018 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,019 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,019 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,020 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,020 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,020 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,021 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,021 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,021 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,021 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,021 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,022 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,022 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,022 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,022 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,023 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:14,027 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 19:14:14,028 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:14:14,029 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:14:14,029 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:14:14,029 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:14:14,029 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:14:14,029 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:14:14,029 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:14:14,029 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:14:14,031 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 123 places, 120 transitions, 360 flow [2020-10-09 19:14:14,790 INFO L129 PetriNetUnfolder]: 1811/9105 cut-off events. [2020-10-09 19:14:14,791 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-09 19:14:14,817 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10190 conditions, 9105 events. 1811/9105 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 90019 event pairs, 522 based on Foata normal form. 0/7550 useless extension candidates. Maximal degree in co-relation 5028. Up to 1024 conditions per place. [2020-10-09 19:14:14,817 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 120 transitions, 360 flow [2020-10-09 19:14:14,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 113 transitions, 346 flow [2020-10-09 19:14:14,842 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-10-09 19:14:14,842 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 19:14:14,843 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:14,843 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:14,843 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:14,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:14,843 INFO L82 PathProgramCache]: Analyzing trace with hash 916159122, now seen corresponding path program 1 times [2020-10-09 19:14:14,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:14,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944551453] [2020-10-09 19:14:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 30 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:14,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 19:14:14,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:14,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:14,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944551453] [2020-10-09 19:14:14,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:14:14,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 19:14:14,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337272753] [2020-10-09 19:14:14,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 19:14:14,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:14,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 19:14:14,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 19:14:14,912 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 120 [2020-10-09 19:14:14,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 113 transitions, 346 flow. Second operand 2 states. [2020-10-09 19:14:14,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:14,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 120 [2020-10-09 19:14:14,913 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:15,569 INFO L129 PetriNetUnfolder]: 1033/6791 cut-off events. [2020-10-09 19:14:15,570 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-09 19:14:15,586 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7877 conditions, 6791 events. 1033/6791 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 66991 event pairs, 522 based on Foata normal form. 522/6791 useless extension candidates. Maximal degree in co-relation 7867. Up to 1024 conditions per place. [2020-10-09 19:14:15,601 INFO L132 encePairwiseOnDemand]: 116/120 looper letters, 0 selfloop transitions, 0 changer transitions 1/109 dead transitions. [2020-10-09 19:14:15,601 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 109 transitions, 338 flow [2020-10-09 19:14:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 19:14:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 19:14:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 234 transitions. [2020-10-09 19:14:15,603 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.975 [2020-10-09 19:14:15,603 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 234 transitions. [2020-10-09 19:14:15,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 234 transitions. [2020-10-09 19:14:15,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:15,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 234 transitions. [2020-10-09 19:14:15,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 19:14:15,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 19:14:15,604 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 19:14:15,604 INFO L185 Difference]: Start difference. First operand has 117 places, 113 transitions, 346 flow. Second operand 2 states and 234 transitions. [2020-10-09 19:14:15,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 109 transitions, 338 flow [2020-10-09 19:14:15,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 109 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:14:15,609 INFO L241 Difference]: Finished difference. Result has 118 places, 108 transitions, 336 flow [2020-10-09 19:14:15,609 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=336, PETRI_PLACES=118, PETRI_TRANSITIONS=108} [2020-10-09 19:14:15,609 INFO L341 CegarLoopForPetriNet]: 117 programPoint places, 1 predicate places. [2020-10-09 19:14:15,609 INFO L481 AbstractCegarLoop]: Abstraction has has 118 places, 108 transitions, 336 flow [2020-10-09 19:14:15,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 19:14:15,610 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:15,610 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:15,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 mathsat -unsat_core_generation=3 [2020-10-09 19:14:15,820 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:15,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:15,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1635349747, now seen corresponding path program 1 times [2020-10-09 19:14:15,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:15,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470156206] [2020-10-09 19:14:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 31 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:15,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 19:14:15,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:15,913 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:15,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:15,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:15,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470156206] [2020-10-09 19:14:15,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:14:15,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-09 19:14:15,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83474181] [2020-10-09 19:14:15,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 19:14:15,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:15,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 19:14:15,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-09 19:14:16,843 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 120 [2020-10-09 19:14:16,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 108 transitions, 336 flow. Second operand 10 states. [2020-10-09 19:14:16,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:16,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 120 [2020-10-09 19:14:16,844 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:17,910 INFO L129 PetriNetUnfolder]: 1052/8428 cut-off events. [2020-10-09 19:14:17,910 INFO L130 PetriNetUnfolder]: For 1164/1164 co-relation queries the response was YES. [2020-10-09 19:14:17,943 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11915 conditions, 8428 events. 1052/8428 cut-off events. For 1164/1164 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 90121 event pairs, 550 based on Foata normal form. 0/7910 useless extension candidates. Maximal degree in co-relation 11904. Up to 1320 conditions per place. [2020-10-09 19:14:17,957 INFO L132 encePairwiseOnDemand]: 105/120 looper letters, 10 selfloop transitions, 15 changer transitions 0/114 dead transitions. [2020-10-09 19:14:17,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 114 transitions, 398 flow [2020-10-09 19:14:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 19:14:17,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 19:14:17,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 693 transitions. [2020-10-09 19:14:17,959 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.825 [2020-10-09 19:14:17,959 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 693 transitions. [2020-10-09 19:14:17,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 693 transitions. [2020-10-09 19:14:17,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:17,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 693 transitions. [2020-10-09 19:14:17,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 19:14:17,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 19:14:17,962 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 19:14:17,962 INFO L185 Difference]: Start difference. First operand has 118 places, 108 transitions, 336 flow. Second operand 7 states and 693 transitions. [2020-10-09 19:14:17,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 114 transitions, 398 flow [2020-10-09 19:14:17,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 114 transitions, 398 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:14:17,967 INFO L241 Difference]: Finished difference. Result has 125 places, 114 transitions, 409 flow [2020-10-09 19:14:17,967 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=409, PETRI_PLACES=125, PETRI_TRANSITIONS=114} [2020-10-09 19:14:17,967 INFO L341 CegarLoopForPetriNet]: 117 programPoint places, 8 predicate places. [2020-10-09 19:14:17,967 INFO L481 AbstractCegarLoop]: Abstraction has has 125 places, 114 transitions, 409 flow [2020-10-09 19:14:17,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 19:14:17,968 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:17,968 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:18,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 mathsat -unsat_core_generation=3 [2020-10-09 19:14:18,179 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:18,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1942933767, now seen corresponding path program 1 times [2020-10-09 19:14:18,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:18,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917713080] [2020-10-09 19:14:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 32 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:18,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:18,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:18,283 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:18,284 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:18,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:18,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917713080] [2020-10-09 19:14:18,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1204379158] [2020-10-09 19:14:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 33 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:14:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:18,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:18,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:18,549 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:18,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:18,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:18,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079973353] [2020-10-09 19:14:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:14:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:18,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:18,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:18,675 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:18,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:18,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:18,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:14:18,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 16 [2020-10-09 19:14:18,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778250195] [2020-10-09 19:14:18,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 19:14:18,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:18,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 19:14:18,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-09 19:14:20,064 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 120 [2020-10-09 19:14:20,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 114 transitions, 409 flow. Second operand 16 states. [2020-10-09 19:14:20,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:20,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 120 [2020-10-09 19:14:20,066 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:22,483 INFO L129 PetriNetUnfolder]: 1049/10703 cut-off events. [2020-10-09 19:14:22,483 INFO L130 PetriNetUnfolder]: For 4050/4050 co-relation queries the response was YES. [2020-10-09 19:14:22,526 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21195 conditions, 10703 events. 1049/10703 cut-off events. For 4050/4050 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 122978 event pairs, 551 based on Foata normal form. 512/11215 useless extension candidates. Maximal degree in co-relation 21181. Up to 1553 conditions per place. [2020-10-09 19:14:22,544 INFO L132 encePairwiseOnDemand]: 102/120 looper letters, 18 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2020-10-09 19:14:22,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 128 transitions, 541 flow [2020-10-09 19:14:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 19:14:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-09 19:14:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1503 transitions. [2020-10-09 19:14:22,547 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7828125 [2020-10-09 19:14:22,547 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1503 transitions. [2020-10-09 19:14:22,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1503 transitions. [2020-10-09 19:14:22,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:22,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1503 transitions. [2020-10-09 19:14:22,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-09 19:14:22,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-09 19:14:22,552 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-09 19:14:22,552 INFO L185 Difference]: Start difference. First operand has 125 places, 114 transitions, 409 flow. Second operand 16 states and 1503 transitions. [2020-10-09 19:14:22,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 128 transitions, 541 flow [2020-10-09 19:14:22,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 128 transitions, 536 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 19:14:22,565 INFO L241 Difference]: Finished difference. Result has 140 places, 126 transitions, 533 flow [2020-10-09 19:14:22,566 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=533, PETRI_PLACES=140, PETRI_TRANSITIONS=126} [2020-10-09 19:14:22,566 INFO L341 CegarLoopForPetriNet]: 117 programPoint places, 23 predicate places. [2020-10-09 19:14:22,566 INFO L481 AbstractCegarLoop]: Abstraction has has 140 places, 126 transitions, 533 flow [2020-10-09 19:14:22,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 19:14:22,566 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:22,566 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:23,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 mathsat -unsat_core_generation=3,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:14:23,175 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:23,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1254526926, now seen corresponding path program 1 times [2020-10-09 19:14:23,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:23,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547592947] [2020-10-09 19:14:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 35 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:14:23,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:14:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:14:23,285 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:14:23,312 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 19:14:23,313 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 19:14:23,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 mathsat -unsat_core_generation=3 [2020-10-09 19:14:23,513 WARN L371 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 19:14:23,514 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2020-10-09 19:14:23,526 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,526 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,526 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,526 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,526 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,527 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,527 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,527 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,527 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,527 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,527 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,527 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,528 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,528 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,528 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,528 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,528 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,528 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,529 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,529 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,529 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,529 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,529 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,529 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,529 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,529 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,529 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,529 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,530 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,530 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,530 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,530 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,530 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,530 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,530 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,530 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,530 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,530 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,530 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,531 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,531 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,531 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,531 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,531 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,531 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,531 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,531 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,531 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,532 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,532 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,532 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,532 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,532 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,532 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,532 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,532 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,532 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,533 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,533 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,533 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,533 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,533 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,533 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,533 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,533 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,533 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,534 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,534 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,535 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,535 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,535 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,535 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,535 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,536 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,536 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,536 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,536 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,536 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,537 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,537 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,537 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,538 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,538 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,539 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,539 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,539 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,539 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,539 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,540 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,541 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,541 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,541 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,541 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,543 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,543 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,544 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,544 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,544 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,545 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,545 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,545 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,545 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,546 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,546 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,546 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,546 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,547 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,547 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:23,552 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 19:14:23,553 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:14:23,553 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:14:23,553 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:14:23,553 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:14:23,553 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:14:23,553 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:14:23,553 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:14:23,553 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:14:23,554 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 131 places, 127 transitions, 398 flow [2020-10-09 19:14:25,354 INFO L129 PetriNetUnfolder]: 3861/18336 cut-off events. [2020-10-09 19:14:25,354 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-09 19:14:25,394 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20713 conditions, 18336 events. 3861/18336 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 206487 event pairs, 1291 based on Foata normal form. 0/15243 useless extension candidates. Maximal degree in co-relation 10172. Up to 2304 conditions per place. [2020-10-09 19:14:25,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 127 transitions, 398 flow [2020-10-09 19:14:25,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 120 transitions, 384 flow [2020-10-09 19:14:25,426 INFO L129 PetriNetUnfolder]: 7/70 cut-off events. [2020-10-09 19:14:25,426 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-10-09 19:14:25,427 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:25,427 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:25,427 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:25,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:25,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1742456686, now seen corresponding path program 1 times [2020-10-09 19:14:25,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:25,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636932188] [2020-10-09 19:14:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 36 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:25,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 19:14:25,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:25,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:25,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636932188] [2020-10-09 19:14:25,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:14:25,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 19:14:25,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669919147] [2020-10-09 19:14:25,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 19:14:25,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:25,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 19:14:25,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 19:14:25,502 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 127 [2020-10-09 19:14:25,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 120 transitions, 384 flow. Second operand 2 states. [2020-10-09 19:14:25,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:25,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 127 [2020-10-09 19:14:25,503 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:26,992 INFO L129 PetriNetUnfolder]: 2314/13717 cut-off events. [2020-10-09 19:14:26,992 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-09 19:14:27,020 INFO L80 FinitePrefix]: Finished finitePrefix Result has 16095 conditions, 13717 events. 2314/13717 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 154789 event pairs, 1291 based on Foata normal form. 1035/13717 useless extension candidates. Maximal degree in co-relation 16084. Up to 2304 conditions per place. [2020-10-09 19:14:27,042 INFO L132 encePairwiseOnDemand]: 123/127 looper letters, 0 selfloop transitions, 0 changer transitions 1/116 dead transitions. [2020-10-09 19:14:27,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 116 transitions, 376 flow [2020-10-09 19:14:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 19:14:27,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 19:14:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 248 transitions. [2020-10-09 19:14:27,044 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9763779527559056 [2020-10-09 19:14:27,044 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 248 transitions. [2020-10-09 19:14:27,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 248 transitions. [2020-10-09 19:14:27,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:27,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 248 transitions. [2020-10-09 19:14:27,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 19:14:27,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 19:14:27,045 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 19:14:27,045 INFO L185 Difference]: Start difference. First operand has 125 places, 120 transitions, 384 flow. Second operand 2 states and 248 transitions. [2020-10-09 19:14:27,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 116 transitions, 376 flow [2020-10-09 19:14:27,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 116 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:14:27,049 INFO L241 Difference]: Finished difference. Result has 126 places, 115 transitions, 374 flow [2020-10-09 19:14:27,050 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=374, PETRI_PLACES=126, PETRI_TRANSITIONS=115} [2020-10-09 19:14:27,050 INFO L341 CegarLoopForPetriNet]: 125 programPoint places, 1 predicate places. [2020-10-09 19:14:27,050 INFO L481 AbstractCegarLoop]: Abstraction has has 126 places, 115 transitions, 374 flow [2020-10-09 19:14:27,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 19:14:27,050 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:27,050 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:27,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 mathsat -unsat_core_generation=3 [2020-10-09 19:14:27,259 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:27,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1023266061, now seen corresponding path program 1 times [2020-10-09 19:14:27,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:27,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636628364] [2020-10-09 19:14:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 37 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:27,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 19:14:27,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:27,365 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:27,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:27,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:27,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636628364] [2020-10-09 19:14:27,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:14:27,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-09 19:14:27,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079351602] [2020-10-09 19:14:27,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 19:14:27,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:27,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 19:14:27,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-09 19:14:28,213 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 127 [2020-10-09 19:14:28,214 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 115 transitions, 374 flow. Second operand 10 states. [2020-10-09 19:14:28,214 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:28,214 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 127 [2020-10-09 19:14:28,215 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:30,454 INFO L129 PetriNetUnfolder]: 2340/16924 cut-off events. [2020-10-09 19:14:30,455 INFO L130 PetriNetUnfolder]: For 2496/2496 co-relation queries the response was YES. [2020-10-09 19:14:30,549 INFO L80 FinitePrefix]: Finished finitePrefix Result has 24028 conditions, 16924 events. 2340/16924 cut-off events. For 2496/2496 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 205635 event pairs, 1327 based on Foata normal form. 0/15893 useless extension candidates. Maximal degree in co-relation 24016. Up to 2610 conditions per place. [2020-10-09 19:14:30,579 INFO L132 encePairwiseOnDemand]: 112/127 looper letters, 10 selfloop transitions, 15 changer transitions 0/121 dead transitions. [2020-10-09 19:14:30,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 121 transitions, 436 flow [2020-10-09 19:14:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 19:14:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 19:14:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 742 transitions. [2020-10-09 19:14:30,581 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8346456692913385 [2020-10-09 19:14:30,581 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 742 transitions. [2020-10-09 19:14:30,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 742 transitions. [2020-10-09 19:14:30,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:30,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 742 transitions. [2020-10-09 19:14:30,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 19:14:30,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 19:14:30,583 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 19:14:30,583 INFO L185 Difference]: Start difference. First operand has 126 places, 115 transitions, 374 flow. Second operand 7 states and 742 transitions. [2020-10-09 19:14:30,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 121 transitions, 436 flow [2020-10-09 19:14:30,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 121 transitions, 436 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:14:30,586 INFO L241 Difference]: Finished difference. Result has 133 places, 121 transitions, 447 flow [2020-10-09 19:14:30,586 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=447, PETRI_PLACES=133, PETRI_TRANSITIONS=121} [2020-10-09 19:14:30,586 INFO L341 CegarLoopForPetriNet]: 125 programPoint places, 8 predicate places. [2020-10-09 19:14:30,587 INFO L481 AbstractCegarLoop]: Abstraction has has 133 places, 121 transitions, 447 flow [2020-10-09 19:14:30,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 19:14:30,587 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:30,587 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:30,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 mathsat -unsat_core_generation=3 [2020-10-09 19:14:30,794 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:30,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:30,794 INFO L82 PathProgramCache]: Analyzing trace with hash 326766497, now seen corresponding path program 1 times [2020-10-09 19:14:30,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:30,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407674672] [2020-10-09 19:14:30,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 38 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:30,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:30,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:30,905 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:30,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:30,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:31,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407674672] [2020-10-09 19:14:31,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1537243525] [2020-10-09 19:14:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 39 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:14:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:31,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:31,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:31,181 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:31,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:31,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:31,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260741223] [2020-10-09 19:14:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:14:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:31,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:31,311 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:31,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:31,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:31,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:14:31,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 16 [2020-10-09 19:14:31,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733880740] [2020-10-09 19:14:31,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 19:14:31,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:31,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 19:14:31,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-09 19:14:33,294 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 127 [2020-10-09 19:14:33,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 121 transitions, 447 flow. Second operand 16 states. [2020-10-09 19:14:33,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:33,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 127 [2020-10-09 19:14:33,296 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:37,616 INFO L129 PetriNetUnfolder]: 2337/21503 cut-off events. [2020-10-09 19:14:37,616 INFO L130 PetriNetUnfolder]: For 8223/8223 co-relation queries the response was YES. [2020-10-09 19:14:37,727 INFO L80 FinitePrefix]: Finished finitePrefix Result has 42550 conditions, 21503 events. 2337/21503 cut-off events. For 8223/8223 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 280061 event pairs, 1328 based on Foata normal form. 1024/22527 useless extension candidates. Maximal degree in co-relation 42535. Up to 3092 conditions per place. [2020-10-09 19:14:37,767 INFO L132 encePairwiseOnDemand]: 109/127 looper letters, 18 selfloop transitions, 25 changer transitions 0/135 dead transitions. [2020-10-09 19:14:37,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 135 transitions, 579 flow [2020-10-09 19:14:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 19:14:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-09 19:14:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1615 transitions. [2020-10-09 19:14:37,770 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7947834645669292 [2020-10-09 19:14:37,770 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1615 transitions. [2020-10-09 19:14:37,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1615 transitions. [2020-10-09 19:14:37,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:37,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1615 transitions. [2020-10-09 19:14:37,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-09 19:14:37,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-09 19:14:37,776 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-09 19:14:37,776 INFO L185 Difference]: Start difference. First operand has 133 places, 121 transitions, 447 flow. Second operand 16 states and 1615 transitions. [2020-10-09 19:14:37,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 135 transitions, 579 flow [2020-10-09 19:14:37,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 135 transitions, 574 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 19:14:37,794 INFO L241 Difference]: Finished difference. Result has 148 places, 133 transitions, 571 flow [2020-10-09 19:14:37,794 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=571, PETRI_PLACES=148, PETRI_TRANSITIONS=133} [2020-10-09 19:14:37,795 INFO L341 CegarLoopForPetriNet]: 125 programPoint places, 23 predicate places. [2020-10-09 19:14:37,795 INFO L481 AbstractCegarLoop]: Abstraction has has 148 places, 133 transitions, 571 flow [2020-10-09 19:14:37,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 19:14:37,795 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:37,795 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:38,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 cvc4 --incremental --print-success --lang smt --rewrite-divk,38 mathsat -unsat_core_generation=3,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:14:38,398 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:38,399 INFO L82 PathProgramCache]: Analyzing trace with hash -745457020, now seen corresponding path program 1 times [2020-10-09 19:14:38,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:38,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736689759] [2020-10-09 19:14:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 41 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:38,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 19:14:38,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-09 19:14:38,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-09 19:14:38,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736689759] [2020-10-09 19:14:38,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2056327117] [2020-10-09 19:14:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 42 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:14:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:38,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 19:14:38,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-09 19:14:38,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-09 19:14:38,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851995717] [2020-10-09 19:14:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:14:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:38,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 19:14:38,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-09 19:14:38,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-09 19:14:39,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:14:39,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 17 [2020-10-09 19:14:39,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114235494] [2020-10-09 19:14:39,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 19:14:39,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:39,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 19:14:39,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-09 19:14:40,424 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 127 [2020-10-09 19:14:40,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 133 transitions, 571 flow. Second operand 17 states. [2020-10-09 19:14:40,426 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:40,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 127 [2020-10-09 19:14:40,426 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:43,616 INFO L129 PetriNetUnfolder]: 2425/20788 cut-off events. [2020-10-09 19:14:43,617 INFO L130 PetriNetUnfolder]: For 23751/23751 co-relation queries the response was YES. [2020-10-09 19:14:43,713 INFO L80 FinitePrefix]: Finished finitePrefix Result has 50979 conditions, 20788 events. 2425/20788 cut-off events. For 23751/23751 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 272362 event pairs, 1494 based on Foata normal form. 161/20949 useless extension candidates. Maximal degree in co-relation 50961. Up to 2983 conditions per place. [2020-10-09 19:14:43,755 INFO L132 encePairwiseOnDemand]: 112/127 looper letters, 10 selfloop transitions, 31 changer transitions 0/141 dead transitions. [2020-10-09 19:14:43,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 141 transitions, 695 flow [2020-10-09 19:14:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 19:14:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-09 19:14:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2410 transitions. [2020-10-09 19:14:43,758 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8250599109893872 [2020-10-09 19:14:43,758 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2410 transitions. [2020-10-09 19:14:43,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2410 transitions. [2020-10-09 19:14:43,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:43,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2410 transitions. [2020-10-09 19:14:43,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-09 19:14:43,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-09 19:14:43,764 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-09 19:14:43,764 INFO L185 Difference]: Start difference. First operand has 148 places, 133 transitions, 571 flow. Second operand 23 states and 2410 transitions. [2020-10-09 19:14:43,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 141 transitions, 695 flow [2020-10-09 19:14:43,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 141 transitions, 684 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-09 19:14:43,820 INFO L241 Difference]: Finished difference. Result has 167 places, 140 transitions, 670 flow [2020-10-09 19:14:43,820 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=670, PETRI_PLACES=167, PETRI_TRANSITIONS=140} [2020-10-09 19:14:43,820 INFO L341 CegarLoopForPetriNet]: 125 programPoint places, 42 predicate places. [2020-10-09 19:14:43,820 INFO L481 AbstractCegarLoop]: Abstraction has has 167 places, 140 transitions, 670 flow [2020-10-09 19:14:43,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 19:14:43,821 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:43,821 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:44,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 mathsat -unsat_core_generation=3,42 cvc4 --incremental --print-success --lang smt --rewrite-divk,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:14:44,428 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:44,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:44,429 INFO L82 PathProgramCache]: Analyzing trace with hash -259566777, now seen corresponding path program 1 times [2020-10-09 19:14:44,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:44,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901770410] [2020-10-09 19:14:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 44 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:14:44,527 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:14:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:14:44,557 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:14:44,588 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 19:14:44,589 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 19:14:44,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 mathsat -unsat_core_generation=3 [2020-10-09 19:14:44,789 WARN L371 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 19:14:44,790 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2020-10-09 19:14:44,802 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,802 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,802 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,802 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,802 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,803 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,803 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,803 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,803 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,803 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,803 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,804 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,804 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,804 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,804 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,804 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,804 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,804 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,804 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,804 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,804 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,804 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,805 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,805 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,805 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,805 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,805 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,805 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,805 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,805 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,805 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,805 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,805 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,805 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,806 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,806 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,806 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,806 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,806 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,806 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,806 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,806 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,806 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,806 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,807 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,807 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,807 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,807 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,807 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,807 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,807 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,808 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,808 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,808 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,808 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,808 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,808 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,808 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,809 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,809 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,809 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,809 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,809 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,809 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,809 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,809 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,810 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,810 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,810 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,810 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,810 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,810 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,811 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,811 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,811 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,814 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,814 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,814 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,814 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,814 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,815 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,815 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,815 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,815 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,815 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,816 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,816 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,816 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,816 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,816 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,817 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,817 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,817 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,817 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,817 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,818 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,818 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,818 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,818 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,819 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,819 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,819 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,820 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,820 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,820 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,820 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,821 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,821 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,821 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,821 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,821 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,822 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,822 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,822 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,822 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,823 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,823 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,824 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,824 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,824 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:14:44,834 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 19:14:44,834 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:14:44,835 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:14:44,835 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:14:44,835 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:14:44,835 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:14:44,835 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:14:44,835 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:14:44,835 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:14:44,836 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 139 places, 134 transitions, 438 flow [2020-10-09 19:14:48,616 INFO L129 PetriNetUnfolder]: 8215/37039 cut-off events. [2020-10-09 19:14:48,617 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-09 19:14:48,878 INFO L80 FinitePrefix]: Finished finitePrefix Result has 42245 conditions, 37039 events. 8215/37039 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 468057 event pairs, 3084 based on Foata normal form. 0/30872 useless extension candidates. Maximal degree in co-relation 20694. Up to 5120 conditions per place. [2020-10-09 19:14:48,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 134 transitions, 438 flow [2020-10-09 19:14:48,958 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 127 transitions, 424 flow [2020-10-09 19:14:48,960 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-10-09 19:14:48,960 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 19:14:48,960 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:48,961 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:48,961 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:48,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:48,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1675019410, now seen corresponding path program 1 times [2020-10-09 19:14:48,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:48,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214761738] [2020-10-09 19:14:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 45 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:49,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 19:14:49,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:49,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:49,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214761738] [2020-10-09 19:14:49,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:14:49,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 19:14:49,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54928046] [2020-10-09 19:14:49,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 19:14:49,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:49,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 19:14:49,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 19:14:49,045 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 134 [2020-10-09 19:14:49,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 127 transitions, 424 flow. Second operand 2 states. [2020-10-09 19:14:49,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:49,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 134 [2020-10-09 19:14:49,046 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:51,759 INFO L129 PetriNetUnfolder]: 5131/27811 cut-off events. [2020-10-09 19:14:51,759 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-09 19:14:51,954 INFO L80 FinitePrefix]: Finished finitePrefix Result has 33018 conditions, 27811 events. 5131/27811 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 351684 event pairs, 3084 based on Foata normal form. 2060/27811 useless extension candidates. Maximal degree in co-relation 33006. Up to 5120 conditions per place. [2020-10-09 19:14:52,033 INFO L132 encePairwiseOnDemand]: 130/134 looper letters, 0 selfloop transitions, 0 changer transitions 1/123 dead transitions. [2020-10-09 19:14:52,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 123 transitions, 416 flow [2020-10-09 19:14:52,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 19:14:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 19:14:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 262 transitions. [2020-10-09 19:14:52,034 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9776119402985075 [2020-10-09 19:14:52,034 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 262 transitions. [2020-10-09 19:14:52,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 262 transitions. [2020-10-09 19:14:52,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:52,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 262 transitions. [2020-10-09 19:14:52,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 19:14:52,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 19:14:52,035 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 19:14:52,035 INFO L185 Difference]: Start difference. First operand has 133 places, 127 transitions, 424 flow. Second operand 2 states and 262 transitions. [2020-10-09 19:14:52,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 123 transitions, 416 flow [2020-10-09 19:14:52,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 123 transitions, 416 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:14:52,046 INFO L241 Difference]: Finished difference. Result has 134 places, 122 transitions, 414 flow [2020-10-09 19:14:52,046 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=414, PETRI_PLACES=134, PETRI_TRANSITIONS=122} [2020-10-09 19:14:52,046 INFO L341 CegarLoopForPetriNet]: 133 programPoint places, 1 predicate places. [2020-10-09 19:14:52,046 INFO L481 AbstractCegarLoop]: Abstraction has has 134 places, 122 transitions, 414 flow [2020-10-09 19:14:52,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 19:14:52,047 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:52,047 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:52,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 mathsat -unsat_core_generation=3 [2020-10-09 19:14:52,247 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:52,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1900757261, now seen corresponding path program 1 times [2020-10-09 19:14:52,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:52,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967902726] [2020-10-09 19:14:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 46 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:52,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 19:14:52,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:52,361 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:52,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:52,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:14:52,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967902726] [2020-10-09 19:14:52,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:14:52,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-09 19:14:52,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42352591] [2020-10-09 19:14:52,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 19:14:52,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:52,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 19:14:52,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-09 19:14:53,321 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 134 [2020-10-09 19:14:53,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 122 transitions, 414 flow. Second operand 10 states. [2020-10-09 19:14:53,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:14:53,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 134 [2020-10-09 19:14:53,322 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:14:57,814 INFO L129 PetriNetUnfolder]: 5165/34128 cut-off events. [2020-10-09 19:14:57,814 INFO L130 PetriNetUnfolder]: For 5375/5375 co-relation queries the response was YES. [2020-10-09 19:14:58,047 INFO L80 FinitePrefix]: Finished finitePrefix Result has 48692 conditions, 34128 events. 5165/34128 cut-off events. For 5375/5375 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 463343 event pairs, 3129 based on Foata normal form. 0/32072 useless extension candidates. Maximal degree in co-relation 48679. Up to 5181 conditions per place. [2020-10-09 19:14:58,115 INFO L132 encePairwiseOnDemand]: 119/134 looper letters, 10 selfloop transitions, 15 changer transitions 0/128 dead transitions. [2020-10-09 19:14:58,116 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 128 transitions, 476 flow [2020-10-09 19:14:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 19:14:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 19:14:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 791 transitions. [2020-10-09 19:14:58,117 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8432835820895522 [2020-10-09 19:14:58,117 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 791 transitions. [2020-10-09 19:14:58,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 791 transitions. [2020-10-09 19:14:58,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:14:58,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 791 transitions. [2020-10-09 19:14:58,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 19:14:58,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 19:14:58,119 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 19:14:58,119 INFO L185 Difference]: Start difference. First operand has 134 places, 122 transitions, 414 flow. Second operand 7 states and 791 transitions. [2020-10-09 19:14:58,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 128 transitions, 476 flow [2020-10-09 19:14:58,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 128 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:14:58,128 INFO L241 Difference]: Finished difference. Result has 141 places, 128 transitions, 487 flow [2020-10-09 19:14:58,128 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=487, PETRI_PLACES=141, PETRI_TRANSITIONS=128} [2020-10-09 19:14:58,128 INFO L341 CegarLoopForPetriNet]: 133 programPoint places, 8 predicate places. [2020-10-09 19:14:58,128 INFO L481 AbstractCegarLoop]: Abstraction has has 141 places, 128 transitions, 487 flow [2020-10-09 19:14:58,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 19:14:58,128 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:14:58,129 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:14:58,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 mathsat -unsat_core_generation=3 [2020-10-09 19:14:58,334 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:14:58,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:14:58,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1382467281, now seen corresponding path program 1 times [2020-10-09 19:14:58,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:14:58,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159142787] [2020-10-09 19:14:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 47 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with mathsat -unsat_core_generation=3 [2020-10-09 19:14:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:58,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:58,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:58,457 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:58,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:58,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:58,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159142787] [2020-10-09 19:14:58,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [73843829] [2020-10-09 19:14:58,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 48 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:14:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:58,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:58,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:58,752 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:58,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:58,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:58,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079269774] [2020-10-09 19:14:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:14:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:14:58,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:14:58,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:14:58,907 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:14:58,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:14:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:58,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:14:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 19:14:58,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:14:58,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 16 [2020-10-09 19:14:58,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595245625] [2020-10-09 19:14:58,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 19:14:58,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:14:58,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 19:14:58,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-09 19:15:00,099 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 134 [2020-10-09 19:15:00,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 128 transitions, 487 flow. Second operand 16 states. [2020-10-09 19:15:00,100 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:15:00,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 134 [2020-10-09 19:15:00,101 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:15:07,048 INFO L129 PetriNetUnfolder]: 5162/43315 cut-off events. [2020-10-09 19:15:07,049 INFO L130 PetriNetUnfolder]: For 16762/16762 co-relation queries the response was YES. [2020-10-09 19:15:07,395 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85674 conditions, 43315 events. 5162/43315 cut-off events. For 16762/16762 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 629213 event pairs, 3130 based on Foata normal form. 2048/45363 useless extension candidates. Maximal degree in co-relation 85658. Up to 6167 conditions per place. [2020-10-09 19:15:07,488 INFO L132 encePairwiseOnDemand]: 116/134 looper letters, 18 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2020-10-09 19:15:07,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 142 transitions, 619 flow [2020-10-09 19:15:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 19:15:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-09 19:15:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1727 transitions. [2020-10-09 19:15:07,490 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8055037313432836 [2020-10-09 19:15:07,490 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1727 transitions. [2020-10-09 19:15:07,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1727 transitions. [2020-10-09 19:15:07,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:15:07,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1727 transitions. [2020-10-09 19:15:07,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-09 19:15:07,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-09 19:15:07,497 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-09 19:15:07,497 INFO L185 Difference]: Start difference. First operand has 141 places, 128 transitions, 487 flow. Second operand 16 states and 1727 transitions. [2020-10-09 19:15:07,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 142 transitions, 619 flow [2020-10-09 19:15:07,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 142 transitions, 614 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 19:15:07,529 INFO L241 Difference]: Finished difference. Result has 156 places, 140 transitions, 611 flow [2020-10-09 19:15:07,529 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=611, PETRI_PLACES=156, PETRI_TRANSITIONS=140} [2020-10-09 19:15:07,530 INFO L341 CegarLoopForPetriNet]: 133 programPoint places, 23 predicate places. [2020-10-09 19:15:07,530 INFO L481 AbstractCegarLoop]: Abstraction has has 156 places, 140 transitions, 611 flow [2020-10-09 19:15:07,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 19:15:07,530 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:15:07,530 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:15:08,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 cvc4 --incremental --print-success --lang smt --rewrite-divk,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 mathsat -unsat_core_generation=3 [2020-10-09 19:15:08,134 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:15:08,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:15:08,134 INFO L82 PathProgramCache]: Analyzing trace with hash -296622380, now seen corresponding path program 1 times [2020-10-09 19:15:08,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:15:08,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648421809] [2020-10-09 19:15:08,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 50 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with mathsat -unsat_core_generation=3 [2020-10-09 19:15:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:15:08,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 19:15:08,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:15:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-09 19:15:08,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:15:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-09 19:15:08,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648421809] [2020-10-09 19:15:08,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [915339312] [2020-10-09 19:15:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 51 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:15:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:15:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 19:15:08,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:15:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-09 19:15:08,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:15:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-09 19:15:08,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757147283] [2020-10-09 19:15:08,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:15:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:15:08,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 19:15:08,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:15:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-09 19:15:08,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:15:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-09 19:15:08,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:15:08,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 17 [2020-10-09 19:15:08,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146384443] [2020-10-09 19:15:08,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 19:15:08,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:15:08,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 19:15:08,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-09 19:15:09,953 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 134 [2020-10-09 19:15:09,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 140 transitions, 611 flow. Second operand 17 states. [2020-10-09 19:15:09,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:15:09,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 134 [2020-10-09 19:15:09,955 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:15:17,937 INFO L129 PetriNetUnfolder]: 5303/42569 cut-off events. [2020-10-09 19:15:17,938 INFO L130 PetriNetUnfolder]: For 48290/48290 co-relation queries the response was YES. [2020-10-09 19:15:18,248 INFO L80 FinitePrefix]: Finished finitePrefix Result has 103909 conditions, 42569 events. 5303/42569 cut-off events. For 48290/48290 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 622138 event pairs, 3368 based on Foata normal form. 216/42785 useless extension candidates. Maximal degree in co-relation 103890. Up to 6053 conditions per place. [2020-10-09 19:15:18,343 INFO L132 encePairwiseOnDemand]: 119/134 looper letters, 10 selfloop transitions, 31 changer transitions 0/148 dead transitions. [2020-10-09 19:15:18,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 148 transitions, 735 flow [2020-10-09 19:15:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 19:15:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-09 19:15:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2571 transitions. [2020-10-09 19:15:18,345 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8341985723556132 [2020-10-09 19:15:18,345 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2571 transitions. [2020-10-09 19:15:18,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2571 transitions. [2020-10-09 19:15:18,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:15:18,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2571 transitions. [2020-10-09 19:15:18,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-09 19:15:18,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-09 19:15:18,351 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-09 19:15:18,351 INFO L185 Difference]: Start difference. First operand has 156 places, 140 transitions, 611 flow. Second operand 23 states and 2571 transitions. [2020-10-09 19:15:18,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 148 transitions, 735 flow [2020-10-09 19:15:18,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 148 transitions, 724 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-09 19:15:18,468 INFO L241 Difference]: Finished difference. Result has 175 places, 147 transitions, 710 flow [2020-10-09 19:15:18,468 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=710, PETRI_PLACES=175, PETRI_TRANSITIONS=147} [2020-10-09 19:15:18,468 INFO L341 CegarLoopForPetriNet]: 133 programPoint places, 42 predicate places. [2020-10-09 19:15:18,468 INFO L481 AbstractCegarLoop]: Abstraction has has 175 places, 147 transitions, 710 flow [2020-10-09 19:15:18,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 19:15:18,468 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:15:18,469 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:15:19,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 cvc4 --incremental --print-success --lang smt --rewrite-divk,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 mathsat -unsat_core_generation=3 [2020-10-09 19:15:19,070 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:15:19,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:15:19,071 INFO L82 PathProgramCache]: Analyzing trace with hash 96274939, now seen corresponding path program 1 times [2020-10-09 19:15:19,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:15:19,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731198614] [2020-10-09 19:15:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 53 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with mathsat -unsat_core_generation=3 [2020-10-09 19:15:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:15:19,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 19:15:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:15:19,212 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:15:19,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:15:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:15:19,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:15:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:15:20,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731198614] [2020-10-09 19:15:20,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:15:20,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26, 26] imperfect sequences [] total 50 [2020-10-09 19:15:20,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388088508] [2020-10-09 19:15:20,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-09 19:15:20,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:15:20,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-09 19:15:20,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=1941, Unknown=0, NotChecked=0, Total=2450 [2020-10-09 19:15:30,722 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 134 [2020-10-09 19:15:30,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 147 transitions, 710 flow. Second operand 50 states. [2020-10-09 19:15:30,725 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:15:30,725 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 134 [2020-10-09 19:15:30,725 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:15:31,796 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2020-10-09 19:15:40,373 INFO L129 PetriNetUnfolder]: 5303/42566 cut-off events. [2020-10-09 19:15:40,373 INFO L130 PetriNetUnfolder]: For 97880/97880 co-relation queries the response was YES. [2020-10-09 19:15:40,738 INFO L80 FinitePrefix]: Finished finitePrefix Result has 119854 conditions, 42566 events. 5303/42566 cut-off events. For 97880/97880 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 622159 event pairs, 3368 based on Foata normal form. 1/42567 useless extension candidates. Maximal degree in co-relation 119834. Up to 8177 conditions per place. [2020-10-09 19:15:40,844 INFO L132 encePairwiseOnDemand]: 119/134 looper letters, 25 selfloop transitions, 52 changer transitions 0/185 dead transitions. [2020-10-09 19:15:40,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 185 transitions, 1175 flow [2020-10-09 19:15:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-09 19:15:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-09 19:15:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4461 transitions. [2020-10-09 19:15:40,849 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8119767018565708 [2020-10-09 19:15:40,849 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4461 transitions. [2020-10-09 19:15:40,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4461 transitions. [2020-10-09 19:15:40,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:15:40,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4461 transitions. [2020-10-09 19:15:40,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 42 states. [2020-10-09 19:15:40,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 42 states. [2020-10-09 19:15:40,860 INFO L81 ComplementDD]: Finished complementDD. Result 42 states. [2020-10-09 19:15:40,860 INFO L185 Difference]: Start difference. First operand has 175 places, 147 transitions, 710 flow. Second operand 41 states and 4461 transitions. [2020-10-09 19:15:40,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 185 transitions, 1175 flow [2020-10-09 19:15:41,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 185 transitions, 1042 flow, removed 21 selfloop flow, removed 10 redundant places. [2020-10-09 19:15:41,107 INFO L241 Difference]: Finished difference. Result has 205 places, 179 transitions, 938 flow [2020-10-09 19:15:41,107 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=938, PETRI_PLACES=205, PETRI_TRANSITIONS=179} [2020-10-09 19:15:41,107 INFO L341 CegarLoopForPetriNet]: 133 programPoint places, 72 predicate places. [2020-10-09 19:15:41,107 INFO L481 AbstractCegarLoop]: Abstraction has has 205 places, 179 transitions, 938 flow [2020-10-09 19:15:41,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-09 19:15:41,108 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:15:41,108 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:15:41,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 mathsat -unsat_core_generation=3 [2020-10-09 19:15:41,319 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:15:41,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:15:41,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1742445301, now seen corresponding path program 1 times [2020-10-09 19:15:41,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:15:41,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095322125] [2020-10-09 19:15:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 54 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with mathsat -unsat_core_generation=3 [2020-10-09 19:15:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:15:41,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 19:15:41,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:15:41,455 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:15:41,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:15:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-09 19:15:41,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:15:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-09 19:15:41,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095322125] [2020-10-09 19:15:41,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [507662311] [2020-10-09 19:15:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 55 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:15:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:15:41,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 19:15:41,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:15:41,929 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:15:41,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:15:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-09 19:15:42,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:15:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-09 19:15:42,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58574204] [2020-10-09 19:15:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:15:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:15:42,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 19:15:42,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:15:42,168 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:15:42,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:15:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-09 19:15:42,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:15:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-09 19:15:42,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:15:42,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 28 [2020-10-09 19:15:42,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924522740] [2020-10-09 19:15:42,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 19:15:42,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:15:42,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 19:15:42,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2020-10-09 19:15:44,979 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 134 [2020-10-09 19:15:44,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 179 transitions, 938 flow. Second operand 28 states. [2020-10-09 19:15:44,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:15:44,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 134 [2020-10-09 19:15:44,981 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:15:57,515 INFO L129 PetriNetUnfolder]: 5285/55998 cut-off events. [2020-10-09 19:15:57,516 INFO L130 PetriNetUnfolder]: For 104189/104189 co-relation queries the response was YES. [2020-10-09 19:15:58,049 INFO L80 FinitePrefix]: Finished finitePrefix Result has 165275 conditions, 55998 events. 5285/55998 cut-off events. For 104189/104189 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 876966 event pairs, 3365 based on Foata normal form. 1938/57936 useless extension candidates. Maximal degree in co-relation 165255. Up to 7967 conditions per place. [2020-10-09 19:15:58,175 INFO L132 encePairwiseOnDemand]: 116/134 looper letters, 37 selfloop transitions, 49 changer transitions 0/188 dead transitions. [2020-10-09 19:15:58,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 188 transitions, 1183 flow [2020-10-09 19:15:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 19:15:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-09 19:15:58,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2793 transitions. [2020-10-09 19:15:58,178 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8016647531572905 [2020-10-09 19:15:58,179 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2793 transitions. [2020-10-09 19:15:58,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2793 transitions. [2020-10-09 19:15:58,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:15:58,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2793 transitions. [2020-10-09 19:15:58,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-09 19:15:58,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-09 19:15:58,186 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-09 19:15:58,186 INFO L185 Difference]: Start difference. First operand has 205 places, 179 transitions, 938 flow. Second operand 26 states and 2793 transitions. [2020-10-09 19:15:58,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 188 transitions, 1183 flow [2020-10-09 19:15:58,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 188 transitions, 1082 flow, removed 13 selfloop flow, removed 13 redundant places. [2020-10-09 19:15:58,462 INFO L241 Difference]: Finished difference. Result has 220 places, 185 transitions, 1030 flow [2020-10-09 19:15:58,462 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1030, PETRI_PLACES=220, PETRI_TRANSITIONS=185} [2020-10-09 19:15:58,462 INFO L341 CegarLoopForPetriNet]: 133 programPoint places, 87 predicate places. [2020-10-09 19:15:58,462 INFO L481 AbstractCegarLoop]: Abstraction has has 220 places, 185 transitions, 1030 flow [2020-10-09 19:15:58,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 19:15:58,463 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:15:58,463 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:15:59,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 cvc4 --incremental --print-success --lang smt --rewrite-divk,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 mathsat -unsat_core_generation=3 [2020-10-09 19:15:59,064 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:15:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:15:59,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1482614890, now seen corresponding path program 1 times [2020-10-09 19:15:59,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:15:59,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742887750] [2020-10-09 19:15:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 57 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with mathsat -unsat_core_generation=3 [2020-10-09 19:15:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:15:59,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 19:15:59,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:15:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 46 proven. 50 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-09 19:15:59,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:15:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 46 proven. 50 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-09 19:15:59,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742887750] [2020-10-09 19:15:59,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1232265865] [2020-10-09 19:15:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 58 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:15:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:15:59,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 19:15:59,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:15:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 46 proven. 50 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-09 19:15:59,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:15:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 46 proven. 50 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-09 19:15:59,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117089050] [2020-10-09 19:15:59,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:15:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:15:59,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 19:15:59,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:16:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 46 proven. 50 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-09 19:16:00,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:16:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 46 proven. 50 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-09 19:16:00,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:16:00,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 29 [2020-10-09 19:16:00,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802070037] [2020-10-09 19:16:00,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 19:16:00,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:16:00,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 19:16:00,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-09 19:16:03,461 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 134 [2020-10-09 19:16:03,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 185 transitions, 1030 flow. Second operand 29 states. [2020-10-09 19:16:03,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:16:03,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 134 [2020-10-09 19:16:03,463 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:16:12,784 INFO L129 PetriNetUnfolder]: 6259/45362 cut-off events. [2020-10-09 19:16:12,784 INFO L130 PetriNetUnfolder]: For 128911/128911 co-relation queries the response was YES. [2020-10-09 19:16:13,238 INFO L80 FinitePrefix]: Finished finitePrefix Result has 149098 conditions, 45362 events. 6259/45362 cut-off events. For 128911/128911 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 653406 event pairs, 4984 based on Foata normal form. 786/46148 useless extension candidates. Maximal degree in co-relation 149076. Up to 6994 conditions per place. [2020-10-09 19:16:13,363 INFO L132 encePairwiseOnDemand]: 119/134 looper letters, 17 selfloop transitions, 68 changer transitions 0/195 dead transitions. [2020-10-09 19:16:13,363 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 195 transitions, 1304 flow [2020-10-09 19:16:13,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-09 19:16:13,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-09 19:16:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4127 transitions. [2020-10-09 19:16:13,367 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8323920935861234 [2020-10-09 19:16:13,367 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4127 transitions. [2020-10-09 19:16:13,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4127 transitions. [2020-10-09 19:16:13,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:16:13,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4127 transitions. [2020-10-09 19:16:13,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-09 19:16:13,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-09 19:16:13,377 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-09 19:16:13,377 INFO L185 Difference]: Start difference. First operand has 220 places, 185 transitions, 1030 flow. Second operand 37 states and 4127 transitions. [2020-10-09 19:16:13,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 195 transitions, 1304 flow [2020-10-09 19:16:13,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 195 transitions, 1248 flow, removed 6 selfloop flow, removed 17 redundant places. [2020-10-09 19:16:13,758 INFO L241 Difference]: Finished difference. Result has 240 places, 193 transitions, 1203 flow [2020-10-09 19:16:13,758 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1203, PETRI_PLACES=240, PETRI_TRANSITIONS=193} [2020-10-09 19:16:13,759 INFO L341 CegarLoopForPetriNet]: 133 programPoint places, 107 predicate places. [2020-10-09 19:16:13,759 INFO L481 AbstractCegarLoop]: Abstraction has has 240 places, 193 transitions, 1203 flow [2020-10-09 19:16:13,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 19:16:13,759 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:16:13,759 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:16:14,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 cvc4 --incremental --print-success --lang smt --rewrite-divk,57 mathsat -unsat_core_generation=3 [2020-10-09 19:16:14,373 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:16:14,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:16:14,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1429452328, now seen corresponding path program 1 times [2020-10-09 19:16:14,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:16:14,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241685413] [2020-10-09 19:16:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 60 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with mathsat -unsat_core_generation=3 [2020-10-09 19:16:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:16:14,523 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:16:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:16:14,570 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:16:14,627 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 19:16:14,627 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 19:16:14,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 mathsat -unsat_core_generation=3 [2020-10-09 19:16:14,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 07:16:14 BasicIcfg [2020-10-09 19:16:14,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 19:16:14,980 INFO L168 Benchmark]: Toolchain (without parser) took 148271.11 ms. Allocated memory was 252.2 MB in the beginning and 4.7 GB in the end (delta: 4.4 GB). Free memory was 207.5 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 3.3 GB. Max. memory is 14.2 GB. [2020-10-09 19:16:14,980 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 19:16:14,981 INFO L168 Benchmark]: CACSL2BoogieTranslator took 664.94 ms. Allocated memory was 252.2 MB in the beginning and 316.7 MB in the end (delta: 64.5 MB). Free memory was 207.5 MB in the beginning and 272.4 MB in the end (delta: -64.8 MB). Peak memory consumption was 32.3 MB. Max. memory is 14.2 GB. [2020-10-09 19:16:14,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.74 ms. Allocated memory is still 316.7 MB. Free memory was 272.4 MB in the beginning and 269.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 19:16:14,981 INFO L168 Benchmark]: Boogie Preprocessor took 39.59 ms. Allocated memory is still 316.7 MB. Free memory was 269.9 MB in the beginning and 267.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 19:16:14,982 INFO L168 Benchmark]: RCFGBuilder took 397.64 ms. Allocated memory is still 316.7 MB. Free memory was 267.3 MB in the beginning and 245.4 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.2 GB. [2020-10-09 19:16:14,983 INFO L168 Benchmark]: TraceAbstraction took 147115.15 ms. Allocated memory was 316.7 MB in the beginning and 4.7 GB in the end (delta: 4.4 GB). Free memory was 245.4 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 3.3 GB. Max. memory is 14.2 GB. [2020-10-09 19:16:14,985 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 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 664.94 ms. Allocated memory was 252.2 MB in the beginning and 316.7 MB in the end (delta: 64.5 MB). Free memory was 207.5 MB in the beginning and 272.4 MB in the end (delta: -64.8 MB). Peak memory consumption was 32.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 45.74 ms. Allocated memory is still 316.7 MB. Free memory was 272.4 MB in the beginning and 269.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 39.59 ms. Allocated memory is still 316.7 MB. Free memory was 269.9 MB in the beginning and 267.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 397.64 ms. Allocated memory is still 316.7 MB. Free memory was 267.3 MB in the beginning and 245.4 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 147115.15 ms. Allocated memory was 316.7 MB in the beginning and 4.7 GB in the end (delta: 4.4 GB). Free memory was 245.4 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 3.3 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 678]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L679] 0 int a[10] = {0}; VAL [a={3:0}] [L680] 0 int x = 0; VAL [a={3:0}, x=0] [L687] 0 pthread_t t[10]; VAL [a={3:0}, x=0] [L688] 0 int i; VAL [a={3:0}, x=0] [L689] 0 int n = __VERIFIER_nondet_uint(); VAL [a={3:0}, x=0] [L676] COND FALSE 0 !(!cond) VAL [a={3:0}, x=0] [L691] 0 i = 0 VAL [a={3:0}, x=0] [L691] COND TRUE 0 i < n VAL [a={3:0}, x=0] [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={3:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={3:0}, arg={0:0}, x=0] [L691] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, x=0] [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={3:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={3:0}, arg={0:0}, x=0] [L691] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, x=0] [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={3:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={3:0}, arg={0:0}, x=0] [L691] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, x=0] [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={3:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={3:0}, arg={0:0}, x=0] [L691] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, x=0] [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={3:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={3:0}, arg={0:0}, x=0] [L691] COND FALSE 0 !(i < n) VAL [a={3:0}, arg={0:0}, x=0] [L694] 0 i = 0 VAL [a={3:0}, arg={0:0}, x=0] [L694] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, x=0] [L682] 1 int t = x; VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=0] [L683] 1 a[t] = 1 VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=0] [L684] 1 x = t + 1 VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=1] [L695] 0 t[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=1] [L695] FCALL, JOIN 1 pthread_join(t[i], ((void *)0)) VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=1] [L694] 0 i++ VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=1] [L694] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=1] [L682] 2 int t = x; VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=1] [L683] 2 a[t] = 1 VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=1] [L684] 2 x = t + 1 VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=2] [L695] 0 t[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=2] [L695] FCALL, JOIN 2 pthread_join(t[i], ((void *)0)) VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=2] [L694] 0 i++ VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=2] [L694] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=2] [L695] 0 t[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=0, x=2] [L682] 5 int t = x; VAL [a={3:0}, arg={0:0}, arg={0:0}, t=2, x=2] [L683] 5 a[t] = 1 VAL [a={3:0}, arg={0:0}, arg={0:0}, t=2, x=2] [L684] 5 x = t + 1 VAL [a={3:0}, arg={0:0}, arg={0:0}, t=2, x=3] [L695] FCALL, JOIN 5 pthread_join(t[i], ((void *)0)) VAL [a={3:0}, arg={0:0}, arg={0:0}, t=2, x=3] [L694] 0 i++ VAL [a={3:0}, arg={0:0}, arg={0:0}, t=2, x=3] [L694] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, arg={0:0}, t=2, x=3] [L682] 3 int t = x; VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=3] [L683] 3 a[t] = 1 VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=3] [L684] 3 x = t + 1 VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=4] [L695] 0 t[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=4] [L695] FCALL, JOIN 3 pthread_join(t[i], ((void *)0)) VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=4] [L694] 0 i++ VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=4] [L694] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=4] [L695] 0 t[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=4] [L682] 4 int t = x; VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=4] [L683] 4 a[t] = 1 VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=4] [L684] 4 x = t + 1 VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L695] FCALL, JOIN 4 pthread_join(t[i], ((void *)0)) VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L694] 0 i++ VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L694] COND FALSE 0 !(i < n) VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L697] 0 int sum = 0; VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L698] 0 i = 0 VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L698] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L699] EXPR 0 a[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L699] 0 sum += a[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L698] 0 i++ VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L698] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L699] EXPR 0 a[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L699] 0 sum += a[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L698] 0 i++ VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L698] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L699] EXPR 0 a[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L699] 0 sum += a[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L698] 0 i++ VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L698] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L699] EXPR 0 a[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L699] 0 sum += a[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L698] 0 i++ VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L698] COND TRUE 0 i < n VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L699] EXPR 0 a[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L699] 0 sum += a[i] VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L698] 0 i++ VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L698] COND FALSE 0 !(i < n) VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L678] COND TRUE 0 !(cond) VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] [L678] 0 __VERIFIER_error() VAL [a={3:0}, arg={0:0}, arg={0:0}, t=3, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 64 locations, 1 error locations. Started 10 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 146.5s, OverallIterations: 39, TraceHistogramMax: 11, AutomataDifference: 115.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.7s, HoareTripleCheckerStatistics: 251 SDtfs, 3591 SDslu, 5040 SDs, 0 SdLazy, 7074 SolverSat, 549 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6086 GetRequests, 5524 SyntacticMatches, 39 SemanticMatches, 523 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4627 ImplicationChecksByTransitivity, 13.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1203occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 3667 NumberOfCodeBlocks, 3667 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 5850 ConstructedInterpolants, 0 QuantifiedInterpolants, 1314247 SizeOfPredicates, 343 NumberOfNonLiveVariables, 5987 ConjunctsInSsa, 414 ConjunctsInUnsatCore, 98 InterpolantComputations, 38 PerfectInterpolantSequences, 2154/2826 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 incorrect! Received shutdown request...