/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-ext/17_szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 15:15:44,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 15:15:44,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 15:15:44,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 15:15:44,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 15:15:44,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 15:15:44,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 15:15:44,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 15:15:44,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 15:15:44,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 15:15:44,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 15:15:44,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 15:15:44,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 15:15:44,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 15:15:44,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 15:15:44,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 15:15:44,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 15:15:44,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 15:15:44,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 15:15:44,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 15:15:44,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 15:15:44,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 15:15:44,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 15:15:44,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 15:15:44,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 15:15:44,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 15:15:44,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 15:15:44,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 15:15:44,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 15:15:44,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 15:15:44,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 15:15:44,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 15:15:44,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 15:15:44,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 15:15:44,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 15:15:44,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 15:15:44,996 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 15:15:45,017 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 15:15:45,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 15:15:45,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 15:15:45,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 15:15:45,018 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 15:15:45,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 15:15:45,019 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 15:15:45,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 15:15:45,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 15:15:45,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 15:15:45,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 15:15:45,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 15:15:45,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 15:15:45,020 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 15:15:45,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 15:15:45,021 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 15:15:45,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 15:15:45,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 15:15:45,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 15:15:45,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 15:15:45,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 15:15:45,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 15:15:45,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 15:15:45,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 15:15:45,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 15:15:45,022 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 15:15:45,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 15:15:45,023 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 15:15:45,023 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 15:15:45,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 15:15:45,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 15:15:45,326 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 15:15:45,331 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 15:15:45,332 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 15:15:45,339 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 15:15:45,340 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i [2020-10-09 15:15:45,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a198da0f8/dfb62e2b3406411890e35a771d400dc1/FLAG9501d9a0d [2020-10-09 15:15:45,888 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 15:15:45,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i [2020-10-09 15:15:45,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a198da0f8/dfb62e2b3406411890e35a771d400dc1/FLAG9501d9a0d [2020-10-09 15:15:46,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a198da0f8/dfb62e2b3406411890e35a771d400dc1 [2020-10-09 15:15:46,191 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 15:15:46,192 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 15:15:46,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 15:15:46,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 15:15:46,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 15:15:46,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 03:15:46" (1/1) ... [2020-10-09 15:15:46,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c377e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:46, skipping insertion in model container [2020-10-09 15:15:46,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 03:15:46" (1/1) ... [2020-10-09 15:15:46,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 15:15:46,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 15:15:46,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 15:15:46,739 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 15:15:46,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 15:15:46,886 INFO L208 MainTranslator]: Completed translation [2020-10-09 15:15:46,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:46 WrapperNode [2020-10-09 15:15:46,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 15:15:46,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 15:15:46,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 15:15:46,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 15:15:46,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:46" (1/1) ... [2020-10-09 15:15:46,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:46" (1/1) ... [2020-10-09 15:15:46,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 15:15:46,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 15:15:46,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 15:15:46,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 15:15:46,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:46" (1/1) ... [2020-10-09 15:15:46,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:46" (1/1) ... [2020-10-09 15:15:46,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:46" (1/1) ... [2020-10-09 15:15:46,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:46" (1/1) ... [2020-10-09 15:15:46,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:46" (1/1) ... [2020-10-09 15:15:46,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:46" (1/1) ... [2020-10-09 15:15:46,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:46" (1/1) ... [2020-10-09 15:15:46,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 15:15:46,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 15:15:46,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 15:15:46,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 15:15:46,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:46" (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 15:15:47,027 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-09 15:15:47,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-09 15:15:47,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 15:15:47,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 15:15:47,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 15:15:47,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 15:15:47,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 15:15:47,030 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 15:15:47,386 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 15:15:47,387 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-10-09 15:15:47,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 03:15:47 BoogieIcfgContainer [2020-10-09 15:15:47,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 15:15:47,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 15:15:47,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 15:15:47,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 15:15:47,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 03:15:46" (1/3) ... [2020-10-09 15:15:47,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f88d0d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 03:15:47, skipping insertion in model container [2020-10-09 15:15:47,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 03:15:46" (2/3) ... [2020-10-09 15:15:47,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f88d0d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 03:15:47, skipping insertion in model container [2020-10-09 15:15:47,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 03:15:47" (3/3) ... [2020-10-09 15:15:47,397 INFO L111 eAbstractionObserver]: Analyzing ICFG 17_szymanski.i [2020-10-09 15:15:47,408 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 15:15:47,414 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-09 15:15:47,415 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 15:15:47,438 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:47,438 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:47,438 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:47,439 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:47,439 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:47,440 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:47,444 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:47,444 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:47,445 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:47,445 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 15:15:47,468 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 15:15:47,489 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 15:15:47,489 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 15:15:47,489 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 15:15:47,490 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 15:15:47,490 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 15:15:47,490 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 15:15:47,490 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 15:15:47,490 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 15:15:47,504 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 62 places, 82 transitions, 169 flow [2020-10-09 15:15:47,546 INFO L129 PetriNetUnfolder]: 24/81 cut-off events. [2020-10-09 15:15:47,546 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 15:15:47,553 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 81 events. 24/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 70. Up to 3 conditions per place. [2020-10-09 15:15:47,554 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 82 transitions, 169 flow [2020-10-09 15:15:47,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 81 transitions, 165 flow [2020-10-09 15:15:47,582 INFO L129 PetriNetUnfolder]: 19/65 cut-off events. [2020-10-09 15:15:47,582 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 15:15:47,582 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:15:47,583 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] [2020-10-09 15:15:47,584 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:15:47,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:15:47,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1601843613, now seen corresponding path program 1 times [2020-10-09 15:15:47,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:15:47,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659209297] [2020-10-09 15:15:47,605 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 15:15:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 15:15:47,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 15:15:47,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:15:47,710 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 15:15:47,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:15:47,717 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 15:15:47,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659209297] [2020-10-09 15:15:47,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:15:47,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 15:15:47,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14504379] [2020-10-09 15:15:47,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 15:15:47,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:15:47,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 15:15:47,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 15:15:47,752 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 82 [2020-10-09 15:15:47,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 81 transitions, 165 flow. Second operand 2 states. [2020-10-09 15:15:47,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:15:47,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 82 [2020-10-09 15:15:47,756 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:15:47,778 INFO L129 PetriNetUnfolder]: 12/57 cut-off events. [2020-10-09 15:15:47,779 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 15:15:47,783 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 57 events. 12/57 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 12/57 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2020-10-09 15:15:47,785 INFO L132 encePairwiseOnDemand]: 68/82 looper letters, 0 selfloop transitions, 0 changer transitions 0/57 dead transitions. [2020-10-09 15:15:47,785 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 117 flow [2020-10-09 15:15:47,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 15:15:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 15:15:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 150 transitions. [2020-10-09 15:15:47,801 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9146341463414634 [2020-10-09 15:15:47,802 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 150 transitions. [2020-10-09 15:15:47,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 150 transitions. [2020-10-09 15:15:47,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:15:47,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 150 transitions. [2020-10-09 15:15:47,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 15:15:47,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 15:15:47,816 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 15:15:47,819 INFO L185 Difference]: Start difference. First operand has 61 places, 81 transitions, 165 flow. Second operand 2 states and 150 transitions. [2020-10-09 15:15:47,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 117 flow [2020-10-09 15:15:47,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 15:15:47,828 INFO L241 Difference]: Finished difference. Result has 49 places, 57 transitions, 116 flow [2020-10-09 15:15:47,832 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=57} [2020-10-09 15:15:47,833 INFO L341 CegarLoopForPetriNet]: 61 programPoint places, -12 predicate places. [2020-10-09 15:15:47,833 INFO L481 AbstractCegarLoop]: Abstraction has has 49 places, 57 transitions, 116 flow [2020-10-09 15:15:47,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 15:15:47,833 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:15:47,833 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] [2020-10-09 15:15:48,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 15:15:48,050 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:15:48,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:15:48,051 INFO L82 PathProgramCache]: Analyzing trace with hash -950283557, now seen corresponding path program 1 times [2020-10-09 15:15:48,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:15:48,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525469203] [2020-10-09 15:15:48,053 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 15:15:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 15:15:48,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 15:15:48,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:15:48,134 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 15:15:48,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:15:48,139 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 15:15:48,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525469203] [2020-10-09 15:15:48,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:15:48,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-09 15:15:48,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796858763] [2020-10-09 15:15:48,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 15:15:48,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:15:48,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 15:15:48,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 15:15:48,177 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2020-10-09 15:15:48,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 57 transitions, 116 flow. Second operand 3 states. [2020-10-09 15:15:48,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:15:48,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2020-10-09 15:15:48,179 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:15:48,231 INFO L129 PetriNetUnfolder]: 56/180 cut-off events. [2020-10-09 15:15:48,232 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 15:15:48,234 INFO L80 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 180 events. 56/180 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 480 event pairs, 3 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 217. Up to 20 conditions per place. [2020-10-09 15:15:48,236 INFO L132 encePairwiseOnDemand]: 75/82 looper letters, 6 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2020-10-09 15:15:48,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 146 flow [2020-10-09 15:15:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 15:15:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 15:15:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2020-10-09 15:15:48,240 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7967479674796748 [2020-10-09 15:15:48,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2020-10-09 15:15:48,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2020-10-09 15:15:48,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:15:48,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2020-10-09 15:15:48,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 15:15:48,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 15:15:48,245 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 15:15:48,246 INFO L185 Difference]: Start difference. First operand has 49 places, 57 transitions, 116 flow. Second operand 3 states and 196 transitions. [2020-10-09 15:15:48,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 146 flow [2020-10-09 15:15:48,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 146 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 15:15:48,251 INFO L241 Difference]: Finished difference. Result has 53 places, 61 transitions, 156 flow [2020-10-09 15:15:48,252 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=53, PETRI_TRANSITIONS=61} [2020-10-09 15:15:48,253 INFO L341 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2020-10-09 15:15:48,253 INFO L481 AbstractCegarLoop]: Abstraction has has 53 places, 61 transitions, 156 flow [2020-10-09 15:15:48,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 15:15:48,253 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:15:48,254 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] [2020-10-09 15:15:48,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 15:15:48,461 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:15:48,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:15:48,462 INFO L82 PathProgramCache]: Analyzing trace with hash -260491045, now seen corresponding path program 1 times [2020-10-09 15:15:48,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:15:48,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030215209] [2020-10-09 15:15:48,464 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 15:15:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 15:15:48,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 15:15:48,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:15:48,548 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 15:15:48,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:15:48,557 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 15:15:48,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030215209] [2020-10-09 15:15:48,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:15:48,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-09 15:15:48,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938973874] [2020-10-09 15:15:48,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 15:15:48,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:15:48,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 15:15:48,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 15:15:48,604 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2020-10-09 15:15:48,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 61 transitions, 156 flow. Second operand 3 states. [2020-10-09 15:15:48,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:15:48,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2020-10-09 15:15:48,605 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:15:48,671 INFO L129 PetriNetUnfolder]: 46/157 cut-off events. [2020-10-09 15:15:48,672 INFO L130 PetriNetUnfolder]: For 27/39 co-relation queries the response was YES. [2020-10-09 15:15:48,675 INFO L80 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 157 events. 46/157 cut-off events. For 27/39 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 383 event pairs, 2 based on Foata normal form. 8/127 useless extension candidates. Maximal degree in co-relation 223. Up to 16 conditions per place. [2020-10-09 15:15:48,678 INFO L132 encePairwiseOnDemand]: 78/82 looper letters, 7 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2020-10-09 15:15:48,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 162 flow [2020-10-09 15:15:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 15:15:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 15:15:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2020-10-09 15:15:48,685 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7886178861788617 [2020-10-09 15:15:48,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2020-10-09 15:15:48,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2020-10-09 15:15:48,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:15:48,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2020-10-09 15:15:48,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 15:15:48,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 15:15:48,693 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 15:15:48,693 INFO L185 Difference]: Start difference. First operand has 53 places, 61 transitions, 156 flow. Second operand 3 states and 194 transitions. [2020-10-09 15:15:48,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 162 flow [2020-10-09 15:15:48,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 15:15:48,701 INFO L241 Difference]: Finished difference. Result has 53 places, 59 transitions, 142 flow [2020-10-09 15:15:48,702 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=53, PETRI_TRANSITIONS=59} [2020-10-09 15:15:48,702 INFO L341 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2020-10-09 15:15:48,702 INFO L481 AbstractCegarLoop]: Abstraction has has 53 places, 59 transitions, 142 flow [2020-10-09 15:15:48,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 15:15:48,702 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:15:48,703 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] [2020-10-09 15:15:48,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 15:15:48,922 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:15:48,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:15:48,922 INFO L82 PathProgramCache]: Analyzing trace with hash -609098235, now seen corresponding path program 1 times [2020-10-09 15:15:48,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:15:48,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465180151] [2020-10-09 15:15:48,924 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 15:15:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 15:15:48,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 15:15:48,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:15:49,006 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 15:15:49,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:15:49,020 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 15:15:49,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465180151] [2020-10-09 15:15:49,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:15:49,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-09 15:15:49,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534730920] [2020-10-09 15:15:49,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 15:15:49,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:15:49,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 15:15:49,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 15:15:49,149 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 82 [2020-10-09 15:15:49,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 59 transitions, 142 flow. Second operand 4 states. [2020-10-09 15:15:49,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:15:49,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 82 [2020-10-09 15:15:49,150 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:15:49,239 INFO L129 PetriNetUnfolder]: 188/477 cut-off events. [2020-10-09 15:15:49,239 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2020-10-09 15:15:49,243 INFO L80 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 477 events. 188/477 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2042 event pairs, 23 based on Foata normal form. 21/415 useless extension candidates. Maximal degree in co-relation 750. Up to 96 conditions per place. [2020-10-09 15:15:49,247 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 14 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2020-10-09 15:15:49,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 224 flow [2020-10-09 15:15:49,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 15:15:49,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-09 15:15:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 254 transitions. [2020-10-09 15:15:49,250 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.774390243902439 [2020-10-09 15:15:49,250 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 254 transitions. [2020-10-09 15:15:49,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 254 transitions. [2020-10-09 15:15:49,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:15:49,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 254 transitions. [2020-10-09 15:15:49,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-09 15:15:49,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-09 15:15:49,253 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-09 15:15:49,253 INFO L185 Difference]: Start difference. First operand has 53 places, 59 transitions, 142 flow. Second operand 4 states and 254 transitions. [2020-10-09 15:15:49,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 224 flow [2020-10-09 15:15:49,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 15:15:49,258 INFO L241 Difference]: Finished difference. Result has 58 places, 70 transitions, 240 flow [2020-10-09 15:15:49,258 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=58, PETRI_TRANSITIONS=70} [2020-10-09 15:15:49,258 INFO L341 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2020-10-09 15:15:49,259 INFO L481 AbstractCegarLoop]: Abstraction has has 58 places, 70 transitions, 240 flow [2020-10-09 15:15:49,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 15:15:49,259 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:15:49,259 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] [2020-10-09 15:15:49,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 15:15:49,471 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:15:49,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:15:49,471 INFO L82 PathProgramCache]: Analyzing trace with hash 233426503, now seen corresponding path program 2 times [2020-10-09 15:15:49,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:15:49,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844495433] [2020-10-09 15:15:49,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 15:15:49,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 15:15:49,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 15:15:49,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-09 15:15:49,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:15:49,542 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 15:15:49,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:15:49,552 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 15:15:49,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844495433] [2020-10-09 15:15:49,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:15:49,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-09 15:15:49,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169558237] [2020-10-09 15:15:49,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 15:15:49,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:15:49,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 15:15:49,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 15:15:49,644 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 82 [2020-10-09 15:15:49,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 70 transitions, 240 flow. Second operand 3 states. [2020-10-09 15:15:49,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:15:49,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 82 [2020-10-09 15:15:49,645 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:15:49,702 INFO L129 PetriNetUnfolder]: 185/464 cut-off events. [2020-10-09 15:15:49,702 INFO L130 PetriNetUnfolder]: For 377/393 co-relation queries the response was YES. [2020-10-09 15:15:49,705 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 464 events. 185/464 cut-off events. For 377/393 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1931 event pairs, 22 based on Foata normal form. 26/417 useless extension candidates. Maximal degree in co-relation 1045. Up to 164 conditions per place. [2020-10-09 15:15:49,709 INFO L132 encePairwiseOnDemand]: 73/82 looper letters, 17 selfloop transitions, 6 changer transitions 0/71 dead transitions. [2020-10-09 15:15:49,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 292 flow [2020-10-09 15:15:49,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 15:15:49,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-09 15:15:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2020-10-09 15:15:49,712 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7642276422764228 [2020-10-09 15:15:49,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2020-10-09 15:15:49,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2020-10-09 15:15:49,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:15:49,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2020-10-09 15:15:49,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-09 15:15:49,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-09 15:15:49,714 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-09 15:15:49,714 INFO L185 Difference]: Start difference. First operand has 58 places, 70 transitions, 240 flow. Second operand 3 states and 188 transitions. [2020-10-09 15:15:49,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 292 flow [2020-10-09 15:15:49,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 292 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 15:15:49,719 INFO L241 Difference]: Finished difference. Result has 62 places, 71 transitions, 286 flow [2020-10-09 15:15:49,720 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=62, PETRI_TRANSITIONS=71} [2020-10-09 15:15:49,720 INFO L341 CegarLoopForPetriNet]: 61 programPoint places, 1 predicate places. [2020-10-09 15:15:49,720 INFO L481 AbstractCegarLoop]: Abstraction has has 62 places, 71 transitions, 286 flow [2020-10-09 15:15:49,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 15:15:49,720 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 15:15:49,721 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] [2020-10-09 15:15:49,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 15:15:49,934 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 15:15:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 15:15:49,935 INFO L82 PathProgramCache]: Analyzing trace with hash -66054085, now seen corresponding path program 3 times [2020-10-09 15:15:49,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 15:15:49,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360263023] [2020-10-09 15:15:49,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 15:15:49,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-10-09 15:15:49,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 15:15:49,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 15:15:49,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 15:15:49,984 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 15:15:49,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 15:15:49,997 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 15:15:49,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360263023] [2020-10-09 15:15:49,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 15:15:49,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-09 15:15:49,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394979972] [2020-10-09 15:15:49,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 15:15:49,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 15:15:50,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 15:15:50,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 15:15:50,112 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 82 [2020-10-09 15:15:50,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 71 transitions, 286 flow. Second operand 4 states. [2020-10-09 15:15:50,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 15:15:50,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 82 [2020-10-09 15:15:50,113 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 15:15:50,209 INFO L129 PetriNetUnfolder]: 253/567 cut-off events. [2020-10-09 15:15:50,209 INFO L130 PetriNetUnfolder]: For 389/414 co-relation queries the response was YES. [2020-10-09 15:15:50,216 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 567 events. 253/567 cut-off events. For 389/414 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2334 event pairs, 19 based on Foata normal form. 47/571 useless extension candidates. Maximal degree in co-relation 1317. Up to 108 conditions per place. [2020-10-09 15:15:50,217 INFO L132 encePairwiseOnDemand]: 70/82 looper letters, 0 selfloop transitions, 0 changer transitions 81/81 dead transitions. [2020-10-09 15:15:50,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 356 flow [2020-10-09 15:15:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 15:15:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-09 15:15:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 254 transitions. [2020-10-09 15:15:50,221 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.774390243902439 [2020-10-09 15:15:50,221 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 254 transitions. [2020-10-09 15:15:50,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 254 transitions. [2020-10-09 15:15:50,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 15:15:50,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 254 transitions. [2020-10-09 15:15:50,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-09 15:15:50,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-09 15:15:50,224 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-09 15:15:50,224 INFO L185 Difference]: Start difference. First operand has 62 places, 71 transitions, 286 flow. Second operand 4 states and 254 transitions. [2020-10-09 15:15:50,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 356 flow [2020-10-09 15:15:50,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 81 transitions, 338 flow, removed 3 selfloop flow, removed 2 redundant places. [2020-10-09 15:15:50,236 INFO L241 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2020-10-09 15:15:50,236 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=56, 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=4, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2020-10-09 15:15:50,236 INFO L341 CegarLoopForPetriNet]: 61 programPoint places, -2 predicate places. [2020-10-09 15:15:50,237 INFO L481 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2020-10-09 15:15:50,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 15:15:50,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 15:15:50,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 03:15:50 BasicIcfg [2020-10-09 15:15:50,457 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 15:15:50,460 INFO L168 Benchmark]: Toolchain (without parser) took 4267.20 ms. Allocated memory was 248.0 MB in the beginning and 354.4 MB in the end (delta: 106.4 MB). Free memory was 203.3 MB in the beginning and 157.8 MB in the end (delta: 45.5 MB). Peak memory consumption was 151.9 MB. Max. memory is 14.2 GB. [2020-10-09 15:15:50,461 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 248.0 MB. Free memory is still 224.4 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 15:15:50,462 INFO L168 Benchmark]: CACSL2BoogieTranslator took 694.79 ms. Allocated memory was 248.0 MB in the beginning and 304.1 MB in the end (delta: 56.1 MB). Free memory was 203.3 MB in the beginning and 262.0 MB in the end (delta: -58.7 MB). Peak memory consumption was 32.9 MB. Max. memory is 14.2 GB. [2020-10-09 15:15:50,463 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.61 ms. Allocated memory is still 304.1 MB. Free memory was 262.0 MB in the beginning and 259.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 15:15:50,464 INFO L168 Benchmark]: Boogie Preprocessor took 29.10 ms. Allocated memory is still 304.1 MB. Free memory was 259.5 MB in the beginning and 257.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 15:15:50,465 INFO L168 Benchmark]: RCFGBuilder took 423.32 ms. Allocated memory is still 304.1 MB. Free memory was 257.0 MB in the beginning and 235.1 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.2 GB. [2020-10-09 15:15:50,466 INFO L168 Benchmark]: TraceAbstraction took 3067.57 ms. Allocated memory was 304.1 MB in the beginning and 354.4 MB in the end (delta: 50.3 MB). Free memory was 235.1 MB in the beginning and 157.8 MB in the end (delta: 77.2 MB). Peak memory consumption was 127.6 MB. Max. memory is 14.2 GB. [2020-10-09 15:15:50,470 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 248.0 MB. Free memory is still 224.4 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 694.79 ms. Allocated memory was 248.0 MB in the beginning and 304.1 MB in the end (delta: 56.1 MB). Free memory was 203.3 MB in the beginning and 262.0 MB in the end (delta: -58.7 MB). Peak memory consumption was 32.9 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 46.61 ms. Allocated memory is still 304.1 MB. Free memory was 262.0 MB in the beginning and 259.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 29.10 ms. Allocated memory is still 304.1 MB. Free memory was 259.5 MB in the beginning and 257.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 423.32 ms. Allocated memory is still 304.1 MB. Free memory was 257.0 MB in the beginning and 235.1 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 3067.57 ms. Allocated memory was 304.1 MB in the beginning and 354.4 MB in the end (delta: 50.3 MB). Free memory was 235.1 MB in the beginning and 157.8 MB in the end (delta: 77.2 MB). Peak memory consumption was 127.6 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 687]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 705]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 59 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2.9s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 44 SDslu, 0 SDs, 0 SdLazy, 127 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 338 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=286occurred in iteration=5, 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: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 338 ConstructedInterpolants, 0 QuantifiedInterpolants, 12582 SizeOfPredicates, 2 NumberOfNonLiveVariables, 370 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...