/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/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf -i ../../../trunk/examples/svcomp/pthread-nondet/nondet-array-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 05:56:21,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 05:56:21,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 05:56:21,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 05:56:21,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 05:56:21,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 05:56:21,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 05:56:21,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 05:56:21,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 05:56:21,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 05:56:21,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 05:56:21,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 05:56:21,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 05:56:21,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 05:56:21,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 05:56:21,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 05:56:21,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 05:56:21,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 05:56:21,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 05:56:21,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 05:56:21,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 05:56:21,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 05:56:21,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 05:56:21,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 05:56:21,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 05:56:21,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 05:56:21,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 05:56:21,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 05:56:21,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 05:56:21,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 05:56:21,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 05:56:21,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 05:56:21,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 05:56:21,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 05:56:21,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 05:56:21,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 05:56:21,535 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf [2020-10-16 05:56:21,559 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 05:56:21,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 05:56:21,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 05:56:21,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 05:56:21,561 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 05:56:21,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 05:56:21,562 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 05:56:21,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 05:56:21,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 05:56:21,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 05:56:21,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 05:56:21,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 05:56:21,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 05:56:21,563 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 05:56:21,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 05:56:21,563 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 05:56:21,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 05:56:21,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 05:56:21,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 05:56:21,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 05:56:21,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 05:56:21,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 05:56:21,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 05:56:21,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 05:56:21,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 05:56:21,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 05:56:21,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 05:56:21,566 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 05:56:21,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 05:56:21,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 05:56:21,868 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 05:56:21,873 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 05:56:21,874 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 05:56:21,875 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 05:56:21,875 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-nondet/nondet-array-1.i [2020-10-16 05:56:21,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c565e2784/f4449ac2b9924aed8c70c91251d76224/FLAG9d610182b [2020-10-16 05:56:22,403 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 05:56:22,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-nondet/nondet-array-1.i [2020-10-16 05:56:22,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c565e2784/f4449ac2b9924aed8c70c91251d76224/FLAG9d610182b [2020-10-16 05:56:22,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c565e2784/f4449ac2b9924aed8c70c91251d76224 [2020-10-16 05:56:22,686 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 05:56:22,688 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 05:56:22,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 05:56:22,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 05:56:22,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 05:56:22,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:56:22" (1/1) ... [2020-10-16 05:56:22,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20784703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:22, skipping insertion in model container [2020-10-16 05:56:22,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:56:22" (1/1) ... [2020-10-16 05:56:22,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 05:56:22,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 05:56:23,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 05:56:23,146 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 05:56:23,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 05:56:23,262 INFO L208 MainTranslator]: Completed translation [2020-10-16 05:56:23,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:23 WrapperNode [2020-10-16 05:56:23,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 05:56:23,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 05:56:23,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 05:56:23,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 05:56:23,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:23" (1/1) ... [2020-10-16 05:56:23,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:23" (1/1) ... [2020-10-16 05:56:23,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 05:56:23,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 05:56:23,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 05:56:23,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 05:56:23,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:23" (1/1) ... [2020-10-16 05:56:23,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:23" (1/1) ... [2020-10-16 05:56:23,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:23" (1/1) ... [2020-10-16 05:56:23,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:23" (1/1) ... [2020-10-16 05:56:23,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:23" (1/1) ... [2020-10-16 05:56:23,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:23" (1/1) ... [2020-10-16 05:56:23,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:23" (1/1) ... [2020-10-16 05:56:23,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 05:56:23,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 05:56:23,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 05:56:23,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 05:56:23,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:23" (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 [2020-10-16 05:56:23,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-10-16 05:56:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 05:56:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 05:56:23,409 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2020-10-16 05:56:23,410 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2020-10-16 05:56:23,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 05:56:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 05:56:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 05:56:23,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 05:56:23,413 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 05:56:23,737 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 05:56:23,738 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-16 05:56:23,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:56:23 BoogieIcfgContainer [2020-10-16 05:56:23,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 05:56:23,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 05:56:23,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 05:56:23,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 05:56:23,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:56:22" (1/3) ... [2020-10-16 05:56:23,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a73d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:56:23, skipping insertion in model container [2020-10-16 05:56:23,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:23" (2/3) ... [2020-10-16 05:56:23,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a73d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:56:23, skipping insertion in model container [2020-10-16 05:56:23,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:56:23" (3/3) ... [2020-10-16 05:56:23,748 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-array-1.i [2020-10-16 05:56:23,758 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 05:56:23,765 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 05:56:23,766 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 05:56:23,790 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:23,790 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:23,790 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:23,790 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:23,791 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:23,791 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:23,791 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:23,795 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:23,795 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:23,795 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:23,796 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:23,796 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:23,818 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:23,839 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:23,839 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:23,839 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:23,839 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:23,839 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:23,840 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:23,840 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:23,840 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:23,853 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 71 transitions, 150 flow [2020-10-16 05:56:23,904 INFO L129 PetriNetUnfolder]: 12/103 cut-off events. [2020-10-16 05:56:23,904 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 05:56:23,908 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. [2020-10-16 05:56:23,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 71 transitions, 150 flow [2020-10-16 05:56:23,914 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 64 transitions, 136 flow [2020-10-16 05:56:23,917 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:23,919 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 64 transitions, 136 flow [2020-10-16 05:56:23,922 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 61 places, 64 transitions, 136 flow [2020-10-16 05:56:23,922 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 64 transitions, 136 flow [2020-10-16 05:56:23,962 INFO L129 PetriNetUnfolder]: 10/89 cut-off events. [2020-10-16 05:56:23,962 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 05:56:23,964 INFO L80 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 89 events. 10/89 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 157 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2020-10-16 05:56:23,967 INFO L117 LiptonReduction]: Number of co-enabled transitions 300 [2020-10-16 05:56:25,329 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 05:56:25,404 INFO L132 LiptonReduction]: Checked pairs total: 320 [2020-10-16 05:56:25,405 INFO L134 LiptonReduction]: Total number of compositions: 56 [2020-10-16 05:56:25,407 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1492 [2020-10-16 05:56:25,413 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 05:56:25,413 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:25,413 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:25,414 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:25,415 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash 8319830, now seen corresponding path program 1 times [2020-10-16 05:56:25,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:25,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348668958] [2020-10-16 05:56:25,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:25,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348668958] [2020-10-16 05:56:25,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:25,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:25,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125436099] [2020-10-16 05:56:25,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:25,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:25,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:25,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:25,696 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 127 [2020-10-16 05:56:25,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 13 transitions, 34 flow. Second operand 3 states. [2020-10-16 05:56:25,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:25,699 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 127 [2020-10-16 05:56:25,700 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:25,732 INFO L129 PetriNetUnfolder]: 2/18 cut-off events. [2020-10-16 05:56:25,733 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 05:56:25,733 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 18 events. 2/18 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 16. Up to 13 conditions per place. [2020-10-16 05:56:25,734 INFO L132 encePairwiseOnDemand]: 124/127 looper letters, 8 selfloop transitions, 2 changer transitions 0/14 dead transitions. [2020-10-16 05:56:25,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 14 transitions, 56 flow [2020-10-16 05:56:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:25,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2020-10-16 05:56:25,751 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5013123359580053 [2020-10-16 05:56:25,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 191 transitions. [2020-10-16 05:56:25,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 191 transitions. [2020-10-16 05:56:25,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:25,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 191 transitions. [2020-10-16 05:56:25,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:25,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:25,766 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:25,769 INFO L185 Difference]: Start difference. First operand has 14 places, 13 transitions, 34 flow. Second operand 3 states and 191 transitions. [2020-10-16 05:56:25,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 14 transitions, 56 flow [2020-10-16 05:56:25,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 14 transitions, 56 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:25,774 INFO L241 Difference]: Finished difference. Result has 17 places, 13 transitions, 42 flow [2020-10-16 05:56:25,777 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=17, PETRI_TRANSITIONS=13} [2020-10-16 05:56:25,778 INFO L342 CegarLoopForPetriNet]: 14 programPoint places, 3 predicate places. [2020-10-16 05:56:25,778 INFO L481 AbstractCegarLoop]: Abstraction has has 17 places, 13 transitions, 42 flow [2020-10-16 05:56:25,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:25,779 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:25,779 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2020-10-16 05:56:25,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 05:56:25,779 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:25,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:25,780 INFO L82 PathProgramCache]: Analyzing trace with hash -603160687, now seen corresponding path program 1 times [2020-10-16 05:56:25,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:25,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618265762] [2020-10-16 05:56:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:25,819 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:25,838 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:25,860 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:25,860 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:25,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 05:56:25,862 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:25,864 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:25,864 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-16 05:56:25,871 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,871 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,871 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,872 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,872 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,872 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,872 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,873 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,873 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,873 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,873 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,873 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,874 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,874 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,875 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,875 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,875 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,875 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,875 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,877 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,878 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,878 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,878 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,878 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:25,882 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:25,882 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:25,882 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:25,882 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:25,883 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:25,883 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:25,883 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:25,883 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:25,883 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:25,898 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2020-10-16 05:56:25,928 INFO L129 PetriNetUnfolder]: 23/183 cut-off events. [2020-10-16 05:56:25,928 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 05:56:25,929 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 462 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. [2020-10-16 05:56:25,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 78 transitions, 174 flow [2020-10-16 05:56:25,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 71 transitions, 160 flow [2020-10-16 05:56:25,931 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:25,931 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 71 transitions, 160 flow [2020-10-16 05:56:25,931 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 71 transitions, 160 flow [2020-10-16 05:56:25,931 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 69 places, 71 transitions, 160 flow [2020-10-16 05:56:25,966 INFO L129 PetriNetUnfolder]: 19/155 cut-off events. [2020-10-16 05:56:25,967 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 05:56:25,967 INFO L80 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 155 events. 19/155 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 366 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 91. Up to 8 conditions per place. [2020-10-16 05:56:25,970 INFO L117 LiptonReduction]: Number of co-enabled transitions 760 [2020-10-16 05:56:26,970 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-16 05:56:27,268 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 05:56:27,274 INFO L132 LiptonReduction]: Checked pairs total: 1958 [2020-10-16 05:56:27,274 INFO L134 LiptonReduction]: Total number of compositions: 54 [2020-10-16 05:56:27,275 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1344 [2020-10-16 05:56:27,277 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 05:56:27,277 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:27,277 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:27,277 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:27,277 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:27,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:27,278 INFO L82 PathProgramCache]: Analyzing trace with hash 12600976, now seen corresponding path program 1 times [2020-10-16 05:56:27,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:27,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921526718] [2020-10-16 05:56:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:27,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921526718] [2020-10-16 05:56:27,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:27,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:27,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636812729] [2020-10-16 05:56:27,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:27,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:27,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:27,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:27,320 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 132 [2020-10-16 05:56:27,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 22 transitions, 62 flow. Second operand 3 states. [2020-10-16 05:56:27,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:27,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 132 [2020-10-16 05:56:27,320 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:27,347 INFO L129 PetriNetUnfolder]: 6/45 cut-off events. [2020-10-16 05:56:27,347 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 05:56:27,348 INFO L80 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 45 events. 6/45 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 45. Up to 26 conditions per place. [2020-10-16 05:56:27,349 INFO L132 encePairwiseOnDemand]: 129/132 looper letters, 9 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2020-10-16 05:56:27,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 24 transitions, 88 flow [2020-10-16 05:56:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:27,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2020-10-16 05:56:27,352 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2020-10-16 05:56:27,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2020-10-16 05:56:27,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2020-10-16 05:56:27,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:27,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2020-10-16 05:56:27,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:27,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:27,355 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:27,356 INFO L185 Difference]: Start difference. First operand has 24 places, 22 transitions, 62 flow. Second operand 3 states and 213 transitions. [2020-10-16 05:56:27,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 24 transitions, 88 flow [2020-10-16 05:56:27,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:27,357 INFO L241 Difference]: Finished difference. Result has 27 places, 23 transitions, 74 flow [2020-10-16 05:56:27,358 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2020-10-16 05:56:27,358 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2020-10-16 05:56:27,358 INFO L481 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 74 flow [2020-10-16 05:56:27,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:27,358 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:27,358 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:27,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 05:56:27,359 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:27,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:27,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1920961359, now seen corresponding path program 1 times [2020-10-16 05:56:27,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:27,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230577426] [2020-10-16 05:56:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:27,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230577426] [2020-10-16 05:56:27,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:27,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:27,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522159700] [2020-10-16 05:56:27,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:27,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:27,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:27,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:27,438 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 132 [2020-10-16 05:56:27,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 74 flow. Second operand 4 states. [2020-10-16 05:56:27,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:27,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 132 [2020-10-16 05:56:27,439 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:27,474 INFO L129 PetriNetUnfolder]: 5/49 cut-off events. [2020-10-16 05:56:27,475 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2020-10-16 05:56:27,475 INFO L80 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 49 events. 5/49 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 1 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 83. Up to 20 conditions per place. [2020-10-16 05:56:27,476 INFO L132 encePairwiseOnDemand]: 125/132 looper letters, 8 selfloop transitions, 6 changer transitions 0/27 dead transitions. [2020-10-16 05:56:27,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 110 flow [2020-10-16 05:56:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 284 transitions. [2020-10-16 05:56:27,485 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2020-10-16 05:56:27,485 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 284 transitions. [2020-10-16 05:56:27,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 284 transitions. [2020-10-16 05:56:27,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:27,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 284 transitions. [2020-10-16 05:56:27,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:27,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:27,488 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:27,489 INFO L185 Difference]: Start difference. First operand has 27 places, 23 transitions, 74 flow. Second operand 4 states and 284 transitions. [2020-10-16 05:56:27,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 110 flow [2020-10-16 05:56:27,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:27,491 INFO L241 Difference]: Finished difference. Result has 30 places, 25 transitions, 100 flow [2020-10-16 05:56:27,491 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2020-10-16 05:56:27,492 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 6 predicate places. [2020-10-16 05:56:27,492 INFO L481 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 100 flow [2020-10-16 05:56:27,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:27,492 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:27,492 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2020-10-16 05:56:27,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 05:56:27,493 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:27,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:27,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1347590472, now seen corresponding path program 1 times [2020-10-16 05:56:27,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:27,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463263506] [2020-10-16 05:56:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:27,511 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:27,524 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:27,530 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:27,530 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:27,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 05:56:27,531 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:27,531 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:27,532 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-16 05:56:27,539 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,539 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,539 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,539 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,539 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,540 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,540 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,540 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,540 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,541 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,541 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,541 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,541 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,541 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,541 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,542 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,542 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,542 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,542 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,542 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,542 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,543 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,543 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,543 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,543 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,544 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,547 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,547 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,547 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,547 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,547 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,548 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,549 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,549 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,549 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,549 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:27,552 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:27,552 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:27,552 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:27,552 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:27,552 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:27,552 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:27,553 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:27,553 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:27,553 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:27,555 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 200 flow [2020-10-16 05:56:27,584 INFO L129 PetriNetUnfolder]: 45/330 cut-off events. [2020-10-16 05:56:27,585 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 05:56:27,586 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 1084 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. [2020-10-16 05:56:27,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 85 transitions, 200 flow [2020-10-16 05:56:27,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 78 transitions, 186 flow [2020-10-16 05:56:27,588 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:27,588 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 78 transitions, 186 flow [2020-10-16 05:56:27,588 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 78 transitions, 186 flow [2020-10-16 05:56:27,588 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 77 places, 78 transitions, 186 flow [2020-10-16 05:56:27,610 INFO L129 PetriNetUnfolder]: 37/274 cut-off events. [2020-10-16 05:56:27,610 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 05:56:27,611 INFO L80 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 274 events. 37/274 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 784 event pairs, 1 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 163. Up to 16 conditions per place. [2020-10-16 05:56:27,614 INFO L117 LiptonReduction]: Number of co-enabled transitions 1260 [2020-10-16 05:56:28,795 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-16 05:56:29,085 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-16 05:56:29,195 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-16 05:56:29,342 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-16 05:56:29,402 INFO L132 LiptonReduction]: Checked pairs total: 3644 [2020-10-16 05:56:29,402 INFO L134 LiptonReduction]: Total number of compositions: 57 [2020-10-16 05:56:29,402 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1814 [2020-10-16 05:56:29,404 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 05:56:29,404 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:29,404 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:29,404 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:29,405 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:29,405 INFO L82 PathProgramCache]: Analyzing trace with hash 17184692, now seen corresponding path program 1 times [2020-10-16 05:56:29,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:29,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121834387] [2020-10-16 05:56:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:29,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121834387] [2020-10-16 05:56:29,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:29,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:29,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697158456] [2020-10-16 05:56:29,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:29,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:29,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:29,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:29,440 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 142 [2020-10-16 05:56:29,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 84 flow. Second operand 3 states. [2020-10-16 05:56:29,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:29,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 142 [2020-10-16 05:56:29,441 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:29,479 INFO L129 PetriNetUnfolder]: 15/85 cut-off events. [2020-10-16 05:56:29,479 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 05:56:29,480 INFO L80 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 85 events. 15/85 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 208 event pairs, 1 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 89. Up to 49 conditions per place. [2020-10-16 05:56:29,480 INFO L132 encePairwiseOnDemand]: 139/142 looper letters, 9 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2020-10-16 05:56:29,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 110 flow [2020-10-16 05:56:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:29,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2020-10-16 05:56:29,483 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5633802816901409 [2020-10-16 05:56:29,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2020-10-16 05:56:29,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2020-10-16 05:56:29,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:29,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2020-10-16 05:56:29,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:29,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:29,486 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:29,486 INFO L185 Difference]: Start difference. First operand has 30 places, 27 transitions, 84 flow. Second operand 3 states and 240 transitions. [2020-10-16 05:56:29,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 110 flow [2020-10-16 05:56:29,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:29,488 INFO L241 Difference]: Finished difference. Result has 33 places, 28 transitions, 96 flow [2020-10-16 05:56:29,488 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2020-10-16 05:56:29,489 INFO L342 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2020-10-16 05:56:29,489 INFO L481 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 96 flow [2020-10-16 05:56:29,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:29,489 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:29,489 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:29,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 05:56:29,489 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:29,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:29,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1206663488, now seen corresponding path program 1 times [2020-10-16 05:56:29,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:29,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132342468] [2020-10-16 05:56:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:29,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132342468] [2020-10-16 05:56:29,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:29,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:29,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475663019] [2020-10-16 05:56:29,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:29,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:29,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:29,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:29,528 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 142 [2020-10-16 05:56:29,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 96 flow. Second operand 4 states. [2020-10-16 05:56:29,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:29,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 142 [2020-10-16 05:56:29,529 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:29,564 INFO L129 PetriNetUnfolder]: 15/100 cut-off events. [2020-10-16 05:56:29,565 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2020-10-16 05:56:29,565 INFO L80 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 100 events. 15/100 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 280 event pairs, 4 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 181. Up to 44 conditions per place. [2020-10-16 05:56:29,566 INFO L132 encePairwiseOnDemand]: 135/142 looper letters, 8 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2020-10-16 05:56:29,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 132 flow [2020-10-16 05:56:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 320 transitions. [2020-10-16 05:56:29,568 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5633802816901409 [2020-10-16 05:56:29,568 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 320 transitions. [2020-10-16 05:56:29,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 320 transitions. [2020-10-16 05:56:29,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:29,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 320 transitions. [2020-10-16 05:56:29,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:29,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:29,571 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:29,571 INFO L185 Difference]: Start difference. First operand has 33 places, 28 transitions, 96 flow. Second operand 4 states and 320 transitions. [2020-10-16 05:56:29,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 132 flow [2020-10-16 05:56:29,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:29,573 INFO L241 Difference]: Finished difference. Result has 36 places, 30 transitions, 122 flow [2020-10-16 05:56:29,574 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2020-10-16 05:56:29,574 INFO L342 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2020-10-16 05:56:29,574 INFO L481 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 122 flow [2020-10-16 05:56:29,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:29,574 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:29,574 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2020-10-16 05:56:29,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 05:56:29,575 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:29,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:29,575 INFO L82 PathProgramCache]: Analyzing trace with hash 703601145, now seen corresponding path program 1 times [2020-10-16 05:56:29,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:29,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737592783] [2020-10-16 05:56:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:29,590 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:29,601 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:29,608 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:29,608 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:29,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-16 05:56:29,609 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:29,609 WARN L371 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:29,610 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-16 05:56:29,617 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,617 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,617 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,617 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,618 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,618 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,618 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,618 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,618 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,619 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,619 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,619 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,619 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,619 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,620 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,620 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,620 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,620 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,620 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,620 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,621 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,621 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,621 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,621 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,621 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,621 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,622 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,622 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,622 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,622 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,622 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,623 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,623 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,624 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,624 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,625 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,625 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,625 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,627 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,627 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,627 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,627 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,627 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,629 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,629 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,629 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,629 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,629 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:29,634 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:29,634 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:29,634 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:29,634 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:29,634 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:29,635 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:29,635 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:29,635 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:29,635 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:29,637 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 228 flow [2020-10-16 05:56:29,717 INFO L129 PetriNetUnfolder]: 91/613 cut-off events. [2020-10-16 05:56:29,717 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 05:56:29,719 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 2762 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. [2020-10-16 05:56:29,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 92 transitions, 228 flow [2020-10-16 05:56:29,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 85 transitions, 214 flow [2020-10-16 05:56:29,722 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:29,722 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 85 transitions, 214 flow [2020-10-16 05:56:29,723 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 85 transitions, 214 flow [2020-10-16 05:56:29,723 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 85 places, 85 transitions, 214 flow [2020-10-16 05:56:29,785 INFO L129 PetriNetUnfolder]: 75/501 cut-off events. [2020-10-16 05:56:29,785 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 05:56:29,787 INFO L80 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 501 events. 75/501 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2027 event pairs, 6 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 294. Up to 32 conditions per place. [2020-10-16 05:56:29,795 INFO L117 LiptonReduction]: Number of co-enabled transitions 1840 [2020-10-16 05:56:30,797 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-16 05:56:31,024 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 05:56:31,088 INFO L132 LiptonReduction]: Checked pairs total: 6546 [2020-10-16 05:56:31,089 INFO L134 LiptonReduction]: Total number of compositions: 59 [2020-10-16 05:56:31,089 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1367 [2020-10-16 05:56:31,091 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 05:56:31,091 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:31,091 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:31,091 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:31,091 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:31,092 INFO L82 PathProgramCache]: Analyzing trace with hash 22048377, now seen corresponding path program 1 times [2020-10-16 05:56:31,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:31,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752477967] [2020-10-16 05:56:31,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:31,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752477967] [2020-10-16 05:56:31,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:31,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:31,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260546998] [2020-10-16 05:56:31,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:31,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:31,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:31,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:31,114 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 151 [2020-10-16 05:56:31,114 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 108 flow. Second operand 3 states. [2020-10-16 05:56:31,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:31,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 151 [2020-10-16 05:56:31,115 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:31,147 INFO L129 PetriNetUnfolder]: 36/161 cut-off events. [2020-10-16 05:56:31,147 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 05:56:31,148 INFO L80 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 161 events. 36/161 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 514 event pairs, 6 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 166. Up to 92 conditions per place. [2020-10-16 05:56:31,149 INFO L132 encePairwiseOnDemand]: 148/151 looper letters, 9 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2020-10-16 05:56:31,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 134 flow [2020-10-16 05:56:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:31,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:31,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2020-10-16 05:56:31,151 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5761589403973509 [2020-10-16 05:56:31,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2020-10-16 05:56:31,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2020-10-16 05:56:31,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:31,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2020-10-16 05:56:31,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:31,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:31,154 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:31,154 INFO L185 Difference]: Start difference. First operand has 36 places, 32 transitions, 108 flow. Second operand 3 states and 261 transitions. [2020-10-16 05:56:31,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 134 flow [2020-10-16 05:56:31,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:31,156 INFO L241 Difference]: Finished difference. Result has 39 places, 33 transitions, 120 flow [2020-10-16 05:56:31,157 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2020-10-16 05:56:31,157 INFO L342 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2020-10-16 05:56:31,157 INFO L481 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 120 flow [2020-10-16 05:56:31,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:31,157 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:31,157 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:31,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 05:56:31,158 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:31,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:31,158 INFO L82 PathProgramCache]: Analyzing trace with hash -161501305, now seen corresponding path program 1 times [2020-10-16 05:56:31,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:31,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928503464] [2020-10-16 05:56:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:31,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928503464] [2020-10-16 05:56:31,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:31,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:31,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265672974] [2020-10-16 05:56:31,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:31,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:31,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:31,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:31,197 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 151 [2020-10-16 05:56:31,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 120 flow. Second operand 4 states. [2020-10-16 05:56:31,197 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:31,197 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 151 [2020-10-16 05:56:31,198 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:31,244 INFO L129 PetriNetUnfolder]: 38/194 cut-off events. [2020-10-16 05:56:31,245 INFO L130 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2020-10-16 05:56:31,245 INFO L80 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 194 events. 38/194 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 756 event pairs, 12 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 361. Up to 89 conditions per place. [2020-10-16 05:56:31,247 INFO L132 encePairwiseOnDemand]: 144/151 looper letters, 8 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2020-10-16 05:56:31,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 156 flow [2020-10-16 05:56:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2020-10-16 05:56:31,249 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5761589403973509 [2020-10-16 05:56:31,249 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 348 transitions. [2020-10-16 05:56:31,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 348 transitions. [2020-10-16 05:56:31,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:31,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 348 transitions. [2020-10-16 05:56:31,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:31,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:31,252 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:31,252 INFO L185 Difference]: Start difference. First operand has 39 places, 33 transitions, 120 flow. Second operand 4 states and 348 transitions. [2020-10-16 05:56:31,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 156 flow [2020-10-16 05:56:31,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:31,254 INFO L241 Difference]: Finished difference. Result has 42 places, 35 transitions, 146 flow [2020-10-16 05:56:31,255 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2020-10-16 05:56:31,255 INFO L342 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2020-10-16 05:56:31,255 INFO L481 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 146 flow [2020-10-16 05:56:31,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:31,255 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:31,255 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:31,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 05:56:31,256 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:31,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:31,256 INFO L82 PathProgramCache]: Analyzing trace with hash -582908876, now seen corresponding path program 1 times [2020-10-16 05:56:31,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:31,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065792955] [2020-10-16 05:56:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:31,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065792955] [2020-10-16 05:56:31,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115323838] [2020-10-16 05:56:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:31,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:56:31,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:31,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:31,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:56:31,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504641759] [2020-10-16 05:56:31,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:56:31,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:31,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:56:31,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:56:31,384 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 151 [2020-10-16 05:56:31,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 146 flow. Second operand 6 states. [2020-10-16 05:56:31,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:31,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 151 [2020-10-16 05:56:31,385 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:31,438 INFO L129 PetriNetUnfolder]: 37/189 cut-off events. [2020-10-16 05:56:31,438 INFO L130 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2020-10-16 05:56:31,439 INFO L80 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 189 events. 37/189 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 743 event pairs, 12 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 254. Up to 108 conditions per place. [2020-10-16 05:56:31,440 INFO L132 encePairwiseOnDemand]: 148/151 looper letters, 12 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2020-10-16 05:56:31,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 184 flow [2020-10-16 05:56:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2020-10-16 05:56:31,443 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5728476821192053 [2020-10-16 05:56:31,443 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 346 transitions. [2020-10-16 05:56:31,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 346 transitions. [2020-10-16 05:56:31,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:31,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 346 transitions. [2020-10-16 05:56:31,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:31,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:31,447 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:31,447 INFO L185 Difference]: Start difference. First operand has 42 places, 35 transitions, 146 flow. Second operand 4 states and 346 transitions. [2020-10-16 05:56:31,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 184 flow [2020-10-16 05:56:31,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:31,449 INFO L241 Difference]: Finished difference. Result has 45 places, 36 transitions, 161 flow [2020-10-16 05:56:31,450 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2020-10-16 05:56:31,450 INFO L342 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2020-10-16 05:56:31,450 INFO L481 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 161 flow [2020-10-16 05:56:31,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:56:31,450 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:31,451 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:31,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 05:56:31,665 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash -653450535, now seen corresponding path program 1 times [2020-10-16 05:56:31,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:31,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449657245] [2020-10-16 05:56:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:31,699 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:31,724 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:31,738 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:31,738 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:31,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-16 05:56:31,740 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:31,743 WARN L371 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:31,744 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-10-16 05:56:31,762 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,763 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,763 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,763 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,763 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,764 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,764 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,765 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,765 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,765 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,765 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,766 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,766 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,766 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,767 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,767 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,767 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,767 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,768 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,768 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,768 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,769 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,770 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,770 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,770 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,770 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,771 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,771 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,771 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,771 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,772 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,772 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,772 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,772 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,772 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,773 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,775 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,776 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,776 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,776 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,777 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,778 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,778 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,778 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,778 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,780 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,780 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,780 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,780 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,780 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,782 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,782 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,783 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,783 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,783 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,785 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,785 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,786 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,786 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,787 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:31,794 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:31,795 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:31,795 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:31,795 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:31,796 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:31,796 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:31,796 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:31,796 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:31,796 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:31,799 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 258 flow [2020-10-16 05:56:31,974 INFO L129 PetriNetUnfolder]: 189/1172 cut-off events. [2020-10-16 05:56:31,974 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 05:56:31,977 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 6756 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. [2020-10-16 05:56:31,977 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 99 transitions, 258 flow [2020-10-16 05:56:31,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 92 transitions, 244 flow [2020-10-16 05:56:31,982 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:31,982 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 92 transitions, 244 flow [2020-10-16 05:56:31,982 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 92 transitions, 244 flow [2020-10-16 05:56:31,982 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 92 transitions, 244 flow [2020-10-16 05:56:32,081 INFO L129 PetriNetUnfolder]: 157/948 cut-off events. [2020-10-16 05:56:32,082 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 05:56:32,084 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 948 events. 157/948 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4980 event pairs, 23 based on Foata normal form. 0/807 useless extension candidates. Maximal degree in co-relation 546. Up to 80 conditions per place. [2020-10-16 05:56:32,102 INFO L117 LiptonReduction]: Number of co-enabled transitions 2500 [2020-10-16 05:56:33,587 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-16 05:56:33,726 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 05:56:33,738 INFO L132 LiptonReduction]: Checked pairs total: 8810 [2020-10-16 05:56:33,739 INFO L134 LiptonReduction]: Total number of compositions: 59 [2020-10-16 05:56:33,739 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1757 [2020-10-16 05:56:33,741 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 05:56:33,741 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:33,741 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:33,741 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:33,741 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:33,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:33,742 INFO L82 PathProgramCache]: Analyzing trace with hash 27129011, now seen corresponding path program 1 times [2020-10-16 05:56:33,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:33,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140258861] [2020-10-16 05:56:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:33,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140258861] [2020-10-16 05:56:33,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:33,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:33,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736258747] [2020-10-16 05:56:33,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:33,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:33,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:33,766 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 05:56:33,766 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 134 flow. Second operand 3 states. [2020-10-16 05:56:33,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:33,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 05:56:33,767 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:33,820 INFO L129 PetriNetUnfolder]: 85/313 cut-off events. [2020-10-16 05:56:33,820 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 05:56:33,821 INFO L80 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 313 events. 85/313 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1219 event pairs, 23 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 312. Up to 175 conditions per place. [2020-10-16 05:56:33,822 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 9 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2020-10-16 05:56:33,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 160 flow [2020-10-16 05:56:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 294 transitions. [2020-10-16 05:56:33,824 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.620253164556962 [2020-10-16 05:56:33,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 294 transitions. [2020-10-16 05:56:33,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 294 transitions. [2020-10-16 05:56:33,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:33,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 294 transitions. [2020-10-16 05:56:33,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:33,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:33,827 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:33,827 INFO L185 Difference]: Start difference. First operand has 42 places, 37 transitions, 134 flow. Second operand 3 states and 294 transitions. [2020-10-16 05:56:33,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 160 flow [2020-10-16 05:56:33,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:33,830 INFO L241 Difference]: Finished difference. Result has 45 places, 38 transitions, 146 flow [2020-10-16 05:56:33,830 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2020-10-16 05:56:33,830 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2020-10-16 05:56:33,831 INFO L481 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 146 flow [2020-10-16 05:56:33,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:33,831 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:33,831 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:33,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-16 05:56:33,831 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:33,832 INFO L82 PathProgramCache]: Analyzing trace with hash -173965401, now seen corresponding path program 1 times [2020-10-16 05:56:33,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:33,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135181134] [2020-10-16 05:56:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:33,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135181134] [2020-10-16 05:56:33,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:33,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:33,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352950868] [2020-10-16 05:56:33,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:33,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:33,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:33,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:33,861 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 05:56:33,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 146 flow. Second operand 4 states. [2020-10-16 05:56:33,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:33,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 05:56:33,862 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:33,921 INFO L129 PetriNetUnfolder]: 90/375 cut-off events. [2020-10-16 05:56:33,921 INFO L130 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2020-10-16 05:56:33,922 INFO L80 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 375 events. 90/375 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1698 event pairs, 33 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 707. Up to 175 conditions per place. [2020-10-16 05:56:33,924 INFO L132 encePairwiseOnDemand]: 151/158 looper letters, 8 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2020-10-16 05:56:33,924 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 182 flow [2020-10-16 05:56:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:33,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:33,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 392 transitions. [2020-10-16 05:56:33,926 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.620253164556962 [2020-10-16 05:56:33,926 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 392 transitions. [2020-10-16 05:56:33,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 392 transitions. [2020-10-16 05:56:33,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:33,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 392 transitions. [2020-10-16 05:56:33,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:33,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:33,929 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:33,930 INFO L185 Difference]: Start difference. First operand has 45 places, 38 transitions, 146 flow. Second operand 4 states and 392 transitions. [2020-10-16 05:56:33,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 182 flow [2020-10-16 05:56:33,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:33,932 INFO L241 Difference]: Finished difference. Result has 48 places, 40 transitions, 172 flow [2020-10-16 05:56:33,932 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2020-10-16 05:56:33,932 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2020-10-16 05:56:33,932 INFO L481 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 172 flow [2020-10-16 05:56:33,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:33,933 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:33,933 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:33,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-16 05:56:33,933 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1927840068, now seen corresponding path program 1 times [2020-10-16 05:56:33,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:33,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572875754] [2020-10-16 05:56:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:33,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572875754] [2020-10-16 05:56:33,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761376907] [2020-10-16 05:56:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:34,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:56:34,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:34,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:34,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:56:34,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277664073] [2020-10-16 05:56:34,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:56:34,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:34,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:56:34,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:56:34,051 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 05:56:34,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 172 flow. Second operand 6 states. [2020-10-16 05:56:34,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:34,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 05:56:34,052 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:34,130 INFO L129 PetriNetUnfolder]: 89/370 cut-off events. [2020-10-16 05:56:34,131 INFO L130 PetriNetUnfolder]: For 170/170 co-relation queries the response was YES. [2020-10-16 05:56:34,132 INFO L80 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 370 events. 89/370 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1693 event pairs, 33 based on Foata normal form. 1/340 useless extension candidates. Maximal degree in co-relation 491. Up to 212 conditions per place. [2020-10-16 05:56:34,134 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 12 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2020-10-16 05:56:34,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 210 flow [2020-10-16 05:56:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2020-10-16 05:56:34,137 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6170886075949367 [2020-10-16 05:56:34,137 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2020-10-16 05:56:34,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2020-10-16 05:56:34,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:34,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2020-10-16 05:56:34,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:34,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:34,142 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:34,142 INFO L185 Difference]: Start difference. First operand has 48 places, 40 transitions, 172 flow. Second operand 4 states and 390 transitions. [2020-10-16 05:56:34,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 210 flow [2020-10-16 05:56:34,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 43 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:34,145 INFO L241 Difference]: Finished difference. Result has 51 places, 41 transitions, 187 flow [2020-10-16 05:56:34,145 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2020-10-16 05:56:34,145 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2020-10-16 05:56:34,145 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 187 flow [2020-10-16 05:56:34,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:56:34,146 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:34,146 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:34,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 05:56:34,359 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:34,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:34,360 INFO L82 PathProgramCache]: Analyzing trace with hash -890711517, now seen corresponding path program 1 times [2020-10-16 05:56:34,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:34,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112311400] [2020-10-16 05:56:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:34,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112311400] [2020-10-16 05:56:34,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108390028] [2020-10-16 05:56:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:34,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:56:34,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:34,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:34,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 05:56:34,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575177255] [2020-10-16 05:56:34,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 05:56:34,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:34,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 05:56:34,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 05:56:34,504 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 05:56:34,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 187 flow. Second operand 8 states. [2020-10-16 05:56:34,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:34,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 05:56:34,505 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:34,580 INFO L129 PetriNetUnfolder]: 87/362 cut-off events. [2020-10-16 05:56:34,580 INFO L130 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2020-10-16 05:56:34,581 INFO L80 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 362 events. 87/362 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1701 event pairs, 34 based on Foata normal form. 1/332 useless extension candidates. Maximal degree in co-relation 886. Up to 206 conditions per place. [2020-10-16 05:56:34,584 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 13 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2020-10-16 05:56:34,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 233 flow [2020-10-16 05:56:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:56:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:56:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 486 transitions. [2020-10-16 05:56:34,587 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6151898734177215 [2020-10-16 05:56:34,587 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 486 transitions. [2020-10-16 05:56:34,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 486 transitions. [2020-10-16 05:56:34,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:34,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 486 transitions. [2020-10-16 05:56:34,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:56:34,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:56:34,591 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:56:34,591 INFO L185 Difference]: Start difference. First operand has 51 places, 41 transitions, 187 flow. Second operand 5 states and 486 transitions. [2020-10-16 05:56:34,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 233 flow [2020-10-16 05:56:34,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 227 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 05:56:34,594 INFO L241 Difference]: Finished difference. Result has 54 places, 42 transitions, 201 flow [2020-10-16 05:56:34,594 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2020-10-16 05:56:34,595 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2020-10-16 05:56:34,595 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 201 flow [2020-10-16 05:56:34,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 05:56:34,595 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:34,596 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:34,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 05:56:34,809 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:34,810 INFO L82 PathProgramCache]: Analyzing trace with hash 99472464, now seen corresponding path program 1 times [2020-10-16 05:56:34,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:34,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684340893] [2020-10-16 05:56:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:34,822 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:34,831 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:34,838 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:34,838 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:34,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-16 05:56:34,838 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:34,839 WARN L371 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:34,839 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-10-16 05:56:34,847 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,847 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,848 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,848 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,848 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,848 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,848 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,848 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,849 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,849 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,849 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,849 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,849 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,849 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,849 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,850 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,850 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,850 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,850 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,850 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,850 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,851 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,851 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,851 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,851 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,851 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,851 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,851 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,852 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,852 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,852 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,852 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,852 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,852 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,852 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,853 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,853 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,853 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,853 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,853 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,853 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,853 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,854 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,854 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,854 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,854 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,854 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,855 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,855 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,856 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,856 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,856 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,857 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,857 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,857 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,857 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,857 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,858 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,858 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,858 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,859 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,859 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,860 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,860 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,860 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,860 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,860 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,861 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,861 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,861 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,862 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,862 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,866 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:34,866 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:34,866 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:34,866 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:34,866 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:34,866 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:34,866 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:34,867 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:34,867 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:34,868 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 106 transitions, 290 flow [2020-10-16 05:56:35,121 INFO L129 PetriNetUnfolder]: 399/2291 cut-off events. [2020-10-16 05:56:35,121 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 05:56:35,125 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 16193 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. [2020-10-16 05:56:35,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 106 transitions, 290 flow [2020-10-16 05:56:35,133 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 99 transitions, 276 flow [2020-10-16 05:56:35,133 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:35,133 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 99 transitions, 276 flow [2020-10-16 05:56:35,134 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 99 transitions, 276 flow [2020-10-16 05:56:35,134 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 101 places, 99 transitions, 276 flow [2020-10-16 05:56:35,292 INFO L129 PetriNetUnfolder]: 335/1843 cut-off events. [2020-10-16 05:56:35,292 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 05:56:35,298 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 1843 events. 335/1843 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 12005 event pairs, 72 based on Foata normal form. 0/1572 useless extension candidates. Maximal degree in co-relation 1047. Up to 192 conditions per place. [2020-10-16 05:56:35,329 INFO L117 LiptonReduction]: Number of co-enabled transitions 3240 [2020-10-16 05:56:36,687 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-16 05:56:36,936 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-16 05:56:37,069 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 05:56:37,083 INFO L132 LiptonReduction]: Checked pairs total: 11418 [2020-10-16 05:56:37,083 INFO L134 LiptonReduction]: Total number of compositions: 62 [2020-10-16 05:56:37,083 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1950 [2020-10-16 05:56:37,085 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 05:56:37,085 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:37,085 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:37,085 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:37,086 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:37,086 INFO L82 PathProgramCache]: Analyzing trace with hash 32517232, now seen corresponding path program 1 times [2020-10-16 05:56:37,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:37,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699204908] [2020-10-16 05:56:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:37,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699204908] [2020-10-16 05:56:37,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:37,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:37,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931645020] [2020-10-16 05:56:37,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:37,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:37,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:37,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:37,110 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 05:56:37,110 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 162 flow. Second operand 3 states. [2020-10-16 05:56:37,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:37,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 05:56:37,111 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:37,187 INFO L129 PetriNetUnfolder]: 198/625 cut-off events. [2020-10-16 05:56:37,187 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 05:56:37,189 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 625 events. 198/625 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2984 event pairs, 72 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 603. Up to 338 conditions per place. [2020-10-16 05:56:37,193 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 9 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2020-10-16 05:56:37,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 188 flow [2020-10-16 05:56:37,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2020-10-16 05:56:37,195 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2020-10-16 05:56:37,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2020-10-16 05:56:37,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2020-10-16 05:56:37,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:37,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2020-10-16 05:56:37,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:37,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:37,198 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:37,198 INFO L185 Difference]: Start difference. First operand has 48 places, 42 transitions, 162 flow. Second operand 3 states and 321 transitions. [2020-10-16 05:56:37,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 188 flow [2020-10-16 05:56:37,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:37,200 INFO L241 Difference]: Finished difference. Result has 51 places, 43 transitions, 174 flow [2020-10-16 05:56:37,200 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2020-10-16 05:56:37,200 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2020-10-16 05:56:37,201 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 174 flow [2020-10-16 05:56:37,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:37,201 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:37,201 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:37,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-16 05:56:37,201 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:37,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1901913869, now seen corresponding path program 1 times [2020-10-16 05:56:37,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:37,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813440271] [2020-10-16 05:56:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:37,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813440271] [2020-10-16 05:56:37,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:37,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:37,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574239303] [2020-10-16 05:56:37,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:37,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:37,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:37,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:37,229 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 05:56:37,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 174 flow. Second operand 4 states. [2020-10-16 05:56:37,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:37,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 05:56:37,230 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:37,319 INFO L129 PetriNetUnfolder]: 207/735 cut-off events. [2020-10-16 05:56:37,320 INFO L130 PetriNetUnfolder]: For 263/263 co-relation queries the response was YES. [2020-10-16 05:56:37,322 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 735 events. 207/735 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3946 event pairs, 87 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 1395. Up to 342 conditions per place. [2020-10-16 05:56:37,326 INFO L132 encePairwiseOnDemand]: 161/168 looper letters, 8 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2020-10-16 05:56:37,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 210 flow [2020-10-16 05:56:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 428 transitions. [2020-10-16 05:56:37,328 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2020-10-16 05:56:37,328 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 428 transitions. [2020-10-16 05:56:37,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 428 transitions. [2020-10-16 05:56:37,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:37,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 428 transitions. [2020-10-16 05:56:37,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:37,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:37,331 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:37,331 INFO L185 Difference]: Start difference. First operand has 51 places, 43 transitions, 174 flow. Second operand 4 states and 428 transitions. [2020-10-16 05:56:37,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 210 flow [2020-10-16 05:56:37,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:37,336 INFO L241 Difference]: Finished difference. Result has 54 places, 45 transitions, 200 flow [2020-10-16 05:56:37,336 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2020-10-16 05:56:37,336 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 6 predicate places. [2020-10-16 05:56:37,336 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 200 flow [2020-10-16 05:56:37,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:37,336 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:37,336 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:37,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-16 05:56:37,337 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:37,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:37,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1796489895, now seen corresponding path program 1 times [2020-10-16 05:56:37,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:37,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289947679] [2020-10-16 05:56:37,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:37,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289947679] [2020-10-16 05:56:37,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231351946] [2020-10-16 05:56:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:37,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:56:37,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:37,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:37,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:56:37,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56613212] [2020-10-16 05:56:37,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:56:37,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:37,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:56:37,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:56:37,457 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 05:56:37,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 200 flow. Second operand 6 states. [2020-10-16 05:56:37,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:37,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 05:56:37,458 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:37,550 INFO L129 PetriNetUnfolder]: 206/730 cut-off events. [2020-10-16 05:56:37,550 INFO L130 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2020-10-16 05:56:37,553 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1828 conditions, 730 events. 206/730 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3954 event pairs, 87 based on Foata normal form. 1/668 useless extension candidates. Maximal degree in co-relation 944. Up to 413 conditions per place. [2020-10-16 05:56:37,557 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 12 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2020-10-16 05:56:37,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 48 transitions, 238 flow [2020-10-16 05:56:37,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:37,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 426 transitions. [2020-10-16 05:56:37,559 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2020-10-16 05:56:37,560 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 426 transitions. [2020-10-16 05:56:37,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 426 transitions. [2020-10-16 05:56:37,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:37,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 426 transitions. [2020-10-16 05:56:37,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:37,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:37,563 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:37,563 INFO L185 Difference]: Start difference. First operand has 54 places, 45 transitions, 200 flow. Second operand 4 states and 426 transitions. [2020-10-16 05:56:37,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 48 transitions, 238 flow [2020-10-16 05:56:37,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 48 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:37,565 INFO L241 Difference]: Finished difference. Result has 57 places, 46 transitions, 215 flow [2020-10-16 05:56:37,566 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2020-10-16 05:56:37,566 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 9 predicate places. [2020-10-16 05:56:37,566 INFO L481 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 215 flow [2020-10-16 05:56:37,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:56:37,566 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:37,566 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:37,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:37,780 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:37,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:37,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1936900963, now seen corresponding path program 1 times [2020-10-16 05:56:37,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:37,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688192830] [2020-10-16 05:56:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:37,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688192830] [2020-10-16 05:56:37,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781473356] [2020-10-16 05:56:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:37,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:56:37,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:37,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:37,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 05:56:37,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607340717] [2020-10-16 05:56:37,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 05:56:37,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:37,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 05:56:37,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 05:56:37,921 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 05:56:37,921 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 215 flow. Second operand 8 states. [2020-10-16 05:56:37,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:37,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 05:56:37,922 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:38,035 INFO L129 PetriNetUnfolder]: 204/722 cut-off events. [2020-10-16 05:56:38,036 INFO L130 PetriNetUnfolder]: For 359/359 co-relation queries the response was YES. [2020-10-16 05:56:38,038 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1821 conditions, 722 events. 204/722 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3975 event pairs, 88 based on Foata normal form. 1/660 useless extension candidates. Maximal degree in co-relation 1780. Up to 407 conditions per place. [2020-10-16 05:56:38,042 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 13 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2020-10-16 05:56:38,042 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 261 flow [2020-10-16 05:56:38,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:56:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:56:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 531 transitions. [2020-10-16 05:56:38,045 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2020-10-16 05:56:38,045 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 531 transitions. [2020-10-16 05:56:38,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 531 transitions. [2020-10-16 05:56:38,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:38,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 531 transitions. [2020-10-16 05:56:38,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:56:38,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:56:38,048 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:56:38,048 INFO L185 Difference]: Start difference. First operand has 57 places, 46 transitions, 215 flow. Second operand 5 states and 531 transitions. [2020-10-16 05:56:38,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 261 flow [2020-10-16 05:56:38,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 255 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 05:56:38,052 INFO L241 Difference]: Finished difference. Result has 60 places, 47 transitions, 229 flow [2020-10-16 05:56:38,052 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2020-10-16 05:56:38,052 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 12 predicate places. [2020-10-16 05:56:38,052 INFO L481 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 229 flow [2020-10-16 05:56:38,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 05:56:38,053 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:38,053 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:38,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 05:56:38,267 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:38,268 INFO L82 PathProgramCache]: Analyzing trace with hash 348671934, now seen corresponding path program 1 times [2020-10-16 05:56:38,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:38,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622934833] [2020-10-16 05:56:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:38,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622934833] [2020-10-16 05:56:38,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898514408] [2020-10-16 05:56:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 05:56:38,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:38,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:38,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 05:56:38,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481159478] [2020-10-16 05:56:38,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 05:56:38,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:38,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 05:56:38,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 05:56:38,439 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 05:56:38,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 229 flow. Second operand 10 states. [2020-10-16 05:56:38,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:38,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 05:56:38,440 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:38,578 INFO L129 PetriNetUnfolder]: 201/711 cut-off events. [2020-10-16 05:56:38,578 INFO L130 PetriNetUnfolder]: For 367/367 co-relation queries the response was YES. [2020-10-16 05:56:38,580 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1802 conditions, 711 events. 201/711 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4003 event pairs, 92 based on Foata normal form. 1/649 useless extension candidates. Maximal degree in co-relation 1746. Up to 400 conditions per place. [2020-10-16 05:56:38,584 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 14 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2020-10-16 05:56:38,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 52 transitions, 283 flow [2020-10-16 05:56:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 05:56:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 05:56:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 636 transitions. [2020-10-16 05:56:38,587 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2020-10-16 05:56:38,587 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 636 transitions. [2020-10-16 05:56:38,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 636 transitions. [2020-10-16 05:56:38,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:38,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 636 transitions. [2020-10-16 05:56:38,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 05:56:38,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 05:56:38,591 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 05:56:38,591 INFO L185 Difference]: Start difference. First operand has 60 places, 47 transitions, 229 flow. Second operand 6 states and 636 transitions. [2020-10-16 05:56:38,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 52 transitions, 283 flow [2020-10-16 05:56:38,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 52 transitions, 273 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 05:56:38,594 INFO L241 Difference]: Finished difference. Result has 63 places, 48 transitions, 243 flow [2020-10-16 05:56:38,594 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2020-10-16 05:56:38,595 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2020-10-16 05:56:38,595 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 243 flow [2020-10-16 05:56:38,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 05:56:38,595 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:38,595 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:38,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:38,810 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:38,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1736436190, now seen corresponding path program 1 times [2020-10-16 05:56:38,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:38,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956446990] [2020-10-16 05:56:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:38,822 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:38,843 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:38,859 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:38,860 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:38,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-16 05:56:38,860 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:38,861 WARN L371 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:38,861 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-10-16 05:56:38,872 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,872 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,872 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,872 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,873 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,873 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,873 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,873 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,873 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,873 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,873 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,873 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,874 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,874 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,874 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,874 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,874 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,874 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,874 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,875 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,875 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,875 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,875 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,875 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,875 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,875 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,876 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,876 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,876 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,876 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,876 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,876 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,876 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,877 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,877 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,877 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,877 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,877 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,877 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,878 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,879 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,879 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,879 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,879 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,879 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,879 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,879 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,880 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,880 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,880 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,880 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,880 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,880 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,881 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,882 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,882 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,882 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,882 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,882 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,883 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,883 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,884 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,884 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,884 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,885 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,885 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,885 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,885 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,885 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,891 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,891 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,891 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,891 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,891 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,892 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,892 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,892 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,892 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,893 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,893 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,893 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,894 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,894 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,894 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,898 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:38,899 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:38,899 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:38,899 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:38,901 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:38,901 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:38,901 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:38,901 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:38,901 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:38,902 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 115 places, 113 transitions, 324 flow [2020-10-16 05:56:39,231 INFO L129 PetriNetUnfolder]: 849/4546 cut-off events. [2020-10-16 05:56:39,231 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 05:56:39,253 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. [2020-10-16 05:56:39,253 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 113 transitions, 324 flow [2020-10-16 05:56:39,270 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 106 transitions, 310 flow [2020-10-16 05:56:39,271 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:39,271 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 106 transitions, 310 flow [2020-10-16 05:56:39,271 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 106 transitions, 310 flow [2020-10-16 05:56:39,271 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 109 places, 106 transitions, 310 flow [2020-10-16 05:56:39,558 INFO L129 PetriNetUnfolder]: 721/3650 cut-off events. [2020-10-16 05:56:39,558 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 05:56:39,568 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4148 conditions, 3650 events. 721/3650 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 29207 event pairs, 201 based on Foata normal form. 0/3121 useless extension candidates. Maximal degree in co-relation 2061. Up to 448 conditions per place. [2020-10-16 05:56:39,624 INFO L117 LiptonReduction]: Number of co-enabled transitions 4060 [2020-10-16 05:56:41,052 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 05:56:41,125 INFO L132 LiptonReduction]: Checked pairs total: 18122 [2020-10-16 05:56:41,125 INFO L134 LiptonReduction]: Total number of compositions: 65 [2020-10-16 05:56:41,126 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1855 [2020-10-16 05:56:41,127 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 05:56:41,127 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:41,127 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:41,127 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:41,127 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:41,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:41,127 INFO L82 PathProgramCache]: Analyzing trace with hash 38211156, now seen corresponding path program 1 times [2020-10-16 05:56:41,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:41,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087221189] [2020-10-16 05:56:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:41,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087221189] [2020-10-16 05:56:41,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:41,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:41,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801760071] [2020-10-16 05:56:41,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:41,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:41,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:41,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:41,147 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 05:56:41,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 192 flow. Second operand 3 states. [2020-10-16 05:56:41,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:41,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 05:56:41,148 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:41,319 INFO L129 PetriNetUnfolder]: 455/1273 cut-off events. [2020-10-16 05:56:41,319 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 05:56:41,321 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2434 conditions, 1273 events. 455/1273 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7235 event pairs, 201 based on Foata normal form. 0/1010 useless extension candidates. Maximal degree in co-relation 1199. Up to 661 conditions per place. [2020-10-16 05:56:41,326 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 9 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2020-10-16 05:56:41,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 218 flow [2020-10-16 05:56:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2020-10-16 05:56:41,334 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6573033707865169 [2020-10-16 05:56:41,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2020-10-16 05:56:41,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2020-10-16 05:56:41,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:41,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2020-10-16 05:56:41,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:41,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:41,336 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:41,337 INFO L185 Difference]: Start difference. First operand has 54 places, 47 transitions, 192 flow. Second operand 3 states and 351 transitions. [2020-10-16 05:56:41,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 218 flow [2020-10-16 05:56:41,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 218 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:41,339 INFO L241 Difference]: Finished difference. Result has 57 places, 48 transitions, 204 flow [2020-10-16 05:56:41,339 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2020-10-16 05:56:41,339 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2020-10-16 05:56:41,340 INFO L481 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 204 flow [2020-10-16 05:56:41,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:41,340 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:41,340 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:41,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-16 05:56:41,340 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:41,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:41,340 INFO L82 PathProgramCache]: Analyzing trace with hash 939052157, now seen corresponding path program 1 times [2020-10-16 05:56:41,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:41,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930239200] [2020-10-16 05:56:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:41,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930239200] [2020-10-16 05:56:41,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:41,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:41,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525679543] [2020-10-16 05:56:41,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:41,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:41,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:41,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:41,374 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 05:56:41,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 204 flow. Second operand 4 states. [2020-10-16 05:56:41,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:41,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 05:56:41,375 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:41,493 INFO L129 PetriNetUnfolder]: 469/1466 cut-off events. [2020-10-16 05:56:41,493 INFO L130 PetriNetUnfolder]: For 553/553 co-relation queries the response was YES. [2020-10-16 05:56:41,498 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2817 conditions, 1466 events. 469/1466 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9098 event pairs, 222 based on Foata normal form. 0/1212 useless extension candidates. Maximal degree in co-relation 2793. Up to 670 conditions per place. [2020-10-16 05:56:41,503 INFO L132 encePairwiseOnDemand]: 171/178 looper letters, 8 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2020-10-16 05:56:41,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 240 flow [2020-10-16 05:56:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2020-10-16 05:56:41,506 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6573033707865169 [2020-10-16 05:56:41,506 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 468 transitions. [2020-10-16 05:56:41,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 468 transitions. [2020-10-16 05:56:41,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:41,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 468 transitions. [2020-10-16 05:56:41,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:41,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:41,509 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:41,509 INFO L185 Difference]: Start difference. First operand has 57 places, 48 transitions, 204 flow. Second operand 4 states and 468 transitions. [2020-10-16 05:56:41,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 240 flow [2020-10-16 05:56:41,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:41,512 INFO L241 Difference]: Finished difference. Result has 60 places, 50 transitions, 230 flow [2020-10-16 05:56:41,512 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2020-10-16 05:56:41,512 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2020-10-16 05:56:41,512 INFO L481 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 230 flow [2020-10-16 05:56:41,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:41,513 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:41,513 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:41,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-16 05:56:41,513 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:41,513 INFO L82 PathProgramCache]: Analyzing trace with hash 314298890, now seen corresponding path program 1 times [2020-10-16 05:56:41,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:41,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702391063] [2020-10-16 05:56:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:41,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702391063] [2020-10-16 05:56:41,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237628590] [2020-10-16 05:56:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:41,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:56:41,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:41,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:41,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:56:41,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123381848] [2020-10-16 05:56:41,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:56:41,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:41,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:56:41,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:56:41,620 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 05:56:41,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 230 flow. Second operand 6 states. [2020-10-16 05:56:41,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:41,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 05:56:41,621 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:41,761 INFO L129 PetriNetUnfolder]: 468/1461 cut-off events. [2020-10-16 05:56:41,761 INFO L130 PetriNetUnfolder]: For 707/707 co-relation queries the response was YES. [2020-10-16 05:56:41,767 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3625 conditions, 1461 events. 468/1461 cut-off events. For 707/707 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9105 event pairs, 222 based on Foata normal form. 1/1335 useless extension candidates. Maximal degree in co-relation 1837. Up to 807 conditions per place. [2020-10-16 05:56:41,774 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 12 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2020-10-16 05:56:41,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 268 flow [2020-10-16 05:56:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2020-10-16 05:56:41,781 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6544943820224719 [2020-10-16 05:56:41,781 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2020-10-16 05:56:41,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2020-10-16 05:56:41,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:41,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2020-10-16 05:56:41,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:41,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:41,784 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:41,784 INFO L185 Difference]: Start difference. First operand has 60 places, 50 transitions, 230 flow. Second operand 4 states and 466 transitions. [2020-10-16 05:56:41,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 268 flow [2020-10-16 05:56:41,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 267 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:41,787 INFO L241 Difference]: Finished difference. Result has 63 places, 51 transitions, 245 flow [2020-10-16 05:56:41,787 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2020-10-16 05:56:41,788 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2020-10-16 05:56:41,788 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 245 flow [2020-10-16 05:56:41,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:56:41,788 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:41,788 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:42,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 05:56:42,001 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:42,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:42,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1701157806, now seen corresponding path program 1 times [2020-10-16 05:56:42,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:42,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908313503] [2020-10-16 05:56:42,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:42,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908313503] [2020-10-16 05:56:42,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920051237] [2020-10-16 05:56:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:42,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:56:42,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:42,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:42,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 05:56:42,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548523465] [2020-10-16 05:56:42,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 05:56:42,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:42,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 05:56:42,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-16 05:56:42,127 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 05:56:42,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 245 flow. Second operand 8 states. [2020-10-16 05:56:42,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:42,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 05:56:42,128 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:42,267 INFO L129 PetriNetUnfolder]: 466/1453 cut-off events. [2020-10-16 05:56:42,267 INFO L130 PetriNetUnfolder]: For 722/722 co-relation queries the response was YES. [2020-10-16 05:56:42,270 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3620 conditions, 1453 events. 466/1453 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9159 event pairs, 223 based on Foata normal form. 1/1327 useless extension candidates. Maximal degree in co-relation 3578. Up to 801 conditions per place. [2020-10-16 05:56:42,277 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 13 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2020-10-16 05:56:42,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 291 flow [2020-10-16 05:56:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:56:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:56:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 581 transitions. [2020-10-16 05:56:42,279 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6528089887640449 [2020-10-16 05:56:42,279 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 581 transitions. [2020-10-16 05:56:42,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 581 transitions. [2020-10-16 05:56:42,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:42,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 581 transitions. [2020-10-16 05:56:42,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:56:42,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:56:42,283 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:56:42,283 INFO L185 Difference]: Start difference. First operand has 63 places, 51 transitions, 245 flow. Second operand 5 states and 581 transitions. [2020-10-16 05:56:42,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 291 flow [2020-10-16 05:56:42,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 285 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 05:56:42,287 INFO L241 Difference]: Finished difference. Result has 66 places, 52 transitions, 259 flow [2020-10-16 05:56:42,287 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2020-10-16 05:56:42,288 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2020-10-16 05:56:42,288 INFO L481 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 259 flow [2020-10-16 05:56:42,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 05:56:42,288 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:42,288 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:42,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 05:56:42,501 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:42,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:42,502 INFO L82 PathProgramCache]: Analyzing trace with hash -223060935, now seen corresponding path program 1 times [2020-10-16 05:56:42,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:42,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800955746] [2020-10-16 05:56:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:42,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800955746] [2020-10-16 05:56:42,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241451214] [2020-10-16 05:56:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:42,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 05:56:42,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:42,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:42,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 05:56:42,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265773003] [2020-10-16 05:56:42,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 05:56:42,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:42,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 05:56:42,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-16 05:56:42,699 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 05:56:42,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 259 flow. Second operand 10 states. [2020-10-16 05:56:42,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:42,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 05:56:42,700 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:42,948 INFO L129 PetriNetUnfolder]: 463/1442 cut-off events. [2020-10-16 05:56:42,948 INFO L130 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2020-10-16 05:56:42,956 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3603 conditions, 1442 events. 463/1442 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 9230 event pairs, 227 based on Foata normal form. 1/1316 useless extension candidates. Maximal degree in co-relation 3546. Up to 794 conditions per place. [2020-10-16 05:56:42,965 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 14 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2020-10-16 05:56:42,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 313 flow [2020-10-16 05:56:42,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 05:56:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 05:56:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 696 transitions. [2020-10-16 05:56:42,969 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2020-10-16 05:56:42,969 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 696 transitions. [2020-10-16 05:56:42,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 696 transitions. [2020-10-16 05:56:42,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:42,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 696 transitions. [2020-10-16 05:56:42,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 05:56:42,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 05:56:42,975 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 05:56:42,975 INFO L185 Difference]: Start difference. First operand has 66 places, 52 transitions, 259 flow. Second operand 6 states and 696 transitions. [2020-10-16 05:56:42,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 313 flow [2020-10-16 05:56:42,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 303 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 05:56:42,982 INFO L241 Difference]: Finished difference. Result has 69 places, 53 transitions, 273 flow [2020-10-16 05:56:42,982 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2020-10-16 05:56:42,983 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2020-10-16 05:56:42,983 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 273 flow [2020-10-16 05:56:42,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 05:56:42,983 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:42,983 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:43,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 05:56:43,196 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash 495964735, now seen corresponding path program 1 times [2020-10-16 05:56:43,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:43,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831166726] [2020-10-16 05:56:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:43,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831166726] [2020-10-16 05:56:43,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040192664] [2020-10-16 05:56:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:43,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 05:56:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:43,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:43,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 05:56:43,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79771205] [2020-10-16 05:56:43,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 05:56:43,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:43,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 05:56:43,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-10-16 05:56:43,437 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 05:56:43,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 273 flow. Second operand 12 states. [2020-10-16 05:56:43,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:43,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 05:56:43,439 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:43,706 INFO L129 PetriNetUnfolder]: 459/1428 cut-off events. [2020-10-16 05:56:43,706 INFO L130 PetriNetUnfolder]: For 740/740 co-relation queries the response was YES. [2020-10-16 05:56:43,713 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3575 conditions, 1428 events. 459/1428 cut-off events. For 740/740 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9329 event pairs, 238 based on Foata normal form. 1/1302 useless extension candidates. Maximal degree in co-relation 3502. Up to 653 conditions per place. [2020-10-16 05:56:43,719 INFO L132 encePairwiseOnDemand]: 172/178 looper letters, 10 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2020-10-16 05:56:43,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 59 transitions, 335 flow [2020-10-16 05:56:43,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 05:56:43,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 05:56:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 924 transitions. [2020-10-16 05:56:43,723 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.648876404494382 [2020-10-16 05:56:43,723 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 924 transitions. [2020-10-16 05:56:43,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 924 transitions. [2020-10-16 05:56:43,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:43,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 924 transitions. [2020-10-16 05:56:43,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 05:56:43,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 05:56:43,729 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 05:56:43,730 INFO L185 Difference]: Start difference. First operand has 69 places, 53 transitions, 273 flow. Second operand 8 states and 924 transitions. [2020-10-16 05:56:43,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 59 transitions, 335 flow [2020-10-16 05:56:43,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 59 transitions, 321 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 05:56:43,736 INFO L241 Difference]: Finished difference. Result has 74 places, 55 transitions, 306 flow [2020-10-16 05:56:43,736 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=306, PETRI_PLACES=74, PETRI_TRANSITIONS=55} [2020-10-16 05:56:43,736 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2020-10-16 05:56:43,737 INFO L481 AbstractCegarLoop]: Abstraction has has 74 places, 55 transitions, 306 flow [2020-10-16 05:56:43,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 05:56:43,737 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:43,737 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:43,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 05:56:43,950 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:43,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:43,951 INFO L82 PathProgramCache]: Analyzing trace with hash 781378849, now seen corresponding path program 1 times [2020-10-16 05:56:43,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:43,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297351553] [2020-10-16 05:56:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:43,961 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:43,969 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:43,976 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:43,976 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:43,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-16 05:56:43,976 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:43,977 WARN L371 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:43,977 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2020-10-16 05:56:43,986 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,987 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,987 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,987 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,987 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,987 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,987 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,987 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,988 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,988 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,988 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,988 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,988 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,988 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,988 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,988 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,989 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,989 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,989 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,989 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,989 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,989 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,989 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,989 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,989 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,990 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,990 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,990 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,990 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,990 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,990 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,990 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,990 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,991 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,991 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,991 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,991 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,991 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,991 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,991 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,991 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,992 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,992 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,992 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,992 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,992 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,992 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,992 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,992 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,993 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,993 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,993 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,993 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,993 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,993 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,993 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,994 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,994 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,994 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,994 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,994 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,995 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,995 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,995 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,996 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,996 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,997 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,997 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,997 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,997 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,997 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,998 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,998 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,998 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,998 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,998 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:43,999 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,000 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,000 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,000 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,000 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,001 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,001 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,001 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,001 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,001 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,002 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,002 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,003 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,003 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,003 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,004 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,004 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,004 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,004 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,004 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,010 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:44,010 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:44,010 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:44,010 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:44,010 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:44,010 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:44,011 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:44,011 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:44,011 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:44,012 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 123 places, 120 transitions, 360 flow [2020-10-16 05:56:44,741 INFO L129 PetriNetUnfolder]: 1811/9105 cut-off events. [2020-10-16 05:56:44,741 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 05:56:44,770 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 89225 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. [2020-10-16 05:56:44,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 120 transitions, 360 flow [2020-10-16 05:56:44,792 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 113 transitions, 346 flow [2020-10-16 05:56:44,793 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:44,793 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 113 transitions, 346 flow [2020-10-16 05:56:44,793 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 113 transitions, 346 flow [2020-10-16 05:56:44,793 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 117 places, 113 transitions, 346 flow [2020-10-16 05:56:45,486 INFO L129 PetriNetUnfolder]: 1555/7313 cut-off events. [2020-10-16 05:56:45,487 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 05:56:45,504 INFO L80 FinitePrefix]: Finished finitePrefix Result has 8398 conditions, 7313 events. 1555/7313 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 67995 event pairs, 522 based on Foata normal form. 0/6270 useless extension candidates. Maximal degree in co-relation 4132. Up to 1024 conditions per place. [2020-10-16 05:56:45,606 INFO L117 LiptonReduction]: Number of co-enabled transitions 4960 [2020-10-16 05:56:47,144 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 05:56:47,214 INFO L132 LiptonReduction]: Checked pairs total: 20069 [2020-10-16 05:56:47,214 INFO L134 LiptonReduction]: Total number of compositions: 66 [2020-10-16 05:56:47,214 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2421 [2020-10-16 05:56:47,216 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 05:56:47,216 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:47,216 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:47,216 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:47,216 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash 44152403, now seen corresponding path program 1 times [2020-10-16 05:56:47,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:47,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550846532] [2020-10-16 05:56:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:47,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550846532] [2020-10-16 05:56:47,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:47,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:47,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162847959] [2020-10-16 05:56:47,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:47,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:47,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:47,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:47,235 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:56:47,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 224 flow. Second operand 3 states. [2020-10-16 05:56:47,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:47,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:56:47,236 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:47,571 INFO L129 PetriNetUnfolder]: 1032/2625 cut-off events. [2020-10-16 05:56:47,571 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 05:56:47,577 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5016 conditions, 2625 events. 1032/2625 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 17012 event pairs, 522 based on Foata normal form. 0/2105 useless extension candidates. Maximal degree in co-relation 2436. Up to 1304 conditions per place. [2020-10-16 05:56:47,587 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 9 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2020-10-16 05:56:47,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 250 flow [2020-10-16 05:56:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2020-10-16 05:56:47,589 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2020-10-16 05:56:47,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2020-10-16 05:56:47,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2020-10-16 05:56:47,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:47,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2020-10-16 05:56:47,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:47,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:47,592 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:47,592 INFO L185 Difference]: Start difference. First operand has 60 places, 52 transitions, 224 flow. Second operand 3 states and 372 transitions. [2020-10-16 05:56:47,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 250 flow [2020-10-16 05:56:47,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 54 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:47,596 INFO L241 Difference]: Finished difference. Result has 63 places, 53 transitions, 236 flow [2020-10-16 05:56:47,596 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2020-10-16 05:56:47,596 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2020-10-16 05:56:47,596 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 236 flow [2020-10-16 05:56:47,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:47,596 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:47,596 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:47,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-16 05:56:47,597 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1362338127, now seen corresponding path program 1 times [2020-10-16 05:56:47,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:47,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50493508] [2020-10-16 05:56:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:47,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50493508] [2020-10-16 05:56:47,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:47,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:47,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196319465] [2020-10-16 05:56:47,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:47,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:47,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:47,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:47,617 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:56:47,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 236 flow. Second operand 4 states. [2020-10-16 05:56:47,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:47,618 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:56:47,618 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:47,909 INFO L129 PetriNetUnfolder]: 1052/2968 cut-off events. [2020-10-16 05:56:47,910 INFO L130 PetriNetUnfolder]: For 1172/1172 co-relation queries the response was YES. [2020-10-16 05:56:47,918 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5694 conditions, 2968 events. 1052/2968 cut-off events. For 1172/1172 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20909 event pairs, 550 based on Foata normal form. 0/2458 useless extension candidates. Maximal degree in co-relation 5669. Up to 1319 conditions per place. [2020-10-16 05:56:47,925 INFO L132 encePairwiseOnDemand]: 179/186 looper letters, 8 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2020-10-16 05:56:47,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 272 flow [2020-10-16 05:56:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 496 transitions. [2020-10-16 05:56:47,927 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2020-10-16 05:56:47,927 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 496 transitions. [2020-10-16 05:56:47,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 496 transitions. [2020-10-16 05:56:47,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:47,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 496 transitions. [2020-10-16 05:56:47,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:47,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:47,930 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:47,930 INFO L185 Difference]: Start difference. First operand has 63 places, 53 transitions, 236 flow. Second operand 4 states and 496 transitions. [2020-10-16 05:56:47,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 272 flow [2020-10-16 05:56:47,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 57 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:47,934 INFO L241 Difference]: Finished difference. Result has 66 places, 55 transitions, 262 flow [2020-10-16 05:56:47,934 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2020-10-16 05:56:47,934 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2020-10-16 05:56:47,934 INFO L481 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 262 flow [2020-10-16 05:56:47,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:47,935 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:47,935 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:47,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-16 05:56:47,935 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:47,935 INFO L82 PathProgramCache]: Analyzing trace with hash -355906383, now seen corresponding path program 1 times [2020-10-16 05:56:47,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:47,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877620406] [2020-10-16 05:56:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:47,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877620406] [2020-10-16 05:56:47,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388058646] [2020-10-16 05:56:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:48,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:56:48,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:48,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:48,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:56:48,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390446184] [2020-10-16 05:56:48,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:56:48,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:48,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:56:48,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:56:48,052 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:56:48,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 262 flow. Second operand 6 states. [2020-10-16 05:56:48,053 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:48,053 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:56:48,053 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:48,438 INFO L129 PetriNetUnfolder]: 1051/2963 cut-off events. [2020-10-16 05:56:48,438 INFO L130 PetriNetUnfolder]: For 1462/1462 co-relation queries the response was YES. [2020-10-16 05:56:48,444 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7286 conditions, 2963 events. 1051/2963 cut-off events. For 1462/1462 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20845 event pairs, 550 based on Foata normal form. 1/2709 useless extension candidates. Maximal degree in co-relation 3660. Up to 1586 conditions per place. [2020-10-16 05:56:48,451 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 12 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2020-10-16 05:56:48,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 300 flow [2020-10-16 05:56:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:48,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 494 transitions. [2020-10-16 05:56:48,452 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6639784946236559 [2020-10-16 05:56:48,453 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 494 transitions. [2020-10-16 05:56:48,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 494 transitions. [2020-10-16 05:56:48,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:48,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 494 transitions. [2020-10-16 05:56:48,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:48,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:48,455 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:48,455 INFO L185 Difference]: Start difference. First operand has 66 places, 55 transitions, 262 flow. Second operand 4 states and 494 transitions. [2020-10-16 05:56:48,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 300 flow [2020-10-16 05:56:48,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 58 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:48,459 INFO L241 Difference]: Finished difference. Result has 69 places, 56 transitions, 277 flow [2020-10-16 05:56:48,459 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=277, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2020-10-16 05:56:48,460 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 9 predicate places. [2020-10-16 05:56:48,460 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 277 flow [2020-10-16 05:56:48,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:56:48,460 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:48,460 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:48,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-16 05:56:48,675 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:48,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:48,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1453614924, now seen corresponding path program 1 times [2020-10-16 05:56:48,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:48,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482613888] [2020-10-16 05:56:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:48,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482613888] [2020-10-16 05:56:48,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990875894] [2020-10-16 05:56:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:48,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:56:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:48,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:48,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 05:56:48,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608412788] [2020-10-16 05:56:48,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 05:56:48,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:48,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 05:56:48,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 05:56:48,812 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:56:48,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 277 flow. Second operand 8 states. [2020-10-16 05:56:48,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:48,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:56:48,812 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:49,068 INFO L129 PetriNetUnfolder]: 1049/2955 cut-off events. [2020-10-16 05:56:49,068 INFO L130 PetriNetUnfolder]: For 1479/1479 co-relation queries the response was YES. [2020-10-16 05:56:49,082 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7283 conditions, 2955 events. 1049/2955 cut-off events. For 1479/1479 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20949 event pairs, 551 based on Foata normal form. 1/2701 useless extension candidates. Maximal degree in co-relation 7240. Up to 1580 conditions per place. [2020-10-16 05:56:49,093 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 13 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2020-10-16 05:56:49,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 60 transitions, 323 flow [2020-10-16 05:56:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:56:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:56:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 616 transitions. [2020-10-16 05:56:49,095 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6623655913978495 [2020-10-16 05:56:49,095 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 616 transitions. [2020-10-16 05:56:49,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 616 transitions. [2020-10-16 05:56:49,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:49,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 616 transitions. [2020-10-16 05:56:49,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:56:49,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:56:49,097 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:56:49,097 INFO L185 Difference]: Start difference. First operand has 69 places, 56 transitions, 277 flow. Second operand 5 states and 616 transitions. [2020-10-16 05:56:49,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 60 transitions, 323 flow [2020-10-16 05:56:49,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 60 transitions, 317 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 05:56:49,101 INFO L241 Difference]: Finished difference. Result has 72 places, 57 transitions, 291 flow [2020-10-16 05:56:49,101 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2020-10-16 05:56:49,101 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 12 predicate places. [2020-10-16 05:56:49,101 INFO L481 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 291 flow [2020-10-16 05:56:49,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 05:56:49,101 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:49,102 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:49,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:49,309 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:49,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:49,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1245149690, now seen corresponding path program 1 times [2020-10-16 05:56:49,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:49,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541104790] [2020-10-16 05:56:49,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:49,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541104790] [2020-10-16 05:56:49,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994912967] [2020-10-16 05:56:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:49,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 05:56:49,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:49,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:49,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 05:56:49,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137912517] [2020-10-16 05:56:49,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 05:56:49,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:49,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 05:56:49,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 05:56:49,479 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:56:49,479 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 291 flow. Second operand 10 states. [2020-10-16 05:56:49,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:49,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:56:49,480 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:49,747 INFO L129 PetriNetUnfolder]: 1046/2944 cut-off events. [2020-10-16 05:56:49,747 INFO L130 PetriNetUnfolder]: For 1493/1493 co-relation queries the response was YES. [2020-10-16 05:56:49,757 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7268 conditions, 2944 events. 1046/2944 cut-off events. For 1493/1493 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 21011 event pairs, 555 based on Foata normal form. 1/2690 useless extension candidates. Maximal degree in co-relation 7210. Up to 1573 conditions per place. [2020-10-16 05:56:49,764 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 14 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2020-10-16 05:56:49,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 62 transitions, 345 flow [2020-10-16 05:56:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 05:56:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 05:56:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2020-10-16 05:56:49,766 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2020-10-16 05:56:49,766 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2020-10-16 05:56:49,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2020-10-16 05:56:49,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:49,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2020-10-16 05:56:49,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 05:56:49,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 05:56:49,769 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 05:56:49,770 INFO L185 Difference]: Start difference. First operand has 72 places, 57 transitions, 291 flow. Second operand 6 states and 738 transitions. [2020-10-16 05:56:49,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 62 transitions, 345 flow [2020-10-16 05:56:49,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 62 transitions, 335 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 05:56:49,775 INFO L241 Difference]: Finished difference. Result has 75 places, 58 transitions, 305 flow [2020-10-16 05:56:49,775 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2020-10-16 05:56:49,775 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 15 predicate places. [2020-10-16 05:56:49,775 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 305 flow [2020-10-16 05:56:49,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 05:56:49,775 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:49,776 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:49,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 05:56:49,990 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:49,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:49,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1295301725, now seen corresponding path program 1 times [2020-10-16 05:56:49,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:49,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220637033] [2020-10-16 05:56:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:50,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220637033] [2020-10-16 05:56:50,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260990694] [2020-10-16 05:56:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:50,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 05:56:50,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:50,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:50,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 05:56:50,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633419743] [2020-10-16 05:56:50,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 05:56:50,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:50,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 05:56:50,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 05:56:50,164 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:56:50,165 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 305 flow. Second operand 12 states. [2020-10-16 05:56:50,165 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:50,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:56:50,165 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:50,550 INFO L129 PetriNetUnfolder]: 1042/2930 cut-off events. [2020-10-16 05:56:50,550 INFO L130 PetriNetUnfolder]: For 1504/1504 co-relation queries the response was YES. [2020-10-16 05:56:50,559 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7242 conditions, 2930 events. 1042/2930 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21244 event pairs, 566 based on Foata normal form. 1/2676 useless extension candidates. Maximal degree in co-relation 7168. Up to 1302 conditions per place. [2020-10-16 05:56:50,566 INFO L132 encePairwiseOnDemand]: 180/186 looper letters, 10 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2020-10-16 05:56:50,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 64 transitions, 367 flow [2020-10-16 05:56:50,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 05:56:50,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 05:56:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 980 transitions. [2020-10-16 05:56:50,568 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6586021505376344 [2020-10-16 05:56:50,568 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 980 transitions. [2020-10-16 05:56:50,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 980 transitions. [2020-10-16 05:56:50,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:50,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 980 transitions. [2020-10-16 05:56:50,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 05:56:50,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 05:56:50,571 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 05:56:50,571 INFO L185 Difference]: Start difference. First operand has 75 places, 58 transitions, 305 flow. Second operand 8 states and 980 transitions. [2020-10-16 05:56:50,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 64 transitions, 367 flow [2020-10-16 05:56:50,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 64 transitions, 353 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 05:56:50,580 INFO L241 Difference]: Finished difference. Result has 80 places, 60 transitions, 338 flow [2020-10-16 05:56:50,581 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2020-10-16 05:56:50,584 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2020-10-16 05:56:50,585 INFO L481 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 338 flow [2020-10-16 05:56:50,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 05:56:50,585 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:50,585 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:50,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:50,800 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:50,800 INFO L82 PathProgramCache]: Analyzing trace with hash -703139369, now seen corresponding path program 1 times [2020-10-16 05:56:50,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:50,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469293972] [2020-10-16 05:56:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 05:56:50,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469293972] [2020-10-16 05:56:50,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120824948] [2020-10-16 05:56:50,838 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 [2020-10-16 05:56:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:50,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:56:50,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 05:56:50,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:50,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 05:56:50,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108650066] [2020-10-16 05:56:50,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 05:56:50,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:50,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 05:56:50,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 05:56:50,935 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:56:50,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 338 flow. Second operand 7 states. [2020-10-16 05:56:50,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:50,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:56:50,935 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:51,253 INFO L129 PetriNetUnfolder]: 1108/3347 cut-off events. [2020-10-16 05:56:51,253 INFO L130 PetriNetUnfolder]: For 3282/3282 co-relation queries the response was YES. [2020-10-16 05:56:51,265 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9178 conditions, 3347 events. 1108/3347 cut-off events. For 3282/3282 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 26330 event pairs, 658 based on Foata normal form. 26/3126 useless extension candidates. Maximal degree in co-relation 4638. Up to 1309 conditions per place. [2020-10-16 05:56:51,274 INFO L132 encePairwiseOnDemand]: 179/186 looper letters, 14 selfloop transitions, 9 changer transitions 0/66 dead transitions. [2020-10-16 05:56:51,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 66 transitions, 413 flow [2020-10-16 05:56:51,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:56:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:56:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 621 transitions. [2020-10-16 05:56:51,275 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.667741935483871 [2020-10-16 05:56:51,275 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 621 transitions. [2020-10-16 05:56:51,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 621 transitions. [2020-10-16 05:56:51,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:51,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 621 transitions. [2020-10-16 05:56:51,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:56:51,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:56:51,278 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:56:51,278 INFO L185 Difference]: Start difference. First operand has 80 places, 60 transitions, 338 flow. Second operand 5 states and 621 transitions. [2020-10-16 05:56:51,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 66 transitions, 413 flow [2020-10-16 05:56:51,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 66 transitions, 389 flow, removed 8 selfloop flow, removed 4 redundant places. [2020-10-16 05:56:51,289 INFO L241 Difference]: Finished difference. Result has 81 places, 62 transitions, 355 flow [2020-10-16 05:56:51,289 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2020-10-16 05:56:51,289 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 21 predicate places. [2020-10-16 05:56:51,289 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 355 flow [2020-10-16 05:56:51,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 05:56:51,290 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:51,290 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:51,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 05:56:51,503 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:51,503 INFO L82 PathProgramCache]: Analyzing trace with hash -436182876, now seen corresponding path program 1 times [2020-10-16 05:56:51,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:51,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819633547] [2020-10-16 05:56:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:51,514 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:51,522 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:51,528 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:51,528 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:51,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-16 05:56:51,528 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:51,529 WARN L371 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:51,529 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2020-10-16 05:56:51,541 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,541 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,542 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,542 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,542 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,542 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,542 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,542 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,542 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,543 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,543 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,543 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,543 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,543 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,543 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,544 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,544 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,544 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,544 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,544 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,544 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,545 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,545 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,545 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,545 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,545 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,545 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,545 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,545 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,546 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,546 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,546 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,546 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,546 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,546 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,546 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,546 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,547 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,547 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,547 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,547 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,547 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,548 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,548 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,548 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,548 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,549 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,549 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,549 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,549 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,549 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,549 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,549 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,549 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,549 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,550 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,550 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,550 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,550 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,550 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,550 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,550 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,551 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,551 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,551 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,551 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,552 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,552 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,553 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,553 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,553 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,553 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,553 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,555 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,555 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,555 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,555 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,555 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,556 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,556 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,556 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,556 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,557 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,557 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,558 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,558 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,558 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,558 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,559 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,559 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,559 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,559 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,559 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,560 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,560 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,561 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,561 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,561 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,562 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,562 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,562 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,562 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,562 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,563 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,563 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,563 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,563 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,563 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:51,570 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:51,571 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:51,571 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:51,571 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:51,571 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:51,571 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:51,571 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:51,571 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:51,571 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:51,572 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 131 places, 127 transitions, 398 flow [2020-10-16 05:56:53,171 INFO L129 PetriNetUnfolder]: 3861/18336 cut-off events. [2020-10-16 05:56:53,171 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 05:56:53,261 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 205615 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. [2020-10-16 05:56:53,261 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 127 transitions, 398 flow [2020-10-16 05:56:54,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 120 transitions, 384 flow [2020-10-16 05:56:54,651 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:54,651 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 120 transitions, 384 flow [2020-10-16 05:56:54,651 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 120 transitions, 384 flow [2020-10-16 05:56:54,651 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 125 places, 120 transitions, 384 flow [2020-10-16 05:56:55,830 INFO L129 PetriNetUnfolder]: 3349/14752 cut-off events. [2020-10-16 05:56:55,830 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 05:56:55,904 INFO L80 FinitePrefix]: Finished finitePrefix Result has 17129 conditions, 14752 events. 3349/14752 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 156456 event pairs, 1291 based on Foata normal form. 0/12683 useless extension candidates. Maximal degree in co-relation 8380. Up to 2304 conditions per place. [2020-10-16 05:56:56,241 INFO L117 LiptonReduction]: Number of co-enabled transitions 5940 [2020-10-16 05:56:57,769 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-16 05:56:57,909 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 05:56:57,929 INFO L132 LiptonReduction]: Checked pairs total: 28628 [2020-10-16 05:56:57,929 INFO L134 LiptonReduction]: Total number of compositions: 71 [2020-10-16 05:56:57,929 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 3278 [2020-10-16 05:56:57,930 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 05:56:57,930 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:57,930 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:57,930 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:57,930 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:57,930 INFO L82 PathProgramCache]: Analyzing trace with hash 50460177, now seen corresponding path program 1 times [2020-10-16 05:56:57,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:57,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7463659] [2020-10-16 05:56:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:57,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7463659] [2020-10-16 05:56:57,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:57,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:57,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388090186] [2020-10-16 05:56:57,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:57,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:57,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:57,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:57,962 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:56:57,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 258 flow. Second operand 3 states. [2020-10-16 05:56:57,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:57,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:56:57,962 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:58,412 INFO L129 PetriNetUnfolder]: 2313/5449 cut-off events. [2020-10-16 05:56:58,412 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 05:56:58,429 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10415 conditions, 5449 events. 2313/5449 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 39806 event pairs, 1291 based on Foata normal form. 0/4416 useless extension candidates. Maximal degree in co-relation 5018. Up to 2587 conditions per place. [2020-10-16 05:56:58,445 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 9 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2020-10-16 05:56:58,445 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 284 flow [2020-10-16 05:56:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:58,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:58,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2020-10-16 05:56:58,446 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2020-10-16 05:56:58,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2020-10-16 05:56:58,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2020-10-16 05:56:58,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:58,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2020-10-16 05:56:58,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:58,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:58,448 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:58,448 INFO L185 Difference]: Start difference. First operand has 66 places, 57 transitions, 258 flow. Second operand 3 states and 402 transitions. [2020-10-16 05:56:58,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 284 flow [2020-10-16 05:56:58,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:58,453 INFO L241 Difference]: Finished difference. Result has 69 places, 58 transitions, 270 flow [2020-10-16 05:56:58,453 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2020-10-16 05:56:58,453 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2020-10-16 05:56:58,453 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 270 flow [2020-10-16 05:56:58,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:58,453 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:58,453 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:58,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-16 05:56:58,454 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:58,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:58,454 INFO L82 PathProgramCache]: Analyzing trace with hash -93476314, now seen corresponding path program 1 times [2020-10-16 05:56:58,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:58,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268365252] [2020-10-16 05:56:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:58,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268365252] [2020-10-16 05:56:58,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:58,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:58,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691911950] [2020-10-16 05:56:58,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:58,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:58,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:58,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:58,476 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:56:58,476 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 270 flow. Second operand 4 states. [2020-10-16 05:56:58,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:58,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:56:58,477 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:58,999 INFO L129 PetriNetUnfolder]: 2340/6073 cut-off events. [2020-10-16 05:56:58,999 INFO L130 PetriNetUnfolder]: For 2505/2505 co-relation queries the response was YES. [2020-10-16 05:56:59,014 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11649 conditions, 6073 events. 2340/6073 cut-off events. For 2505/2505 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47741 event pairs, 1327 based on Foata normal form. 0/5051 useless extension candidates. Maximal degree in co-relation 11623. Up to 2609 conditions per place. [2020-10-16 05:56:59,028 INFO L132 encePairwiseOnDemand]: 191/198 looper letters, 8 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2020-10-16 05:56:59,028 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 62 transitions, 306 flow [2020-10-16 05:56:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:59,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 536 transitions. [2020-10-16 05:56:59,029 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2020-10-16 05:56:59,029 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 536 transitions. [2020-10-16 05:56:59,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 536 transitions. [2020-10-16 05:56:59,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:59,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 536 transitions. [2020-10-16 05:56:59,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:59,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:59,032 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:59,032 INFO L185 Difference]: Start difference. First operand has 69 places, 58 transitions, 270 flow. Second operand 4 states and 536 transitions. [2020-10-16 05:56:59,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 62 transitions, 306 flow [2020-10-16 05:56:59,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:59,035 INFO L241 Difference]: Finished difference. Result has 72 places, 60 transitions, 296 flow [2020-10-16 05:56:59,035 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2020-10-16 05:56:59,035 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2020-10-16 05:56:59,035 INFO L481 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 296 flow [2020-10-16 05:56:59,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:59,036 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:59,036 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:59,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-16 05:56:59,036 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:59,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:59,036 INFO L82 PathProgramCache]: Analyzing trace with hash 637668557, now seen corresponding path program 1 times [2020-10-16 05:56:59,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:59,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100270281] [2020-10-16 05:56:59,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:59,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100270281] [2020-10-16 05:56:59,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118453010] [2020-10-16 05:56:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:59,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:56:59,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:59,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:59,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:56:59,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077745281] [2020-10-16 05:56:59,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:56:59,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:59,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:56:59,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:56:59,177 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:56:59,177 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 296 flow. Second operand 6 states. [2020-10-16 05:56:59,177 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:59,177 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:56:59,178 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:59,662 INFO L129 PetriNetUnfolder]: 2339/6068 cut-off events. [2020-10-16 05:56:59,662 INFO L130 PetriNetUnfolder]: For 3060/3060 co-relation queries the response was YES. [2020-10-16 05:56:59,685 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14795 conditions, 6068 events. 2339/6068 cut-off events. For 3060/3060 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47628 event pairs, 1327 based on Foata normal form. 1/5558 useless extension candidates. Maximal degree in co-relation 7510. Up to 3134 conditions per place. [2020-10-16 05:56:59,702 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 12 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2020-10-16 05:56:59,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 334 flow [2020-10-16 05:56:59,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:59,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:59,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 534 transitions. [2020-10-16 05:56:59,704 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2020-10-16 05:56:59,704 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 534 transitions. [2020-10-16 05:56:59,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 534 transitions. [2020-10-16 05:56:59,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:59,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 534 transitions. [2020-10-16 05:56:59,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:59,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:59,706 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:59,706 INFO L185 Difference]: Start difference. First operand has 72 places, 60 transitions, 296 flow. Second operand 4 states and 534 transitions. [2020-10-16 05:56:59,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 334 flow [2020-10-16 05:56:59,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 63 transitions, 333 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:59,711 INFO L241 Difference]: Finished difference. Result has 75 places, 61 transitions, 311 flow [2020-10-16 05:56:59,711 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=311, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2020-10-16 05:56:59,711 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2020-10-16 05:56:59,711 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 311 flow [2020-10-16 05:56:59,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:56:59,711 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:59,712 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:59,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:59,912 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:59,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:59,913 INFO L82 PathProgramCache]: Analyzing trace with hash -400747775, now seen corresponding path program 1 times [2020-10-16 05:56:59,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:59,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971404011] [2020-10-16 05:56:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:59,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971404011] [2020-10-16 05:56:59,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529570402] [2020-10-16 05:56:59,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:00,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:57:00,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:00,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:00,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 05:57:00,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989682676] [2020-10-16 05:57:00,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 05:57:00,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:00,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 05:57:00,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 05:57:00,049 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:57:00,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 311 flow. Second operand 8 states. [2020-10-16 05:57:00,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:00,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:57:00,050 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:00,656 INFO L129 PetriNetUnfolder]: 2337/6060 cut-off events. [2020-10-16 05:57:00,656 INFO L130 PetriNetUnfolder]: For 3079/3079 co-relation queries the response was YES. [2020-10-16 05:57:00,672 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14794 conditions, 6060 events. 2337/6060 cut-off events. For 3079/3079 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47598 event pairs, 1328 based on Foata normal form. 1/5550 useless extension candidates. Maximal degree in co-relation 14750. Up to 3128 conditions per place. [2020-10-16 05:57:00,688 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 13 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2020-10-16 05:57:00,688 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 65 transitions, 357 flow [2020-10-16 05:57:00,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:57:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:57:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 666 transitions. [2020-10-16 05:57:00,689 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2020-10-16 05:57:00,689 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 666 transitions. [2020-10-16 05:57:00,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 666 transitions. [2020-10-16 05:57:00,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:00,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 666 transitions. [2020-10-16 05:57:00,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:57:00,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:57:00,691 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:57:00,691 INFO L185 Difference]: Start difference. First operand has 75 places, 61 transitions, 311 flow. Second operand 5 states and 666 transitions. [2020-10-16 05:57:00,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 65 transitions, 357 flow [2020-10-16 05:57:00,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 65 transitions, 351 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 05:57:00,696 INFO L241 Difference]: Finished difference. Result has 78 places, 62 transitions, 325 flow [2020-10-16 05:57:00,696 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=78, PETRI_TRANSITIONS=62} [2020-10-16 05:57:00,696 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2020-10-16 05:57:00,696 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 62 transitions, 325 flow [2020-10-16 05:57:00,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 05:57:00,696 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:00,697 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:00,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 05:57:00,902 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:00,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:00,902 INFO L82 PathProgramCache]: Analyzing trace with hash 475549348, now seen corresponding path program 1 times [2020-10-16 05:57:00,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:00,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255300003] [2020-10-16 05:57:00,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:00,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255300003] [2020-10-16 05:57:00,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774126268] [2020-10-16 05:57:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:01,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 05:57:01,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:01,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:01,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 05:57:01,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487527810] [2020-10-16 05:57:01,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 05:57:01,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:01,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 05:57:01,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 05:57:01,101 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:57:01,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 62 transitions, 325 flow. Second operand 10 states. [2020-10-16 05:57:01,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:01,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:57:01,102 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:01,639 INFO L129 PetriNetUnfolder]: 2334/6049 cut-off events. [2020-10-16 05:57:01,639 INFO L130 PetriNetUnfolder]: For 3096/3096 co-relation queries the response was YES. [2020-10-16 05:57:01,664 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14781 conditions, 6049 events. 2334/6049 cut-off events. For 3096/3096 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47816 event pairs, 1332 based on Foata normal form. 1/5539 useless extension candidates. Maximal degree in co-relation 14722. Up to 3121 conditions per place. [2020-10-16 05:57:01,682 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 14 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2020-10-16 05:57:01,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 67 transitions, 379 flow [2020-10-16 05:57:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 05:57:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 05:57:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 798 transitions. [2020-10-16 05:57:01,683 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6717171717171717 [2020-10-16 05:57:01,683 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 798 transitions. [2020-10-16 05:57:01,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 798 transitions. [2020-10-16 05:57:01,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:01,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 798 transitions. [2020-10-16 05:57:01,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 05:57:01,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 05:57:01,686 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 05:57:01,686 INFO L185 Difference]: Start difference. First operand has 78 places, 62 transitions, 325 flow. Second operand 6 states and 798 transitions. [2020-10-16 05:57:01,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 67 transitions, 379 flow [2020-10-16 05:57:01,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 67 transitions, 369 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 05:57:01,690 INFO L241 Difference]: Finished difference. Result has 81 places, 63 transitions, 339 flow [2020-10-16 05:57:01,690 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2020-10-16 05:57:01,690 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2020-10-16 05:57:01,691 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 339 flow [2020-10-16 05:57:01,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 05:57:01,691 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:01,691 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:01,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-10-16 05:57:01,892 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:01,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:01,892 INFO L82 PathProgramCache]: Analyzing trace with hash 873129670, now seen corresponding path program 1 times [2020-10-16 05:57:01,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:01,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973426045] [2020-10-16 05:57:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:01,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973426045] [2020-10-16 05:57:01,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685785186] [2020-10-16 05:57:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:02,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 05:57:02,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:02,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:02,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 05:57:02,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275754878] [2020-10-16 05:57:02,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 05:57:02,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:02,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 05:57:02,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 05:57:02,139 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:57:02,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 339 flow. Second operand 12 states. [2020-10-16 05:57:02,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:02,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:57:02,141 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:02,943 INFO L129 PetriNetUnfolder]: 2330/6035 cut-off events. [2020-10-16 05:57:02,943 INFO L130 PetriNetUnfolder]: For 3111/3111 co-relation queries the response was YES. [2020-10-16 05:57:02,971 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14757 conditions, 6035 events. 2330/6035 cut-off events. For 3111/3111 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 48189 event pairs, 1343 based on Foata normal form. 1/5525 useless extension candidates. Maximal degree in co-relation 14682. Up to 2592 conditions per place. [2020-10-16 05:57:02,992 INFO L132 encePairwiseOnDemand]: 192/198 looper letters, 10 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2020-10-16 05:57:02,992 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 69 transitions, 401 flow [2020-10-16 05:57:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 05:57:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 05:57:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1060 transitions. [2020-10-16 05:57:02,994 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6691919191919192 [2020-10-16 05:57:02,994 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1060 transitions. [2020-10-16 05:57:02,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1060 transitions. [2020-10-16 05:57:02,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:02,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1060 transitions. [2020-10-16 05:57:02,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 05:57:02,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 05:57:02,997 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 05:57:02,997 INFO L185 Difference]: Start difference. First operand has 81 places, 63 transitions, 339 flow. Second operand 8 states and 1060 transitions. [2020-10-16 05:57:02,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 69 transitions, 401 flow [2020-10-16 05:57:03,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 69 transitions, 387 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 05:57:03,004 INFO L241 Difference]: Finished difference. Result has 86 places, 65 transitions, 372 flow [2020-10-16 05:57:03,005 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=372, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2020-10-16 05:57:03,005 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 20 predicate places. [2020-10-16 05:57:03,005 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 372 flow [2020-10-16 05:57:03,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 05:57:03,005 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:03,005 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:03,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:03,206 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:03,207 INFO L82 PathProgramCache]: Analyzing trace with hash 921562965, now seen corresponding path program 1 times [2020-10-16 05:57:03,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:03,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072114291] [2020-10-16 05:57:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 05:57:03,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072114291] [2020-10-16 05:57:03,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666711855] [2020-10-16 05:57:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:57:03,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 05:57:03,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:03,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 05:57:03,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342030762] [2020-10-16 05:57:03,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 05:57:03,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:03,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 05:57:03,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 05:57:03,392 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:57:03,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 372 flow. Second operand 7 states. [2020-10-16 05:57:03,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:03,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:57:03,393 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:04,371 INFO L129 PetriNetUnfolder]: 2443/6823 cut-off events. [2020-10-16 05:57:04,371 INFO L130 PetriNetUnfolder]: For 6446/6446 co-relation queries the response was YES. [2020-10-16 05:57:04,401 INFO L80 FinitePrefix]: Finished finitePrefix Result has 18511 conditions, 6823 events. 2443/6823 cut-off events. For 6446/6446 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 58647 event pairs, 1491 based on Foata normal form. 35/6356 useless extension candidates. Maximal degree in co-relation 9324. Up to 2621 conditions per place. [2020-10-16 05:57:04,421 INFO L132 encePairwiseOnDemand]: 191/198 looper letters, 14 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2020-10-16 05:57:04,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 71 transitions, 447 flow [2020-10-16 05:57:04,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:57:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:57:04,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 671 transitions. [2020-10-16 05:57:04,423 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2020-10-16 05:57:04,423 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 671 transitions. [2020-10-16 05:57:04,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 671 transitions. [2020-10-16 05:57:04,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:04,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 671 transitions. [2020-10-16 05:57:04,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:57:04,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:57:04,424 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:57:04,425 INFO L185 Difference]: Start difference. First operand has 86 places, 65 transitions, 372 flow. Second operand 5 states and 671 transitions. [2020-10-16 05:57:04,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 71 transitions, 447 flow [2020-10-16 05:57:04,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 71 transitions, 423 flow, removed 8 selfloop flow, removed 4 redundant places. [2020-10-16 05:57:04,438 INFO L241 Difference]: Finished difference. Result has 87 places, 67 transitions, 389 flow [2020-10-16 05:57:04,438 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=87, PETRI_TRANSITIONS=67} [2020-10-16 05:57:04,439 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 21 predicate places. [2020-10-16 05:57:04,439 INFO L481 AbstractCegarLoop]: Abstraction has has 87 places, 67 transitions, 389 flow [2020-10-16 05:57:04,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 05:57:04,439 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:04,439 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:04,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-16 05:57:04,647 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:04,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:04,647 INFO L82 PathProgramCache]: Analyzing trace with hash 2001719838, now seen corresponding path program 1 times [2020-10-16 05:57:04,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:04,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665306545] [2020-10-16 05:57:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:57:04,659 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:57:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:57:04,667 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:57:04,673 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:57:04,673 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:57:04,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-16 05:57:04,673 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:57:04,674 WARN L371 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:57:04,674 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2020-10-16 05:57:04,690 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,690 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,690 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,690 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,690 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,691 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,691 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,691 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,691 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,691 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,691 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,691 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,692 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,692 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,692 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,692 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,692 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,692 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,692 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,692 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,693 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,693 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,693 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,693 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,693 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,693 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,693 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,693 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,694 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,694 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,694 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,694 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,694 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,694 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,694 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,694 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,695 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,695 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,695 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,695 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,695 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,695 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,702 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,702 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,702 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,703 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,703 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,703 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,703 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,703 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,703 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,703 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,703 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,704 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,704 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,704 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,704 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,704 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,704 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,704 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,704 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,704 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,704 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,704 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,704 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,705 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,705 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,705 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,705 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,705 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,705 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,705 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,705 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,705 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,705 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,706 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,706 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,707 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,707 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,707 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,707 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,707 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,708 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,708 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,708 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,708 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,708 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,709 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,709 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,709 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,709 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,710 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,710 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,710 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,710 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,711 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,711 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,711 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,711 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,712 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,713 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,713 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,713 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,713 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,713 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,714 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,714 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,714 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,714 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,714 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,715 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,715 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,715 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,715 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,715 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,716 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,717 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,717 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,717 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,717 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:04,724 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:57:04,724 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:57:04,724 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:57:04,724 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:57:04,725 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:57:04,725 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:57:04,725 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:57:04,725 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:57:04,725 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:57:04,727 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 139 places, 134 transitions, 438 flow [2020-10-16 05:57:08,867 INFO L129 PetriNetUnfolder]: 8215/37039 cut-off events. [2020-10-16 05:57:08,868 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-16 05:57:09,011 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 468035 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. [2020-10-16 05:57:09,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 134 transitions, 438 flow [2020-10-16 05:57:09,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 127 transitions, 424 flow [2020-10-16 05:57:09,082 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:57:09,082 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 127 transitions, 424 flow [2020-10-16 05:57:09,083 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 127 transitions, 424 flow [2020-10-16 05:57:09,083 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 133 places, 127 transitions, 424 flow [2020-10-16 05:57:13,575 INFO L129 PetriNetUnfolder]: 7191/29871 cut-off events. [2020-10-16 05:57:13,575 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-16 05:57:13,702 INFO L80 FinitePrefix]: Finished finitePrefix Result has 35077 conditions, 29871 events. 7191/29871 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 356661 event pairs, 3084 based on Foata normal form. 0/25752 useless extension candidates. Maximal degree in co-relation 17110. Up to 5120 conditions per place. [2020-10-16 05:57:14,158 INFO L117 LiptonReduction]: Number of co-enabled transitions 7000 [2020-10-16 05:57:15,878 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-16 05:57:16,094 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-16 05:57:16,169 INFO L132 LiptonReduction]: Checked pairs total: 33303 [2020-10-16 05:57:16,169 INFO L134 LiptonReduction]: Total number of compositions: 69 [2020-10-16 05:57:16,169 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 7087 [2020-10-16 05:57:16,170 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 05:57:16,170 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:57:16,170 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:16,170 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:57:16,170 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:16,171 INFO L82 PathProgramCache]: Analyzing trace with hash 56928945, now seen corresponding path program 1 times [2020-10-16 05:57:16,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:16,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83388206] [2020-10-16 05:57:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:57:16,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83388206] [2020-10-16 05:57:16,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:57:16,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:57:16,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888958623] [2020-10-16 05:57:16,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:57:16,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:16,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:57:16,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:57:16,194 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:16,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 294 flow. Second operand 3 states. [2020-10-16 05:57:16,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:16,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:16,195 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:17,405 INFO L129 PetriNetUnfolder]: 5130/11345 cut-off events. [2020-10-16 05:57:17,406 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-16 05:57:17,432 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21703 conditions, 11345 events. 5130/11345 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 91343 event pairs, 3084 based on Foata normal form. 0/9287 useless extension candidates. Maximal degree in co-relation 10417. Up to 5150 conditions per place. [2020-10-16 05:57:17,464 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 9 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2020-10-16 05:57:17,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 320 flow [2020-10-16 05:57:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:57:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:57:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2020-10-16 05:57:17,465 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6995073891625616 [2020-10-16 05:57:17,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2020-10-16 05:57:17,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2020-10-16 05:57:17,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:17,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2020-10-16 05:57:17,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:57:17,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:57:17,467 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:57:17,467 INFO L185 Difference]: Start difference. First operand has 72 places, 62 transitions, 294 flow. Second operand 3 states and 426 transitions. [2020-10-16 05:57:17,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 320 flow [2020-10-16 05:57:17,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 64 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:57:17,475 INFO L241 Difference]: Finished difference. Result has 75 places, 63 transitions, 306 flow [2020-10-16 05:57:17,475 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2020-10-16 05:57:17,475 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2020-10-16 05:57:17,475 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 306 flow [2020-10-16 05:57:17,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:57:17,475 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:17,475 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:17,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-16 05:57:17,476 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:17,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:17,476 INFO L82 PathProgramCache]: Analyzing trace with hash 277330913, now seen corresponding path program 1 times [2020-10-16 05:57:17,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:17,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971980134] [2020-10-16 05:57:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:57:17,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971980134] [2020-10-16 05:57:17,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:57:17,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:57:17,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757098432] [2020-10-16 05:57:17,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:57:17,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:17,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:57:17,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:57:17,500 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:17,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 306 flow. Second operand 4 states. [2020-10-16 05:57:17,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:17,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:17,501 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:18,510 INFO L129 PetriNetUnfolder]: 5165/12509 cut-off events. [2020-10-16 05:57:18,511 INFO L130 PetriNetUnfolder]: For 5385/5385 co-relation queries the response was YES. [2020-10-16 05:57:18,567 INFO L80 FinitePrefix]: Finished finitePrefix Result has 24010 conditions, 12509 events. 5165/12509 cut-off events. For 5385/5385 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108501 event pairs, 3129 based on Foata normal form. 0/10463 useless extension candidates. Maximal degree in co-relation 23983. Up to 5180 conditions per place. [2020-10-16 05:57:18,606 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 8 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2020-10-16 05:57:18,606 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 67 transitions, 342 flow [2020-10-16 05:57:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:57:18,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:57:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 568 transitions. [2020-10-16 05:57:18,607 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6995073891625616 [2020-10-16 05:57:18,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 568 transitions. [2020-10-16 05:57:18,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 568 transitions. [2020-10-16 05:57:18,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:18,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 568 transitions. [2020-10-16 05:57:18,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:57:18,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:57:18,609 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:57:18,609 INFO L185 Difference]: Start difference. First operand has 75 places, 63 transitions, 306 flow. Second operand 4 states and 568 transitions. [2020-10-16 05:57:18,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 67 transitions, 342 flow [2020-10-16 05:57:18,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:57:18,618 INFO L241 Difference]: Finished difference. Result has 78 places, 65 transitions, 332 flow [2020-10-16 05:57:18,618 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2020-10-16 05:57:18,618 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2020-10-16 05:57:18,618 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 332 flow [2020-10-16 05:57:18,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:57:18,618 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:18,618 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:18,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-16 05:57:18,619 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:18,619 INFO L82 PathProgramCache]: Analyzing trace with hash -190386445, now seen corresponding path program 1 times [2020-10-16 05:57:18,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:18,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420264343] [2020-10-16 05:57:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:18,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420264343] [2020-10-16 05:57:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075254432] [2020-10-16 05:57:18,644 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 [2020-10-16 05:57:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:18,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:57:18,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:18,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:18,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:57:18,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928395166] [2020-10-16 05:57:18,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:57:18,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:18,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:57:18,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:57:18,751 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:18,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 65 transitions, 332 flow. Second operand 6 states. [2020-10-16 05:57:18,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:18,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:18,752 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:19,958 INFO L129 PetriNetUnfolder]: 5164/12504 cut-off events. [2020-10-16 05:57:19,958 INFO L130 PetriNetUnfolder]: For 6462/6462 co-relation queries the response was YES. [2020-10-16 05:57:20,003 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30248 conditions, 12504 events. 5164/12504 cut-off events. For 6462/6462 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108070 event pairs, 3129 based on Foata normal form. 1/11482 useless extension candidates. Maximal degree in co-relation 15456. Up to 6219 conditions per place. [2020-10-16 05:57:20,041 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 12 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2020-10-16 05:57:20,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 68 transitions, 370 flow [2020-10-16 05:57:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:57:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:57:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 566 transitions. [2020-10-16 05:57:20,042 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6970443349753694 [2020-10-16 05:57:20,042 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 566 transitions. [2020-10-16 05:57:20,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 566 transitions. [2020-10-16 05:57:20,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:20,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 566 transitions. [2020-10-16 05:57:20,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:57:20,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:57:20,044 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:57:20,044 INFO L185 Difference]: Start difference. First operand has 78 places, 65 transitions, 332 flow. Second operand 4 states and 566 transitions. [2020-10-16 05:57:20,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 68 transitions, 370 flow [2020-10-16 05:57:20,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 68 transitions, 369 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:57:20,050 INFO L241 Difference]: Finished difference. Result has 81 places, 66 transitions, 347 flow [2020-10-16 05:57:20,050 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=347, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2020-10-16 05:57:20,051 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2020-10-16 05:57:20,051 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 347 flow [2020-10-16 05:57:20,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:57:20,051 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:20,051 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:20,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 05:57:20,252 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:20,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:20,252 INFO L82 PathProgramCache]: Analyzing trace with hash 495797898, now seen corresponding path program 1 times [2020-10-16 05:57:20,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:20,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089929515] [2020-10-16 05:57:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:20,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089929515] [2020-10-16 05:57:20,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857256277] [2020-10-16 05:57:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:20,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:57:20,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:20,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:20,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 05:57:20,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509953485] [2020-10-16 05:57:20,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 05:57:20,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:20,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 05:57:20,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 05:57:20,407 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:20,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 347 flow. Second operand 8 states. [2020-10-16 05:57:20,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:20,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:20,408 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:21,508 INFO L129 PetriNetUnfolder]: 5162/12496 cut-off events. [2020-10-16 05:57:21,508 INFO L130 PetriNetUnfolder]: For 6483/6483 co-relation queries the response was YES. [2020-10-16 05:57:21,572 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30249 conditions, 12496 events. 5162/12496 cut-off events. For 6483/6483 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108143 event pairs, 3130 based on Foata normal form. 1/11474 useless extension candidates. Maximal degree in co-relation 30204. Up to 6213 conditions per place. [2020-10-16 05:57:21,616 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 13 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2020-10-16 05:57:21,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 70 transitions, 393 flow [2020-10-16 05:57:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:57:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:57:21,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 706 transitions. [2020-10-16 05:57:21,618 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6955665024630542 [2020-10-16 05:57:21,618 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 706 transitions. [2020-10-16 05:57:21,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 706 transitions. [2020-10-16 05:57:21,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:21,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 706 transitions. [2020-10-16 05:57:21,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:57:21,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:57:21,620 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:57:21,620 INFO L185 Difference]: Start difference. First operand has 81 places, 66 transitions, 347 flow. Second operand 5 states and 706 transitions. [2020-10-16 05:57:21,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 70 transitions, 393 flow [2020-10-16 05:57:21,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 70 transitions, 387 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 05:57:21,628 INFO L241 Difference]: Finished difference. Result has 84 places, 67 transitions, 361 flow [2020-10-16 05:57:21,629 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=84, PETRI_TRANSITIONS=67} [2020-10-16 05:57:21,629 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 12 predicate places. [2020-10-16 05:57:21,629 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 67 transitions, 361 flow [2020-10-16 05:57:21,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 05:57:21,629 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:21,629 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:21,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:21,830 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:21,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:21,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1773387480, now seen corresponding path program 1 times [2020-10-16 05:57:21,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:21,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134434223] [2020-10-16 05:57:21,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:21,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134434223] [2020-10-16 05:57:21,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017153442] [2020-10-16 05:57:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:21,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 05:57:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:22,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:22,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 05:57:22,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104073896] [2020-10-16 05:57:22,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 05:57:22,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:22,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 05:57:22,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 05:57:22,013 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:22,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 67 transitions, 361 flow. Second operand 10 states. [2020-10-16 05:57:22,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:22,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:22,014 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:23,257 INFO L129 PetriNetUnfolder]: 5159/12485 cut-off events. [2020-10-16 05:57:23,258 INFO L130 PetriNetUnfolder]: For 6503/6503 co-relation queries the response was YES. [2020-10-16 05:57:23,308 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30238 conditions, 12485 events. 5159/12485 cut-off events. For 6503/6503 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108249 event pairs, 3134 based on Foata normal form. 1/11463 useless extension candidates. Maximal degree in co-relation 30178. Up to 6206 conditions per place. [2020-10-16 05:57:23,346 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 14 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2020-10-16 05:57:23,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 72 transitions, 415 flow [2020-10-16 05:57:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 05:57:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 05:57:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 846 transitions. [2020-10-16 05:57:23,348 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6945812807881774 [2020-10-16 05:57:23,348 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 846 transitions. [2020-10-16 05:57:23,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 846 transitions. [2020-10-16 05:57:23,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:23,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 846 transitions. [2020-10-16 05:57:23,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 05:57:23,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 05:57:23,350 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 05:57:23,350 INFO L185 Difference]: Start difference. First operand has 84 places, 67 transitions, 361 flow. Second operand 6 states and 846 transitions. [2020-10-16 05:57:23,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 72 transitions, 415 flow [2020-10-16 05:57:23,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 72 transitions, 405 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 05:57:23,359 INFO L241 Difference]: Finished difference. Result has 87 places, 68 transitions, 375 flow [2020-10-16 05:57:23,359 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=87, PETRI_TRANSITIONS=68} [2020-10-16 05:57:23,360 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2020-10-16 05:57:23,360 INFO L481 AbstractCegarLoop]: Abstraction has has 87 places, 68 transitions, 375 flow [2020-10-16 05:57:23,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 05:57:23,360 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:23,360 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:23,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:23,567 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:23,567 INFO L82 PathProgramCache]: Analyzing trace with hash 43326697, now seen corresponding path program 1 times [2020-10-16 05:57:23,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:23,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854220639] [2020-10-16 05:57:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:23,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854220639] [2020-10-16 05:57:23,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460462970] [2020-10-16 05:57:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:23,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 05:57:23,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:23,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:23,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 05:57:23,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968548381] [2020-10-16 05:57:23,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 05:57:23,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:23,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 05:57:23,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 05:57:23,786 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:23,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 68 transitions, 375 flow. Second operand 12 states. [2020-10-16 05:57:23,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:23,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:23,788 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:25,207 INFO L129 PetriNetUnfolder]: 5155/12471 cut-off events. [2020-10-16 05:57:25,208 INFO L130 PetriNetUnfolder]: For 6522/6522 co-relation queries the response was YES. [2020-10-16 05:57:25,272 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30216 conditions, 12471 events. 5155/12471 cut-off events. For 6522/6522 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108601 event pairs, 3145 based on Foata normal form. 1/11449 useless extension candidates. Maximal degree in co-relation 30140. Up to 5163 conditions per place. [2020-10-16 05:57:25,314 INFO L132 encePairwiseOnDemand]: 197/203 looper letters, 10 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2020-10-16 05:57:25,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 74 transitions, 437 flow [2020-10-16 05:57:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 05:57:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 05:57:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1124 transitions. [2020-10-16 05:57:25,316 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6921182266009852 [2020-10-16 05:57:25,316 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1124 transitions. [2020-10-16 05:57:25,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1124 transitions. [2020-10-16 05:57:25,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:25,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1124 transitions. [2020-10-16 05:57:25,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 05:57:25,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 05:57:25,319 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 05:57:25,319 INFO L185 Difference]: Start difference. First operand has 87 places, 68 transitions, 375 flow. Second operand 8 states and 1124 transitions. [2020-10-16 05:57:25,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 74 transitions, 437 flow [2020-10-16 05:57:25,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 74 transitions, 423 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 05:57:25,330 INFO L241 Difference]: Finished difference. Result has 92 places, 70 transitions, 408 flow [2020-10-16 05:57:25,331 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=408, PETRI_PLACES=92, PETRI_TRANSITIONS=70} [2020-10-16 05:57:25,331 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 20 predicate places. [2020-10-16 05:57:25,331 INFO L481 AbstractCegarLoop]: Abstraction has has 92 places, 70 transitions, 408 flow [2020-10-16 05:57:25,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 05:57:25,331 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:25,331 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:25,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:25,538 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:25,538 INFO L82 PathProgramCache]: Analyzing trace with hash 594075057, now seen corresponding path program 1 times [2020-10-16 05:57:25,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:25,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602047689] [2020-10-16 05:57:25,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 05:57:25,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602047689] [2020-10-16 05:57:25,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900741021] [2020-10-16 05:57:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:25,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:57:25,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 05:57:25,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:25,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 05:57:25,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014192556] [2020-10-16 05:57:25,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 05:57:25,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:25,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 05:57:25,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 05:57:25,687 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:25,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 70 transitions, 408 flow. Second operand 7 states. [2020-10-16 05:57:25,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:25,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:25,688 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:27,079 INFO L129 PetriNetUnfolder]: 5330/13919 cut-off events. [2020-10-16 05:57:27,079 INFO L130 PetriNetUnfolder]: For 12763/12763 co-relation queries the response was YES. [2020-10-16 05:57:27,148 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37401 conditions, 13919 events. 5330/13919 cut-off events. For 12763/12763 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 130019 event pairs, 3365 based on Foata normal form. 45/12951 useless extension candidates. Maximal degree in co-relation 18883. Up to 5375 conditions per place. [2020-10-16 05:57:27,191 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 14 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2020-10-16 05:57:27,191 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 76 transitions, 483 flow [2020-10-16 05:57:27,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:57:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:57:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 711 transitions. [2020-10-16 05:57:27,192 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7004926108374384 [2020-10-16 05:57:27,192 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 711 transitions. [2020-10-16 05:57:27,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 711 transitions. [2020-10-16 05:57:27,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:27,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 711 transitions. [2020-10-16 05:57:27,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:57:27,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:57:27,195 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:57:27,195 INFO L185 Difference]: Start difference. First operand has 92 places, 70 transitions, 408 flow. Second operand 5 states and 711 transitions. [2020-10-16 05:57:27,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 76 transitions, 483 flow [2020-10-16 05:57:27,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 76 transitions, 459 flow, removed 8 selfloop flow, removed 4 redundant places. [2020-10-16 05:57:27,218 INFO L241 Difference]: Finished difference. Result has 93 places, 72 transitions, 425 flow [2020-10-16 05:57:27,218 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=93, PETRI_TRANSITIONS=72} [2020-10-16 05:57:27,218 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 21 predicate places. [2020-10-16 05:57:27,218 INFO L481 AbstractCegarLoop]: Abstraction has has 93 places, 72 transitions, 425 flow [2020-10-16 05:57:27,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 05:57:27,218 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:27,218 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:27,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-10-16 05:57:27,419 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:27,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:27,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2031979255, now seen corresponding path program 1 times [2020-10-16 05:57:27,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:27,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022875360] [2020-10-16 05:57:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-16 05:57:27,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022875360] [2020-10-16 05:57:27,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870371215] [2020-10-16 05:57:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:27,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:57:27,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-16 05:57:27,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:27,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-10-16 05:57:27,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77239365] [2020-10-16 05:57:27,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 05:57:27,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:27,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 05:57:27,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-10-16 05:57:27,593 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:27,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 72 transitions, 425 flow. Second operand 9 states. [2020-10-16 05:57:27,594 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:27,594 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:27,594 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:29,197 INFO L129 PetriNetUnfolder]: 5790/15797 cut-off events. [2020-10-16 05:57:29,197 INFO L130 PetriNetUnfolder]: For 21329/21329 co-relation queries the response was YES. [2020-10-16 05:57:29,300 INFO L80 FinitePrefix]: Finished finitePrefix Result has 50568 conditions, 15797 events. 5790/15797 cut-off events. For 21329/21329 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 157387 event pairs, 3980 based on Foata normal form. 155/14984 useless extension candidates. Maximal degree in co-relation 25513. Up to 6215 conditions per place. [2020-10-16 05:57:29,354 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 15 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2020-10-16 05:57:29,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 80 transitions, 521 flow [2020-10-16 05:57:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 05:57:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 05:57:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 854 transitions. [2020-10-16 05:57:29,355 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2020-10-16 05:57:29,356 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 854 transitions. [2020-10-16 05:57:29,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 854 transitions. [2020-10-16 05:57:29,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:29,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 854 transitions. [2020-10-16 05:57:29,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 05:57:29,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 05:57:29,358 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 05:57:29,358 INFO L185 Difference]: Start difference. First operand has 93 places, 72 transitions, 425 flow. Second operand 6 states and 854 transitions. [2020-10-16 05:57:29,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 80 transitions, 521 flow [2020-10-16 05:57:29,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 80 transitions, 497 flow, removed 4 selfloop flow, removed 5 redundant places. [2020-10-16 05:57:29,402 INFO L241 Difference]: Finished difference. Result has 94 places, 74 transitions, 452 flow [2020-10-16 05:57:29,403 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=94, PETRI_TRANSITIONS=74} [2020-10-16 05:57:29,403 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 22 predicate places. [2020-10-16 05:57:29,403 INFO L481 AbstractCegarLoop]: Abstraction has has 94 places, 74 transitions, 452 flow [2020-10-16 05:57:29,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 05:57:29,403 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:29,403 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:29,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:29,610 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:29,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:29,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1529297233, now seen corresponding path program 1 times [2020-10-16 05:57:29,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:29,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735990173] [2020-10-16 05:57:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 163 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:57:29,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735990173] [2020-10-16 05:57:29,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84362778] [2020-10-16 05:57:29,728 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 [2020-10-16 05:57:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:29,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 05:57:29,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:57:30,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 05:57:30,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 23 [2020-10-16 05:57:30,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593358806] [2020-10-16 05:57:30,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 05:57:30,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:30,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 05:57:30,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2020-10-16 05:57:30,108 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:30,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 74 transitions, 452 flow. Second operand 13 states. [2020-10-16 05:57:30,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:30,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:30,110 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:34,876 INFO L129 PetriNetUnfolder]: 8000/34514 cut-off events. [2020-10-16 05:57:34,876 INFO L130 PetriNetUnfolder]: For 41105/41105 co-relation queries the response was YES. [2020-10-16 05:57:35,079 INFO L80 FinitePrefix]: Finished finitePrefix Result has 136378 conditions, 34514 events. 8000/34514 cut-off events. For 41105/41105 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 475498 event pairs, 7158 based on Foata normal form. 2/27740 useless extension candidates. Maximal degree in co-relation 71197. Up to 18423 conditions per place. [2020-10-16 05:57:35,174 INFO L132 encePairwiseOnDemand]: 195/203 looper letters, 28 selfloop transitions, 45 changer transitions 0/125 dead transitions. [2020-10-16 05:57:35,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 125 transitions, 961 flow [2020-10-16 05:57:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 05:57:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 05:57:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1870 transitions. [2020-10-16 05:57:35,177 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7086017430845017 [2020-10-16 05:57:35,177 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1870 transitions. [2020-10-16 05:57:35,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1870 transitions. [2020-10-16 05:57:35,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:35,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1870 transitions. [2020-10-16 05:57:35,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 05:57:35,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 05:57:35,182 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 05:57:35,183 INFO L185 Difference]: Start difference. First operand has 94 places, 74 transitions, 452 flow. Second operand 13 states and 1870 transitions. [2020-10-16 05:57:35,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 125 transitions, 961 flow [2020-10-16 05:57:35,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 125 transitions, 893 flow, removed 10 selfloop flow, removed 7 redundant places. [2020-10-16 05:57:35,240 INFO L241 Difference]: Finished difference. Result has 99 places, 101 transitions, 709 flow [2020-10-16 05:57:35,241 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=709, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2020-10-16 05:57:35,241 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 27 predicate places. [2020-10-16 05:57:35,241 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 709 flow [2020-10-16 05:57:35,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 05:57:35,241 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:35,241 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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] [2020-10-16 05:57:35,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-16 05:57:35,453 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:35,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:35,453 INFO L82 PathProgramCache]: Analyzing trace with hash 982291090, now seen corresponding path program 1 times [2020-10-16 05:57:35,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:35,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723443392] [2020-10-16 05:57:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-16 05:57:35,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723443392] [2020-10-16 05:57:35,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891612646] [2020-10-16 05:57:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:35,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 05:57:35,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-16 05:57:35,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:35,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-16 05:57:35,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149252561] [2020-10-16 05:57:35,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 05:57:35,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:35,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 05:57:35,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-10-16 05:57:35,656 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:35,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 709 flow. Second operand 11 states. [2020-10-16 05:57:35,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:35,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:35,657 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:41,282 INFO L129 PetriNetUnfolder]: 7795/31181 cut-off events. [2020-10-16 05:57:41,282 INFO L130 PetriNetUnfolder]: For 48064/48064 co-relation queries the response was YES. [2020-10-16 05:57:41,468 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127675 conditions, 31181 events. 7795/31181 cut-off events. For 48064/48064 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 416479 event pairs, 7158 based on Foata normal form. 1173/32354 useless extension candidates. Maximal degree in co-relation 69147. Up to 14854 conditions per place. [2020-10-16 05:57:41,557 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 30 selfloop transitions, 26 changer transitions 0/108 dead transitions. [2020-10-16 05:57:41,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 108 transitions, 858 flow [2020-10-16 05:57:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 05:57:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 05:57:41,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 997 transitions. [2020-10-16 05:57:41,559 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7016185784658691 [2020-10-16 05:57:41,559 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 997 transitions. [2020-10-16 05:57:41,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 997 transitions. [2020-10-16 05:57:41,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:41,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 997 transitions. [2020-10-16 05:57:41,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 05:57:41,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 05:57:41,562 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 05:57:41,563 INFO L185 Difference]: Start difference. First operand has 99 places, 101 transitions, 709 flow. Second operand 7 states and 997 transitions. [2020-10-16 05:57:41,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 108 transitions, 858 flow [2020-10-16 05:57:41,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 108 transitions, 772 flow, removed 18 selfloop flow, removed 7 redundant places. [2020-10-16 05:57:41,667 INFO L241 Difference]: Finished difference. Result has 99 places, 100 transitions, 676 flow [2020-10-16 05:57:41,667 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=676, PETRI_PLACES=99, PETRI_TRANSITIONS=100} [2020-10-16 05:57:41,667 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 27 predicate places. [2020-10-16 05:57:41,667 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 100 transitions, 676 flow [2020-10-16 05:57:41,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 05:57:41,668 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:41,668 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 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] [2020-10-16 05:57:41,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:41,875 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:41,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1039046273, now seen corresponding path program 1 times [2020-10-16 05:57:41,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:41,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401469997] [2020-10-16 05:57:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-16 05:57:41,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401469997] [2020-10-16 05:57:41,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086721243] [2020-10-16 05:57:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:42,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 05:57:42,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-16 05:57:42,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:42,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-10-16 05:57:42,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772340513] [2020-10-16 05:57:42,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 05:57:42,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:42,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 05:57:42,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-16 05:57:42,093 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:42,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 100 transitions, 676 flow. Second operand 13 states. [2020-10-16 05:57:42,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:42,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:42,094 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:45,603 INFO L129 PetriNetUnfolder]: 7544/26512 cut-off events. [2020-10-16 05:57:45,603 INFO L130 PetriNetUnfolder]: For 46723/46723 co-relation queries the response was YES. [2020-10-16 05:57:45,744 INFO L80 FinitePrefix]: Finished finitePrefix Result has 106037 conditions, 26512 events. 7544/26512 cut-off events. For 46723/46723 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 328770 event pairs, 7158 based on Foata normal form. 1099/27611 useless extension candidates. Maximal degree in co-relation 45658. Up to 9645 conditions per place. [2020-10-16 05:57:45,820 INFO L132 encePairwiseOnDemand]: 194/203 looper letters, 16 selfloop transitions, 40 changer transitions 0/108 dead transitions. [2020-10-16 05:57:45,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 832 flow [2020-10-16 05:57:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 05:57:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-16 05:57:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1278 transitions. [2020-10-16 05:57:45,822 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6995073891625616 [2020-10-16 05:57:45,822 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1278 transitions. [2020-10-16 05:57:45,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1278 transitions. [2020-10-16 05:57:45,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:45,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1278 transitions. [2020-10-16 05:57:45,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-16 05:57:45,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-16 05:57:45,826 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-16 05:57:45,826 INFO L185 Difference]: Start difference. First operand has 99 places, 100 transitions, 676 flow. Second operand 9 states and 1278 transitions. [2020-10-16 05:57:45,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 832 flow [2020-10-16 05:57:45,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 108 transitions, 770 flow, removed 6 selfloop flow, removed 6 redundant places. [2020-10-16 05:57:45,932 INFO L241 Difference]: Finished difference. Result has 103 places, 100 transitions, 731 flow [2020-10-16 05:57:45,932 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=731, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2020-10-16 05:57:45,932 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 31 predicate places. [2020-10-16 05:57:45,932 INFO L481 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 731 flow [2020-10-16 05:57:45,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 05:57:45,932 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:45,932 INFO L255 CegarLoopForPetriNet]: trace histogram [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] [2020-10-16 05:57:46,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 05:57:46,133 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash -967832978, now seen corresponding path program 1 times [2020-10-16 05:57:46,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:46,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355166355] [2020-10-16 05:57:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:57:46,164 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:57:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:57:46,190 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:57:46,238 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:57:46,238 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:57:46,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-16 05:57:46,239 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:57:46,239 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:57:46,239 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:57:46,239 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:57:46,243 WARN L124 codingBacktranslator]: Skipped backtranslation of ATE [1812] [1812] L676-->L691-5: Formula: (and (not (= ULTIMATE.start_assume_abort_if_not_~cond_In2138668868 0)) (= 0 ULTIMATE.start_main_~i~0_Out2138668868)) InVars {ULTIMATE.start_assume_abort_if_not_~cond=ULTIMATE.start_assume_abort_if_not_~cond_In2138668868} OutVars{ULTIMATE.start_assume_abort_if_not_~cond=ULTIMATE.start_assume_abort_if_not_~cond_In2138668868, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_Out2138668868} AuxVars[] AssignedVars[ULTIMATE.start_main_~i~0] because there is no mapped edge [2020-10-16 05:57:46,249 WARN L124 codingBacktranslator]: Skipped backtranslation of ATE [1798] [1798] L691-5-->L694-5: Formula: (and (not (< ULTIMATE.start_main_~i~0_In-1845671485 ULTIMATE.start_main_~n~0_In-1845671485)) (= ULTIMATE.start_main_~i~0_Out-1845671485 0)) InVars {ULTIMATE.start_main_~n~0=ULTIMATE.start_main_~n~0_In-1845671485, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_In-1845671485} OutVars{ULTIMATE.start_main_~n~0=ULTIMATE.start_main_~n~0_In-1845671485, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_Out-1845671485} AuxVars[] AssignedVars[ULTIMATE.start_main_~i~0] because there is no mapped edge [2020-10-16 05:57:46,266 WARN L124 codingBacktranslator]: Skipped backtranslation of ATE [1800] [1800] L694-5-->L698: Formula: (and (= ULTIMATE.start_main_~sum~0_Out1840764729 0) (not (< ULTIMATE.start_main_~i~0_In1840764729 ULTIMATE.start_main_~n~0_In1840764729))) InVars {ULTIMATE.start_main_~n~0=ULTIMATE.start_main_~n~0_In1840764729, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_In1840764729} OutVars{ULTIMATE.start_main_~n~0=ULTIMATE.start_main_~n~0_In1840764729, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_In1840764729, ULTIMATE.start_main_~sum~0=ULTIMATE.start_main_~sum~0_Out1840764729} AuxVars[] AssignedVars[ULTIMATE.start_main_~sum~0] because there is no mapped edge [2020-10-16 05:57:46,269 WARN L124 codingBacktranslator]: Skipped backtranslation of ATE [1799] [1799] L698-6-->L701: Formula: (and (let ((.cse0 (= ULTIMATE.start_main_~sum~0_In-126096687 9))) (or (and (not .cse0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond_Out-126096687| 0)) (and .cse0 (= |ULTIMATE.start___VERIFIER_assert_#in~cond_Out-126096687| 1)))) (not (< ULTIMATE.start_main_~i~0_In-126096687 ULTIMATE.start_main_~n~0_In-126096687))) InVars {ULTIMATE.start_main_~n~0=ULTIMATE.start_main_~n~0_In-126096687, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_In-126096687, ULTIMATE.start_main_~sum~0=ULTIMATE.start_main_~sum~0_In-126096687} OutVars{ULTIMATE.start_main_~n~0=ULTIMATE.start_main_~n~0_In-126096687, ULTIMATE.start_main_~i~0=ULTIMATE.start_main_~i~0_In-126096687, ULTIMATE.start___VERIFIER_assert_#in~cond=|ULTIMATE.start___VERIFIER_assert_#in~cond_Out-126096687|, ULTIMATE.start_main_~sum~0=ULTIMATE.start_main_~sum~0_In-126096687} AuxVars[] AssignedVars[ULTIMATE.start___VERIFIER_assert_#in~cond] because there is no mapped edge [2020-10-16 05:57:46,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 05:57:46 BasicIcfg [2020-10-16 05:57:46,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 05:57:46,330 INFO L168 Benchmark]: Toolchain (without parser) took 83642.51 ms. Allocated memory was 249.6 MB in the beginning and 3.6 GB in the end (delta: 3.4 GB). Free memory was 204.6 MB in the beginning and 1.8 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.8 GB. Max. memory is 14.2 GB. [2020-10-16 05:57:46,330 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 249.6 MB. Free memory is still 225.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 05:57:46,330 INFO L168 Benchmark]: CACSL2BoogieTranslator took 574.94 ms. Allocated memory was 249.6 MB in the beginning and 306.2 MB in the end (delta: 56.6 MB). Free memory was 204.6 MB in the beginning and 262.2 MB in the end (delta: -57.5 MB). Peak memory consumption was 33.1 MB. Max. memory is 14.2 GB. [2020-10-16 05:57:46,330 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.53 ms. Allocated memory is still 306.2 MB. Free memory was 262.2 MB in the beginning and 259.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 05:57:46,331 INFO L168 Benchmark]: Boogie Preprocessor took 30.06 ms. Allocated memory is still 306.2 MB. Free memory was 259.7 MB in the beginning and 259.0 MB in the end (delta: 629.2 kB). Peak memory consumption was 629.2 kB. Max. memory is 14.2 GB. [2020-10-16 05:57:46,331 INFO L168 Benchmark]: RCFGBuilder took 396.77 ms. Allocated memory is still 306.2 MB. Free memory was 259.0 MB in the beginning and 234.7 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 14.2 GB. [2020-10-16 05:57:46,332 INFO L168 Benchmark]: TraceAbstraction took 82587.39 ms. Allocated memory was 306.2 MB in the beginning and 3.6 GB in the end (delta: 3.3 GB). Free memory was 234.7 MB in the beginning and 1.8 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.8 GB. Max. memory is 14.2 GB. [2020-10-16 05:57:46,333 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 249.6 MB. Free memory is still 225.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 574.94 ms. Allocated memory was 249.6 MB in the beginning and 306.2 MB in the end (delta: 56.6 MB). Free memory was 204.6 MB in the beginning and 262.2 MB in the end (delta: -57.5 MB). Peak memory consumption was 33.1 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 48.53 ms. Allocated memory is still 306.2 MB. Free memory was 262.2 MB in the beginning and 259.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 30.06 ms. Allocated memory is still 306.2 MB. Free memory was 259.7 MB in the beginning and 259.0 MB in the end (delta: 629.2 kB). Peak memory consumption was 629.2 kB. Max. memory is 14.2 GB. * RCFGBuilder took 396.77 ms. Allocated memory is still 306.2 MB. Free memory was 259.0 MB in the beginning and 234.7 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 82587.39 ms. Allocated memory was 306.2 MB in the beginning and 3.6 GB in the end (delta: 3.3 GB). Free memory was 234.7 MB in the beginning and 1.8 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.8 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 212 VarBasedMoverChecksPositive, 11 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 11 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 6 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.4s, 61 PlacesBefore, 14 PlacesAfterwards, 64 TransitionsBefore, 13 TransitionsAfterwards, 300 CoEnabledTransitionPairs, 5 FixpointIterations, 24 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 56 TotalNumberOfCompositions, 320 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 553 VarBasedMoverChecksPositive, 21 VarBasedMoverChecksNegative, 2 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 117 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 69 PlacesBefore, 24 PlacesAfterwards, 71 TransitionsBefore, 22 TransitionsAfterwards, 760 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 54 TotalNumberOfCompositions, 1958 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 848 VarBasedMoverChecksPositive, 36 VarBasedMoverChecksNegative, 6 SemBasedMoverChecksPositive, 30 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 216 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.8s, 77 PlacesBefore, 30 PlacesAfterwards, 78 TransitionsBefore, 27 TransitionsAfterwards, 1260 CoEnabledTransitionPairs, 6 FixpointIterations, 22 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 57 TotalNumberOfCompositions, 3644 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1277 VarBasedMoverChecksPositive, 41 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 41 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 242 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 85 PlacesBefore, 36 PlacesAfterwards, 85 TransitionsBefore, 32 TransitionsAfterwards, 1840 CoEnabledTransitionPairs, 6 FixpointIterations, 23 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 59 TotalNumberOfCompositions, 6546 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1528 VarBasedMoverChecksPositive, 66 VarBasedMoverChecksNegative, 18 SemBasedMoverChecksPositive, 48 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 356 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.7s, 93 PlacesBefore, 42 PlacesAfterwards, 92 TransitionsBefore, 37 TransitionsAfterwards, 2500 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 59 TotalNumberOfCompositions, 8810 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 2093 VarBasedMoverChecksPositive, 87 VarBasedMoverChecksNegative, 30 SemBasedMoverChecksPositive, 57 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 512 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 101 PlacesBefore, 48 PlacesAfterwards, 99 TransitionsBefore, 42 TransitionsAfterwards, 3240 CoEnabledTransitionPairs, 5 FixpointIterations, 22 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 62 TotalNumberOfCompositions, 11418 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 3188 VarBasedMoverChecksPositive, 104 VarBasedMoverChecksNegative, 42 SemBasedMoverChecksPositive, 62 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 895 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.8s, 109 PlacesBefore, 54 PlacesAfterwards, 106 TransitionsBefore, 47 TransitionsAfterwards, 4060 CoEnabledTransitionPairs, 6 FixpointIterations, 23 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 65 TotalNumberOfCompositions, 18122 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 3348 VarBasedMoverChecksPositive, 137 VarBasedMoverChecksNegative, 56 SemBasedMoverChecksPositive, 81 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.4s, 884 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.4s, 117 PlacesBefore, 60 PlacesAfterwards, 113 TransitionsBefore, 52 TransitionsAfterwards, 4960 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 66 TotalNumberOfCompositions, 20069 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 4232 VarBasedMoverChecksPositive, 73 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 73 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 1110 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.2s, 125 PlacesBefore, 66 PlacesAfterwards, 120 TransitionsBefore, 57 TransitionsAfterwards, 5940 CoEnabledTransitionPairs, 6 FixpointIterations, 24 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 71 TotalNumberOfCompositions, 28628 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 4886 VarBasedMoverChecksPositive, 208 VarBasedMoverChecksNegative, 90 SemBasedMoverChecksPositive, 118 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.6s, 1400 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 7.0s, 133 PlacesBefore, 72 PlacesAfterwards, 127 TransitionsBefore, 62 TransitionsAfterwards, 7000 CoEnabledTransitionPairs, 6 FixpointIterations, 21 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 69 TotalNumberOfCompositions, 33303 MoverChecksTotal - 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}; [L680] 0 int x = 0; [L687] 0 pthread_t t[10]; [L688] 0 int i; [L689] 0 int n = __VERIFIER_nondet_uint(); [L691] COND TRUE 0 i < n [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={2:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={2:0}, arg={0:0}, x=0] [L691] COND TRUE 0 i < n [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={2:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={2:0}, arg={0:0}, x=0] [L691] COND TRUE 0 i < n [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={2:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={2:0}, arg={0:0}, x=0] [L691] COND TRUE 0 i < n [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={2:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={2:0}, arg={0:0}, x=0] [L691] COND TRUE 0 i < n [L692] FCALL, FORK 0 pthread_create(&t[i], 0, thr, 0) VAL [a={2:0}, arg={0:0}, x=0] [L691] 0 i++ VAL [a={2:0}, arg={0:0}, x=0] [L694] COND TRUE 0 i < n [L695] 0 t[i] VAL [a={2:0}, arg={0:0}, x=0] [L682] 2 int t = x; VAL [a={2:0}, arg={0:0}, arg={0:0}, t=0, x=0] [L683] 2 a[t] = 1 VAL [a={2:0}, arg={0:0}, arg={0:0}, t=0, x=0] [L684] 2 x = t + 1 [L695] FCALL, JOIN 2 pthread_join(t[i], ((void *)0)) VAL [a={2:0}, arg={0:0}, arg={0:0}, t=0, x=1] [L694] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=0, x=1] [L694] COND TRUE 0 i < n [L695] 0 t[i] VAL [a={2:0}, arg={0:0}, arg={0:0}, t=0, x=1] [L682] 3 int t = x; VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=1] [L683] 3 a[t] = 1 VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=1] [L684] 3 x = t + 1 [L695] FCALL, JOIN 3 pthread_join(t[i], ((void *)0)) VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=2] [L694] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=2] [L694] COND TRUE 0 i < n [L695] 0 t[i] VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=2] [L682] 4 int t = x; VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=2] [L683] 4 a[t] = 1 VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=2] [L684] 4 x = t + 1 [L695] FCALL, JOIN 4 pthread_join(t[i], ((void *)0)) VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=3] [L694] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=3] [L694] COND TRUE 0 i < n [L695] 0 t[i] VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=3] [L682] 5 int t = x; VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=3] [L683] 5 a[t] = 1 VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=3] [L684] 5 x = t + 1 [L695] FCALL, JOIN 5 pthread_join(t[i], ((void *)0)) VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=4] [L694] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=4] [L694] COND TRUE 0 i < n [L695] 0 t[i] VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=4] [L682] 1 int t = x; VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=4] [L683] 1 a[t] = 1 VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=4] [L684] 1 x = t + 1 [L695] FCALL, JOIN 1 pthread_join(t[i], ((void *)0)) VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L694] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L698] 0 i = 0 VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L698] COND TRUE 0 i < n [L699] EXPR 0 a[i] [L699] 0 sum += a[i] [L698] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L698] COND TRUE 0 i < n [L699] EXPR 0 a[i] [L699] 0 sum += a[i] [L698] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L698] COND TRUE 0 i < n [L699] EXPR 0 a[i] [L699] 0 sum += a[i] [L698] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L698] COND TRUE 0 i < n [L699] EXPR 0 a[i] [L699] 0 sum += a[i] [L698] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L698] COND TRUE 0 i < n [L699] EXPR 0 a[i] [L699] 0 sum += a[i] [L698] 0 i++ VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, x=5] [L678] COND TRUE 0 !(cond) [L678] 0 __VERIFIER_error() VAL [a={2:0}, arg={0:0}, arg={0:0}, t=1, 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: 82.0s, OverallIterations: 58, TraceHistogramMax: 11, AutomataDifference: 35.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 33.6s, HoareTripleCheckerStatistics: 236 SDtfs, 320 SDslu, 0 SDs, 0 SdLazy, 1411 SolverSat, 261 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 902 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=731occurred in iteration=11, 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: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 1876 NumberOfCodeBlocks, 1876 NumberOfCodeBlocksAsserted, 87 NumberOfCheckSat, 1529 ConstructedInterpolants, 0 QuantifiedInterpolants, 176091 SizeOfPredicates, 30 NumberOfNonLiveVariables, 3351 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 77 InterpolantComputations, 20 PerfectInterpolantSequences, 1044/1625 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...