/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread/sigma.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 16:39:17,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 16:39:17,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 16:39:17,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 16:39:17,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 16:39:17,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 16:39:17,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 16:39:17,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 16:39:17,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 16:39:17,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 16:39:17,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 16:39:17,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 16:39:17,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 16:39:17,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 16:39:17,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 16:39:17,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 16:39:17,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 16:39:17,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 16:39:17,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 16:39:17,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 16:39:17,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 16:39:17,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 16:39:17,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 16:39:17,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 16:39:17,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-11 16:39:17,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 16:39:17,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 16:39:17,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 16:39:17,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 16:39:17,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 16:39:17,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 16:39:17,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 16:39:17,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 16:39:17,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 16:39:17,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 16:39:17,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 16:39:17,332 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-11 16:39:17,376 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 16:39:17,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 16:39:17,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 16:39:17,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 16:39:17,379 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 16:39:17,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 16:39:17,380 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 16:39:17,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 16:39:17,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 16:39:17,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 16:39:17,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 16:39:17,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 16:39:17,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 16:39:17,381 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 16:39:17,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 16:39:17,382 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 16:39:17,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 16:39:17,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 16:39:17,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 16:39:17,383 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 16:39:17,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 16:39:17,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 16:39:17,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 16:39:17,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 16:39:17,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 16:39:17,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 16:39:17,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 16:39:17,385 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 16:39:17,385 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 16:39:17,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 16:39:17,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 16:39:17,713 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 16:39:17,717 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 16:39:17,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 16:39:17,719 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 16:39:17,720 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/sigma.i [2020-10-11 16:39:17,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/278ed8440/6bd886035c8b4585a1f471f38017d7e9/FLAGa53ec645c [2020-10-11 16:39:18,345 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 16:39:18,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/sigma.i [2020-10-11 16:39:18,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/278ed8440/6bd886035c8b4585a1f471f38017d7e9/FLAGa53ec645c [2020-10-11 16:39:18,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/278ed8440/6bd886035c8b4585a1f471f38017d7e9 [2020-10-11 16:39:18,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 16:39:18,639 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 16:39:18,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 16:39:18,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 16:39:18,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 16:39:18,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 04:39:18" (1/1) ... [2020-10-11 16:39:18,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262b491a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:39:18, skipping insertion in model container [2020-10-11 16:39:18,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 04:39:18" (1/1) ... [2020-10-11 16:39:18,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 16:39:18,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 16:39:19,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 16:39:19,253 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 16:39:19,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 16:39:19,486 INFO L208 MainTranslator]: Completed translation [2020-10-11 16:39:19,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:39:19 WrapperNode [2020-10-11 16:39:19,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 16:39:19,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 16:39:19,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 16:39:19,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 16:39:19,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:39:19" (1/1) ... [2020-10-11 16:39:19,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:39:19" (1/1) ... [2020-10-11 16:39:19,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 16:39:19,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 16:39:19,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 16:39:19,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 16:39:19,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:39:19" (1/1) ... [2020-10-11 16:39:19,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:39:19" (1/1) ... [2020-10-11 16:39:19,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:39:19" (1/1) ... [2020-10-11 16:39:19,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:39:19" (1/1) ... [2020-10-11 16:39:19,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:39:19" (1/1) ... [2020-10-11 16:39:19,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:39:19" (1/1) ... [2020-10-11 16:39:19,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:39:19" (1/1) ... [2020-10-11 16:39:19,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 16:39:19,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 16:39:19,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 16:39:19,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 16:39:19,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:39:19" (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 [2020-10-11 16:39:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 16:39:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-11 16:39:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 16:39:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-11 16:39:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 16:39:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-11 16:39:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-11 16:39:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2020-10-11 16:39:19,663 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2020-10-11 16:39:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 16:39:19,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 16:39:19,665 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 16:39:20,078 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 16:39:20,079 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-11 16:39:20,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 04:39:20 BoogieIcfgContainer [2020-10-11 16:39:20,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 16:39:20,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 16:39:20,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 16:39:20,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 16:39:20,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 04:39:18" (1/3) ... [2020-10-11 16:39:20,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38caa3af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 04:39:20, skipping insertion in model container [2020-10-11 16:39:20,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:39:19" (2/3) ... [2020-10-11 16:39:20,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38caa3af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 04:39:20, skipping insertion in model container [2020-10-11 16:39:20,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 04:39:20" (3/3) ... [2020-10-11 16:39:20,090 INFO L111 eAbstractionObserver]: Analyzing ICFG sigma.i [2020-10-11 16:39:20,102 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 16:39:20,111 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 16:39:20,112 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 16:39:20,137 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:20,138 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:20,138 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:20,138 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:20,139 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:20,139 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:20,143 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:20,143 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:20,143 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:20,144 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:20,170 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 16:39:20,193 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:39:20,194 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:39:20,194 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:39:20,194 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:39:20,194 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:39:20,194 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:39:20,194 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:39:20,195 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:39:20,210 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 84 transitions, 176 flow [2020-10-11 16:39:20,281 INFO L129 PetriNetUnfolder]: 13/121 cut-off events. [2020-10-11 16:39:20,281 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 16:39:20,287 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 121 events. 13/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 205 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2020-10-11 16:39:20,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 84 transitions, 176 flow [2020-10-11 16:39:20,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 77 transitions, 162 flow [2020-10-11 16:39:20,315 INFO L129 PetriNetUnfolder]: 6/68 cut-off events. [2020-10-11 16:39:20,315 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:39:20,316 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:20,317 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:20,318 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:20,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:20,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1602560685, now seen corresponding path program 1 times [2020-10-11 16:39:20,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:20,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229760789] [2020-10-11 16:39:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:20,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229760789] [2020-10-11 16:39:20,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:20,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:39:20,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863791716] [2020-10-11 16:39:20,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:39:20,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:20,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:39:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:39:20,657 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 84 [2020-10-11 16:39:20,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 162 flow. Second operand 2 states. [2020-10-11 16:39:20,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:20,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 84 [2020-10-11 16:39:20,661 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:20,710 INFO L129 PetriNetUnfolder]: 3/99 cut-off events. [2020-10-11 16:39:20,711 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 16:39:20,712 INFO L80 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 3/99 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 145 event pairs, 0 based on Foata normal form. 8/99 useless extension candidates. Maximal degree in co-relation 103. Up to 4 conditions per place. [2020-10-11 16:39:20,714 INFO L132 encePairwiseOnDemand]: 79/84 looper letters, 0 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2020-10-11 16:39:20,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 72 transitions, 152 flow [2020-10-11 16:39:20,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:39:20,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:39:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 161 transitions. [2020-10-11 16:39:20,731 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334 [2020-10-11 16:39:20,732 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 161 transitions. [2020-10-11 16:39:20,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 161 transitions. [2020-10-11 16:39:20,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:20,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 161 transitions. [2020-10-11 16:39:20,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:39:20,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:39:20,756 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:39:20,758 INFO L185 Difference]: Start difference. First operand has 73 places, 77 transitions, 162 flow. Second operand 2 states and 161 transitions. [2020-10-11 16:39:20,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 72 transitions, 152 flow [2020-10-11 16:39:20,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:20,776 INFO L241 Difference]: Finished difference. Result has 74 places, 70 transitions, 148 flow [2020-10-11 16:39:20,779 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2020-10-11 16:39:20,780 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 1 predicate places. [2020-10-11 16:39:20,780 INFO L481 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 148 flow [2020-10-11 16:39:20,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:39:20,780 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:20,780 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:20,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 16:39:20,781 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:20,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1973215986, now seen corresponding path program 1 times [2020-10-11 16:39:20,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:20,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660925713] [2020-10-11 16:39:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:20,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660925713] [2020-10-11 16:39:20,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:20,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:39:20,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062119476] [2020-10-11 16:39:20,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:39:20,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:20,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:39:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:39:21,184 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 84 [2020-10-11 16:39:21,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 148 flow. Second operand 4 states. [2020-10-11 16:39:21,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:21,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 84 [2020-10-11 16:39:21,185 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:21,212 INFO L129 PetriNetUnfolder]: 1/79 cut-off events. [2020-10-11 16:39:21,212 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 16:39:21,212 INFO L80 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 79 events. 1/79 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 37 event pairs, 0 based on Foata normal form. 2/81 useless extension candidates. Maximal degree in co-relation 95. Up to 10 conditions per place. [2020-10-11 16:39:21,213 INFO L132 encePairwiseOnDemand]: 77/84 looper letters, 7 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2020-10-11 16:39:21,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 172 flow [2020-10-11 16:39:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:39:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:39:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 278 transitions. [2020-10-11 16:39:21,217 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2020-10-11 16:39:21,217 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 278 transitions. [2020-10-11 16:39:21,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 278 transitions. [2020-10-11 16:39:21,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:21,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 278 transitions. [2020-10-11 16:39:21,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:39:21,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:39:21,221 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:39:21,221 INFO L185 Difference]: Start difference. First operand has 74 places, 70 transitions, 148 flow. Second operand 4 states and 278 transitions. [2020-10-11 16:39:21,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 172 flow [2020-10-11 16:39:21,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:21,225 INFO L241 Difference]: Finished difference. Result has 76 places, 70 transitions, 166 flow [2020-10-11 16:39:21,225 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2020-10-11 16:39:21,226 INFO L341 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2020-10-11 16:39:21,226 INFO L481 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 166 flow [2020-10-11 16:39:21,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:39:21,227 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:21,227 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:21,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 16:39:21,228 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:21,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:21,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1507845868, now seen corresponding path program 1 times [2020-10-11 16:39:21,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:21,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163002750] [2020-10-11 16:39:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:21,269 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:21,324 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:21,376 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 16:39:21,376 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 16:39:21,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 16:39:21,378 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-11 16:39:21,379 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-11 16:39:21,402 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,402 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,402 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,402 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,403 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,403 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,403 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,404 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,404 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,404 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,405 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,406 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,407 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,407 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,408 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,408 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,410 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,412 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,414 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,414 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:21,430 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 16:39:21,430 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:39:21,430 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:39:21,430 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:39:21,431 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:39:21,431 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:39:21,431 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:39:21,431 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:39:21,431 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:39:21,435 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 198 flow [2020-10-11 16:39:21,502 INFO L129 PetriNetUnfolder]: 24/209 cut-off events. [2020-10-11 16:39:21,502 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-11 16:39:21,506 INFO L80 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 209 events. 24/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 429 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 123. Up to 8 conditions per place. [2020-10-11 16:39:21,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 90 transitions, 198 flow [2020-10-11 16:39:21,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 83 transitions, 184 flow [2020-10-11 16:39:21,521 INFO L129 PetriNetUnfolder]: 6/68 cut-off events. [2020-10-11 16:39:21,521 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:39:21,522 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:21,522 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:21,522 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:21,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2088961913, now seen corresponding path program 1 times [2020-10-11 16:39:21,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:21,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912441863] [2020-10-11 16:39:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:21,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912441863] [2020-10-11 16:39:21,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:21,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:39:21,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217723088] [2020-10-11 16:39:21,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:39:21,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:21,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:39:21,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:39:21,572 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 90 [2020-10-11 16:39:21,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 184 flow. Second operand 2 states. [2020-10-11 16:39:21,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:21,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 90 [2020-10-11 16:39:21,573 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:21,597 INFO L129 PetriNetUnfolder]: 7/168 cut-off events. [2020-10-11 16:39:21,597 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-11 16:39:21,598 INFO L80 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 168 events. 7/168 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 317 event pairs, 0 based on Foata normal form. 13/168 useless extension candidates. Maximal degree in co-relation 179. Up to 8 conditions per place. [2020-10-11 16:39:21,598 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 0 selfloop transitions, 0 changer transitions 2/78 dead transitions. [2020-10-11 16:39:21,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 174 flow [2020-10-11 16:39:21,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:39:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:39:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 173 transitions. [2020-10-11 16:39:21,601 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9611111111111111 [2020-10-11 16:39:21,601 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 173 transitions. [2020-10-11 16:39:21,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 173 transitions. [2020-10-11 16:39:21,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:21,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 173 transitions. [2020-10-11 16:39:21,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:39:21,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:39:21,603 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:39:21,603 INFO L185 Difference]: Start difference. First operand has 80 places, 83 transitions, 184 flow. Second operand 2 states and 173 transitions. [2020-10-11 16:39:21,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 174 flow [2020-10-11 16:39:21,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:21,606 INFO L241 Difference]: Finished difference. Result has 81 places, 76 transitions, 170 flow [2020-10-11 16:39:21,607 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=170, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2020-10-11 16:39:21,607 INFO L341 CegarLoopForPetriNet]: 80 programPoint places, 1 predicate places. [2020-10-11 16:39:21,607 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 170 flow [2020-10-11 16:39:21,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:39:21,607 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:21,608 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:21,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 16:39:21,608 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:21,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:21,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1369771288, now seen corresponding path program 1 times [2020-10-11 16:39:21,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:21,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164426418] [2020-10-11 16:39:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:21,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164426418] [2020-10-11 16:39:21,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:21,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:39:21,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165338112] [2020-10-11 16:39:21,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:39:21,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:21,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:39:21,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:39:21,884 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 90 [2020-10-11 16:39:21,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 170 flow. Second operand 4 states. [2020-10-11 16:39:21,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:21,885 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 90 [2020-10-11 16:39:21,885 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:21,915 INFO L129 PetriNetUnfolder]: 5/156 cut-off events. [2020-10-11 16:39:21,915 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-10-11 16:39:21,916 INFO L80 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 156 events. 5/156 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 303 event pairs, 1 based on Foata normal form. 3/159 useless extension candidates. Maximal degree in co-relation 194. Up to 23 conditions per place. [2020-10-11 16:39:21,917 INFO L132 encePairwiseOnDemand]: 83/90 looper letters, 9 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2020-10-11 16:39:21,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 202 flow [2020-10-11 16:39:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:39:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:39:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 304 transitions. [2020-10-11 16:39:21,920 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2020-10-11 16:39:21,920 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 304 transitions. [2020-10-11 16:39:21,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 304 transitions. [2020-10-11 16:39:21,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:21,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 304 transitions. [2020-10-11 16:39:21,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:39:21,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:39:21,924 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:39:21,924 INFO L185 Difference]: Start difference. First operand has 81 places, 76 transitions, 170 flow. Second operand 4 states and 304 transitions. [2020-10-11 16:39:21,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 202 flow [2020-10-11 16:39:21,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 78 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:21,928 INFO L241 Difference]: Finished difference. Result has 83 places, 78 transitions, 196 flow [2020-10-11 16:39:21,928 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2020-10-11 16:39:21,928 INFO L341 CegarLoopForPetriNet]: 80 programPoint places, 3 predicate places. [2020-10-11 16:39:21,929 INFO L481 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 196 flow [2020-10-11 16:39:21,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:39:21,929 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:21,930 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:21,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-11 16:39:21,930 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:21,931 INFO L82 PathProgramCache]: Analyzing trace with hash 467898662, now seen corresponding path program 1 times [2020-10-11 16:39:21,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:21,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941508201] [2020-10-11 16:39:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:21,957 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:21,980 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:21,992 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 16:39:21,993 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 16:39:21,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-11 16:39:21,993 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-11 16:39:21,995 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-11 16:39:22,003 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,003 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,003 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,004 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,004 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,004 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,004 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,005 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,005 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,005 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,005 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,005 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,006 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,006 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,006 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,006 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,007 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,007 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,007 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,008 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,008 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,008 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,010 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,011 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,011 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,011 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,014 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,015 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,015 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,015 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:22,020 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 16:39:22,021 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:39:22,021 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:39:22,021 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:39:22,021 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:39:22,022 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:39:22,022 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:39:22,022 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:39:22,022 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:39:22,024 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 222 flow [2020-10-11 16:39:22,075 INFO L129 PetriNetUnfolder]: 46/368 cut-off events. [2020-10-11 16:39:22,075 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-11 16:39:22,076 INFO L80 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 368 events. 46/368 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1038 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 217. Up to 16 conditions per place. [2020-10-11 16:39:22,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 96 transitions, 222 flow [2020-10-11 16:39:22,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 89 transitions, 208 flow [2020-10-11 16:39:22,088 INFO L129 PetriNetUnfolder]: 5/66 cut-off events. [2020-10-11 16:39:22,088 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:39:22,089 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:22,089 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:22,089 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash 559030503, now seen corresponding path program 1 times [2020-10-11 16:39:22,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:22,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082611076] [2020-10-11 16:39:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:22,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082611076] [2020-10-11 16:39:22,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:22,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:39:22,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167503319] [2020-10-11 16:39:22,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:39:22,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:22,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:39:22,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:39:22,129 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 96 [2020-10-11 16:39:22,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 208 flow. Second operand 2 states. [2020-10-11 16:39:22,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:22,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 96 [2020-10-11 16:39:22,130 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:22,169 INFO L129 PetriNetUnfolder]: 16/290 cut-off events. [2020-10-11 16:39:22,174 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-11 16:39:22,175 INFO L80 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 290 events. 16/290 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 749 event pairs, 1 based on Foata normal form. 22/290 useless extension candidates. Maximal degree in co-relation 314. Up to 16 conditions per place. [2020-10-11 16:39:22,176 INFO L132 encePairwiseOnDemand]: 91/96 looper letters, 0 selfloop transitions, 0 changer transitions 2/84 dead transitions. [2020-10-11 16:39:22,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 84 transitions, 198 flow [2020-10-11 16:39:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:39:22,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:39:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 185 transitions. [2020-10-11 16:39:22,185 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9635416666666666 [2020-10-11 16:39:22,187 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 185 transitions. [2020-10-11 16:39:22,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 185 transitions. [2020-10-11 16:39:22,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:22,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 185 transitions. [2020-10-11 16:39:22,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:39:22,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:39:22,190 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:39:22,190 INFO L185 Difference]: Start difference. First operand has 87 places, 89 transitions, 208 flow. Second operand 2 states and 185 transitions. [2020-10-11 16:39:22,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 84 transitions, 198 flow [2020-10-11 16:39:22,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:22,196 INFO L241 Difference]: Finished difference. Result has 88 places, 82 transitions, 194 flow [2020-10-11 16:39:22,196 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=194, PETRI_PLACES=88, PETRI_TRANSITIONS=82} [2020-10-11 16:39:22,196 INFO L341 CegarLoopForPetriNet]: 87 programPoint places, 1 predicate places. [2020-10-11 16:39:22,196 INFO L481 AbstractCegarLoop]: Abstraction has has 88 places, 82 transitions, 194 flow [2020-10-11 16:39:22,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:39:22,197 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:22,197 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:22,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-11 16:39:22,197 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:22,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1278221128, now seen corresponding path program 1 times [2020-10-11 16:39:22,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:22,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272996141] [2020-10-11 16:39:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:22,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272996141] [2020-10-11 16:39:22,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:22,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:39:22,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54111768] [2020-10-11 16:39:22,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:39:22,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:22,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:39:22,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:39:22,462 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 96 [2020-10-11 16:39:22,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 82 transitions, 194 flow. Second operand 4 states. [2020-10-11 16:39:22,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:22,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 96 [2020-10-11 16:39:22,463 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:22,514 INFO L129 PetriNetUnfolder]: 15/291 cut-off events. [2020-10-11 16:39:22,514 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2020-10-11 16:39:22,515 INFO L80 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 291 events. 15/291 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 900 event pairs, 4 based on Foata normal form. 4/295 useless extension candidates. Maximal degree in co-relation 369. Up to 47 conditions per place. [2020-10-11 16:39:22,516 INFO L132 encePairwiseOnDemand]: 89/96 looper letters, 9 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2020-10-11 16:39:22,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 226 flow [2020-10-11 16:39:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:39:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:39:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 328 transitions. [2020-10-11 16:39:22,519 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8541666666666666 [2020-10-11 16:39:22,519 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 328 transitions. [2020-10-11 16:39:22,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 328 transitions. [2020-10-11 16:39:22,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:22,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 328 transitions. [2020-10-11 16:39:22,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:39:22,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:39:22,522 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:39:22,523 INFO L185 Difference]: Start difference. First operand has 88 places, 82 transitions, 194 flow. Second operand 4 states and 328 transitions. [2020-10-11 16:39:22,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 226 flow [2020-10-11 16:39:22,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 84 transitions, 226 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:22,529 INFO L241 Difference]: Finished difference. Result has 90 places, 84 transitions, 220 flow [2020-10-11 16:39:22,530 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2020-10-11 16:39:22,530 INFO L341 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2020-10-11 16:39:22,530 INFO L481 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 220 flow [2020-10-11 16:39:22,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:39:22,530 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:22,531 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:22,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-11 16:39:22,531 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:22,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1238663843, now seen corresponding path program 1 times [2020-10-11 16:39:22,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:22,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632357067] [2020-10-11 16:39:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:22,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632357067] [2020-10-11 16:39:22,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:22,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-11 16:39:22,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58972359] [2020-10-11 16:39:22,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 16:39:22,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:22,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 16:39:22,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 16:39:23,056 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 96 [2020-10-11 16:39:23,056 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 84 transitions, 220 flow. Second operand 5 states. [2020-10-11 16:39:23,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:23,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 96 [2020-10-11 16:39:23,057 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:23,133 INFO L129 PetriNetUnfolder]: 15/333 cut-off events. [2020-10-11 16:39:23,133 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2020-10-11 16:39:23,135 INFO L80 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 333 events. 15/333 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1132 event pairs, 4 based on Foata normal form. 7/340 useless extension candidates. Maximal degree in co-relation 475. Up to 55 conditions per place. [2020-10-11 16:39:23,136 INFO L132 encePairwiseOnDemand]: 86/96 looper letters, 10 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2020-10-11 16:39:23,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 86 transitions, 262 flow [2020-10-11 16:39:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 16:39:23,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 16:39:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 470 transitions. [2020-10-11 16:39:23,139 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8159722222222222 [2020-10-11 16:39:23,139 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 470 transitions. [2020-10-11 16:39:23,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 470 transitions. [2020-10-11 16:39:23,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:23,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 470 transitions. [2020-10-11 16:39:23,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 16:39:23,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 16:39:23,142 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 16:39:23,142 INFO L185 Difference]: Start difference. First operand has 90 places, 84 transitions, 220 flow. Second operand 6 states and 470 transitions. [2020-10-11 16:39:23,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 86 transitions, 262 flow [2020-10-11 16:39:23,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 86 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:39:23,146 INFO L241 Difference]: Finished difference. Result has 95 places, 86 transitions, 250 flow [2020-10-11 16:39:23,146 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=95, PETRI_TRANSITIONS=86} [2020-10-11 16:39:23,146 INFO L341 CegarLoopForPetriNet]: 87 programPoint places, 8 predicate places. [2020-10-11 16:39:23,146 INFO L481 AbstractCegarLoop]: Abstraction has has 95 places, 86 transitions, 250 flow [2020-10-11 16:39:23,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 16:39:23,147 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:23,147 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:23,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-11 16:39:23,147 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:23,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:23,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1216364399, now seen corresponding path program 1 times [2020-10-11 16:39:23,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:23,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140111327] [2020-10-11 16:39:23,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:23,171 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:23,193 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:23,206 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 16:39:23,207 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 16:39:23,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-11 16:39:23,207 WARN L371 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-11 16:39:23,208 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-11 16:39:23,215 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,215 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,215 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,215 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,216 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,216 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,216 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,216 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,216 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,217 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,217 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,217 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,217 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,217 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,217 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,217 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,218 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,218 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,218 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,218 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,218 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,218 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,219 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,219 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,219 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,219 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,219 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,220 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,223 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,224 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,224 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,224 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,225 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,225 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,226 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,226 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,227 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,227 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,227 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,228 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:23,231 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 16:39:23,232 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:39:23,232 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:39:23,232 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:39:23,232 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:39:23,232 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:39:23,232 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:39:23,232 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:39:23,232 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:39:23,234 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 248 flow [2020-10-11 16:39:23,301 INFO L129 PetriNetUnfolder]: 92/671 cut-off events. [2020-10-11 16:39:23,301 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-11 16:39:23,304 INFO L80 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 671 events. 92/671 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2623 event pairs, 6 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 388. Up to 32 conditions per place. [2020-10-11 16:39:23,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 102 transitions, 248 flow [2020-10-11 16:39:23,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 95 transitions, 234 flow [2020-10-11 16:39:23,312 INFO L129 PetriNetUnfolder]: 6/66 cut-off events. [2020-10-11 16:39:23,313 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:39:23,313 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:23,313 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:23,313 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:23,314 INFO L82 PathProgramCache]: Analyzing trace with hash 956603341, now seen corresponding path program 1 times [2020-10-11 16:39:23,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:23,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862356117] [2020-10-11 16:39:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:23,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862356117] [2020-10-11 16:39:23,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:23,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:39:23,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955910855] [2020-10-11 16:39:23,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:39:23,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:23,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:39:23,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:39:23,334 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 102 [2020-10-11 16:39:23,334 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 95 transitions, 234 flow. Second operand 2 states. [2020-10-11 16:39:23,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:23,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 102 [2020-10-11 16:39:23,334 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:23,397 INFO L129 PetriNetUnfolder]: 37/520 cut-off events. [2020-10-11 16:39:23,397 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-11 16:39:23,399 INFO L80 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 520 events. 37/520 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1940 event pairs, 6 based on Foata normal form. 39/520 useless extension candidates. Maximal degree in co-relation 570. Up to 32 conditions per place. [2020-10-11 16:39:23,401 INFO L132 encePairwiseOnDemand]: 97/102 looper letters, 0 selfloop transitions, 0 changer transitions 2/90 dead transitions. [2020-10-11 16:39:23,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 224 flow [2020-10-11 16:39:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:39:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:39:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 197 transitions. [2020-10-11 16:39:23,402 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9656862745098039 [2020-10-11 16:39:23,402 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 197 transitions. [2020-10-11 16:39:23,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 197 transitions. [2020-10-11 16:39:23,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:23,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 197 transitions. [2020-10-11 16:39:23,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:39:23,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:39:23,404 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:39:23,404 INFO L185 Difference]: Start difference. First operand has 94 places, 95 transitions, 234 flow. Second operand 2 states and 197 transitions. [2020-10-11 16:39:23,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 224 flow [2020-10-11 16:39:23,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 90 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:23,407 INFO L241 Difference]: Finished difference. Result has 95 places, 88 transitions, 220 flow [2020-10-11 16:39:23,408 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=220, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2020-10-11 16:39:23,408 INFO L341 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2020-10-11 16:39:23,408 INFO L481 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 220 flow [2020-10-11 16:39:23,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:39:23,408 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:23,409 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:23,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-11 16:39:23,409 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:23,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:23,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1675793966, now seen corresponding path program 1 times [2020-10-11 16:39:23,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:23,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459697716] [2020-10-11 16:39:23,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:23,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459697716] [2020-10-11 16:39:23,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:23,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:39:23,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028439960] [2020-10-11 16:39:23,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:39:23,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:23,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:39:23,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:39:23,681 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 102 [2020-10-11 16:39:23,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 220 flow. Second operand 4 states. [2020-10-11 16:39:23,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:23,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 102 [2020-10-11 16:39:23,682 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:23,766 INFO L129 PetriNetUnfolder]: 38/539 cut-off events. [2020-10-11 16:39:23,766 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2020-10-11 16:39:23,769 INFO L80 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 539 events. 38/539 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2275 event pairs, 12 based on Foata normal form. 5/544 useless extension candidates. Maximal degree in co-relation 692. Up to 92 conditions per place. [2020-10-11 16:39:23,773 INFO L132 encePairwiseOnDemand]: 95/102 looper letters, 9 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2020-10-11 16:39:23,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 90 transitions, 252 flow [2020-10-11 16:39:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:39:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:39:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 352 transitions. [2020-10-11 16:39:23,776 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8627450980392157 [2020-10-11 16:39:23,776 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 352 transitions. [2020-10-11 16:39:23,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 352 transitions. [2020-10-11 16:39:23,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:23,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 352 transitions. [2020-10-11 16:39:23,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:39:23,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:39:23,778 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:39:23,778 INFO L185 Difference]: Start difference. First operand has 95 places, 88 transitions, 220 flow. Second operand 4 states and 352 transitions. [2020-10-11 16:39:23,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 90 transitions, 252 flow [2020-10-11 16:39:23,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 90 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:23,782 INFO L241 Difference]: Finished difference. Result has 97 places, 90 transitions, 246 flow [2020-10-11 16:39:23,782 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=97, PETRI_TRANSITIONS=90} [2020-10-11 16:39:23,783 INFO L341 CegarLoopForPetriNet]: 94 programPoint places, 3 predicate places. [2020-10-11 16:39:23,783 INFO L481 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 246 flow [2020-10-11 16:39:23,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:39:23,783 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:23,784 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:23,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-11 16:39:23,784 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:23,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:23,784 INFO L82 PathProgramCache]: Analyzing trace with hash -678061218, now seen corresponding path program 1 times [2020-10-11 16:39:23,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:23,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789951026] [2020-10-11 16:39:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:23,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789951026] [2020-10-11 16:39:23,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:23,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-11 16:39:23,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691874924] [2020-10-11 16:39:23,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 16:39:23,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:23,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 16:39:23,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 16:39:24,254 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 102 [2020-10-11 16:39:24,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 90 transitions, 246 flow. Second operand 5 states. [2020-10-11 16:39:24,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:24,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 102 [2020-10-11 16:39:24,255 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:24,351 INFO L129 PetriNetUnfolder]: 38/629 cut-off events. [2020-10-11 16:39:24,351 INFO L130 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2020-10-11 16:39:24,353 INFO L80 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 629 events. 38/629 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2934 event pairs, 12 based on Foata normal form. 15/644 useless extension candidates. Maximal degree in co-relation 904. Up to 108 conditions per place. [2020-10-11 16:39:24,356 INFO L132 encePairwiseOnDemand]: 92/102 looper letters, 10 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2020-10-11 16:39:24,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 92 transitions, 288 flow [2020-10-11 16:39:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 16:39:24,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 16:39:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 506 transitions. [2020-10-11 16:39:24,358 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.826797385620915 [2020-10-11 16:39:24,359 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 506 transitions. [2020-10-11 16:39:24,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 506 transitions. [2020-10-11 16:39:24,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:24,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 506 transitions. [2020-10-11 16:39:24,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 16:39:24,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 16:39:24,363 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 16:39:24,363 INFO L185 Difference]: Start difference. First operand has 97 places, 90 transitions, 246 flow. Second operand 6 states and 506 transitions. [2020-10-11 16:39:24,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 92 transitions, 288 flow [2020-10-11 16:39:24,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 92 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:39:24,366 INFO L241 Difference]: Finished difference. Result has 102 places, 92 transitions, 276 flow [2020-10-11 16:39:24,367 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=276, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2020-10-11 16:39:24,367 INFO L341 CegarLoopForPetriNet]: 94 programPoint places, 8 predicate places. [2020-10-11 16:39:24,367 INFO L481 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 276 flow [2020-10-11 16:39:24,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 16:39:24,368 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:24,368 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:24,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-11 16:39:24,368 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:24,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:24,368 INFO L82 PathProgramCache]: Analyzing trace with hash -856193083, now seen corresponding path program 1 times [2020-10-11 16:39:24,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:24,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865675114] [2020-10-11 16:39:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:24,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865675114] [2020-10-11 16:39:24,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109883750] [2020-10-11 16:39:24,444 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 [2020-10-11 16:39:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:24,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-11 16:39:24,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:39:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:24,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:39:24,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-10-11 16:39:24,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31264621] [2020-10-11 16:39:24,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:39:24,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:24,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:39:24,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:39:25,429 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2020-10-11 16:39:25,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 276 flow. Second operand 9 states. [2020-10-11 16:39:25,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:25,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2020-10-11 16:39:25,430 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:25,643 INFO L129 PetriNetUnfolder]: 37/619 cut-off events. [2020-10-11 16:39:25,643 INFO L130 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2020-10-11 16:39:25,646 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 619 events. 37/619 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2989 event pairs, 12 based on Foata normal form. 1/620 useless extension candidates. Maximal degree in co-relation 997. Up to 109 conditions per place. [2020-10-11 16:39:25,649 INFO L132 encePairwiseOnDemand]: 94/102 looper letters, 13 selfloop transitions, 8 changer transitions 0/96 dead transitions. [2020-10-11 16:39:25,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 96 transitions, 328 flow [2020-10-11 16:39:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 16:39:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-11 16:39:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 595 transitions. [2020-10-11 16:39:25,652 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2020-10-11 16:39:25,653 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 595 transitions. [2020-10-11 16:39:25,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 595 transitions. [2020-10-11 16:39:25,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:25,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 595 transitions. [2020-10-11 16:39:25,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-11 16:39:25,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-11 16:39:25,657 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-11 16:39:25,657 INFO L185 Difference]: Start difference. First operand has 102 places, 92 transitions, 276 flow. Second operand 7 states and 595 transitions. [2020-10-11 16:39:25,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 96 transitions, 328 flow [2020-10-11 16:39:25,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 96 transitions, 318 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-11 16:39:25,662 INFO L241 Difference]: Finished difference. Result has 108 places, 95 transitions, 306 flow [2020-10-11 16:39:25,663 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=306, PETRI_PLACES=108, PETRI_TRANSITIONS=95} [2020-10-11 16:39:25,663 INFO L341 CegarLoopForPetriNet]: 94 programPoint places, 14 predicate places. [2020-10-11 16:39:25,663 INFO L481 AbstractCegarLoop]: Abstraction has has 108 places, 95 transitions, 306 flow [2020-10-11 16:39:25,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:39:25,664 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:25,664 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:25,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-11 16:39:25,880 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:25,880 INFO L82 PathProgramCache]: Analyzing trace with hash -416999225, now seen corresponding path program 1 times [2020-10-11 16:39:25,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:25,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250294244] [2020-10-11 16:39:25,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:25,902 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:25,922 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:25,935 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 16:39:25,936 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 16:39:25,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-11 16:39:25,936 WARN L371 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-11 16:39:25,936 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-10-11 16:39:25,944 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,944 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,945 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,945 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,945 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,945 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,945 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,946 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,946 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,946 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,946 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,946 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,946 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,947 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,947 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,947 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,947 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,947 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,947 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,948 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,948 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,948 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,948 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,948 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,948 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,948 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,949 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,949 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,949 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,949 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,950 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,950 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,950 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,950 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,951 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,951 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,952 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,952 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,953 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,953 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,953 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,953 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,954 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,955 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,955 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,955 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,956 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,956 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,956 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,957 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:25,961 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 16:39:25,961 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:39:25,961 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:39:25,962 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:39:25,962 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:39:25,962 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:39:25,962 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:39:25,962 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:39:25,962 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:39:25,964 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 276 flow [2020-10-11 16:39:26,242 INFO L129 PetriNetUnfolder]: 190/1266 cut-off events. [2020-10-11 16:39:26,243 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-11 16:39:26,246 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 1266 events. 190/1266 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6606 event pairs, 23 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 716. Up to 80 conditions per place. [2020-10-11 16:39:26,247 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 108 transitions, 276 flow [2020-10-11 16:39:26,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 101 transitions, 262 flow [2020-10-11 16:39:26,263 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2020-10-11 16:39:26,263 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:39:26,263 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:26,263 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:26,264 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:26,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:26,264 INFO L82 PathProgramCache]: Analyzing trace with hash -896243399, now seen corresponding path program 1 times [2020-10-11 16:39:26,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:26,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414905136] [2020-10-11 16:39:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:26,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414905136] [2020-10-11 16:39:26,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:26,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:39:26,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638587355] [2020-10-11 16:39:26,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:39:26,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:26,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:39:26,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:39:26,292 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 108 [2020-10-11 16:39:26,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 101 transitions, 262 flow. Second operand 2 states. [2020-10-11 16:39:26,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:26,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 108 [2020-10-11 16:39:26,293 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:26,480 INFO L129 PetriNetUnfolder]: 86/970 cut-off events. [2020-10-11 16:39:26,481 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-11 16:39:26,484 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 970 events. 86/970 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4964 event pairs, 23 based on Foata normal form. 72/970 useless extension candidates. Maximal degree in co-relation 1075. Up to 80 conditions per place. [2020-10-11 16:39:26,487 INFO L132 encePairwiseOnDemand]: 103/108 looper letters, 0 selfloop transitions, 0 changer transitions 2/96 dead transitions. [2020-10-11 16:39:26,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 96 transitions, 252 flow [2020-10-11 16:39:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:39:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:39:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 209 transitions. [2020-10-11 16:39:26,489 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9675925925925926 [2020-10-11 16:39:26,489 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 209 transitions. [2020-10-11 16:39:26,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 209 transitions. [2020-10-11 16:39:26,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:26,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 209 transitions. [2020-10-11 16:39:26,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:39:26,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:39:26,491 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:39:26,491 INFO L185 Difference]: Start difference. First operand has 101 places, 101 transitions, 262 flow. Second operand 2 states and 209 transitions. [2020-10-11 16:39:26,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 96 transitions, 252 flow [2020-10-11 16:39:26,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 96 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:26,495 INFO L241 Difference]: Finished difference. Result has 102 places, 94 transitions, 248 flow [2020-10-11 16:39:26,495 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=248, PETRI_PLACES=102, PETRI_TRANSITIONS=94} [2020-10-11 16:39:26,495 INFO L341 CegarLoopForPetriNet]: 101 programPoint places, 1 predicate places. [2020-10-11 16:39:26,495 INFO L481 AbstractCegarLoop]: Abstraction has has 102 places, 94 transitions, 248 flow [2020-10-11 16:39:26,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:39:26,496 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:26,496 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:26,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-11 16:39:26,496 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:26,497 INFO L82 PathProgramCache]: Analyzing trace with hash -177052774, now seen corresponding path program 1 times [2020-10-11 16:39:26,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:26,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343015522] [2020-10-11 16:39:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:26,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343015522] [2020-10-11 16:39:26,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:26,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:39:26,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510110508] [2020-10-11 16:39:26,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:39:26,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:26,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:39:26,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:39:26,770 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 108 [2020-10-11 16:39:26,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 94 transitions, 248 flow. Second operand 4 states. [2020-10-11 16:39:26,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:26,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 108 [2020-10-11 16:39:26,772 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:27,073 INFO L129 PetriNetUnfolder]: 90/1012 cut-off events. [2020-10-11 16:39:27,074 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2020-10-11 16:39:27,076 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1319 conditions, 1012 events. 90/1012 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5541 event pairs, 33 based on Foata normal form. 6/1018 useless extension candidates. Maximal degree in co-relation 1311. Up to 178 conditions per place. [2020-10-11 16:39:27,079 INFO L132 encePairwiseOnDemand]: 101/108 looper letters, 9 selfloop transitions, 5 changer transitions 0/96 dead transitions. [2020-10-11 16:39:27,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 96 transitions, 280 flow [2020-10-11 16:39:27,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:39:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:39:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2020-10-11 16:39:27,082 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8703703703703703 [2020-10-11 16:39:27,082 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2020-10-11 16:39:27,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2020-10-11 16:39:27,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:27,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2020-10-11 16:39:27,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:39:27,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:39:27,085 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:39:27,085 INFO L185 Difference]: Start difference. First operand has 102 places, 94 transitions, 248 flow. Second operand 4 states and 376 transitions. [2020-10-11 16:39:27,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 96 transitions, 280 flow [2020-10-11 16:39:27,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 96 transitions, 280 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:27,089 INFO L241 Difference]: Finished difference. Result has 104 places, 96 transitions, 274 flow [2020-10-11 16:39:27,089 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=274, PETRI_PLACES=104, PETRI_TRANSITIONS=96} [2020-10-11 16:39:27,089 INFO L341 CegarLoopForPetriNet]: 101 programPoint places, 3 predicate places. [2020-10-11 16:39:27,090 INFO L481 AbstractCegarLoop]: Abstraction has has 104 places, 96 transitions, 274 flow [2020-10-11 16:39:27,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:39:27,090 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:27,090 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:27,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-11 16:39:27,090 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:27,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:27,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1018191713, now seen corresponding path program 1 times [2020-10-11 16:39:27,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:27,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442573305] [2020-10-11 16:39:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:27,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442573305] [2020-10-11 16:39:27,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:27,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-11 16:39:27,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79234825] [2020-10-11 16:39:27,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 16:39:27,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:27,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 16:39:27,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 16:39:27,525 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 108 [2020-10-11 16:39:27,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 96 transitions, 274 flow. Second operand 5 states. [2020-10-11 16:39:27,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:27,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 108 [2020-10-11 16:39:27,526 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:27,835 INFO L129 PetriNetUnfolder]: 90/1198 cut-off events. [2020-10-11 16:39:27,836 INFO L130 PetriNetUnfolder]: For 206/206 co-relation queries the response was YES. [2020-10-11 16:39:27,840 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 1198 events. 90/1198 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7196 event pairs, 33 based on Foata normal form. 31/1229 useless extension candidates. Maximal degree in co-relation 1727. Up to 210 conditions per place. [2020-10-11 16:39:27,847 INFO L132 encePairwiseOnDemand]: 98/108 looper letters, 10 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2020-10-11 16:39:27,847 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 98 transitions, 316 flow [2020-10-11 16:39:27,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 16:39:27,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 16:39:27,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 542 transitions. [2020-10-11 16:39:27,849 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8364197530864198 [2020-10-11 16:39:27,850 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 542 transitions. [2020-10-11 16:39:27,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 542 transitions. [2020-10-11 16:39:27,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:27,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 542 transitions. [2020-10-11 16:39:27,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 16:39:27,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 16:39:27,853 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 16:39:27,853 INFO L185 Difference]: Start difference. First operand has 104 places, 96 transitions, 274 flow. Second operand 6 states and 542 transitions. [2020-10-11 16:39:27,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 98 transitions, 316 flow [2020-10-11 16:39:27,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 98 transitions, 310 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:39:27,857 INFO L241 Difference]: Finished difference. Result has 109 places, 98 transitions, 304 flow [2020-10-11 16:39:27,858 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=109, PETRI_TRANSITIONS=98} [2020-10-11 16:39:27,858 INFO L341 CegarLoopForPetriNet]: 101 programPoint places, 8 predicate places. [2020-10-11 16:39:27,858 INFO L481 AbstractCegarLoop]: Abstraction has has 109 places, 98 transitions, 304 flow [2020-10-11 16:39:27,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 16:39:27,858 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:27,859 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:27,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-11 16:39:27,859 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:27,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1268589324, now seen corresponding path program 1 times [2020-10-11 16:39:27,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:27,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265317514] [2020-10-11 16:39:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:27,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265317514] [2020-10-11 16:39:27,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812076403] [2020-10-11 16:39:27,942 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 [2020-10-11 16:39:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:28,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-11 16:39:28,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:39:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:28,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:39:28,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-10-11 16:39:28,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756411656] [2020-10-11 16:39:28,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:39:28,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:28,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:39:28,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:39:28,955 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 108 [2020-10-11 16:39:28,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 98 transitions, 304 flow. Second operand 9 states. [2020-10-11 16:39:28,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:28,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 108 [2020-10-11 16:39:28,957 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:29,169 INFO L129 PetriNetUnfolder]: 89/1188 cut-off events. [2020-10-11 16:39:29,169 INFO L130 PetriNetUnfolder]: For 385/385 co-relation queries the response was YES. [2020-10-11 16:39:29,174 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1936 conditions, 1188 events. 89/1188 cut-off events. For 385/385 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7275 event pairs, 33 based on Foata normal form. 1/1189 useless extension candidates. Maximal degree in co-relation 1924. Up to 213 conditions per place. [2020-10-11 16:39:29,180 INFO L132 encePairwiseOnDemand]: 100/108 looper letters, 13 selfloop transitions, 8 changer transitions 0/102 dead transitions. [2020-10-11 16:39:29,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 102 transitions, 356 flow [2020-10-11 16:39:29,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 16:39:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-11 16:39:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 637 transitions. [2020-10-11 16:39:29,183 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2020-10-11 16:39:29,183 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 637 transitions. [2020-10-11 16:39:29,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 637 transitions. [2020-10-11 16:39:29,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:29,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 637 transitions. [2020-10-11 16:39:29,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-11 16:39:29,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-11 16:39:29,193 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-11 16:39:29,193 INFO L185 Difference]: Start difference. First operand has 109 places, 98 transitions, 304 flow. Second operand 7 states and 637 transitions. [2020-10-11 16:39:29,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 102 transitions, 356 flow [2020-10-11 16:39:29,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 102 transitions, 346 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-11 16:39:29,200 INFO L241 Difference]: Finished difference. Result has 115 places, 101 transitions, 334 flow [2020-10-11 16:39:29,201 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=334, PETRI_PLACES=115, PETRI_TRANSITIONS=101} [2020-10-11 16:39:29,201 INFO L341 CegarLoopForPetriNet]: 101 programPoint places, 14 predicate places. [2020-10-11 16:39:29,201 INFO L481 AbstractCegarLoop]: Abstraction has has 115 places, 101 transitions, 334 flow [2020-10-11 16:39:29,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:39:29,202 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:29,202 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:29,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:39:29,417 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:29,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:29,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1244274380, now seen corresponding path program 1 times [2020-10-11 16:39:29,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:29,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207588135] [2020-10-11 16:39:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-11 16:39:29,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207588135] [2020-10-11 16:39:29,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168652471] [2020-10-11 16:39:29,491 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 [2020-10-11 16:39:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:29,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 16:39:29,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:39:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:29,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:39:29,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-10-11 16:39:29,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653547435] [2020-10-11 16:39:29,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:39:29,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:29,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:39:29,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:39:30,840 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 108 [2020-10-11 16:39:30,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 101 transitions, 334 flow. Second operand 11 states. [2020-10-11 16:39:30,842 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:30,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 108 [2020-10-11 16:39:30,842 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:31,114 INFO L129 PetriNetUnfolder]: 93/1145 cut-off events. [2020-10-11 16:39:31,115 INFO L130 PetriNetUnfolder]: For 337/337 co-relation queries the response was YES. [2020-10-11 16:39:31,119 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 1145 events. 93/1145 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 7324 event pairs, 52 based on Foata normal form. 13/1158 useless extension candidates. Maximal degree in co-relation 1896. Up to 221 conditions per place. [2020-10-11 16:39:31,123 INFO L132 encePairwiseOnDemand]: 97/108 looper letters, 16 selfloop transitions, 14 changer transitions 0/109 dead transitions. [2020-10-11 16:39:31,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 109 transitions, 422 flow [2020-10-11 16:39:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 16:39:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 16:39:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1063 transitions. [2020-10-11 16:39:31,127 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8202160493827161 [2020-10-11 16:39:31,128 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1063 transitions. [2020-10-11 16:39:31,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1063 transitions. [2020-10-11 16:39:31,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:31,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1063 transitions. [2020-10-11 16:39:31,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 16:39:31,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 16:39:31,134 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 16:39:31,134 INFO L185 Difference]: Start difference. First operand has 115 places, 101 transitions, 334 flow. Second operand 12 states and 1063 transitions. [2020-10-11 16:39:31,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 109 transitions, 422 flow [2020-10-11 16:39:31,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 109 transitions, 410 flow, removed 1 selfloop flow, removed 3 redundant places. [2020-10-11 16:39:31,139 INFO L241 Difference]: Finished difference. Result has 128 places, 107 transitions, 402 flow [2020-10-11 16:39:31,139 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=402, PETRI_PLACES=128, PETRI_TRANSITIONS=107} [2020-10-11 16:39:31,139 INFO L341 CegarLoopForPetriNet]: 101 programPoint places, 27 predicate places. [2020-10-11 16:39:31,140 INFO L481 AbstractCegarLoop]: Abstraction has has 128 places, 107 transitions, 402 flow [2020-10-11 16:39:31,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:39:31,140 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:31,140 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:31,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:39:31,353 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:31,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:31,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1486879698, now seen corresponding path program 1 times [2020-10-11 16:39:31,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:31,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948948880] [2020-10-11 16:39:31,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:31,383 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:31,401 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:31,418 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 16:39:31,418 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 16:39:31,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-11 16:39:31,419 WARN L371 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-11 16:39:31,419 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-10-11 16:39:31,428 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,428 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,428 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,428 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,429 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,429 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,429 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,429 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,429 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,429 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,430 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,430 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,430 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,430 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,430 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,430 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,430 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,431 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,431 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,431 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,431 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,431 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,431 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,432 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,432 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,432 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,432 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,432 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,432 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,433 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,433 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,433 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,433 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,433 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,433 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,433 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,434 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,434 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,434 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,434 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,436 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,436 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,436 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,436 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,437 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,438 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,438 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,438 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,439 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,439 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,439 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,440 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,441 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,441 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,441 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,441 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,442 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,442 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,443 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,443 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:31,448 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 16:39:31,448 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:39:31,448 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:39:31,449 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:39:31,449 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:39:31,449 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:39:31,449 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:39:31,449 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:39:31,449 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:39:31,450 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 114 places, 114 transitions, 306 flow [2020-10-11 16:39:31,761 INFO L129 PetriNetUnfolder]: 400/2453 cut-off events. [2020-10-11 16:39:31,761 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-11 16:39:31,825 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 2453 events. 400/2453 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 16319 event pairs, 72 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 1365. Up to 192 conditions per place. [2020-10-11 16:39:31,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 114 transitions, 306 flow [2020-10-11 16:39:31,834 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 107 transitions, 292 flow [2020-10-11 16:39:31,839 INFO L129 PetriNetUnfolder]: 6/68 cut-off events. [2020-10-11 16:39:31,839 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:39:31,839 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:31,839 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:31,839 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:31,840 INFO L82 PathProgramCache]: Analyzing trace with hash -704542421, now seen corresponding path program 1 times [2020-10-11 16:39:31,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:31,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588063848] [2020-10-11 16:39:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:31,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588063848] [2020-10-11 16:39:31,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:31,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:39:31,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186269133] [2020-10-11 16:39:31,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:39:31,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:31,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:39:31,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:39:31,855 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 114 [2020-10-11 16:39:31,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 292 flow. Second operand 2 states. [2020-10-11 16:39:31,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:31,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 114 [2020-10-11 16:39:31,856 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:32,073 INFO L129 PetriNetUnfolder]: 199/1868 cut-off events. [2020-10-11 16:39:32,073 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-11 16:39:32,080 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2101 conditions, 1868 events. 199/1868 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 12167 event pairs, 72 based on Foata normal form. 137/1868 useless extension candidates. Maximal degree in co-relation 2093. Up to 192 conditions per place. [2020-10-11 16:39:32,087 INFO L132 encePairwiseOnDemand]: 109/114 looper letters, 0 selfloop transitions, 0 changer transitions 2/102 dead transitions. [2020-10-11 16:39:32,087 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 102 transitions, 282 flow [2020-10-11 16:39:32,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:39:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:39:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 221 transitions. [2020-10-11 16:39:32,088 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9692982456140351 [2020-10-11 16:39:32,088 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 221 transitions. [2020-10-11 16:39:32,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 221 transitions. [2020-10-11 16:39:32,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:32,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 221 transitions. [2020-10-11 16:39:32,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:39:32,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:39:32,090 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:39:32,090 INFO L185 Difference]: Start difference. First operand has 108 places, 107 transitions, 292 flow. Second operand 2 states and 221 transitions. [2020-10-11 16:39:32,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 102 transitions, 282 flow [2020-10-11 16:39:32,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 102 transitions, 282 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:32,094 INFO L241 Difference]: Finished difference. Result has 109 places, 100 transitions, 278 flow [2020-10-11 16:39:32,094 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=278, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2020-10-11 16:39:32,094 INFO L341 CegarLoopForPetriNet]: 108 programPoint places, 1 predicate places. [2020-10-11 16:39:32,094 INFO L481 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 278 flow [2020-10-11 16:39:32,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:39:32,094 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:32,095 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:32,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-11 16:39:32,095 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:32,095 INFO L82 PathProgramCache]: Analyzing trace with hash 14648204, now seen corresponding path program 1 times [2020-10-11 16:39:32,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:32,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755127740] [2020-10-11 16:39:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:32,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755127740] [2020-10-11 16:39:32,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:32,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:39:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637658230] [2020-10-11 16:39:32,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:39:32,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:39:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:39:32,314 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 114 [2020-10-11 16:39:32,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 278 flow. Second operand 4 states. [2020-10-11 16:39:32,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:32,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 114 [2020-10-11 16:39:32,315 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:32,577 INFO L129 PetriNetUnfolder]: 207/1938 cut-off events. [2020-10-11 16:39:32,577 INFO L130 PetriNetUnfolder]: For 257/257 co-relation queries the response was YES. [2020-10-11 16:39:32,585 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2539 conditions, 1938 events. 207/1938 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 13274 event pairs, 87 based on Foata normal form. 7/1945 useless extension candidates. Maximal degree in co-relation 2530. Up to 345 conditions per place. [2020-10-11 16:39:32,592 INFO L132 encePairwiseOnDemand]: 107/114 looper letters, 9 selfloop transitions, 5 changer transitions 0/102 dead transitions. [2020-10-11 16:39:32,592 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 102 transitions, 310 flow [2020-10-11 16:39:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:39:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:39:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 400 transitions. [2020-10-11 16:39:32,595 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8771929824561403 [2020-10-11 16:39:32,595 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 400 transitions. [2020-10-11 16:39:32,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 400 transitions. [2020-10-11 16:39:32,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:32,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 400 transitions. [2020-10-11 16:39:32,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:39:32,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:39:32,598 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:39:32,598 INFO L185 Difference]: Start difference. First operand has 109 places, 100 transitions, 278 flow. Second operand 4 states and 400 transitions. [2020-10-11 16:39:32,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 102 transitions, 310 flow [2020-10-11 16:39:32,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:32,601 INFO L241 Difference]: Finished difference. Result has 111 places, 102 transitions, 304 flow [2020-10-11 16:39:32,602 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=304, PETRI_PLACES=111, PETRI_TRANSITIONS=102} [2020-10-11 16:39:32,602 INFO L341 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2020-10-11 16:39:32,602 INFO L481 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 304 flow [2020-10-11 16:39:32,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:39:32,602 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:32,602 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:32,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-11 16:39:32,603 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:32,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:32,603 INFO L82 PathProgramCache]: Analyzing trace with hash -459700448, now seen corresponding path program 1 times [2020-10-11 16:39:32,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:32,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857375468] [2020-10-11 16:39:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:32,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857375468] [2020-10-11 16:39:32,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:32,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-11 16:39:32,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506007094] [2020-10-11 16:39:32,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 16:39:32,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:32,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 16:39:32,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 16:39:32,912 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 114 [2020-10-11 16:39:32,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 102 transitions, 304 flow. Second operand 5 states. [2020-10-11 16:39:32,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:32,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 114 [2020-10-11 16:39:32,913 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:33,269 INFO L129 PetriNetUnfolder]: 207/2316 cut-off events. [2020-10-11 16:39:33,269 INFO L130 PetriNetUnfolder]: For 414/414 co-relation queries the response was YES. [2020-10-11 16:39:33,278 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3355 conditions, 2316 events. 207/2316 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 17193 event pairs, 87 based on Foata normal form. 63/2379 useless extension candidates. Maximal degree in co-relation 3344. Up to 409 conditions per place. [2020-10-11 16:39:33,288 INFO L132 encePairwiseOnDemand]: 104/114 looper letters, 10 selfloop transitions, 9 changer transitions 0/104 dead transitions. [2020-10-11 16:39:33,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 104 transitions, 346 flow [2020-10-11 16:39:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 16:39:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 16:39:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2020-10-11 16:39:33,290 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8450292397660819 [2020-10-11 16:39:33,290 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2020-10-11 16:39:33,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2020-10-11 16:39:33,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:33,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2020-10-11 16:39:33,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 16:39:33,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 16:39:33,294 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 16:39:33,294 INFO L185 Difference]: Start difference. First operand has 111 places, 102 transitions, 304 flow. Second operand 6 states and 578 transitions. [2020-10-11 16:39:33,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 104 transitions, 346 flow [2020-10-11 16:39:33,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 104 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:39:33,298 INFO L241 Difference]: Finished difference. Result has 116 places, 104 transitions, 334 flow [2020-10-11 16:39:33,298 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=116, PETRI_TRANSITIONS=104} [2020-10-11 16:39:33,298 INFO L341 CegarLoopForPetriNet]: 108 programPoint places, 8 predicate places. [2020-10-11 16:39:33,298 INFO L481 AbstractCegarLoop]: Abstraction has has 116 places, 104 transitions, 334 flow [2020-10-11 16:39:33,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 16:39:33,299 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:33,299 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:33,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-11 16:39:33,299 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:33,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2055545697, now seen corresponding path program 1 times [2020-10-11 16:39:33,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:33,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529263301] [2020-10-11 16:39:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:33,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529263301] [2020-10-11 16:39:33,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780647172] [2020-10-11 16:39:33,360 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 [2020-10-11 16:39:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:33,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-11 16:39:33,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:39:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:33,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:39:33,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-10-11 16:39:33,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355965034] [2020-10-11 16:39:33,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:39:33,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:33,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:39:33,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:39:34,399 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 114 [2020-10-11 16:39:34,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 104 transitions, 334 flow. Second operand 9 states. [2020-10-11 16:39:34,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:34,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 114 [2020-10-11 16:39:34,400 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:34,782 INFO L129 PetriNetUnfolder]: 206/2306 cut-off events. [2020-10-11 16:39:34,783 INFO L130 PetriNetUnfolder]: For 764/764 co-relation queries the response was YES. [2020-10-11 16:39:34,793 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3755 conditions, 2306 events. 206/2306 cut-off events. For 764/764 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 17236 event pairs, 87 based on Foata normal form. 1/2307 useless extension candidates. Maximal degree in co-relation 3742. Up to 414 conditions per place. [2020-10-11 16:39:34,806 INFO L132 encePairwiseOnDemand]: 106/114 looper letters, 13 selfloop transitions, 8 changer transitions 0/108 dead transitions. [2020-10-11 16:39:34,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 108 transitions, 386 flow [2020-10-11 16:39:34,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 16:39:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-11 16:39:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 679 transitions. [2020-10-11 16:39:34,809 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8508771929824561 [2020-10-11 16:39:34,809 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 679 transitions. [2020-10-11 16:39:34,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 679 transitions. [2020-10-11 16:39:34,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:34,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 679 transitions. [2020-10-11 16:39:34,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-11 16:39:34,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-11 16:39:34,814 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-11 16:39:34,814 INFO L185 Difference]: Start difference. First operand has 116 places, 104 transitions, 334 flow. Second operand 7 states and 679 transitions. [2020-10-11 16:39:34,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 108 transitions, 386 flow [2020-10-11 16:39:34,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 108 transitions, 376 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-11 16:39:34,821 INFO L241 Difference]: Finished difference. Result has 122 places, 107 transitions, 364 flow [2020-10-11 16:39:34,821 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=364, PETRI_PLACES=122, PETRI_TRANSITIONS=107} [2020-10-11 16:39:34,821 INFO L341 CegarLoopForPetriNet]: 108 programPoint places, 14 predicate places. [2020-10-11 16:39:34,821 INFO L481 AbstractCegarLoop]: Abstraction has has 122 places, 107 transitions, 364 flow [2020-10-11 16:39:34,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:39:34,821 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:34,822 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:35,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:39:35,036 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:35,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:35,036 INFO L82 PathProgramCache]: Analyzing trace with hash 626528645, now seen corresponding path program 1 times [2020-10-11 16:39:35,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:35,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946279182] [2020-10-11 16:39:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-11 16:39:35,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946279182] [2020-10-11 16:39:35,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028189489] [2020-10-11 16:39:35,120 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 [2020-10-11 16:39:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:35,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 16:39:35,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:39:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:35,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:39:35,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-10-11 16:39:35,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536262778] [2020-10-11 16:39:35,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:39:35,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:35,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:39:35,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:39:36,381 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 114 [2020-10-11 16:39:36,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 107 transitions, 364 flow. Second operand 11 states. [2020-10-11 16:39:36,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:36,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 114 [2020-10-11 16:39:36,383 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:36,824 INFO L129 PetriNetUnfolder]: 224/2321 cut-off events. [2020-10-11 16:39:36,824 INFO L130 PetriNetUnfolder]: For 673/673 co-relation queries the response was YES. [2020-10-11 16:39:36,833 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3846 conditions, 2321 events. 224/2321 cut-off events. For 673/673 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 18139 event pairs, 126 based on Foata normal form. 19/2340 useless extension candidates. Maximal degree in co-relation 3830. Up to 478 conditions per place. [2020-10-11 16:39:36,837 INFO L132 encePairwiseOnDemand]: 103/114 looper letters, 16 selfloop transitions, 14 changer transitions 0/115 dead transitions. [2020-10-11 16:39:36,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 115 transitions, 452 flow [2020-10-11 16:39:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 16:39:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 16:39:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1135 transitions. [2020-10-11 16:39:36,841 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8296783625730995 [2020-10-11 16:39:36,841 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1135 transitions. [2020-10-11 16:39:36,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1135 transitions. [2020-10-11 16:39:36,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:36,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1135 transitions. [2020-10-11 16:39:36,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 16:39:36,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 16:39:36,847 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 16:39:36,847 INFO L185 Difference]: Start difference. First operand has 122 places, 107 transitions, 364 flow. Second operand 12 states and 1135 transitions. [2020-10-11 16:39:36,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 115 transitions, 452 flow [2020-10-11 16:39:36,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 115 transitions, 440 flow, removed 1 selfloop flow, removed 3 redundant places. [2020-10-11 16:39:36,853 INFO L241 Difference]: Finished difference. Result has 135 places, 113 transitions, 432 flow [2020-10-11 16:39:36,854 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=432, PETRI_PLACES=135, PETRI_TRANSITIONS=113} [2020-10-11 16:39:36,854 INFO L341 CegarLoopForPetriNet]: 108 programPoint places, 27 predicate places. [2020-10-11 16:39:36,854 INFO L481 AbstractCegarLoop]: Abstraction has has 135 places, 113 transitions, 432 flow [2020-10-11 16:39:36,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:39:36,854 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:36,855 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:37,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-11 16:39:37,069 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:37,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1790814372, now seen corresponding path program 1 times [2020-10-11 16:39:37,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:37,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83977377] [2020-10-11 16:39:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:37,093 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:37,114 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:37,127 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 16:39:37,127 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 16:39:37,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-11 16:39:37,128 WARN L371 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-11 16:39:37,128 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-10-11 16:39:37,137 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,137 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,138 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,138 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,138 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,138 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,138 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,138 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,138 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,139 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,139 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,139 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,139 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,139 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,139 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,139 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,140 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,140 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,140 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,140 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,140 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,140 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,140 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,141 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,141 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,141 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,141 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,141 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,141 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,141 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,142 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,142 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,142 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,142 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,142 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,142 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,142 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,143 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,143 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,143 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,143 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,143 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,143 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,144 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,144 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,144 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,145 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,145 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,145 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,146 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,147 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,147 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,147 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,147 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,148 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,148 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,148 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,149 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,150 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,150 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,150 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,150 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,151 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,151 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,151 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,152 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,153 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,153 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,153 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,153 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:37,158 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 16:39:37,159 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:39:37,159 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:39:37,159 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:39:37,159 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:39:37,159 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:39:37,159 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:39:37,159 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:39:37,159 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:39:37,161 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 121 places, 120 transitions, 338 flow [2020-10-11 16:39:37,545 INFO L129 PetriNetUnfolder]: 850/4840 cut-off events. [2020-10-11 16:39:37,546 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-11 16:39:37,560 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 4840 events. 850/4840 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 39028 event pairs, 201 based on Foata normal form. 0/4054 useless extension candidates. Maximal degree in co-relation 2671. Up to 448 conditions per place. [2020-10-11 16:39:37,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 120 transitions, 338 flow [2020-10-11 16:39:37,571 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 113 transitions, 324 flow [2020-10-11 16:39:37,576 INFO L129 PetriNetUnfolder]: 6/66 cut-off events. [2020-10-11 16:39:37,576 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:39:37,576 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:37,576 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:37,576 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:37,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1531706275, now seen corresponding path program 1 times [2020-10-11 16:39:37,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:37,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887047780] [2020-10-11 16:39:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:37,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887047780] [2020-10-11 16:39:37,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:37,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:39:37,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456932294] [2020-10-11 16:39:37,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:39:37,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:37,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:39:37,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:39:37,590 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 120 [2020-10-11 16:39:37,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 113 transitions, 324 flow. Second operand 2 states. [2020-10-11 16:39:37,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:37,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 120 [2020-10-11 16:39:37,591 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:37,960 INFO L129 PetriNetUnfolder]: 456/3678 cut-off events. [2020-10-11 16:39:37,960 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-11 16:39:37,968 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4177 conditions, 3678 events. 456/3678 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 29450 event pairs, 201 based on Foata normal form. 266/3678 useless extension candidates. Maximal degree in co-relation 4168. Up to 448 conditions per place. [2020-10-11 16:39:37,976 INFO L132 encePairwiseOnDemand]: 115/120 looper letters, 0 selfloop transitions, 0 changer transitions 2/108 dead transitions. [2020-10-11 16:39:37,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 108 transitions, 314 flow [2020-10-11 16:39:37,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:39:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:39:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 233 transitions. [2020-10-11 16:39:37,978 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9708333333333333 [2020-10-11 16:39:37,978 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 233 transitions. [2020-10-11 16:39:37,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 233 transitions. [2020-10-11 16:39:37,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:37,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 233 transitions. [2020-10-11 16:39:37,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:39:37,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:39:37,980 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:39:37,980 INFO L185 Difference]: Start difference. First operand has 115 places, 113 transitions, 324 flow. Second operand 2 states and 233 transitions. [2020-10-11 16:39:37,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 108 transitions, 314 flow [2020-10-11 16:39:37,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 108 transitions, 314 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:37,983 INFO L241 Difference]: Finished difference. Result has 116 places, 106 transitions, 310 flow [2020-10-11 16:39:37,984 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=310, PETRI_PLACES=116, PETRI_TRANSITIONS=106} [2020-10-11 16:39:37,984 INFO L341 CegarLoopForPetriNet]: 115 programPoint places, 1 predicate places. [2020-10-11 16:39:37,984 INFO L481 AbstractCegarLoop]: Abstraction has has 116 places, 106 transitions, 310 flow [2020-10-11 16:39:37,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:39:37,984 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:37,984 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:37,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-11 16:39:37,985 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:37,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2044070396, now seen corresponding path program 1 times [2020-10-11 16:39:37,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:37,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922068182] [2020-10-11 16:39:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:38,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922068182] [2020-10-11 16:39:38,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:38,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:39:38,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840263265] [2020-10-11 16:39:38,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:39:38,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:38,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:39:38,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:39:38,157 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 120 [2020-10-11 16:39:38,158 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 106 transitions, 310 flow. Second operand 4 states. [2020-10-11 16:39:38,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:38,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 120 [2020-10-11 16:39:38,158 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:38,473 INFO L129 PetriNetUnfolder]: 469/3781 cut-off events. [2020-10-11 16:39:38,473 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2020-10-11 16:39:38,486 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4983 conditions, 3781 events. 469/3781 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 31177 event pairs, 222 based on Foata normal form. 8/3789 useless extension candidates. Maximal degree in co-relation 4973. Up to 673 conditions per place. [2020-10-11 16:39:38,495 INFO L132 encePairwiseOnDemand]: 113/120 looper letters, 9 selfloop transitions, 5 changer transitions 0/108 dead transitions. [2020-10-11 16:39:38,495 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 108 transitions, 342 flow [2020-10-11 16:39:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:39:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:39:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 424 transitions. [2020-10-11 16:39:38,496 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8833333333333333 [2020-10-11 16:39:38,497 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 424 transitions. [2020-10-11 16:39:38,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 424 transitions. [2020-10-11 16:39:38,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:38,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 424 transitions. [2020-10-11 16:39:38,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:39:38,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:39:38,499 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:39:38,499 INFO L185 Difference]: Start difference. First operand has 116 places, 106 transitions, 310 flow. Second operand 4 states and 424 transitions. [2020-10-11 16:39:38,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 108 transitions, 342 flow [2020-10-11 16:39:38,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 108 transitions, 342 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:38,502 INFO L241 Difference]: Finished difference. Result has 118 places, 108 transitions, 336 flow [2020-10-11 16:39:38,503 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=118, PETRI_TRANSITIONS=108} [2020-10-11 16:39:38,503 INFO L341 CegarLoopForPetriNet]: 115 programPoint places, 3 predicate places. [2020-10-11 16:39:38,503 INFO L481 AbstractCegarLoop]: Abstraction has has 118 places, 108 transitions, 336 flow [2020-10-11 16:39:38,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:39:38,503 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:38,503 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:38,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-11 16:39:38,504 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:38,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:38,504 INFO L82 PathProgramCache]: Analyzing trace with hash 793992673, now seen corresponding path program 1 times [2020-10-11 16:39:38,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:38,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682003100] [2020-10-11 16:39:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:38,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682003100] [2020-10-11 16:39:38,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:38,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-11 16:39:38,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964114297] [2020-10-11 16:39:38,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 16:39:38,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:38,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 16:39:38,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 16:39:38,852 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 120 [2020-10-11 16:39:38,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 108 transitions, 336 flow. Second operand 5 states. [2020-10-11 16:39:38,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:38,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 120 [2020-10-11 16:39:38,853 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:39,340 INFO L129 PetriNetUnfolder]: 469/4543 cut-off events. [2020-10-11 16:39:39,341 INFO L130 PetriNetUnfolder]: For 839/839 co-relation queries the response was YES. [2020-10-11 16:39:39,355 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6583 conditions, 4543 events. 469/4543 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 40413 event pairs, 222 based on Foata normal form. 127/4670 useless extension candidates. Maximal degree in co-relation 6571. Up to 801 conditions per place. [2020-10-11 16:39:39,365 INFO L132 encePairwiseOnDemand]: 110/120 looper letters, 10 selfloop transitions, 9 changer transitions 0/110 dead transitions. [2020-10-11 16:39:39,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 110 transitions, 378 flow [2020-10-11 16:39:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 16:39:39,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 16:39:39,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 614 transitions. [2020-10-11 16:39:39,367 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8527777777777777 [2020-10-11 16:39:39,367 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 614 transitions. [2020-10-11 16:39:39,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 614 transitions. [2020-10-11 16:39:39,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:39,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 614 transitions. [2020-10-11 16:39:39,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 16:39:39,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 16:39:39,370 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 16:39:39,370 INFO L185 Difference]: Start difference. First operand has 118 places, 108 transitions, 336 flow. Second operand 6 states and 614 transitions. [2020-10-11 16:39:39,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 110 transitions, 378 flow [2020-10-11 16:39:39,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 110 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:39:39,375 INFO L241 Difference]: Finished difference. Result has 123 places, 110 transitions, 366 flow [2020-10-11 16:39:39,375 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=123, PETRI_TRANSITIONS=110} [2020-10-11 16:39:39,375 INFO L341 CegarLoopForPetriNet]: 115 programPoint places, 8 predicate places. [2020-10-11 16:39:39,375 INFO L481 AbstractCegarLoop]: Abstraction has has 123 places, 110 transitions, 366 flow [2020-10-11 16:39:39,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 16:39:39,375 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:39,376 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:39,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-11 16:39:39,376 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:39,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:39,376 INFO L82 PathProgramCache]: Analyzing trace with hash 129107636, now seen corresponding path program 1 times [2020-10-11 16:39:39,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:39,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132782329] [2020-10-11 16:39:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:39,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132782329] [2020-10-11 16:39:39,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354452135] [2020-10-11 16:39:39,443 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 [2020-10-11 16:39:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:39,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-11 16:39:39,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:39:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:39,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:39:39,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-10-11 16:39:39,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882315421] [2020-10-11 16:39:39,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:39:39,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:39,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:39:39,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:39:40,405 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 120 [2020-10-11 16:39:40,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 110 transitions, 366 flow. Second operand 9 states. [2020-10-11 16:39:40,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:40,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 120 [2020-10-11 16:39:40,406 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:40,874 INFO L129 PetriNetUnfolder]: 468/4533 cut-off events. [2020-10-11 16:39:40,874 INFO L130 PetriNetUnfolder]: For 1522/1522 co-relation queries the response was YES. [2020-10-11 16:39:40,889 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7377 conditions, 4533 events. 468/4533 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 40399 event pairs, 222 based on Foata normal form. 1/4534 useless extension candidates. Maximal degree in co-relation 7363. Up to 808 conditions per place. [2020-10-11 16:39:40,900 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 13 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2020-10-11 16:39:40,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 114 transitions, 418 flow [2020-10-11 16:39:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 16:39:40,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-11 16:39:40,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 721 transitions. [2020-10-11 16:39:40,902 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8583333333333333 [2020-10-11 16:39:40,902 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 721 transitions. [2020-10-11 16:39:40,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 721 transitions. [2020-10-11 16:39:40,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:40,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 721 transitions. [2020-10-11 16:39:40,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-11 16:39:40,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-11 16:39:40,906 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-11 16:39:40,906 INFO L185 Difference]: Start difference. First operand has 123 places, 110 transitions, 366 flow. Second operand 7 states and 721 transitions. [2020-10-11 16:39:40,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 114 transitions, 418 flow [2020-10-11 16:39:40,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 114 transitions, 408 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-11 16:39:40,918 INFO L241 Difference]: Finished difference. Result has 129 places, 113 transitions, 396 flow [2020-10-11 16:39:40,918 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=396, PETRI_PLACES=129, PETRI_TRANSITIONS=113} [2020-10-11 16:39:40,918 INFO L341 CegarLoopForPetriNet]: 115 programPoint places, 14 predicate places. [2020-10-11 16:39:40,918 INFO L481 AbstractCegarLoop]: Abstraction has has 129 places, 113 transitions, 396 flow [2020-10-11 16:39:40,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:39:40,918 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:40,919 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:41,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:39:41,132 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:41,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:41,132 INFO L82 PathProgramCache]: Analyzing trace with hash -91281564, now seen corresponding path program 1 times [2020-10-11 16:39:41,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:41,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786107557] [2020-10-11 16:39:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-11 16:39:41,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786107557] [2020-10-11 16:39:41,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19138316] [2020-10-11 16:39:41,191 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 [2020-10-11 16:39:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:41,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 16:39:41,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:39:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:41,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:39:41,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-10-11 16:39:41,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166164048] [2020-10-11 16:39:41,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:39:41,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:41,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:39:41,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:39:42,343 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 120 [2020-10-11 16:39:42,344 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 113 transitions, 396 flow. Second operand 11 states. [2020-10-11 16:39:42,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:42,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 120 [2020-10-11 16:39:42,345 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:42,966 INFO L129 PetriNetUnfolder]: 509/4640 cut-off events. [2020-10-11 16:39:42,966 INFO L130 PetriNetUnfolder]: For 1334/1334 co-relation queries the response was YES. [2020-10-11 16:39:42,982 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7646 conditions, 4640 events. 509/4640 cut-off events. For 1334/1334 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 42780 event pairs, 291 based on Foata normal form. 26/4666 useless extension candidates. Maximal degree in co-relation 7629. Up to 995 conditions per place. [2020-10-11 16:39:42,993 INFO L132 encePairwiseOnDemand]: 109/120 looper letters, 16 selfloop transitions, 14 changer transitions 0/121 dead transitions. [2020-10-11 16:39:42,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 121 transitions, 484 flow [2020-10-11 16:39:42,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 16:39:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 16:39:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1207 transitions. [2020-10-11 16:39:42,999 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8381944444444445 [2020-10-11 16:39:42,999 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1207 transitions. [2020-10-11 16:39:42,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1207 transitions. [2020-10-11 16:39:42,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:43,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1207 transitions. [2020-10-11 16:39:43,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 16:39:43,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 16:39:43,004 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 16:39:43,004 INFO L185 Difference]: Start difference. First operand has 129 places, 113 transitions, 396 flow. Second operand 12 states and 1207 transitions. [2020-10-11 16:39:43,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 121 transitions, 484 flow [2020-10-11 16:39:43,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 121 transitions, 472 flow, removed 1 selfloop flow, removed 3 redundant places. [2020-10-11 16:39:43,015 INFO L241 Difference]: Finished difference. Result has 142 places, 119 transitions, 464 flow [2020-10-11 16:39:43,015 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=464, PETRI_PLACES=142, PETRI_TRANSITIONS=119} [2020-10-11 16:39:43,015 INFO L341 CegarLoopForPetriNet]: 115 programPoint places, 27 predicate places. [2020-10-11 16:39:43,015 INFO L481 AbstractCegarLoop]: Abstraction has has 142 places, 119 transitions, 464 flow [2020-10-11 16:39:43,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:39:43,016 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:43,016 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:43,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:39:43,231 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:43,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:43,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1622573556, now seen corresponding path program 1 times [2020-10-11 16:39:43,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:43,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101892183] [2020-10-11 16:39:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-11 16:39:43,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101892183] [2020-10-11 16:39:43,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310104021] [2020-10-11 16:39:43,313 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 [2020-10-11 16:39:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:43,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 16:39:43,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:39:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-11 16:39:43,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:39:43,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2020-10-11 16:39:43,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322419745] [2020-10-11 16:39:43,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:39:43,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:43,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:39:43,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:39:45,382 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 120 [2020-10-11 16:39:45,384 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 119 transitions, 464 flow. Second operand 14 states. [2020-10-11 16:39:45,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:45,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 120 [2020-10-11 16:39:45,384 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:46,230 INFO L129 PetriNetUnfolder]: 503/5430 cut-off events. [2020-10-11 16:39:46,231 INFO L130 PetriNetUnfolder]: For 2247/2247 co-relation queries the response was YES. [2020-10-11 16:39:46,256 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10230 conditions, 5430 events. 503/5430 cut-off events. For 2247/2247 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 53116 event pairs, 289 based on Foata normal form. 121/5551 useless extension candidates. Maximal degree in co-relation 10208. Up to 1032 conditions per place. [2020-10-11 16:39:46,266 INFO L132 encePairwiseOnDemand]: 105/120 looper letters, 18 selfloop transitions, 21 changer transitions 0/128 dead transitions. [2020-10-11 16:39:46,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 128 transitions, 582 flow [2020-10-11 16:39:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 16:39:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-11 16:39:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1655 transitions. [2020-10-11 16:39:46,269 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8112745098039216 [2020-10-11 16:39:46,269 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1655 transitions. [2020-10-11 16:39:46,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1655 transitions. [2020-10-11 16:39:46,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:46,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1655 transitions. [2020-10-11 16:39:46,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-11 16:39:46,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-11 16:39:46,274 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-11 16:39:46,274 INFO L185 Difference]: Start difference. First operand has 142 places, 119 transitions, 464 flow. Second operand 17 states and 1655 transitions. [2020-10-11 16:39:46,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 128 transitions, 582 flow [2020-10-11 16:39:46,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 128 transitions, 556 flow, removed 5 selfloop flow, removed 6 redundant places. [2020-10-11 16:39:46,288 INFO L241 Difference]: Finished difference. Result has 158 places, 125 transitions, 542 flow [2020-10-11 16:39:46,289 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=542, PETRI_PLACES=158, PETRI_TRANSITIONS=125} [2020-10-11 16:39:46,289 INFO L341 CegarLoopForPetriNet]: 115 programPoint places, 43 predicate places. [2020-10-11 16:39:46,289 INFO L481 AbstractCegarLoop]: Abstraction has has 158 places, 125 transitions, 542 flow [2020-10-11 16:39:46,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:39:46,289 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:46,289 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:46,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-11 16:39:46,503 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:46,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:46,504 INFO L82 PathProgramCache]: Analyzing trace with hash 782855465, now seen corresponding path program 1 times [2020-10-11 16:39:46,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:46,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234757031] [2020-10-11 16:39:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:46,531 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:39:46,562 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:39:46,577 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 16:39:46,577 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 16:39:46,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-11 16:39:46,577 WARN L371 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-11 16:39:46,578 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2020-10-11 16:39:46,589 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,590 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,590 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,590 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,590 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,590 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,590 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,591 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,591 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,591 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,591 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,591 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,591 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,592 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,592 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,592 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,592 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,592 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,592 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,592 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,592 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,593 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,593 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,593 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,593 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,593 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,593 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,594 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,594 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,594 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,594 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,594 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,594 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,594 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,595 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,595 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,595 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,595 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,595 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,595 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,595 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,596 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,596 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,596 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,596 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,596 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,596 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,596 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,597 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,597 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,597 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,597 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,599 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,600 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,600 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,600 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,601 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,601 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,602 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,602 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,603 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,603 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,603 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,604 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,605 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,605 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,605 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,605 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,606 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,606 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,606 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,606 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,607 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,608 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,608 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,608 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,609 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,609 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,609 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,609 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:39:46,617 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 16:39:46,617 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:39:46,617 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:39:46,617 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:39:46,618 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:39:46,618 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:39:46,618 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:39:46,618 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:39:46,618 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:39:46,619 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 128 places, 126 transitions, 372 flow [2020-10-11 16:39:47,742 INFO L129 PetriNetUnfolder]: 1812/9659 cut-off events. [2020-10-11 16:39:47,742 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-11 16:39:47,776 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10744 conditions, 9659 events. 1812/9659 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 92471 event pairs, 522 based on Foata normal form. 0/8103 useless extension candidates. Maximal degree in co-relation 5322. Up to 1024 conditions per place. [2020-10-11 16:39:47,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 126 transitions, 372 flow [2020-10-11 16:39:47,791 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 119 transitions, 358 flow [2020-10-11 16:39:47,794 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2020-10-11 16:39:47,794 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:39:47,794 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:47,794 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:47,794 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:47,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1517535393, now seen corresponding path program 1 times [2020-10-11 16:39:47,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:47,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834877425] [2020-10-11 16:39:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:47,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834877425] [2020-10-11 16:39:47,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:47,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:39:47,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654052810] [2020-10-11 16:39:47,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:39:47,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:47,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:39:47,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:39:47,808 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 126 [2020-10-11 16:39:47,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 119 transitions, 358 flow. Second operand 2 states. [2020-10-11 16:39:47,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:47,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 126 [2020-10-11 16:39:47,809 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:48,611 INFO L129 PetriNetUnfolder]: 1033/7344 cut-off events. [2020-10-11 16:39:48,611 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-11 16:39:48,631 INFO L80 FinitePrefix]: Finished finitePrefix Result has 8430 conditions, 7344 events. 1033/7344 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 69916 event pairs, 522 based on Foata normal form. 523/7344 useless extension candidates. Maximal degree in co-relation 8420. Up to 1024 conditions per place. [2020-10-11 16:39:48,642 INFO L132 encePairwiseOnDemand]: 121/126 looper letters, 0 selfloop transitions, 0 changer transitions 2/114 dead transitions. [2020-10-11 16:39:48,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 114 transitions, 348 flow [2020-10-11 16:39:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:39:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:39:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 245 transitions. [2020-10-11 16:39:48,643 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9722222222222222 [2020-10-11 16:39:48,643 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 245 transitions. [2020-10-11 16:39:48,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 245 transitions. [2020-10-11 16:39:48,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:48,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 245 transitions. [2020-10-11 16:39:48,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:39:48,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:39:48,644 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:39:48,644 INFO L185 Difference]: Start difference. First operand has 122 places, 119 transitions, 358 flow. Second operand 2 states and 245 transitions. [2020-10-11 16:39:48,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 114 transitions, 348 flow [2020-10-11 16:39:48,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 114 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:48,648 INFO L241 Difference]: Finished difference. Result has 123 places, 112 transitions, 344 flow [2020-10-11 16:39:48,648 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=344, PETRI_PLACES=123, PETRI_TRANSITIONS=112} [2020-10-11 16:39:48,649 INFO L341 CegarLoopForPetriNet]: 122 programPoint places, 1 predicate places. [2020-10-11 16:39:48,649 INFO L481 AbstractCegarLoop]: Abstraction has has 123 places, 112 transitions, 344 flow [2020-10-11 16:39:48,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:39:48,649 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:48,649 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:48,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-11 16:39:48,650 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:48,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:48,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2058241278, now seen corresponding path program 1 times [2020-10-11 16:39:48,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:48,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055868818] [2020-10-11 16:39:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:39:48,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055868818] [2020-10-11 16:39:48,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:48,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:39:48,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580639933] [2020-10-11 16:39:48,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:39:48,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:48,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:39:48,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:39:48,860 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 126 [2020-10-11 16:39:48,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 112 transitions, 344 flow. Second operand 4 states. [2020-10-11 16:39:48,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:48,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 126 [2020-10-11 16:39:48,861 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:49,599 INFO L129 PetriNetUnfolder]: 1052/7485 cut-off events. [2020-10-11 16:39:49,599 INFO L130 PetriNetUnfolder]: For 1164/1164 co-relation queries the response was YES. [2020-10-11 16:39:49,634 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9931 conditions, 7485 events. 1052/7485 cut-off events. For 1164/1164 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 72277 event pairs, 550 based on Foata normal form. 9/7494 useless extension candidates. Maximal degree in co-relation 9920. Up to 1322 conditions per place. [2020-10-11 16:39:49,656 INFO L132 encePairwiseOnDemand]: 119/126 looper letters, 9 selfloop transitions, 5 changer transitions 0/114 dead transitions. [2020-10-11 16:39:49,656 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 376 flow [2020-10-11 16:39:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:39:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:39:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 448 transitions. [2020-10-11 16:39:49,658 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2020-10-11 16:39:49,658 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 448 transitions. [2020-10-11 16:39:49,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 448 transitions. [2020-10-11 16:39:49,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:49,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 448 transitions. [2020-10-11 16:39:49,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:39:49,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:39:49,660 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:39:49,660 INFO L185 Difference]: Start difference. First operand has 123 places, 112 transitions, 344 flow. Second operand 4 states and 448 transitions. [2020-10-11 16:39:49,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 376 flow [2020-10-11 16:39:49,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:39:49,666 INFO L241 Difference]: Finished difference. Result has 125 places, 114 transitions, 370 flow [2020-10-11 16:39:49,666 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=370, PETRI_PLACES=125, PETRI_TRANSITIONS=114} [2020-10-11 16:39:49,667 INFO L341 CegarLoopForPetriNet]: 122 programPoint places, 3 predicate places. [2020-10-11 16:39:49,667 INFO L481 AbstractCegarLoop]: Abstraction has has 125 places, 114 transitions, 370 flow [2020-10-11 16:39:49,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:39:49,667 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:49,667 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:49,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-11 16:39:49,668 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:49,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1648552222, now seen corresponding path program 1 times [2020-10-11 16:39:49,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:49,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538753014] [2020-10-11 16:39:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:49,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538753014] [2020-10-11 16:39:49,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:39:49,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-11 16:39:49,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801389967] [2020-10-11 16:39:49,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 16:39:49,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:49,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 16:39:49,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 16:39:50,012 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 126 [2020-10-11 16:39:50,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 114 transitions, 370 flow. Second operand 5 states. [2020-10-11 16:39:50,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:50,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 126 [2020-10-11 16:39:50,013 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:51,038 INFO L129 PetriNetUnfolder]: 1052/9015 cut-off events. [2020-10-11 16:39:51,038 INFO L130 PetriNetUnfolder]: For 1722/1722 co-relation queries the response was YES. [2020-10-11 16:39:51,079 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13085 conditions, 9015 events. 1052/9015 cut-off events. For 1722/1722 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 93651 event pairs, 550 based on Foata normal form. 255/9270 useless extension candidates. Maximal degree in co-relation 13072. Up to 1578 conditions per place. [2020-10-11 16:39:51,095 INFO L132 encePairwiseOnDemand]: 116/126 looper letters, 10 selfloop transitions, 9 changer transitions 0/116 dead transitions. [2020-10-11 16:39:51,096 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 116 transitions, 412 flow [2020-10-11 16:39:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 16:39:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 16:39:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 650 transitions. [2020-10-11 16:39:51,097 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8597883597883598 [2020-10-11 16:39:51,097 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 650 transitions. [2020-10-11 16:39:51,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 650 transitions. [2020-10-11 16:39:51,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:51,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 650 transitions. [2020-10-11 16:39:51,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 16:39:51,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 16:39:51,099 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 16:39:51,099 INFO L185 Difference]: Start difference. First operand has 125 places, 114 transitions, 370 flow. Second operand 6 states and 650 transitions. [2020-10-11 16:39:51,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 116 transitions, 412 flow [2020-10-11 16:39:51,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 116 transitions, 406 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:39:51,104 INFO L241 Difference]: Finished difference. Result has 130 places, 116 transitions, 400 flow [2020-10-11 16:39:51,104 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=400, PETRI_PLACES=130, PETRI_TRANSITIONS=116} [2020-10-11 16:39:51,104 INFO L341 CegarLoopForPetriNet]: 122 programPoint places, 8 predicate places. [2020-10-11 16:39:51,104 INFO L481 AbstractCegarLoop]: Abstraction has has 130 places, 116 transitions, 400 flow [2020-10-11 16:39:51,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 16:39:51,105 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:51,105 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:51,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-11 16:39:51,105 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:51,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1827561493, now seen corresponding path program 1 times [2020-10-11 16:39:51,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:51,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062108028] [2020-10-11 16:39:51,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:51,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062108028] [2020-10-11 16:39:51,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506315544] [2020-10-11 16:39:51,154 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 [2020-10-11 16:39:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:51,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-11 16:39:51,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:39:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:51,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:39:51,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-10-11 16:39:51,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941212977] [2020-10-11 16:39:51,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:39:51,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:51,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:39:51,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:39:52,146 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 126 [2020-10-11 16:39:52,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 116 transitions, 400 flow. Second operand 9 states. [2020-10-11 16:39:52,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:52,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 126 [2020-10-11 16:39:52,148 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:53,191 INFO L129 PetriNetUnfolder]: 1051/9005 cut-off events. [2020-10-11 16:39:53,191 INFO L130 PetriNetUnfolder]: For 3060/3060 co-relation queries the response was YES. [2020-10-11 16:39:53,261 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14658 conditions, 9005 events. 1051/9005 cut-off events. For 3060/3060 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 93727 event pairs, 550 based on Foata normal form. 1/9006 useless extension candidates. Maximal degree in co-relation 14643. Up to 1587 conditions per place. [2020-10-11 16:39:53,280 INFO L132 encePairwiseOnDemand]: 118/126 looper letters, 13 selfloop transitions, 8 changer transitions 0/120 dead transitions. [2020-10-11 16:39:53,280 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 120 transitions, 452 flow [2020-10-11 16:39:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 16:39:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-11 16:39:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 763 transitions. [2020-10-11 16:39:53,281 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8650793650793651 [2020-10-11 16:39:53,282 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 763 transitions. [2020-10-11 16:39:53,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 763 transitions. [2020-10-11 16:39:53,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:53,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 763 transitions. [2020-10-11 16:39:53,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-11 16:39:53,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-11 16:39:53,284 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-11 16:39:53,285 INFO L185 Difference]: Start difference. First operand has 130 places, 116 transitions, 400 flow. Second operand 7 states and 763 transitions. [2020-10-11 16:39:53,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 120 transitions, 452 flow [2020-10-11 16:39:53,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 120 transitions, 442 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-11 16:39:53,316 INFO L241 Difference]: Finished difference. Result has 136 places, 119 transitions, 430 flow [2020-10-11 16:39:53,317 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=430, PETRI_PLACES=136, PETRI_TRANSITIONS=119} [2020-10-11 16:39:53,317 INFO L341 CegarLoopForPetriNet]: 122 programPoint places, 14 predicate places. [2020-10-11 16:39:53,317 INFO L481 AbstractCegarLoop]: Abstraction has has 136 places, 119 transitions, 430 flow [2020-10-11 16:39:53,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:39:53,317 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:53,317 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:53,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-11 16:39:53,524 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:53,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:53,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1297465919, now seen corresponding path program 1 times [2020-10-11 16:39:53,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:53,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799798597] [2020-10-11 16:39:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-11 16:39:53,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799798597] [2020-10-11 16:39:53,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013040459] [2020-10-11 16:39:53,610 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 [2020-10-11 16:39:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:53,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 16:39:53,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:39:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:39:53,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:39:53,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-10-11 16:39:53,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114273599] [2020-10-11 16:39:53,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:39:53,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:53,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:39:53,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:39:54,885 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 126 [2020-10-11 16:39:54,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 119 transitions, 430 flow. Second operand 11 states. [2020-10-11 16:39:54,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:54,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 126 [2020-10-11 16:39:54,886 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:39:56,231 INFO L129 PetriNetUnfolder]: 1126/9244 cut-off events. [2020-10-11 16:39:56,231 INFO L130 PetriNetUnfolder]: For 2659/2659 co-relation queries the response was YES. [2020-10-11 16:39:56,258 INFO L80 FinitePrefix]: Finished finitePrefix Result has 15178 conditions, 9244 events. 1126/9244 cut-off events. For 2659/2659 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 98028 event pairs, 661 based on Foata normal form. 34/9278 useless extension candidates. Maximal degree in co-relation 15160. Up to 2029 conditions per place. [2020-10-11 16:39:56,271 INFO L132 encePairwiseOnDemand]: 115/126 looper letters, 16 selfloop transitions, 14 changer transitions 0/127 dead transitions. [2020-10-11 16:39:56,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 127 transitions, 518 flow [2020-10-11 16:39:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 16:39:56,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 16:39:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1279 transitions. [2020-10-11 16:39:56,273 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8458994708994709 [2020-10-11 16:39:56,273 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1279 transitions. [2020-10-11 16:39:56,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1279 transitions. [2020-10-11 16:39:56,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:56,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1279 transitions. [2020-10-11 16:39:56,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 16:39:56,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 16:39:56,277 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 16:39:56,277 INFO L185 Difference]: Start difference. First operand has 136 places, 119 transitions, 430 flow. Second operand 12 states and 1279 transitions. [2020-10-11 16:39:56,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 127 transitions, 518 flow [2020-10-11 16:39:56,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 127 transitions, 506 flow, removed 1 selfloop flow, removed 3 redundant places. [2020-10-11 16:39:56,302 INFO L241 Difference]: Finished difference. Result has 149 places, 125 transitions, 498 flow [2020-10-11 16:39:56,302 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=498, PETRI_PLACES=149, PETRI_TRANSITIONS=125} [2020-10-11 16:39:56,302 INFO L341 CegarLoopForPetriNet]: 122 programPoint places, 27 predicate places. [2020-10-11 16:39:56,302 INFO L481 AbstractCegarLoop]: Abstraction has has 149 places, 125 transitions, 498 flow [2020-10-11 16:39:56,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:39:56,302 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:39:56,303 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:39:56,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 16:39:56,518 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:39:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:39:56,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1473242912, now seen corresponding path program 1 times [2020-10-11 16:39:56,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:39:56,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868064642] [2020-10-11 16:39:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:39:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-11 16:39:56,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868064642] [2020-10-11 16:39:56,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269271459] [2020-10-11 16:39:56,607 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 [2020-10-11 16:39:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:39:56,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 16:39:56,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:39:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-11 16:39:56,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:39:56,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2020-10-11 16:39:56,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005445493] [2020-10-11 16:39:56,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:39:56,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:39:56,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:39:56,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:39:58,909 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 126 [2020-10-11 16:39:58,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 125 transitions, 498 flow. Second operand 14 states. [2020-10-11 16:39:58,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:39:58,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 126 [2020-10-11 16:39:58,911 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:40:00,617 INFO L129 PetriNetUnfolder]: 1120/10923 cut-off events. [2020-10-11 16:40:00,617 INFO L130 PetriNetUnfolder]: For 4431/4431 co-relation queries the response was YES. [2020-10-11 16:40:00,676 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20498 conditions, 10923 events. 1120/10923 cut-off events. For 4431/4431 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 122365 event pairs, 659 based on Foata normal form. 248/11171 useless extension candidates. Maximal degree in co-relation 20475. Up to 2081 conditions per place. [2020-10-11 16:40:00,694 INFO L132 encePairwiseOnDemand]: 111/126 looper letters, 18 selfloop transitions, 21 changer transitions 0/134 dead transitions. [2020-10-11 16:40:00,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 134 transitions, 616 flow [2020-10-11 16:40:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 16:40:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-11 16:40:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1757 transitions. [2020-10-11 16:40:00,697 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8202614379084967 [2020-10-11 16:40:00,697 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1757 transitions. [2020-10-11 16:40:00,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1757 transitions. [2020-10-11 16:40:00,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:40:00,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1757 transitions. [2020-10-11 16:40:00,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-11 16:40:00,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-11 16:40:00,701 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-11 16:40:00,701 INFO L185 Difference]: Start difference. First operand has 149 places, 125 transitions, 498 flow. Second operand 17 states and 1757 transitions. [2020-10-11 16:40:00,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 134 transitions, 616 flow [2020-10-11 16:40:00,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 134 transitions, 590 flow, removed 5 selfloop flow, removed 6 redundant places. [2020-10-11 16:40:00,721 INFO L241 Difference]: Finished difference. Result has 165 places, 131 transitions, 576 flow [2020-10-11 16:40:00,722 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=576, PETRI_PLACES=165, PETRI_TRANSITIONS=131} [2020-10-11 16:40:00,722 INFO L341 CegarLoopForPetriNet]: 122 programPoint places, 43 predicate places. [2020-10-11 16:40:00,722 INFO L481 AbstractCegarLoop]: Abstraction has has 165 places, 131 transitions, 576 flow [2020-10-11 16:40:00,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:40:00,722 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:40:00,723 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:40:00,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 16:40:00,938 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:40:00,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:40:00,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1937986619, now seen corresponding path program 1 times [2020-10-11 16:40:00,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:40:00,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047270473] [2020-10-11 16:40:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:40:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:40:01,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047270473] [2020-10-11 16:40:01,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743466340] [2020-10-11 16:40:01,069 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 [2020-10-11 16:40:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:01,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:40:01,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:40:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:40:01,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:40:01,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-10-11 16:40:01,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296457566] [2020-10-11 16:40:01,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 16:40:01,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:40:01,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 16:40:01,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-10-11 16:40:05,181 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 126 [2020-10-11 16:40:05,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 131 transitions, 576 flow. Second operand 21 states. [2020-10-11 16:40:05,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:40:05,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 126 [2020-10-11 16:40:05,183 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:40:06,822 INFO L129 PetriNetUnfolder]: 1108/10846 cut-off events. [2020-10-11 16:40:06,822 INFO L130 PetriNetUnfolder]: For 7755/7755 co-relation queries the response was YES. [2020-10-11 16:40:06,873 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21747 conditions, 10846 events. 1108/10846 cut-off events. For 7755/7755 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 123231 event pairs, 658 based on Foata normal form. 1/10847 useless extension candidates. Maximal degree in co-relation 21718. Up to 1819 conditions per place. [2020-10-11 16:40:06,890 INFO L132 encePairwiseOnDemand]: 118/126 looper letters, 15 selfloop transitions, 17 changer transitions 0/135 dead transitions. [2020-10-11 16:40:06,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 135 transitions, 674 flow [2020-10-11 16:40:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 16:40:06,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-11 16:40:06,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1726 transitions. [2020-10-11 16:40:06,892 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8561507936507936 [2020-10-11 16:40:06,892 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1726 transitions. [2020-10-11 16:40:06,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1726 transitions. [2020-10-11 16:40:06,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:40:06,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1726 transitions. [2020-10-11 16:40:06,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-11 16:40:06,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-11 16:40:06,897 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-11 16:40:06,897 INFO L185 Difference]: Start difference. First operand has 165 places, 131 transitions, 576 flow. Second operand 16 states and 1726 transitions. [2020-10-11 16:40:06,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 135 transitions, 674 flow [2020-10-11 16:40:06,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 135 transitions, 630 flow, removed 8 selfloop flow, removed 10 redundant places. [2020-10-11 16:40:06,948 INFO L241 Difference]: Finished difference. Result has 173 places, 134 transitions, 606 flow [2020-10-11 16:40:06,949 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=606, PETRI_PLACES=173, PETRI_TRANSITIONS=134} [2020-10-11 16:40:06,949 INFO L341 CegarLoopForPetriNet]: 122 programPoint places, 51 predicate places. [2020-10-11 16:40:06,949 INFO L481 AbstractCegarLoop]: Abstraction has has 173 places, 134 transitions, 606 flow [2020-10-11 16:40:06,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 16:40:06,949 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:40:06,949 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:40:07,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:40:07,164 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:40:07,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:40:07,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1447917757, now seen corresponding path program 1 times [2020-10-11 16:40:07,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:40:07,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116405882] [2020-10-11 16:40:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:40:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:40:07,189 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:40:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:40:07,217 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:40:07,233 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 16:40:07,233 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 16:40:07,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-11 16:40:07,233 WARN L371 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-11 16:40:07,234 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2020-10-11 16:40:07,243 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,244 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,244 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,244 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,245 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,245 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,245 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,245 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,245 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,246 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,246 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,246 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,246 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,246 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,247 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,247 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,247 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,247 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,248 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,248 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,248 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,248 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,248 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,249 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,249 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,249 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,249 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,249 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,250 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,250 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,250 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,250 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,250 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,251 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,251 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,251 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,251 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,252 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,252 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,252 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,252 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,252 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,253 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,253 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,253 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,253 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,253 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,253 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,254 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,254 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,254 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,254 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,255 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,255 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,255 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,255 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,256 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,256 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,258 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,258 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,259 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,259 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,261 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,261 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,261 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,262 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,263 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,263 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,264 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,264 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,265 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,266 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,266 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,266 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,268 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,268 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,268 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,268 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,270 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,270 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,270 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,270 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,272 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,272 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,272 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,273 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,274 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,274 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,274 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,274 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:07,284 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 16:40:07,285 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:40:07,285 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:40:07,285 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:40:07,285 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:40:07,285 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:40:07,286 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:40:07,286 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:40:07,286 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:40:07,288 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 408 flow [2020-10-11 16:40:09,723 INFO L129 PetriNetUnfolder]: 3862/19406 cut-off events. [2020-10-11 16:40:09,724 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-11 16:40:09,807 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21783 conditions, 19406 events. 3862/19406 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 213935 event pairs, 1291 based on Foata normal form. 0/16312 useless extension candidates. Maximal degree in co-relation 10726. Up to 2304 conditions per place. [2020-10-11 16:40:09,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 132 transitions, 408 flow [2020-10-11 16:40:09,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 125 transitions, 394 flow [2020-10-11 16:40:09,841 INFO L129 PetriNetUnfolder]: 5/65 cut-off events. [2020-10-11 16:40:09,841 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:40:09,841 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:40:09,842 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:40:09,842 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:40:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:40:09,842 INFO L82 PathProgramCache]: Analyzing trace with hash -747055067, now seen corresponding path program 1 times [2020-10-11 16:40:09,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:40:09,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429655947] [2020-10-11 16:40:09,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:40:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:40:09,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429655947] [2020-10-11 16:40:09,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:40:09,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:40:09,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7808927] [2020-10-11 16:40:09,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:40:09,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:40:09,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:40:09,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:40:09,854 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 132 [2020-10-11 16:40:09,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 125 transitions, 394 flow. Second operand 2 states. [2020-10-11 16:40:09,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:40:09,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 132 [2020-10-11 16:40:09,854 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:40:11,586 INFO L129 PetriNetUnfolder]: 2314/14786 cut-off events. [2020-10-11 16:40:11,587 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-11 16:40:11,635 INFO L80 FinitePrefix]: Finished finitePrefix Result has 17164 conditions, 14786 events. 2314/14786 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 162012 event pairs, 1291 based on Foata normal form. 1036/14786 useless extension candidates. Maximal degree in co-relation 17153. Up to 2304 conditions per place. [2020-10-11 16:40:11,660 INFO L132 encePairwiseOnDemand]: 127/132 looper letters, 0 selfloop transitions, 0 changer transitions 2/120 dead transitions. [2020-10-11 16:40:11,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 120 transitions, 384 flow [2020-10-11 16:40:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:40:11,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:40:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 257 transitions. [2020-10-11 16:40:11,660 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9734848484848485 [2020-10-11 16:40:11,660 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 257 transitions. [2020-10-11 16:40:11,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 257 transitions. [2020-10-11 16:40:11,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:40:11,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 257 transitions. [2020-10-11 16:40:11,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:40:11,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:40:11,661 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:40:11,662 INFO L185 Difference]: Start difference. First operand has 129 places, 125 transitions, 394 flow. Second operand 2 states and 257 transitions. [2020-10-11 16:40:11,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 120 transitions, 384 flow [2020-10-11 16:40:11,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 120 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:40:11,665 INFO L241 Difference]: Finished difference. Result has 130 places, 118 transitions, 380 flow [2020-10-11 16:40:11,665 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=380, PETRI_PLACES=130, PETRI_TRANSITIONS=118} [2020-10-11 16:40:11,665 INFO L341 CegarLoopForPetriNet]: 129 programPoint places, 1 predicate places. [2020-10-11 16:40:11,666 INFO L481 AbstractCegarLoop]: Abstraction has has 130 places, 118 transitions, 380 flow [2020-10-11 16:40:11,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:40:11,666 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:40:11,666 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:40:11,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-11 16:40:11,666 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:40:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:40:11,666 INFO L82 PathProgramCache]: Analyzing trace with hash -27864442, now seen corresponding path program 1 times [2020-10-11 16:40:11,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:40:11,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966882190] [2020-10-11 16:40:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:40:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:40:11,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966882190] [2020-10-11 16:40:11,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:40:11,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:40:11,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982451501] [2020-10-11 16:40:11,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:40:11,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:40:11,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:40:11,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:40:11,877 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 132 [2020-10-11 16:40:11,878 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 118 transitions, 380 flow. Second operand 4 states. [2020-10-11 16:40:11,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:40:11,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 132 [2020-10-11 16:40:11,879 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:40:14,564 INFO L129 PetriNetUnfolder]: 2340/14970 cut-off events. [2020-10-11 16:40:14,565 INFO L130 PetriNetUnfolder]: For 2496/2496 co-relation queries the response was YES. [2020-10-11 16:40:14,607 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20007 conditions, 14970 events. 2340/14970 cut-off events. For 2496/2496 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 165491 event pairs, 1327 based on Foata normal form. 10/14980 useless extension candidates. Maximal degree in co-relation 19995. Up to 2612 conditions per place. [2020-10-11 16:40:14,630 INFO L132 encePairwiseOnDemand]: 125/132 looper letters, 9 selfloop transitions, 5 changer transitions 0/120 dead transitions. [2020-10-11 16:40:14,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 120 transitions, 412 flow [2020-10-11 16:40:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:40:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:40:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 472 transitions. [2020-10-11 16:40:14,631 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8939393939393939 [2020-10-11 16:40:14,631 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 472 transitions. [2020-10-11 16:40:14,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 472 transitions. [2020-10-11 16:40:14,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:40:14,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 472 transitions. [2020-10-11 16:40:14,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:40:14,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:40:14,634 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:40:14,634 INFO L185 Difference]: Start difference. First operand has 130 places, 118 transitions, 380 flow. Second operand 4 states and 472 transitions. [2020-10-11 16:40:14,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 120 transitions, 412 flow [2020-10-11 16:40:14,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 120 transitions, 412 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:40:14,638 INFO L241 Difference]: Finished difference. Result has 132 places, 120 transitions, 406 flow [2020-10-11 16:40:14,638 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=406, PETRI_PLACES=132, PETRI_TRANSITIONS=120} [2020-10-11 16:40:14,639 INFO L341 CegarLoopForPetriNet]: 129 programPoint places, 3 predicate places. [2020-10-11 16:40:14,639 INFO L481 AbstractCegarLoop]: Abstraction has has 132 places, 120 transitions, 406 flow [2020-10-11 16:40:14,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:40:14,639 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:40:14,639 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:40:14,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-11 16:40:14,639 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:40:14,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:40:14,639 INFO L82 PathProgramCache]: Analyzing trace with hash 502706979, now seen corresponding path program 1 times [2020-10-11 16:40:14,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:40:14,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554775780] [2020-10-11 16:40:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:40:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:40:14,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554775780] [2020-10-11 16:40:14,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:40:14,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-11 16:40:14,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639858907] [2020-10-11 16:40:14,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 16:40:14,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:40:14,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 16:40:14,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 16:40:15,098 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 132 [2020-10-11 16:40:15,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 120 transitions, 406 flow. Second operand 5 states. [2020-10-11 16:40:15,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:40:15,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 132 [2020-10-11 16:40:15,100 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:40:17,571 INFO L129 PetriNetUnfolder]: 2340/18036 cut-off events. [2020-10-11 16:40:17,571 INFO L130 PetriNetUnfolder]: For 3576/3576 co-relation queries the response was YES. [2020-10-11 16:40:17,919 INFO L80 FinitePrefix]: Finished finitePrefix Result has 26253 conditions, 18036 events. 2340/18036 cut-off events. For 3576/3576 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 214494 event pairs, 1327 based on Foata normal form. 511/18547 useless extension candidates. Maximal degree in co-relation 26239. Up to 3124 conditions per place. [2020-10-11 16:40:17,945 INFO L132 encePairwiseOnDemand]: 122/132 looper letters, 10 selfloop transitions, 9 changer transitions 0/122 dead transitions. [2020-10-11 16:40:17,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 122 transitions, 448 flow [2020-10-11 16:40:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 16:40:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 16:40:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 686 transitions. [2020-10-11 16:40:17,947 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8661616161616161 [2020-10-11 16:40:17,947 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 686 transitions. [2020-10-11 16:40:17,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 686 transitions. [2020-10-11 16:40:17,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:40:17,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 686 transitions. [2020-10-11 16:40:17,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 16:40:17,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 16:40:17,949 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 16:40:17,949 INFO L185 Difference]: Start difference. First operand has 132 places, 120 transitions, 406 flow. Second operand 6 states and 686 transitions. [2020-10-11 16:40:17,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 122 transitions, 448 flow [2020-10-11 16:40:17,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 122 transitions, 442 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:40:17,952 INFO L241 Difference]: Finished difference. Result has 137 places, 122 transitions, 436 flow [2020-10-11 16:40:17,953 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=436, PETRI_PLACES=137, PETRI_TRANSITIONS=122} [2020-10-11 16:40:17,953 INFO L341 CegarLoopForPetriNet]: 129 programPoint places, 8 predicate places. [2020-10-11 16:40:17,953 INFO L481 AbstractCegarLoop]: Abstraction has has 137 places, 122 transitions, 436 flow [2020-10-11 16:40:17,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 16:40:17,953 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:40:17,953 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:40:17,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-11 16:40:17,954 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:40:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:40:17,954 INFO L82 PathProgramCache]: Analyzing trace with hash 274569656, now seen corresponding path program 1 times [2020-10-11 16:40:17,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:40:17,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072784324] [2020-10-11 16:40:17,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:40:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:40:18,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072784324] [2020-10-11 16:40:18,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501603696] [2020-10-11 16:40:18,003 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 [2020-10-11 16:40:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:18,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-11 16:40:18,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:40:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:40:18,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:40:18,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-10-11 16:40:18,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249269764] [2020-10-11 16:40:18,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:40:18,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:40:18,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:40:18,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:40:18,803 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 132 [2020-10-11 16:40:18,804 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 122 transitions, 436 flow. Second operand 9 states. [2020-10-11 16:40:18,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:40:18,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 132 [2020-10-11 16:40:18,804 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:40:21,316 INFO L129 PetriNetUnfolder]: 2339/18026 cut-off events. [2020-10-11 16:40:21,316 INFO L130 PetriNetUnfolder]: For 6211/6211 co-relation queries the response was YES. [2020-10-11 16:40:21,399 INFO L80 FinitePrefix]: Finished finitePrefix Result has 29374 conditions, 18026 events. 2339/18026 cut-off events. For 6211/6211 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 214522 event pairs, 1327 based on Foata normal form. 1/18027 useless extension candidates. Maximal degree in co-relation 29358. Up to 3135 conditions per place. [2020-10-11 16:40:21,428 INFO L132 encePairwiseOnDemand]: 124/132 looper letters, 13 selfloop transitions, 8 changer transitions 0/126 dead transitions. [2020-10-11 16:40:21,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 126 transitions, 488 flow [2020-10-11 16:40:21,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 16:40:21,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-11 16:40:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 805 transitions. [2020-10-11 16:40:21,430 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8712121212121212 [2020-10-11 16:40:21,430 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 805 transitions. [2020-10-11 16:40:21,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 805 transitions. [2020-10-11 16:40:21,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:40:21,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 805 transitions. [2020-10-11 16:40:21,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-11 16:40:21,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-11 16:40:21,432 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-11 16:40:21,432 INFO L185 Difference]: Start difference. First operand has 137 places, 122 transitions, 436 flow. Second operand 7 states and 805 transitions. [2020-10-11 16:40:21,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 126 transitions, 488 flow [2020-10-11 16:40:21,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 126 transitions, 478 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-11 16:40:21,495 INFO L241 Difference]: Finished difference. Result has 143 places, 125 transitions, 466 flow [2020-10-11 16:40:21,495 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=466, PETRI_PLACES=143, PETRI_TRANSITIONS=125} [2020-10-11 16:40:21,495 INFO L341 CegarLoopForPetriNet]: 129 programPoint places, 14 predicate places. [2020-10-11 16:40:21,495 INFO L481 AbstractCegarLoop]: Abstraction has has 143 places, 125 transitions, 466 flow [2020-10-11 16:40:21,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:40:21,496 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:40:21,496 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:40:21,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-11 16:40:21,697 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:40:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:40:21,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2110275688, now seen corresponding path program 1 times [2020-10-11 16:40:21,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:40:21,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847645087] [2020-10-11 16:40:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:40:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-11 16:40:21,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847645087] [2020-10-11 16:40:21,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800554862] [2020-10-11 16:40:21,751 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 [2020-10-11 16:40:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:21,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 16:40:21,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:40:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:40:21,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:40:21,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-10-11 16:40:21,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325812832] [2020-10-11 16:40:21,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:40:21,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:40:21,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:40:21,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:40:23,087 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 132 [2020-10-11 16:40:23,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 125 transitions, 466 flow. Second operand 11 states. [2020-10-11 16:40:23,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:40:23,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 132 [2020-10-11 16:40:23,088 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:40:25,881 INFO L129 PetriNetUnfolder]: 2461/18443 cut-off events. [2020-10-11 16:40:25,881 INFO L130 PetriNetUnfolder]: For 5355/5355 co-relation queries the response was YES. [2020-10-11 16:40:25,981 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30229 conditions, 18443 events. 2461/18443 cut-off events. For 5355/5355 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 221519 event pairs, 1494 based on Foata normal form. 43/18486 useless extension candidates. Maximal degree in co-relation 30210. Up to 4093 conditions per place. [2020-10-11 16:40:26,014 INFO L132 encePairwiseOnDemand]: 121/132 looper letters, 16 selfloop transitions, 14 changer transitions 0/133 dead transitions. [2020-10-11 16:40:26,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 133 transitions, 554 flow [2020-10-11 16:40:26,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 16:40:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 16:40:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1351 transitions. [2020-10-11 16:40:26,016 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8529040404040404 [2020-10-11 16:40:26,016 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1351 transitions. [2020-10-11 16:40:26,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1351 transitions. [2020-10-11 16:40:26,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:40:26,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1351 transitions. [2020-10-11 16:40:26,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 16:40:26,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 16:40:26,018 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 16:40:26,018 INFO L185 Difference]: Start difference. First operand has 143 places, 125 transitions, 466 flow. Second operand 12 states and 1351 transitions. [2020-10-11 16:40:26,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 133 transitions, 554 flow [2020-10-11 16:40:26,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 133 transitions, 542 flow, removed 1 selfloop flow, removed 3 redundant places. [2020-10-11 16:40:26,074 INFO L241 Difference]: Finished difference. Result has 156 places, 131 transitions, 534 flow [2020-10-11 16:40:26,074 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=534, PETRI_PLACES=156, PETRI_TRANSITIONS=131} [2020-10-11 16:40:26,074 INFO L341 CegarLoopForPetriNet]: 129 programPoint places, 27 predicate places. [2020-10-11 16:40:26,074 INFO L481 AbstractCegarLoop]: Abstraction has has 156 places, 131 transitions, 534 flow [2020-10-11 16:40:26,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:40:26,074 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:40:26,075 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:40:26,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:40:26,284 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:40:26,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:40:26,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1350157708, now seen corresponding path program 1 times [2020-10-11 16:40:26,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:40:26,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052009346] [2020-10-11 16:40:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:40:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-11 16:40:26,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052009346] [2020-10-11 16:40:26,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561254580] [2020-10-11 16:40:26,371 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 [2020-10-11 16:40:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:26,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 16:40:26,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:40:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-11 16:40:26,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:40:26,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2020-10-11 16:40:26,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323625469] [2020-10-11 16:40:26,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:40:26,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:40:26,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:40:26,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:40:28,406 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 132 [2020-10-11 16:40:28,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 131 transitions, 534 flow. Second operand 14 states. [2020-10-11 16:40:28,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:40:28,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 132 [2020-10-11 16:40:28,408 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:40:31,961 INFO L129 PetriNetUnfolder]: 2455/21907 cut-off events. [2020-10-11 16:40:31,961 INFO L130 PetriNetUnfolder]: For 8778/8778 co-relation queries the response was YES. [2020-10-11 16:40:32,147 INFO L80 FinitePrefix]: Finished finitePrefix Result has 40990 conditions, 21907 events. 2455/21907 cut-off events. For 8778/8778 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 277114 event pairs, 1492 based on Foata normal form. 503/22410 useless extension candidates. Maximal degree in co-relation 40966. Up to 4162 conditions per place. [2020-10-11 16:40:32,188 INFO L132 encePairwiseOnDemand]: 117/132 looper letters, 18 selfloop transitions, 21 changer transitions 0/140 dead transitions. [2020-10-11 16:40:32,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 140 transitions, 652 flow [2020-10-11 16:40:32,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 16:40:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-11 16:40:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1859 transitions. [2020-10-11 16:40:32,190 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8284313725490197 [2020-10-11 16:40:32,191 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1859 transitions. [2020-10-11 16:40:32,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1859 transitions. [2020-10-11 16:40:32,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:40:32,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1859 transitions. [2020-10-11 16:40:32,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-11 16:40:32,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-11 16:40:32,196 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-11 16:40:32,196 INFO L185 Difference]: Start difference. First operand has 156 places, 131 transitions, 534 flow. Second operand 17 states and 1859 transitions. [2020-10-11 16:40:32,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 140 transitions, 652 flow [2020-10-11 16:40:32,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 140 transitions, 626 flow, removed 5 selfloop flow, removed 6 redundant places. [2020-10-11 16:40:32,267 INFO L241 Difference]: Finished difference. Result has 172 places, 137 transitions, 612 flow [2020-10-11 16:40:32,267 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=612, PETRI_PLACES=172, PETRI_TRANSITIONS=137} [2020-10-11 16:40:32,267 INFO L341 CegarLoopForPetriNet]: 129 programPoint places, 43 predicate places. [2020-10-11 16:40:32,267 INFO L481 AbstractCegarLoop]: Abstraction has has 172 places, 137 transitions, 612 flow [2020-10-11 16:40:32,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:40:32,267 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:40:32,267 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:40:32,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-11 16:40:32,468 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:40:32,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:40:32,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1480040259, now seen corresponding path program 1 times [2020-10-11 16:40:32,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:40:32,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911605352] [2020-10-11 16:40:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:40:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:40:32,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911605352] [2020-10-11 16:40:32,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465004691] [2020-10-11 16:40:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 16:40:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:32,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:40:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:40:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:40:32,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:40:32,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-10-11 16:40:32,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76779905] [2020-10-11 16:40:32,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 16:40:32,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:40:32,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 16:40:32,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-10-11 16:40:36,541 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 132 [2020-10-11 16:40:36,543 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 137 transitions, 612 flow. Second operand 21 states. [2020-10-11 16:40:36,543 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:40:36,543 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 132 [2020-10-11 16:40:36,544 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:40:39,843 INFO L129 PetriNetUnfolder]: 2443/21830 cut-off events. [2020-10-11 16:40:39,844 INFO L130 PetriNetUnfolder]: For 15615/15615 co-relation queries the response was YES. [2020-10-11 16:40:40,073 INFO L80 FinitePrefix]: Finished finitePrefix Result has 43719 conditions, 21830 events. 2443/21830 cut-off events. For 15615/15615 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 278250 event pairs, 1491 based on Foata normal form. 1/21831 useless extension candidates. Maximal degree in co-relation 43689. Up to 3645 conditions per place. [2020-10-11 16:40:40,121 INFO L132 encePairwiseOnDemand]: 124/132 looper letters, 15 selfloop transitions, 17 changer transitions 0/141 dead transitions. [2020-10-11 16:40:40,121 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 141 transitions, 710 flow [2020-10-11 16:40:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 16:40:40,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-11 16:40:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1822 transitions. [2020-10-11 16:40:40,123 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8626893939393939 [2020-10-11 16:40:40,123 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1822 transitions. [2020-10-11 16:40:40,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1822 transitions. [2020-10-11 16:40:40,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:40:40,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1822 transitions. [2020-10-11 16:40:40,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-11 16:40:40,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-11 16:40:40,127 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-11 16:40:40,127 INFO L185 Difference]: Start difference. First operand has 172 places, 137 transitions, 612 flow. Second operand 16 states and 1822 transitions. [2020-10-11 16:40:40,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 141 transitions, 710 flow [2020-10-11 16:40:40,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 141 transitions, 666 flow, removed 8 selfloop flow, removed 10 redundant places. [2020-10-11 16:40:40,363 INFO L241 Difference]: Finished difference. Result has 180 places, 140 transitions, 642 flow [2020-10-11 16:40:40,363 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=642, PETRI_PLACES=180, PETRI_TRANSITIONS=140} [2020-10-11 16:40:40,364 INFO L341 CegarLoopForPetriNet]: 129 programPoint places, 51 predicate places. [2020-10-11 16:40:40,364 INFO L481 AbstractCegarLoop]: Abstraction has has 180 places, 140 transitions, 642 flow [2020-10-11 16:40:40,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 16:40:40,364 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:40:40,364 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:40:40,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-11 16:40:40,565 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:40:40,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:40:40,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1513772016, now seen corresponding path program 1 times [2020-10-11 16:40:40,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:40:40,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101078248] [2020-10-11 16:40:40,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:40:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:40:40,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101078248] [2020-10-11 16:40:40,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985069637] [2020-10-11 16:40:40,709 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 [2020-10-11 16:40:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:40,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:40:40,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:40:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:40:41,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:40:41,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2020-10-11 16:40:41,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022245418] [2020-10-11 16:40:41,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 16:40:41,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:40:41,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 16:40:41,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-10-11 16:40:45,724 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 132 [2020-10-11 16:40:45,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 140 transitions, 642 flow. Second operand 25 states. [2020-10-11 16:40:45,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:40:45,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 132 [2020-10-11 16:40:45,726 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:40:49,571 INFO L129 PetriNetUnfolder]: 2423/21720 cut-off events. [2020-10-11 16:40:49,571 INFO L130 PetriNetUnfolder]: For 12096/12096 co-relation queries the response was YES. [2020-10-11 16:40:49,750 INFO L80 FinitePrefix]: Finished finitePrefix Result has 41004 conditions, 21720 events. 2423/21720 cut-off events. For 12096/12096 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 280365 event pairs, 1497 based on Foata normal form. 1/21721 useless extension candidates. Maximal degree in co-relation 40971. Up to 3626 conditions per place. [2020-10-11 16:40:49,788 INFO L132 encePairwiseOnDemand]: 124/132 looper letters, 15 selfloop transitions, 20 changer transitions 0/144 dead transitions. [2020-10-11 16:40:49,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 144 transitions, 754 flow [2020-10-11 16:40:49,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 16:40:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 16:40:49,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2161 transitions. [2020-10-11 16:40:49,790 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8616427432216905 [2020-10-11 16:40:49,790 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2161 transitions. [2020-10-11 16:40:49,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2161 transitions. [2020-10-11 16:40:49,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:40:49,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2161 transitions. [2020-10-11 16:40:49,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 16:40:49,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 16:40:49,794 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 16:40:49,795 INFO L185 Difference]: Start difference. First operand has 180 places, 140 transitions, 642 flow. Second operand 19 states and 2161 transitions. [2020-10-11 16:40:49,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 144 transitions, 754 flow [2020-10-11 16:40:49,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 144 transitions, 708 flow, removed 10 selfloop flow, removed 11 redundant places. [2020-10-11 16:40:49,995 INFO L241 Difference]: Finished difference. Result has 190 places, 143 transitions, 682 flow [2020-10-11 16:40:49,996 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=682, PETRI_PLACES=190, PETRI_TRANSITIONS=143} [2020-10-11 16:40:49,996 INFO L341 CegarLoopForPetriNet]: 129 programPoint places, 61 predicate places. [2020-10-11 16:40:49,996 INFO L481 AbstractCegarLoop]: Abstraction has has 190 places, 143 transitions, 682 flow [2020-10-11 16:40:49,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 16:40:49,996 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:40:49,996 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:40:50,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-11 16:40:50,197 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:40:50,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:40:50,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1416802912, now seen corresponding path program 1 times [2020-10-11 16:40:50,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:40:50,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213370357] [2020-10-11 16:40:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:40:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:40:50,223 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:40:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:40:50,256 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:40:50,276 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 16:40:50,276 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 16:40:50,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-11 16:40:50,276 WARN L371 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-11 16:40:50,277 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2020-10-11 16:40:50,289 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,289 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,289 WARN L313 ript$VariableManager]: TermVariabe threadThread1of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,290 WARN L313 ript$VariableManager]: TermVariabe threadThread1of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,290 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,290 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,291 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,291 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,291 WARN L313 ript$VariableManager]: TermVariabe threadThread9of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,291 WARN L313 ript$VariableManager]: TermVariabe threadThread9of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,291 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,292 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,292 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,292 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,292 WARN L313 ript$VariableManager]: TermVariabe threadThread2of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,292 WARN L313 ript$VariableManager]: TermVariabe threadThread2of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,293 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,293 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,293 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,293 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,293 WARN L313 ript$VariableManager]: TermVariabe threadThread8of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,294 WARN L313 ript$VariableManager]: TermVariabe threadThread8of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,294 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,294 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,294 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,295 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,295 WARN L313 ript$VariableManager]: TermVariabe threadThread3of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,295 WARN L313 ript$VariableManager]: TermVariabe threadThread3of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,295 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,295 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,296 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,296 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,296 WARN L313 ript$VariableManager]: TermVariabe threadThread7of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,296 WARN L313 ript$VariableManager]: TermVariabe threadThread7of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,297 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,297 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,297 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,297 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,297 WARN L313 ript$VariableManager]: TermVariabe threadThread10of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,297 WARN L313 ript$VariableManager]: TermVariabe threadThread10of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,298 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,298 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,298 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,298 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,298 WARN L313 ript$VariableManager]: TermVariabe threadThread5of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,299 WARN L313 ript$VariableManager]: TermVariabe threadThread5of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,299 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,299 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,299 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,300 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,300 WARN L313 ript$VariableManager]: TermVariabe threadThread4of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,300 WARN L313 ript$VariableManager]: TermVariabe threadThread4of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,300 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,300 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,301 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,301 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,301 WARN L313 ript$VariableManager]: TermVariabe threadThread6of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,301 WARN L313 ript$VariableManager]: TermVariabe threadThread6of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,302 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,302 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,302 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,302 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,303 WARN L313 ript$VariableManager]: TermVariabe threadThread1of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,303 WARN L313 ript$VariableManager]: TermVariabe threadThread1of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,305 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,306 WARN L313 ript$VariableManager]: TermVariabe threadThread2of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,306 WARN L313 ript$VariableManager]: TermVariabe threadThread2of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,306 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,310 WARN L313 ript$VariableManager]: TermVariabe threadThread3of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,311 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,311 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,311 WARN L313 ript$VariableManager]: TermVariabe threadThread3of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,312 WARN L313 ript$VariableManager]: TermVariabe threadThread4of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,312 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,313 WARN L313 ript$VariableManager]: TermVariabe threadThread4of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,313 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,314 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,314 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,314 WARN L313 ript$VariableManager]: TermVariabe threadThread5of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,314 WARN L313 ript$VariableManager]: TermVariabe threadThread5of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,315 WARN L313 ript$VariableManager]: TermVariabe threadThread6of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,316 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,316 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,316 WARN L313 ript$VariableManager]: TermVariabe threadThread6of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,317 WARN L313 ript$VariableManager]: TermVariabe threadThread7of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,317 WARN L313 ript$VariableManager]: TermVariabe threadThread7of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,317 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,318 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,319 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,319 WARN L313 ript$VariableManager]: TermVariabe threadThread8of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,319 WARN L313 ript$VariableManager]: TermVariabe threadThread8of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,319 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,321 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,321 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,321 WARN L313 ript$VariableManager]: TermVariabe threadThread9of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,321 WARN L313 ript$VariableManager]: TermVariabe threadThread9of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,322 WARN L313 ript$VariableManager]: TermVariabe threadThread10of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,322 WARN L313 ript$VariableManager]: TermVariabe threadThread10of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,323 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,323 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:40:50,334 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 16:40:50,335 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:40:50,335 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:40:50,335 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:40:50,335 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:40:50,336 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:40:50,336 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:40:50,336 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:40:50,336 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:40:50,338 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 142 places, 138 transitions, 446 flow [2020-10-11 16:40:55,491 INFO L129 PetriNetUnfolder]: 8216/39137 cut-off events. [2020-10-11 16:40:55,492 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-11 16:40:55,727 INFO L80 FinitePrefix]: Finished finitePrefix Result has 44343 conditions, 39137 events. 8216/39137 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 484170 event pairs, 3084 based on Foata normal form. 0/32969 useless extension candidates. Maximal degree in co-relation 21763. Up to 5120 conditions per place. [2020-10-11 16:40:55,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 138 transitions, 446 flow [2020-10-11 16:40:55,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 131 transitions, 432 flow [2020-10-11 16:40:55,800 INFO L129 PetriNetUnfolder]: 6/68 cut-off events. [2020-10-11 16:40:55,800 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:40:55,801 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:40:55,801 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:40:55,801 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:40:55,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:40:55,801 INFO L82 PathProgramCache]: Analyzing trace with hash -967097809, now seen corresponding path program 1 times [2020-10-11 16:40:55,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:40:55,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543202471] [2020-10-11 16:40:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:40:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:40:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:40:55,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543202471] [2020-10-11 16:40:55,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:40:55,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:40:55,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46766860] [2020-10-11 16:40:55,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:40:55,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:40:55,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:40:55,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:40:55,812 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 138 [2020-10-11 16:40:55,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 432 flow. Second operand 2 states. [2020-10-11 16:40:55,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:40:55,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 138 [2020-10-11 16:40:55,812 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:40:59,850 INFO L129 PetriNetUnfolder]: 5131/29908 cut-off events. [2020-10-11 16:40:59,850 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-11 16:41:00,005 INFO L80 FinitePrefix]: Finished finitePrefix Result has 35115 conditions, 29908 events. 5131/29908 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 372762 event pairs, 3084 based on Foata normal form. 2061/29908 useless extension candidates. Maximal degree in co-relation 35103. Up to 5120 conditions per place. [2020-10-11 16:41:00,059 INFO L132 encePairwiseOnDemand]: 133/138 looper letters, 0 selfloop transitions, 0 changer transitions 2/126 dead transitions. [2020-10-11 16:41:00,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 126 transitions, 422 flow [2020-10-11 16:41:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:41:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:41:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 269 transitions. [2020-10-11 16:41:00,060 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9746376811594203 [2020-10-11 16:41:00,061 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 269 transitions. [2020-10-11 16:41:00,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 269 transitions. [2020-10-11 16:41:00,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:41:00,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 269 transitions. [2020-10-11 16:41:00,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:41:00,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:41:00,062 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:41:00,062 INFO L185 Difference]: Start difference. First operand has 136 places, 131 transitions, 432 flow. Second operand 2 states and 269 transitions. [2020-10-11 16:41:00,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 126 transitions, 422 flow [2020-10-11 16:41:00,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 126 transitions, 422 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:41:00,080 INFO L241 Difference]: Finished difference. Result has 137 places, 124 transitions, 418 flow [2020-10-11 16:41:00,081 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=418, PETRI_PLACES=137, PETRI_TRANSITIONS=124} [2020-10-11 16:41:00,081 INFO L341 CegarLoopForPetriNet]: 136 programPoint places, 1 predicate places. [2020-10-11 16:41:00,081 INFO L481 AbstractCegarLoop]: Abstraction has has 137 places, 124 transitions, 418 flow [2020-10-11 16:41:00,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:41:00,081 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:41:00,081 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:41:00,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-11 16:41:00,082 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:41:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:41:00,082 INFO L82 PathProgramCache]: Analyzing trace with hash -247907184, now seen corresponding path program 1 times [2020-10-11 16:41:00,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:41:00,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90191094] [2020-10-11 16:41:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:41:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:41:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:41:00,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90191094] [2020-10-11 16:41:00,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:41:00,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:41:00,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126486882] [2020-10-11 16:41:00,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:41:00,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:41:00,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:41:00,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:41:00,308 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 138 [2020-10-11 16:41:00,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 124 transitions, 418 flow. Second operand 4 states. [2020-10-11 16:41:00,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:41:00,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 138 [2020-10-11 16:41:00,309 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:41:04,248 INFO L129 PetriNetUnfolder]: 5165/30140 cut-off events. [2020-10-11 16:41:04,249 INFO L130 PetriNetUnfolder]: For 5375/5375 co-relation queries the response was YES. [2020-10-11 16:41:05,035 INFO L80 FinitePrefix]: Finished finitePrefix Result has 40587 conditions, 30140 events. 5165/30140 cut-off events. For 5375/5375 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 375934 event pairs, 3129 based on Foata normal form. 11/30151 useless extension candidates. Maximal degree in co-relation 40574. Up to 5183 conditions per place. [2020-10-11 16:41:05,088 INFO L132 encePairwiseOnDemand]: 131/138 looper letters, 9 selfloop transitions, 5 changer transitions 0/126 dead transitions. [2020-10-11 16:41:05,088 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 126 transitions, 450 flow [2020-10-11 16:41:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:41:05,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:41:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 496 transitions. [2020-10-11 16:41:05,089 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8985507246376812 [2020-10-11 16:41:05,089 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 496 transitions. [2020-10-11 16:41:05,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 496 transitions. [2020-10-11 16:41:05,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:41:05,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 496 transitions. [2020-10-11 16:41:05,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:41:05,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:41:05,091 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:41:05,091 INFO L185 Difference]: Start difference. First operand has 137 places, 124 transitions, 418 flow. Second operand 4 states and 496 transitions. [2020-10-11 16:41:05,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 126 transitions, 450 flow [2020-10-11 16:41:05,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 126 transitions, 450 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:41:05,097 INFO L241 Difference]: Finished difference. Result has 139 places, 126 transitions, 444 flow [2020-10-11 16:41:05,097 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=444, PETRI_PLACES=139, PETRI_TRANSITIONS=126} [2020-10-11 16:41:05,097 INFO L341 CegarLoopForPetriNet]: 136 programPoint places, 3 predicate places. [2020-10-11 16:41:05,097 INFO L481 AbstractCegarLoop]: Abstraction has has 139 places, 126 transitions, 444 flow [2020-10-11 16:41:05,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:41:05,098 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:41:05,098 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:41:05,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-11 16:41:05,098 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:41:05,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:41:05,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1845476700, now seen corresponding path program 1 times [2020-10-11 16:41:05,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:41:05,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422631838] [2020-10-11 16:41:05,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:41:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:41:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:41:05,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422631838] [2020-10-11 16:41:05,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:41:05,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-11 16:41:05,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738474572] [2020-10-11 16:41:05,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 16:41:05,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:41:05,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 16:41:05,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 16:41:05,525 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 138 [2020-10-11 16:41:05,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 126 transitions, 444 flow. Second operand 5 states. [2020-10-11 16:41:05,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:41:05,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 138 [2020-10-11 16:41:05,526 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:41:11,379 INFO L129 PetriNetUnfolder]: 5165/36278 cut-off events. [2020-10-11 16:41:11,380 INFO L130 PetriNetUnfolder]: For 7490/7490 co-relation queries the response was YES. [2020-10-11 16:41:11,644 INFO L80 FinitePrefix]: Finished finitePrefix Result has 52999 conditions, 36278 events. 5165/36278 cut-off events. For 7490/7490 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 484843 event pairs, 3129 based on Foata normal form. 1023/37301 useless extension candidates. Maximal degree in co-relation 52984. Up to 6207 conditions per place. [2020-10-11 16:41:11,707 INFO L132 encePairwiseOnDemand]: 128/138 looper letters, 10 selfloop transitions, 9 changer transitions 0/128 dead transitions. [2020-10-11 16:41:11,707 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 128 transitions, 486 flow [2020-10-11 16:41:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 16:41:11,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 16:41:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 722 transitions. [2020-10-11 16:41:11,708 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8719806763285024 [2020-10-11 16:41:11,708 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 722 transitions. [2020-10-11 16:41:11,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 722 transitions. [2020-10-11 16:41:11,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:41:11,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 722 transitions. [2020-10-11 16:41:11,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 16:41:11,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 16:41:11,710 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 16:41:11,710 INFO L185 Difference]: Start difference. First operand has 139 places, 126 transitions, 444 flow. Second operand 6 states and 722 transitions. [2020-10-11 16:41:11,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 128 transitions, 486 flow [2020-10-11 16:41:11,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 128 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:41:11,717 INFO L241 Difference]: Finished difference. Result has 144 places, 128 transitions, 474 flow [2020-10-11 16:41:11,718 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=474, PETRI_PLACES=144, PETRI_TRANSITIONS=128} [2020-10-11 16:41:11,718 INFO L341 CegarLoopForPetriNet]: 136 programPoint places, 8 predicate places. [2020-10-11 16:41:11,718 INFO L481 AbstractCegarLoop]: Abstraction has has 144 places, 128 transitions, 474 flow [2020-10-11 16:41:11,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 16:41:11,718 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:41:11,718 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:41:11,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-11 16:41:11,718 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:41:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:41:11,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1211038689, now seen corresponding path program 1 times [2020-10-11 16:41:11,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:41:11,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101355303] [2020-10-11 16:41:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:41:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:41:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:41:11,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101355303] [2020-10-11 16:41:11,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657841285] [2020-10-11 16:41:11,781 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 [2020-10-11 16:41:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:41:11,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-11 16:41:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:41:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:41:11,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:41:11,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-10-11 16:41:11,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662841695] [2020-10-11 16:41:11,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:41:11,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:41:11,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:41:11,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:41:12,877 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 138 [2020-10-11 16:41:12,878 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 128 transitions, 474 flow. Second operand 9 states. [2020-10-11 16:41:12,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:41:12,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 138 [2020-10-11 16:41:12,878 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:41:18,681 INFO L129 PetriNetUnfolder]: 5164/36268 cut-off events. [2020-10-11 16:41:18,681 INFO L130 PetriNetUnfolder]: For 12704/12704 co-relation queries the response was YES. [2020-10-11 16:41:18,977 INFO L80 FinitePrefix]: Finished finitePrefix Result has 59205 conditions, 36268 events. 5164/36268 cut-off events. For 12704/12704 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 484711 event pairs, 3129 based on Foata normal form. 1/36269 useless extension candidates. Maximal degree in co-relation 59188. Up to 6220 conditions per place. [2020-10-11 16:41:19,047 INFO L132 encePairwiseOnDemand]: 130/138 looper letters, 13 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2020-10-11 16:41:19,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 132 transitions, 526 flow [2020-10-11 16:41:19,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 16:41:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-11 16:41:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 847 transitions. [2020-10-11 16:41:19,050 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8768115942028986 [2020-10-11 16:41:19,050 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 847 transitions. [2020-10-11 16:41:19,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 847 transitions. [2020-10-11 16:41:19,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:41:19,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 847 transitions. [2020-10-11 16:41:19,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-11 16:41:19,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-11 16:41:19,052 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-11 16:41:19,052 INFO L185 Difference]: Start difference. First operand has 144 places, 128 transitions, 474 flow. Second operand 7 states and 847 transitions. [2020-10-11 16:41:19,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 132 transitions, 526 flow [2020-10-11 16:41:19,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 132 transitions, 516 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-11 16:41:19,357 INFO L241 Difference]: Finished difference. Result has 150 places, 131 transitions, 504 flow [2020-10-11 16:41:19,358 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=504, PETRI_PLACES=150, PETRI_TRANSITIONS=131} [2020-10-11 16:41:19,358 INFO L341 CegarLoopForPetriNet]: 136 programPoint places, 14 predicate places. [2020-10-11 16:41:19,358 INFO L481 AbstractCegarLoop]: Abstraction has has 150 places, 131 transitions, 504 flow [2020-10-11 16:41:19,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:41:19,358 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:41:19,358 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:41:19,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-11 16:41:19,559 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:41:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:41:19,560 INFO L82 PathProgramCache]: Analyzing trace with hash -2024722155, now seen corresponding path program 1 times [2020-10-11 16:41:19,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:41:19,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257453488] [2020-10-11 16:41:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:41:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:41:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-11 16:41:19,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257453488] [2020-10-11 16:41:19,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786364664] [2020-10-11 16:41:19,618 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 [2020-10-11 16:41:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:41:19,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 16:41:19,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:41:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:41:19,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:41:19,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-10-11 16:41:19,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101335679] [2020-10-11 16:41:19,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:41:19,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:41:19,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:41:19,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:41:21,211 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 138 [2020-10-11 16:41:21,212 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 131 transitions, 504 flow. Second operand 11 states. [2020-10-11 16:41:21,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:41:21,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 138 [2020-10-11 16:41:21,212 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:41:27,475 INFO L129 PetriNetUnfolder]: 5348/36915 cut-off events. [2020-10-11 16:41:27,475 INFO L130 PetriNetUnfolder]: For 10897/10897 co-relation queries the response was YES. [2020-10-11 16:41:27,810 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60490 conditions, 36915 events. 5348/36915 cut-off events. For 10897/10897 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 495716 event pairs, 3368 based on Foata normal form. 53/36968 useless extension candidates. Maximal degree in co-relation 60470. Up to 8212 conditions per place. [2020-10-11 16:41:27,885 INFO L132 encePairwiseOnDemand]: 127/138 looper letters, 16 selfloop transitions, 14 changer transitions 0/139 dead transitions. [2020-10-11 16:41:27,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 139 transitions, 592 flow [2020-10-11 16:41:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 16:41:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 16:41:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1423 transitions. [2020-10-11 16:41:27,887 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8592995169082126 [2020-10-11 16:41:27,887 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1423 transitions. [2020-10-11 16:41:27,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1423 transitions. [2020-10-11 16:41:27,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:41:27,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1423 transitions. [2020-10-11 16:41:27,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 16:41:27,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 16:41:27,891 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 16:41:27,891 INFO L185 Difference]: Start difference. First operand has 150 places, 131 transitions, 504 flow. Second operand 12 states and 1423 transitions. [2020-10-11 16:41:27,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 139 transitions, 592 flow [2020-10-11 16:41:28,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 139 transitions, 580 flow, removed 1 selfloop flow, removed 3 redundant places. [2020-10-11 16:41:28,174 INFO L241 Difference]: Finished difference. Result has 163 places, 137 transitions, 572 flow [2020-10-11 16:41:28,175 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=572, PETRI_PLACES=163, PETRI_TRANSITIONS=137} [2020-10-11 16:41:28,175 INFO L341 CegarLoopForPetriNet]: 136 programPoint places, 27 predicate places. [2020-10-11 16:41:28,175 INFO L481 AbstractCegarLoop]: Abstraction has has 163 places, 137 transitions, 572 flow [2020-10-11 16:41:28,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:41:28,175 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:41:28,175 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:41:28,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-11 16:41:28,376 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:41:28,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:41:28,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1511182600, now seen corresponding path program 1 times [2020-10-11 16:41:28,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:41:28,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867036634] [2020-10-11 16:41:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:41:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:41:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-11 16:41:28,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867036634] [2020-10-11 16:41:28,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266775937] [2020-10-11 16:41:28,456 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 [2020-10-11 16:41:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:41:28,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 16:41:28,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:41:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-11 16:41:28,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:41:28,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2020-10-11 16:41:28,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775122133] [2020-10-11 16:41:28,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:41:28,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:41:28,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:41:28,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:41:30,877 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 138 [2020-10-11 16:41:30,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 137 transitions, 572 flow. Second operand 14 states. [2020-10-11 16:41:30,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:41:30,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 138 [2020-10-11 16:41:30,879 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:41:38,785 INFO L129 PetriNetUnfolder]: 5342/43956 cut-off events. [2020-10-11 16:41:38,786 INFO L130 PetriNetUnfolder]: For 17534/17534 co-relation queries the response was YES. [2020-10-11 16:41:39,288 INFO L80 FinitePrefix]: Finished finitePrefix Result has 82087 conditions, 43956 events. 5342/43956 cut-off events. For 17534/17534 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 620859 event pairs, 3366 based on Foata normal form. 1014/44970 useless extension candidates. Maximal degree in co-relation 82062. Up to 8300 conditions per place. [2020-10-11 16:41:39,381 INFO L132 encePairwiseOnDemand]: 123/138 looper letters, 18 selfloop transitions, 21 changer transitions 0/146 dead transitions. [2020-10-11 16:41:39,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 146 transitions, 690 flow [2020-10-11 16:41:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 16:41:39,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-11 16:41:39,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1961 transitions. [2020-10-11 16:41:39,384 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8358908780903666 [2020-10-11 16:41:39,384 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1961 transitions. [2020-10-11 16:41:39,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1961 transitions. [2020-10-11 16:41:39,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:41:39,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1961 transitions. [2020-10-11 16:41:39,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-11 16:41:39,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-11 16:41:39,390 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-11 16:41:39,390 INFO L185 Difference]: Start difference. First operand has 163 places, 137 transitions, 572 flow. Second operand 17 states and 1961 transitions. [2020-10-11 16:41:39,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 146 transitions, 690 flow [2020-10-11 16:41:39,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 146 transitions, 664 flow, removed 5 selfloop flow, removed 6 redundant places. [2020-10-11 16:41:39,681 INFO L241 Difference]: Finished difference. Result has 179 places, 143 transitions, 650 flow [2020-10-11 16:41:39,682 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=650, PETRI_PLACES=179, PETRI_TRANSITIONS=143} [2020-10-11 16:41:39,682 INFO L341 CegarLoopForPetriNet]: 136 programPoint places, 43 predicate places. [2020-10-11 16:41:39,682 INFO L481 AbstractCegarLoop]: Abstraction has has 179 places, 143 transitions, 650 flow [2020-10-11 16:41:39,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:41:39,682 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:41:39,682 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:41:39,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-11 16:41:39,890 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:41:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:41:39,891 INFO L82 PathProgramCache]: Analyzing trace with hash -168265549, now seen corresponding path program 1 times [2020-10-11 16:41:39,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:41:39,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387898196] [2020-10-11 16:41:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:41:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:41:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:41:40,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387898196] [2020-10-11 16:41:40,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956590430] [2020-10-11 16:41:40,035 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 [2020-10-11 16:41:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:41:40,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:41:40,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:41:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:41:40,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:41:40,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-10-11 16:41:40,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870790351] [2020-10-11 16:41:40,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 16:41:40,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:41:40,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 16:41:40,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-10-11 16:41:44,080 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 138 [2020-10-11 16:41:44,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 143 transitions, 650 flow. Second operand 21 states. [2020-10-11 16:41:44,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:41:44,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 138 [2020-10-11 16:41:44,082 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:41:51,528 INFO L129 PetriNetUnfolder]: 5330/43879 cut-off events. [2020-10-11 16:41:51,528 INFO L130 PetriNetUnfolder]: For 31450/31450 co-relation queries the response was YES. [2020-10-11 16:41:52,107 INFO L80 FinitePrefix]: Finished finitePrefix Result has 87816 conditions, 43879 events. 5330/43879 cut-off events. For 31450/31450 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 621648 event pairs, 3365 based on Foata normal form. 1/43880 useless extension candidates. Maximal degree in co-relation 87785. Up to 7272 conditions per place. [2020-10-11 16:41:52,209 INFO L132 encePairwiseOnDemand]: 130/138 looper letters, 15 selfloop transitions, 17 changer transitions 0/147 dead transitions. [2020-10-11 16:41:52,210 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 147 transitions, 748 flow [2020-10-11 16:41:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 16:41:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-11 16:41:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1918 transitions. [2020-10-11 16:41:52,212 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8686594202898551 [2020-10-11 16:41:52,212 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1918 transitions. [2020-10-11 16:41:52,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1918 transitions. [2020-10-11 16:41:52,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:41:52,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1918 transitions. [2020-10-11 16:41:52,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-11 16:41:52,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-11 16:41:52,217 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-11 16:41:52,217 INFO L185 Difference]: Start difference. First operand has 179 places, 143 transitions, 650 flow. Second operand 16 states and 1918 transitions. [2020-10-11 16:41:52,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 147 transitions, 748 flow [2020-10-11 16:41:53,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 147 transitions, 704 flow, removed 8 selfloop flow, removed 10 redundant places. [2020-10-11 16:41:53,138 INFO L241 Difference]: Finished difference. Result has 187 places, 146 transitions, 680 flow [2020-10-11 16:41:53,139 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=680, PETRI_PLACES=187, PETRI_TRANSITIONS=146} [2020-10-11 16:41:53,139 INFO L341 CegarLoopForPetriNet]: 136 programPoint places, 51 predicate places. [2020-10-11 16:41:53,139 INFO L481 AbstractCegarLoop]: Abstraction has has 187 places, 146 transitions, 680 flow [2020-10-11 16:41:53,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 16:41:53,139 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:41:53,139 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:41:53,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-11 16:41:53,348 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:41:53,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:41:53,348 INFO L82 PathProgramCache]: Analyzing trace with hash 85353202, now seen corresponding path program 1 times [2020-10-11 16:41:53,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:41:53,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529297333] [2020-10-11 16:41:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:41:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:41:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:41:53,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529297333] [2020-10-11 16:41:53,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444774795] [2020-10-11 16:41:53,510 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 [2020-10-11 16:41:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:41:53,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:41:53,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:41:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:41:53,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:41:53,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2020-10-11 16:41:53,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641534626] [2020-10-11 16:41:53,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 16:41:53,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:41:53,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 16:41:53,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-10-11 16:41:58,941 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 138 [2020-10-11 16:41:58,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 146 transitions, 680 flow. Second operand 25 states. [2020-10-11 16:41:58,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:41:58,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 138 [2020-10-11 16:41:58,944 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:42:06,722 INFO L129 PetriNetUnfolder]: 5310/43769 cut-off events. [2020-10-11 16:42:06,722 INFO L130 PetriNetUnfolder]: For 24369/24369 co-relation queries the response was YES. [2020-10-11 16:42:07,371 INFO L80 FinitePrefix]: Finished finitePrefix Result has 82550 conditions, 43769 events. 5310/43769 cut-off events. For 24369/24369 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 624110 event pairs, 3371 based on Foata normal form. 1/43770 useless extension candidates. Maximal degree in co-relation 82516. Up to 7253 conditions per place. [2020-10-11 16:42:07,491 INFO L132 encePairwiseOnDemand]: 130/138 looper letters, 15 selfloop transitions, 20 changer transitions 0/150 dead transitions. [2020-10-11 16:42:07,491 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 150 transitions, 792 flow [2020-10-11 16:42:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 16:42:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 16:42:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2275 transitions. [2020-10-11 16:42:07,494 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8676582761250954 [2020-10-11 16:42:07,494 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2275 transitions. [2020-10-11 16:42:07,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2275 transitions. [2020-10-11 16:42:07,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:42:07,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2275 transitions. [2020-10-11 16:42:07,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 16:42:07,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 16:42:07,500 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 16:42:07,500 INFO L185 Difference]: Start difference. First operand has 187 places, 146 transitions, 680 flow. Second operand 19 states and 2275 transitions. [2020-10-11 16:42:07,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 150 transitions, 792 flow [2020-10-11 16:42:09,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 150 transitions, 746 flow, removed 10 selfloop flow, removed 11 redundant places. [2020-10-11 16:42:09,414 INFO L241 Difference]: Finished difference. Result has 197 places, 149 transitions, 720 flow [2020-10-11 16:42:09,415 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=720, PETRI_PLACES=197, PETRI_TRANSITIONS=149} [2020-10-11 16:42:09,415 INFO L341 CegarLoopForPetriNet]: 136 programPoint places, 61 predicate places. [2020-10-11 16:42:09,415 INFO L481 AbstractCegarLoop]: Abstraction has has 197 places, 149 transitions, 720 flow [2020-10-11 16:42:09,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 16:42:09,415 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:42:09,415 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:42:09,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:42:09,630 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:42:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:42:09,630 INFO L82 PathProgramCache]: Analyzing trace with hash -183251286, now seen corresponding path program 1 times [2020-10-11 16:42:09,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:42:09,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423915963] [2020-10-11 16:42:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:42:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:42:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:42:09,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423915963] [2020-10-11 16:42:09,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402390891] [2020-10-11 16:42:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 16:42:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:42:09,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 16:42:09,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:42:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:42:10,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:42:10,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2020-10-11 16:42:10,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055331085] [2020-10-11 16:42:10,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 16:42:10,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:42:10,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 16:42:10,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2020-10-11 16:42:17,703 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 138 [2020-10-11 16:42:17,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 149 transitions, 720 flow. Second operand 29 states. [2020-10-11 16:42:17,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:42:17,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 138 [2020-10-11 16:42:17,705 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:42:29,201 INFO L129 PetriNetUnfolder]: 5280/43620 cut-off events. [2020-10-11 16:42:29,201 INFO L130 PetriNetUnfolder]: For 24348/24348 co-relation queries the response was YES. [2020-10-11 16:42:29,786 INFO L80 FinitePrefix]: Finished finitePrefix Result has 82265 conditions, 43620 events. 5280/43620 cut-off events. For 24348/24348 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 629747 event pairs, 3398 based on Foata normal form. 1/43621 useless extension candidates. Maximal degree in co-relation 82228. Up to 7228 conditions per place. [2020-10-11 16:42:29,878 INFO L132 encePairwiseOnDemand]: 130/138 looper letters, 15 selfloop transitions, 23 changer transitions 0/153 dead transitions. [2020-10-11 16:42:29,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 153 transitions, 846 flow [2020-10-11 16:42:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 16:42:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-11 16:42:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2632 transitions. [2020-10-11 16:42:29,882 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8669301712779973 [2020-10-11 16:42:29,882 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2632 transitions. [2020-10-11 16:42:29,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2632 transitions. [2020-10-11 16:42:29,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:42:29,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2632 transitions. [2020-10-11 16:42:29,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-11 16:42:29,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-11 16:42:29,890 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-11 16:42:29,890 INFO L185 Difference]: Start difference. First operand has 197 places, 149 transitions, 720 flow. Second operand 22 states and 2632 transitions. [2020-10-11 16:42:29,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 153 transitions, 846 flow [2020-10-11 16:42:30,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 153 transitions, 786 flow, removed 13 selfloop flow, removed 15 redundant places. [2020-10-11 16:42:30,675 INFO L241 Difference]: Finished difference. Result has 206 places, 152 transitions, 758 flow [2020-10-11 16:42:30,675 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=758, PETRI_PLACES=206, PETRI_TRANSITIONS=152} [2020-10-11 16:42:30,675 INFO L341 CegarLoopForPetriNet]: 136 programPoint places, 70 predicate places. [2020-10-11 16:42:30,676 INFO L481 AbstractCegarLoop]: Abstraction has has 206 places, 152 transitions, 758 flow [2020-10-11 16:42:30,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 16:42:30,676 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:42:30,676 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:42:30,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-11 16:42:30,877 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:42:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:42:30,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1251950318, now seen corresponding path program 1 times [2020-10-11 16:42:30,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:42:30,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417781063] [2020-10-11 16:42:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:42:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:42:30,906 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:42:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:42:30,953 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:42:30,981 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 16:42:30,982 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 16:42:30,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-11 16:42:30,982 WARN L371 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-11 16:42:30,982 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2020-10-11 16:42:30,994 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of11ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,995 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of11ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,995 WARN L313 ript$VariableManager]: TermVariabe threadThread7of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,995 WARN L313 ript$VariableManager]: TermVariabe threadThread7of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,995 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,995 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,995 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of11ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,996 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of11ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,996 WARN L313 ript$VariableManager]: TermVariabe threadThread10of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,996 WARN L313 ript$VariableManager]: TermVariabe threadThread10of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,996 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,996 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,996 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of11ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,996 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of11ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,997 WARN L313 ript$VariableManager]: TermVariabe threadThread6of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,997 WARN L313 ript$VariableManager]: TermVariabe threadThread6of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,997 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,997 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,997 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of11ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,997 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of11ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,997 WARN L313 ript$VariableManager]: TermVariabe threadThread8of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,998 WARN L313 ript$VariableManager]: TermVariabe threadThread8of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,998 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,998 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,998 WARN L313 ript$VariableManager]: TermVariabe |threadThread11of11ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,998 WARN L313 ript$VariableManager]: TermVariabe |threadThread11of11ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,998 WARN L313 ript$VariableManager]: TermVariabe threadThread11of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,998 WARN L313 ript$VariableManager]: TermVariabe threadThread11of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,998 WARN L313 ript$VariableManager]: TermVariabe |threadThread11of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,999 WARN L313 ript$VariableManager]: TermVariabe |threadThread11of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,999 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of11ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,999 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of11ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,999 WARN L313 ript$VariableManager]: TermVariabe threadThread1of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,999 WARN L313 ript$VariableManager]: TermVariabe threadThread1of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,999 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:30,999 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,000 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of11ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,000 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of11ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,000 WARN L313 ript$VariableManager]: TermVariabe threadThread5of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,000 WARN L313 ript$VariableManager]: TermVariabe threadThread5of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,000 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,000 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,000 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of11ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,000 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of11ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,001 WARN L313 ript$VariableManager]: TermVariabe threadThread9of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,001 WARN L313 ript$VariableManager]: TermVariabe threadThread9of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,001 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,001 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,001 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of11ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,001 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of11ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,001 WARN L313 ript$VariableManager]: TermVariabe threadThread3of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,001 WARN L313 ript$VariableManager]: TermVariabe threadThread3of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,002 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,002 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,010 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of11ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,010 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of11ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,010 WARN L313 ript$VariableManager]: TermVariabe threadThread2of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,010 WARN L313 ript$VariableManager]: TermVariabe threadThread2of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,011 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,011 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,011 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of11ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,011 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of11ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,011 WARN L313 ript$VariableManager]: TermVariabe threadThread4of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,011 WARN L313 ript$VariableManager]: TermVariabe threadThread4of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,012 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,012 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,012 WARN L313 ript$VariableManager]: TermVariabe threadThread1of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,012 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,012 WARN L313 ript$VariableManager]: TermVariabe threadThread1of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,012 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,014 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,015 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,015 WARN L313 ript$VariableManager]: TermVariabe threadThread2of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,015 WARN L313 ript$VariableManager]: TermVariabe threadThread2of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,019 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,020 WARN L313 ript$VariableManager]: TermVariabe threadThread3of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,020 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,020 WARN L313 ript$VariableManager]: TermVariabe threadThread3of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,023 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,023 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,023 WARN L313 ript$VariableManager]: TermVariabe threadThread4of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,023 WARN L313 ript$VariableManager]: TermVariabe threadThread4of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,025 WARN L313 ript$VariableManager]: TermVariabe threadThread5of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,025 WARN L313 ript$VariableManager]: TermVariabe threadThread5of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,025 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,025 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,026 WARN L313 ript$VariableManager]: TermVariabe threadThread6of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,027 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,027 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,027 WARN L313 ript$VariableManager]: TermVariabe threadThread6of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,028 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,028 WARN L313 ript$VariableManager]: TermVariabe threadThread7of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,029 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,029 WARN L313 ript$VariableManager]: TermVariabe threadThread7of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,030 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,031 WARN L313 ript$VariableManager]: TermVariabe threadThread8of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,031 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,031 WARN L313 ript$VariableManager]: TermVariabe threadThread8of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,032 WARN L313 ript$VariableManager]: TermVariabe threadThread9of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,032 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,033 WARN L313 ript$VariableManager]: TermVariabe threadThread9of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,033 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,034 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,035 WARN L313 ript$VariableManager]: TermVariabe threadThread10of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,035 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,035 WARN L313 ript$VariableManager]: TermVariabe threadThread10of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,036 WARN L313 ript$VariableManager]: TermVariabe |threadThread11of11ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,037 WARN L313 ript$VariableManager]: TermVariabe threadThread11of11ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,037 WARN L313 ript$VariableManager]: TermVariabe |threadThread11of11ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,037 WARN L313 ript$VariableManager]: TermVariabe threadThread11of11ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:42:31,048 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 16:42:31,048 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:42:31,048 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:42:31,049 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:42:31,049 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:42:31,049 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:42:31,049 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:42:31,049 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:42:31,049 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:42:31,051 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 149 places, 144 transitions, 486 flow [2020-10-11 16:42:43,939 INFO L129 PetriNetUnfolder]: 17434/79092 cut-off events. [2020-10-11 16:42:43,940 INFO L130 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2020-10-11 16:42:44,632 INFO L80 FinitePrefix]: Finished finitePrefix Result has 90456 conditions, 79092 events. 17434/79092 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1410. Compared 1090467 event pairs, 7181 based on Foata normal form. 0/66778 useless extension candidates. Maximal degree in co-relation 44321. Up to 11264 conditions per place. [2020-10-11 16:42:44,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 144 transitions, 486 flow [2020-10-11 16:42:44,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 137 transitions, 472 flow [2020-10-11 16:42:44,812 INFO L129 PetriNetUnfolder]: 5/66 cut-off events. [2020-10-11 16:42:44,812 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:42:44,812 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:42:44,812 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:42:44,812 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:42:44,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:42:44,812 INFO L82 PathProgramCache]: Analyzing trace with hash 857407167, now seen corresponding path program 1 times [2020-10-11 16:42:44,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:42:44,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781526025] [2020-10-11 16:42:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:42:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:42:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:42:44,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781526025] [2020-10-11 16:42:44,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:42:44,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:42:44,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61549458] [2020-10-11 16:42:44,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:42:44,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:42:44,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:42:44,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:42:44,822 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 144 [2020-10-11 16:42:44,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 137 transitions, 472 flow. Second operand 2 states. [2020-10-11 16:42:44,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:42:44,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 144 [2020-10-11 16:42:44,823 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:42:54,559 INFO L129 PetriNetUnfolder]: 11276/60646 cut-off events. [2020-10-11 16:42:54,560 INFO L130 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2020-10-11 16:42:55,133 INFO L80 FinitePrefix]: Finished finitePrefix Result has 72011 conditions, 60646 events. 11276/60646 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1116. Compared 834196 event pairs, 7181 based on Foata normal form. 4110/60646 useless extension candidates. Maximal degree in co-relation 71998. Up to 11264 conditions per place. [2020-10-11 16:42:55,276 INFO L132 encePairwiseOnDemand]: 139/144 looper letters, 0 selfloop transitions, 0 changer transitions 2/132 dead transitions. [2020-10-11 16:42:55,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 132 transitions, 462 flow [2020-10-11 16:42:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:42:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:42:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 281 transitions. [2020-10-11 16:42:55,277 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9756944444444444 [2020-10-11 16:42:55,278 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 281 transitions. [2020-10-11 16:42:55,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 281 transitions. [2020-10-11 16:42:55,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:42:55,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 281 transitions. [2020-10-11 16:42:55,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:42:55,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:42:55,279 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:42:55,279 INFO L185 Difference]: Start difference. First operand has 143 places, 137 transitions, 472 flow. Second operand 2 states and 281 transitions. [2020-10-11 16:42:55,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 132 transitions, 462 flow [2020-10-11 16:42:55,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 132 transitions, 462 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:42:55,290 INFO L241 Difference]: Finished difference. Result has 144 places, 130 transitions, 458 flow [2020-10-11 16:42:55,291 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=458, PETRI_PLACES=144, PETRI_TRANSITIONS=130} [2020-10-11 16:42:55,291 INFO L341 CegarLoopForPetriNet]: 143 programPoint places, 1 predicate places. [2020-10-11 16:42:55,291 INFO L481 AbstractCegarLoop]: Abstraction has has 144 places, 130 transitions, 458 flow [2020-10-11 16:42:55,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:42:55,291 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:42:55,291 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:42:55,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-11 16:42:55,291 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:42:55,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:42:55,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1576597792, now seen corresponding path program 1 times [2020-10-11 16:42:55,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:42:55,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471519926] [2020-10-11 16:42:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:42:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:42:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:42:55,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471519926] [2020-10-11 16:42:55,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:42:55,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:42:55,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149563417] [2020-10-11 16:42:55,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:42:55,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:42:55,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:42:55,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:42:55,551 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 144 [2020-10-11 16:42:55,551 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 130 transitions, 458 flow. Second operand 4 states. [2020-10-11 16:42:55,551 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:42:55,552 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 144 [2020-10-11 16:42:55,552 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:43:05,640 INFO L129 PetriNetUnfolder]: 11319/60931 cut-off events. [2020-10-11 16:43:05,640 INFO L130 PetriNetUnfolder]: For 11594/11594 co-relation queries the response was YES. [2020-10-11 16:43:06,283 INFO L80 FinitePrefix]: Finished finitePrefix Result has 82679 conditions, 60931 events. 11319/60931 cut-off events. For 11594/11594 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 842473 event pairs, 7236 based on Foata normal form. 12/60943 useless extension candidates. Maximal degree in co-relation 82665. Up to 11319 conditions per place. [2020-10-11 16:43:06,435 INFO L132 encePairwiseOnDemand]: 137/144 looper letters, 9 selfloop transitions, 5 changer transitions 0/132 dead transitions. [2020-10-11 16:43:06,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 132 transitions, 490 flow [2020-10-11 16:43:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:43:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:43:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 520 transitions. [2020-10-11 16:43:06,436 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9027777777777778 [2020-10-11 16:43:06,436 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 520 transitions. [2020-10-11 16:43:06,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 520 transitions. [2020-10-11 16:43:06,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:43:06,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 520 transitions. [2020-10-11 16:43:06,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:43:06,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:43:06,437 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:43:06,438 INFO L185 Difference]: Start difference. First operand has 144 places, 130 transitions, 458 flow. Second operand 4 states and 520 transitions. [2020-10-11 16:43:06,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 132 transitions, 490 flow [2020-10-11 16:43:06,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 132 transitions, 490 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:43:06,445 INFO L241 Difference]: Finished difference. Result has 146 places, 132 transitions, 484 flow [2020-10-11 16:43:06,445 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=484, PETRI_PLACES=146, PETRI_TRANSITIONS=132} [2020-10-11 16:43:06,445 INFO L341 CegarLoopForPetriNet]: 143 programPoint places, 3 predicate places. [2020-10-11 16:43:06,446 INFO L481 AbstractCegarLoop]: Abstraction has has 146 places, 132 transitions, 484 flow [2020-10-11 16:43:06,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:43:06,446 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:43:06,446 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:43:06,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-11 16:43:06,446 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:43:06,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:43:06,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1495683739, now seen corresponding path program 1 times [2020-10-11 16:43:06,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:43:06,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142878437] [2020-10-11 16:43:06,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:43:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:43:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:43:06,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142878437] [2020-10-11 16:43:06,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:43:06,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-11 16:43:06,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045995029] [2020-10-11 16:43:06,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 16:43:06,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:43:06,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 16:43:06,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 16:43:06,926 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 144 [2020-10-11 16:43:06,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 132 transitions, 484 flow. Second operand 5 states. [2020-10-11 16:43:06,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:43:06,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 144 [2020-10-11 16:43:06,927 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:43:25,862 INFO L129 PetriNetUnfolder]: 11319/73213 cut-off events. [2020-10-11 16:43:25,863 INFO L130 PetriNetUnfolder]: For 15769/15769 co-relation queries the response was YES. [2020-10-11 16:43:26,584 INFO L80 FinitePrefix]: Finished finitePrefix Result has 107403 conditions, 73213 events. 11319/73213 cut-off events. For 15769/15769 co-relation queries the response was YES. Maximal size of possible extension queue 1410. Compared 1084398 event pairs, 7236 based on Foata normal form. 2047/75260 useless extension candidates. Maximal degree in co-relation 107387. Up to 12363 conditions per place. [2020-10-11 16:43:26,739 INFO L132 encePairwiseOnDemand]: 134/144 looper letters, 10 selfloop transitions, 9 changer transitions 0/134 dead transitions. [2020-10-11 16:43:26,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 134 transitions, 526 flow [2020-10-11 16:43:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 16:43:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 16:43:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 758 transitions. [2020-10-11 16:43:26,740 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8773148148148148 [2020-10-11 16:43:26,741 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 758 transitions. [2020-10-11 16:43:26,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 758 transitions. [2020-10-11 16:43:26,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:43:26,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 758 transitions. [2020-10-11 16:43:26,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 16:43:26,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 16:43:26,742 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 16:43:26,742 INFO L185 Difference]: Start difference. First operand has 146 places, 132 transitions, 484 flow. Second operand 6 states and 758 transitions. [2020-10-11 16:43:26,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 134 transitions, 526 flow [2020-10-11 16:43:26,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 134 transitions, 520 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:43:26,757 INFO L241 Difference]: Finished difference. Result has 151 places, 134 transitions, 514 flow [2020-10-11 16:43:26,757 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=151, PETRI_TRANSITIONS=134} [2020-10-11 16:43:26,758 INFO L341 CegarLoopForPetriNet]: 143 programPoint places, 8 predicate places. [2020-10-11 16:43:26,758 INFO L481 AbstractCegarLoop]: Abstraction has has 151 places, 134 transitions, 514 flow [2020-10-11 16:43:26,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 16:43:26,758 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:43:26,758 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:43:26,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-11 16:43:26,758 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:43:26,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:43:26,759 INFO L82 PathProgramCache]: Analyzing trace with hash 167325840, now seen corresponding path program 1 times [2020-10-11 16:43:26,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:43:26,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584897202] [2020-10-11 16:43:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:43:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:43:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:43:26,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584897202] [2020-10-11 16:43:26,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948404293] [2020-10-11 16:43:26,813 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 [2020-10-11 16:43:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:43:26,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-11 16:43:26,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:43:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:43:26,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:43:26,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-10-11 16:43:26,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752904362] [2020-10-11 16:43:26,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:43:26,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:43:26,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:43:26,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:43:27,816 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 144 [2020-10-11 16:43:27,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 134 transitions, 514 flow. Second operand 9 states. [2020-10-11 16:43:27,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:43:27,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 144 [2020-10-11 16:43:27,818 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:43:41,698 INFO L129 PetriNetUnfolder]: 11318/73203 cut-off events. [2020-10-11 16:43:41,698 INFO L130 PetriNetUnfolder]: For 26124/26124 co-relation queries the response was YES. [2020-10-11 16:43:42,563 INFO L80 FinitePrefix]: Finished finitePrefix Result has 119767 conditions, 73203 events. 11318/73203 cut-off events. For 26124/26124 co-relation queries the response was YES. Maximal size of possible extension queue 1410. Compared 1084570 event pairs, 7236 based on Foata normal form. 1/73204 useless extension candidates. Maximal degree in co-relation 119749. Up to 12378 conditions per place. [2020-10-11 16:43:42,743 INFO L132 encePairwiseOnDemand]: 136/144 looper letters, 13 selfloop transitions, 8 changer transitions 0/138 dead transitions. [2020-10-11 16:43:42,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 138 transitions, 566 flow [2020-10-11 16:43:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 16:43:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-11 16:43:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 889 transitions. [2020-10-11 16:43:42,745 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8819444444444444 [2020-10-11 16:43:42,746 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 889 transitions. [2020-10-11 16:43:42,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 889 transitions. [2020-10-11 16:43:42,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:43:42,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 889 transitions. [2020-10-11 16:43:42,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-11 16:43:42,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-11 16:43:42,749 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-11 16:43:42,749 INFO L185 Difference]: Start difference. First operand has 151 places, 134 transitions, 514 flow. Second operand 7 states and 889 transitions. [2020-10-11 16:43:42,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 138 transitions, 566 flow [2020-10-11 16:43:44,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 138 transitions, 556 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-11 16:43:44,490 INFO L241 Difference]: Finished difference. Result has 157 places, 137 transitions, 544 flow [2020-10-11 16:43:44,490 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=544, PETRI_PLACES=157, PETRI_TRANSITIONS=137} [2020-10-11 16:43:44,490 INFO L341 CegarLoopForPetriNet]: 143 programPoint places, 14 predicate places. [2020-10-11 16:43:44,491 INFO L481 AbstractCegarLoop]: Abstraction has has 157 places, 137 transitions, 544 flow [2020-10-11 16:43:44,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:43:44,491 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:43:44,491 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:43:44,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:43:44,692 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:43:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:43:44,693 INFO L82 PathProgramCache]: Analyzing trace with hash -880609336, now seen corresponding path program 1 times [2020-10-11 16:43:44,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:43:44,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022613331] [2020-10-11 16:43:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:43:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:43:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-11 16:43:44,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022613331] [2020-10-11 16:43:44,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538571381] [2020-10-11 16:43:44,752 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 [2020-10-11 16:43:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:43:44,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 16:43:44,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:43:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:43:44,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:43:44,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-10-11 16:43:44,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807289370] [2020-10-11 16:43:44,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:43:44,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:43:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:43:44,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:43:46,233 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 144 [2020-10-11 16:43:46,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 137 transitions, 544 flow. Second operand 11 states. [2020-10-11 16:43:46,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:43:46,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 144 [2020-10-11 16:43:46,235 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:44:01,800 INFO L129 PetriNetUnfolder]: 11581/74138 cut-off events. [2020-10-11 16:44:01,800 INFO L130 PetriNetUnfolder]: For 22360/22360 co-relation queries the response was YES. [2020-10-11 16:44:02,684 INFO L80 FinitePrefix]: Finished finitePrefix Result has 121588 conditions, 74138 events. 11581/74138 cut-off events. For 22360/22360 co-relation queries the response was YES. Maximal size of possible extension queue 1410. Compared 1100397 event pairs, 7565 based on Foata normal form. 64/74202 useless extension candidates. Maximal degree in co-relation 121567. Up to 16435 conditions per place. [2020-10-11 16:44:02,862 INFO L132 encePairwiseOnDemand]: 133/144 looper letters, 16 selfloop transitions, 14 changer transitions 0/145 dead transitions. [2020-10-11 16:44:02,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 145 transitions, 632 flow [2020-10-11 16:44:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 16:44:02,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 16:44:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1495 transitions. [2020-10-11 16:44:02,865 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8651620370370371 [2020-10-11 16:44:02,865 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1495 transitions. [2020-10-11 16:44:02,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1495 transitions. [2020-10-11 16:44:02,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:44:02,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1495 transitions. [2020-10-11 16:44:02,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 16:44:02,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 16:44:02,868 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 16:44:02,868 INFO L185 Difference]: Start difference. First operand has 157 places, 137 transitions, 544 flow. Second operand 12 states and 1495 transitions. [2020-10-11 16:44:02,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 145 transitions, 632 flow [2020-10-11 16:44:04,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 145 transitions, 620 flow, removed 1 selfloop flow, removed 3 redundant places. [2020-10-11 16:44:04,146 INFO L241 Difference]: Finished difference. Result has 170 places, 143 transitions, 612 flow [2020-10-11 16:44:04,146 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=612, PETRI_PLACES=170, PETRI_TRANSITIONS=143} [2020-10-11 16:44:04,147 INFO L341 CegarLoopForPetriNet]: 143 programPoint places, 27 predicate places. [2020-10-11 16:44:04,147 INFO L481 AbstractCegarLoop]: Abstraction has has 170 places, 143 transitions, 612 flow [2020-10-11 16:44:04,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:44:04,147 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:44:04,147 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:44:04,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-11 16:44:04,348 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:44:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:44:04,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1933877668, now seen corresponding path program 1 times [2020-10-11 16:44:04,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:44:04,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717179777] [2020-10-11 16:44:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:44:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:44:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-11 16:44:04,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717179777] [2020-10-11 16:44:04,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245186091] [2020-10-11 16:44:04,431 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 [2020-10-11 16:44:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:44:04,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 16:44:04,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:44:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-11 16:44:04,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:44:04,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2020-10-11 16:44:04,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168992893] [2020-10-11 16:44:04,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:44:04,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:44:04,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:44:04,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:44:07,273 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 144 [2020-10-11 16:44:07,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 143 transitions, 612 flow. Second operand 14 states. [2020-10-11 16:44:07,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:44:07,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 144 [2020-10-11 16:44:07,275 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:44:29,654 INFO L129 PetriNetUnfolder]: 11575/88340 cut-off events. [2020-10-11 16:44:29,655 INFO L130 PetriNetUnfolder]: For 35313/35313 co-relation queries the response was YES. [2020-10-11 16:44:30,952 INFO L80 FinitePrefix]: Finished finitePrefix Result has 164794 conditions, 88340 events. 11575/88340 cut-off events. For 35313/35313 co-relation queries the response was YES. Maximal size of possible extension queue 1327. Compared 1377706 event pairs, 7563 based on Foata normal form. 2037/90377 useless extension candidates. Maximal degree in co-relation 164768. Up to 16544 conditions per place. [2020-10-11 16:44:31,171 INFO L132 encePairwiseOnDemand]: 129/144 looper letters, 18 selfloop transitions, 21 changer transitions 0/152 dead transitions. [2020-10-11 16:44:31,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 152 transitions, 730 flow [2020-10-11 16:44:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 16:44:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-11 16:44:31,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2063 transitions. [2020-10-11 16:44:31,174 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8427287581699346 [2020-10-11 16:44:31,174 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2063 transitions. [2020-10-11 16:44:31,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2063 transitions. [2020-10-11 16:44:31,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:44:31,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2063 transitions. [2020-10-11 16:44:31,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-11 16:44:31,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-11 16:44:31,178 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-11 16:44:31,178 INFO L185 Difference]: Start difference. First operand has 170 places, 143 transitions, 612 flow. Second operand 17 states and 2063 transitions. [2020-10-11 16:44:31,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 152 transitions, 730 flow [2020-10-11 16:44:32,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 152 transitions, 704 flow, removed 5 selfloop flow, removed 6 redundant places. [2020-10-11 16:44:32,477 INFO L241 Difference]: Finished difference. Result has 186 places, 149 transitions, 690 flow [2020-10-11 16:44:32,477 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=690, PETRI_PLACES=186, PETRI_TRANSITIONS=149} [2020-10-11 16:44:32,477 INFO L341 CegarLoopForPetriNet]: 143 programPoint places, 43 predicate places. [2020-10-11 16:44:32,477 INFO L481 AbstractCegarLoop]: Abstraction has has 186 places, 149 transitions, 690 flow [2020-10-11 16:44:32,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:44:32,477 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:44:32,478 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:44:32,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-11 16:44:32,684 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:44:32,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:44:32,684 INFO L82 PathProgramCache]: Analyzing trace with hash 738514035, now seen corresponding path program 1 times [2020-10-11 16:44:32,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:44:32,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035155105] [2020-10-11 16:44:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:44:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:44:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:44:32,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035155105] [2020-10-11 16:44:32,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500992103] [2020-10-11 16:44:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-11 16:44:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:44:32,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:44:32,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:44:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:44:33,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:44:33,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-10-11 16:44:33,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184552355] [2020-10-11 16:44:33,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 16:44:33,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:44:33,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 16:44:33,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-10-11 16:44:37,237 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 144 [2020-10-11 16:44:37,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 149 transitions, 690 flow. Second operand 21 states. [2020-10-11 16:44:37,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:44:37,240 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 144 [2020-10-11 16:44:37,240 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:44:58,248 INFO L129 PetriNetUnfolder]: 11563/88263 cut-off events. [2020-10-11 16:44:58,249 INFO L130 PetriNetUnfolder]: For 63456/63456 co-relation queries the response was YES. [2020-10-11 16:44:59,771 INFO L80 FinitePrefix]: Finished finitePrefix Result has 176577 conditions, 88263 events. 11563/88263 cut-off events. For 63456/63456 co-relation queries the response was YES. Maximal size of possible extension queue 1327. Compared 1378515 event pairs, 7562 based on Foata normal form. 1/88264 useless extension candidates. Maximal degree in co-relation 176545. Up to 14493 conditions per place. [2020-10-11 16:45:00,011 INFO L132 encePairwiseOnDemand]: 136/144 looper letters, 15 selfloop transitions, 17 changer transitions 0/153 dead transitions. [2020-10-11 16:45:00,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 153 transitions, 788 flow [2020-10-11 16:45:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 16:45:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-11 16:45:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2014 transitions. [2020-10-11 16:45:00,014 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8741319444444444 [2020-10-11 16:45:00,014 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2014 transitions. [2020-10-11 16:45:00,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2014 transitions. [2020-10-11 16:45:00,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:45:00,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2014 transitions. [2020-10-11 16:45:00,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-11 16:45:00,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-11 16:45:00,020 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-11 16:45:00,020 INFO L185 Difference]: Start difference. First operand has 186 places, 149 transitions, 690 flow. Second operand 16 states and 2014 transitions. [2020-10-11 16:45:00,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 153 transitions, 788 flow [2020-10-11 16:45:15,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 153 transitions, 744 flow, removed 8 selfloop flow, removed 10 redundant places. [2020-10-11 16:45:15,367 INFO L241 Difference]: Finished difference. Result has 194 places, 152 transitions, 720 flow [2020-10-11 16:45:15,368 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=720, PETRI_PLACES=194, PETRI_TRANSITIONS=152} [2020-10-11 16:45:15,368 INFO L341 CegarLoopForPetriNet]: 143 programPoint places, 51 predicate places. [2020-10-11 16:45:15,368 INFO L481 AbstractCegarLoop]: Abstraction has has 194 places, 152 transitions, 720 flow [2020-10-11 16:45:15,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 16:45:15,368 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:45:15,368 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:45:15,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-11 16:45:15,569 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:45:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:45:15,570 INFO L82 PathProgramCache]: Analyzing trace with hash 35856310, now seen corresponding path program 1 times [2020-10-11 16:45:15,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:45:15,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278928668] [2020-10-11 16:45:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:45:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:45:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:45:15,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278928668] [2020-10-11 16:45:15,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067435294] [2020-10-11 16:45:15,755 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 [2020-10-11 16:45:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:45:15,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:45:15,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:45:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:45:16,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:45:16,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2020-10-11 16:45:16,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450134515] [2020-10-11 16:45:16,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 16:45:16,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:45:16,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 16:45:16,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-10-11 16:45:22,705 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 144 [2020-10-11 16:45:22,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 152 transitions, 720 flow. Second operand 25 states. [2020-10-11 16:45:22,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:45:22,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 144 [2020-10-11 16:45:22,708 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:45:50,333 INFO L129 PetriNetUnfolder]: 11543/88153 cut-off events. [2020-10-11 16:45:50,333 INFO L130 PetriNetUnfolder]: For 49229/49229 co-relation queries the response was YES. [2020-10-11 16:45:51,881 INFO L80 FinitePrefix]: Finished finitePrefix Result has 166200 conditions, 88153 events. 11543/88153 cut-off events. For 49229/49229 co-relation queries the response was YES. Maximal size of possible extension queue 1327. Compared 1381328 event pairs, 7568 based on Foata normal form. 1/88154 useless extension candidates. Maximal degree in co-relation 166165. Up to 14474 conditions per place. [2020-10-11 16:45:52,109 INFO L132 encePairwiseOnDemand]: 136/144 looper letters, 15 selfloop transitions, 20 changer transitions 0/156 dead transitions. [2020-10-11 16:45:52,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 156 transitions, 832 flow [2020-10-11 16:45:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 16:45:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 16:45:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2389 transitions. [2020-10-11 16:45:52,113 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.873172514619883 [2020-10-11 16:45:52,113 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2389 transitions. [2020-10-11 16:45:52,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2389 transitions. [2020-10-11 16:45:52,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:45:52,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2389 transitions. [2020-10-11 16:45:52,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 16:45:52,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 16:45:52,119 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 16:45:52,120 INFO L185 Difference]: Start difference. First operand has 194 places, 152 transitions, 720 flow. Second operand 19 states and 2389 transitions. [2020-10-11 16:45:52,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 156 transitions, 832 flow [2020-10-11 16:45:58,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 156 transitions, 786 flow, removed 10 selfloop flow, removed 11 redundant places. [2020-10-11 16:45:58,207 INFO L241 Difference]: Finished difference. Result has 204 places, 155 transitions, 760 flow [2020-10-11 16:45:58,207 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=760, PETRI_PLACES=204, PETRI_TRANSITIONS=155} [2020-10-11 16:45:58,207 INFO L341 CegarLoopForPetriNet]: 143 programPoint places, 61 predicate places. [2020-10-11 16:45:58,207 INFO L481 AbstractCegarLoop]: Abstraction has has 204 places, 155 transitions, 760 flow [2020-10-11 16:45:58,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 16:45:58,207 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:45:58,208 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:45:58,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-11 16:45:58,408 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:45:58,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:45:58,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1279931850, now seen corresponding path program 1 times [2020-10-11 16:45:58,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:45:58,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721427459] [2020-10-11 16:45:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:45:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:45:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:45:58,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721427459] [2020-10-11 16:45:58,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256639749] [2020-10-11 16:45:58,631 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 [2020-10-11 16:45:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:45:58,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 16:45:58,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:45:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:45:59,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:45:59,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2020-10-11 16:45:59,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809060013] [2020-10-11 16:45:59,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 16:45:59,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:45:59,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 16:45:59,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2020-10-11 16:46:08,716 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 144 [2020-10-11 16:46:08,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 155 transitions, 760 flow. Second operand 29 states. [2020-10-11 16:46:08,718 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:46:08,718 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 144 [2020-10-11 16:46:08,718 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:46:30,207 INFO L129 PetriNetUnfolder]: 11513/88004 cut-off events. [2020-10-11 16:46:30,207 INFO L130 PetriNetUnfolder]: For 49227/49227 co-relation queries the response was YES. [2020-10-11 16:46:32,022 INFO L80 FinitePrefix]: Finished finitePrefix Result has 165919 conditions, 88004 events. 11513/88004 cut-off events. For 49227/49227 co-relation queries the response was YES. Maximal size of possible extension queue 1329. Compared 1388116 event pairs, 7595 based on Foata normal form. 1/88005 useless extension candidates. Maximal degree in co-relation 165881. Up to 14449 conditions per place. [2020-10-11 16:46:32,276 INFO L132 encePairwiseOnDemand]: 136/144 looper letters, 15 selfloop transitions, 23 changer transitions 0/159 dead transitions. [2020-10-11 16:46:32,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 159 transitions, 886 flow [2020-10-11 16:46:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 16:46:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-11 16:46:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2764 transitions. [2020-10-11 16:46:32,280 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8724747474747475 [2020-10-11 16:46:32,280 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2764 transitions. [2020-10-11 16:46:32,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2764 transitions. [2020-10-11 16:46:32,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:46:32,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2764 transitions. [2020-10-11 16:46:32,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-11 16:46:32,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-11 16:46:32,285 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-11 16:46:32,285 INFO L185 Difference]: Start difference. First operand has 204 places, 155 transitions, 760 flow. Second operand 22 states and 2764 transitions. [2020-10-11 16:46:32,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 159 transitions, 886 flow [2020-10-11 16:46:48,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 159 transitions, 826 flow, removed 13 selfloop flow, removed 15 redundant places. [2020-10-11 16:46:48,149 INFO L241 Difference]: Finished difference. Result has 213 places, 158 transitions, 798 flow [2020-10-11 16:46:48,150 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=798, PETRI_PLACES=213, PETRI_TRANSITIONS=158} [2020-10-11 16:46:48,150 INFO L341 CegarLoopForPetriNet]: 143 programPoint places, 70 predicate places. [2020-10-11 16:46:48,150 INFO L481 AbstractCegarLoop]: Abstraction has has 213 places, 158 transitions, 798 flow [2020-10-11 16:46:48,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 16:46:48,150 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:46:48,150 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:46:48,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-11 16:46:48,351 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:46:48,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:46:48,352 INFO L82 PathProgramCache]: Analyzing trace with hash 366670195, now seen corresponding path program 1 times [2020-10-11 16:46:48,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:46:48,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253700036] [2020-10-11 16:46:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:46:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:46:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:46:48,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253700036] [2020-10-11 16:46:48,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184211632] [2020-10-11 16:46:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:46:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:46:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 16:46:48,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:46:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 16:46:49,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:46:49,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2020-10-11 16:46:49,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67890171] [2020-10-11 16:46:49,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-11 16:46:49,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:46:49,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-11 16:46:49,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 16:47:02,000 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 144 [2020-10-11 16:47:02,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 158 transitions, 798 flow. Second operand 33 states. [2020-10-11 16:47:02,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:47:02,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 144 [2020-10-11 16:47:02,003 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:47:24,181 INFO L129 PetriNetUnfolder]: 11471/87810 cut-off events. [2020-10-11 16:47:24,181 INFO L130 PetriNetUnfolder]: For 49180/49180 co-relation queries the response was YES. [2020-10-11 16:47:26,143 INFO L80 FinitePrefix]: Finished finitePrefix Result has 165542 conditions, 87810 events. 11471/87810 cut-off events. For 49180/49180 co-relation queries the response was YES. Maximal size of possible extension queue 1377. Compared 1398266 event pairs, 7673 based on Foata normal form. 1/87811 useless extension candidates. Maximal degree in co-relation 165501. Up to 14417 conditions per place. [2020-10-11 16:47:26,395 INFO L132 encePairwiseOnDemand]: 136/144 looper letters, 15 selfloop transitions, 26 changer transitions 0/162 dead transitions. [2020-10-11 16:47:26,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 162 transitions, 938 flow [2020-10-11 16:47:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 16:47:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-11 16:47:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3139 transitions. [2020-10-11 16:47:26,400 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8719444444444444 [2020-10-11 16:47:26,400 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3139 transitions. [2020-10-11 16:47:26,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3139 transitions. [2020-10-11 16:47:26,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:47:26,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3139 transitions. [2020-10-11 16:47:26,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-11 16:47:26,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-11 16:47:26,418 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-11 16:47:26,419 INFO L185 Difference]: Start difference. First operand has 213 places, 158 transitions, 798 flow. Second operand 25 states and 3139 transitions. [2020-10-11 16:47:26,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 162 transitions, 938 flow [2020-10-11 16:47:34,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 162 transitions, 866 flow, removed 16 selfloop flow, removed 18 redundant places. [2020-10-11 16:47:34,686 INFO L241 Difference]: Finished difference. Result has 222 places, 161 transitions, 836 flow [2020-10-11 16:47:34,687 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=836, PETRI_PLACES=222, PETRI_TRANSITIONS=161} [2020-10-11 16:47:34,687 INFO L341 CegarLoopForPetriNet]: 143 programPoint places, 79 predicate places. [2020-10-11 16:47:34,687 INFO L481 AbstractCegarLoop]: Abstraction has has 222 places, 161 transitions, 836 flow [2020-10-11 16:47:34,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-11 16:47:34,687 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:47:34,688 INFO L255 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:47:34,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:47:34,894 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:47:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:47:34,895 INFO L82 PathProgramCache]: Analyzing trace with hash -2000811053, now seen corresponding path program 1 times [2020-10-11 16:47:34,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:47:34,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141615585] [2020-10-11 16:47:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:47:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:47:34,924 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:47:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 16:47:34,960 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 16:47:34,986 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 16:47:34,986 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 16:47:34,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-11 16:47:34,986 WARN L371 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-11 16:47:34,987 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2020-10-11 16:47:34,999 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of12ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,000 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of12ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,000 WARN L313 ript$VariableManager]: TermVariabe threadThread5of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,000 WARN L313 ript$VariableManager]: TermVariabe threadThread5of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,000 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,001 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,001 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of12ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,001 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of12ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,001 WARN L313 ript$VariableManager]: TermVariabe threadThread7of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,001 WARN L313 ript$VariableManager]: TermVariabe threadThread7of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,001 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,002 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,002 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of12ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,002 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of12ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,002 WARN L313 ript$VariableManager]: TermVariabe threadThread10of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,002 WARN L313 ript$VariableManager]: TermVariabe threadThread10of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,002 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,002 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,003 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of12ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,003 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of12ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,003 WARN L313 ript$VariableManager]: TermVariabe threadThread4of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,003 WARN L313 ript$VariableManager]: TermVariabe threadThread4of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,003 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,003 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,003 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of12ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,004 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of12ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,004 WARN L313 ript$VariableManager]: TermVariabe threadThread8of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,004 WARN L313 ript$VariableManager]: TermVariabe threadThread8of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,004 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,004 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,004 WARN L313 ript$VariableManager]: TermVariabe |threadThread11of12ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,004 WARN L313 ript$VariableManager]: TermVariabe |threadThread11of12ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,005 WARN L313 ript$VariableManager]: TermVariabe threadThread11of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,005 WARN L313 ript$VariableManager]: TermVariabe threadThread11of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,005 WARN L313 ript$VariableManager]: TermVariabe |threadThread11of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,005 WARN L313 ript$VariableManager]: TermVariabe |threadThread11of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,005 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of12ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,005 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of12ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,005 WARN L313 ript$VariableManager]: TermVariabe threadThread1of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,005 WARN L313 ript$VariableManager]: TermVariabe threadThread1of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,006 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,006 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,006 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of12ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,006 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of12ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,006 WARN L313 ript$VariableManager]: TermVariabe threadThread3of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,006 WARN L313 ript$VariableManager]: TermVariabe threadThread3of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,006 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,006 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,007 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of12ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,007 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of12ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,007 WARN L313 ript$VariableManager]: TermVariabe threadThread9of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,007 WARN L313 ript$VariableManager]: TermVariabe threadThread9of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,007 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,007 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,007 WARN L313 ript$VariableManager]: TermVariabe |threadThread12of12ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,008 WARN L313 ript$VariableManager]: TermVariabe |threadThread12of12ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,008 WARN L313 ript$VariableManager]: TermVariabe threadThread12of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,008 WARN L313 ript$VariableManager]: TermVariabe threadThread12of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,008 WARN L313 ript$VariableManager]: TermVariabe |threadThread12of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,008 WARN L313 ript$VariableManager]: TermVariabe |threadThread12of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,008 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of12ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,009 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of12ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,009 WARN L313 ript$VariableManager]: TermVariabe threadThread2of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,009 WARN L313 ript$VariableManager]: TermVariabe threadThread2of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,009 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,009 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,009 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of12ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,009 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of12ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,009 WARN L313 ript$VariableManager]: TermVariabe threadThread6of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,010 WARN L313 ript$VariableManager]: TermVariabe threadThread6of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,010 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,010 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,010 WARN L313 ript$VariableManager]: TermVariabe threadThread1of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,011 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,011 WARN L313 ript$VariableManager]: TermVariabe threadThread1of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,011 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,015 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,015 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,015 WARN L313 ript$VariableManager]: TermVariabe threadThread2of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,015 WARN L313 ript$VariableManager]: TermVariabe threadThread2of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,020 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,020 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,020 WARN L313 ript$VariableManager]: TermVariabe threadThread3of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,020 WARN L313 ript$VariableManager]: TermVariabe threadThread3of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,022 WARN L313 ript$VariableManager]: TermVariabe threadThread4of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,022 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,022 WARN L313 ript$VariableManager]: TermVariabe threadThread4of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,022 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,024 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,024 WARN L313 ript$VariableManager]: TermVariabe threadThread5of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,024 WARN L313 ript$VariableManager]: TermVariabe threadThread5of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,024 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,025 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,026 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,026 WARN L313 ript$VariableManager]: TermVariabe threadThread6of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,026 WARN L313 ript$VariableManager]: TermVariabe threadThread6of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,028 WARN L313 ript$VariableManager]: TermVariabe threadThread7of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,028 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,028 WARN L313 ript$VariableManager]: TermVariabe threadThread7of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,028 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,030 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,031 WARN L313 ript$VariableManager]: TermVariabe threadThread8of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,031 WARN L313 ript$VariableManager]: TermVariabe threadThread8of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,031 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,033 WARN L313 ript$VariableManager]: TermVariabe threadThread9of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,033 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,033 WARN L313 ript$VariableManager]: TermVariabe threadThread9of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,033 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,035 WARN L313 ript$VariableManager]: TermVariabe threadThread10of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,035 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,035 WARN L313 ript$VariableManager]: TermVariabe threadThread10of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,035 WARN L313 ript$VariableManager]: TermVariabe |threadThread10of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,037 WARN L313 ript$VariableManager]: TermVariabe |threadThread11of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,038 WARN L313 ript$VariableManager]: TermVariabe threadThread11of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,038 WARN L313 ript$VariableManager]: TermVariabe threadThread11of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,038 WARN L313 ript$VariableManager]: TermVariabe |threadThread11of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,039 WARN L313 ript$VariableManager]: TermVariabe threadThread12of12ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,039 WARN L313 ript$VariableManager]: TermVariabe |threadThread12of12ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,040 WARN L313 ript$VariableManager]: TermVariabe threadThread12of12ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,040 WARN L313 ript$VariableManager]: TermVariabe |threadThread12of12ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:47:35,053 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-11 16:47:35,054 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:47:35,054 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:47:35,054 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:47:35,054 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:47:35,054 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:47:35,054 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:47:35,054 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:47:35,055 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:47:35,056 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 156 places, 150 transitions, 528 flow [2020-10-11 16:48:20,275 INFO L129 PetriNetUnfolder]: 36892/160007 cut-off events. [2020-10-11 16:48:20,275 INFO L130 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2020-10-11 16:48:21,516 INFO L80 FinitePrefix]: Finished finitePrefix Result has 184698 conditions, 160007 events. 36892/160007 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2681. Compared 2417889 event pairs, 16398 based on Foata normal form. 0/135403 useless extension candidates. Maximal degree in co-relation 90432. Up to 24576 conditions per place. [2020-10-11 16:48:21,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 150 transitions, 528 flow [2020-10-11 16:48:21,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 143 transitions, 514 flow [2020-10-11 16:48:21,884 INFO L129 PetriNetUnfolder]: 6/68 cut-off events. [2020-10-11 16:48:21,884 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:48:21,884 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:48:21,884 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:48:21,884 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:48:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:48:21,885 INFO L82 PathProgramCache]: Analyzing trace with hash 431492565, now seen corresponding path program 1 times [2020-10-11 16:48:21,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:48:21,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113485905] [2020-10-11 16:48:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:48:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:48:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:48:21,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113485905] [2020-10-11 16:48:21,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:48:21,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 16:48:21,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030873264] [2020-10-11 16:48:21,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 16:48:21,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:48:21,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 16:48:21,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 16:48:21,896 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 150 [2020-10-11 16:48:21,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 143 transitions, 514 flow. Second operand 2 states. [2020-10-11 16:48:21,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:48:21,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 150 [2020-10-11 16:48:21,897 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:48:51,818 INFO L129 PetriNetUnfolder]: 24589/123128 cut-off events. [2020-10-11 16:48:51,818 INFO L130 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2020-10-11 16:48:52,712 INFO L80 FinitePrefix]: Finished finitePrefix Result has 147820 conditions, 123128 events. 24589/123128 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2107. Compared 1857751 event pairs, 16398 based on Foata normal form. 8207/123128 useless extension candidates. Maximal degree in co-relation 147806. Up to 24576 conditions per place. [2020-10-11 16:48:52,982 INFO L132 encePairwiseOnDemand]: 145/150 looper letters, 0 selfloop transitions, 0 changer transitions 2/138 dead transitions. [2020-10-11 16:48:52,982 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 138 transitions, 504 flow [2020-10-11 16:48:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 16:48:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 16:48:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 293 transitions. [2020-10-11 16:48:52,983 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9766666666666667 [2020-10-11 16:48:52,983 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 293 transitions. [2020-10-11 16:48:52,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 293 transitions. [2020-10-11 16:48:52,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:48:52,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 293 transitions. [2020-10-11 16:48:52,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 16:48:52,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 16:48:52,984 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 16:48:52,984 INFO L185 Difference]: Start difference. First operand has 150 places, 143 transitions, 514 flow. Second operand 2 states and 293 transitions. [2020-10-11 16:48:52,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 138 transitions, 504 flow [2020-10-11 16:48:52,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 138 transitions, 504 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:48:52,993 INFO L241 Difference]: Finished difference. Result has 151 places, 136 transitions, 500 flow [2020-10-11 16:48:52,993 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=500, PETRI_PLACES=151, PETRI_TRANSITIONS=136} [2020-10-11 16:48:52,993 INFO L341 CegarLoopForPetriNet]: 150 programPoint places, 1 predicate places. [2020-10-11 16:48:52,993 INFO L481 AbstractCegarLoop]: Abstraction has has 151 places, 136 transitions, 500 flow [2020-10-11 16:48:52,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 16:48:52,993 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:48:52,993 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:48:52,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-11 16:48:52,993 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:48:52,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:48:52,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1150683190, now seen corresponding path program 1 times [2020-10-11 16:48:52,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:48:52,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842080034] [2020-10-11 16:48:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:48:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:48:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:48:53,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842080034] [2020-10-11 16:48:53,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:48:53,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 16:48:53,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890477097] [2020-10-11 16:48:53,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 16:48:53,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:48:53,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 16:48:53,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 16:48:53,260 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 150 [2020-10-11 16:48:53,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 136 transitions, 500 flow. Second operand 4 states. [2020-10-11 16:48:53,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:48:53,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 150 [2020-10-11 16:48:53,261 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:49:25,826 INFO L129 PetriNetUnfolder]: 24642/123471 cut-off events. [2020-10-11 16:49:25,826 INFO L130 PetriNetUnfolder]: For 24994/24994 co-relation queries the response was YES. [2020-10-11 16:49:27,097 INFO L80 FinitePrefix]: Finished finitePrefix Result has 168811 conditions, 123471 events. 24642/123471 cut-off events. For 24994/24994 co-relation queries the response was YES. Maximal size of possible extension queue 2057. Compared 1870151 event pairs, 16464 based on Foata normal form. 13/123484 useless extension candidates. Maximal degree in co-relation 168796. Up to 24642 conditions per place. [2020-10-11 16:49:27,396 INFO L132 encePairwiseOnDemand]: 143/150 looper letters, 9 selfloop transitions, 5 changer transitions 0/138 dead transitions. [2020-10-11 16:49:27,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 138 transitions, 532 flow [2020-10-11 16:49:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 16:49:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 16:49:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 544 transitions. [2020-10-11 16:49:27,398 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9066666666666666 [2020-10-11 16:49:27,398 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 544 transitions. [2020-10-11 16:49:27,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 544 transitions. [2020-10-11 16:49:27,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:49:27,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 544 transitions. [2020-10-11 16:49:27,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 16:49:27,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 16:49:27,401 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 16:49:27,401 INFO L185 Difference]: Start difference. First operand has 151 places, 136 transitions, 500 flow. Second operand 4 states and 544 transitions. [2020-10-11 16:49:27,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 138 transitions, 532 flow [2020-10-11 16:49:27,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 138 transitions, 532 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 16:49:27,414 INFO L241 Difference]: Finished difference. Result has 153 places, 138 transitions, 526 flow [2020-10-11 16:49:27,415 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=526, PETRI_PLACES=153, PETRI_TRANSITIONS=138} [2020-10-11 16:49:27,415 INFO L341 CegarLoopForPetriNet]: 150 programPoint places, 3 predicate places. [2020-10-11 16:49:27,415 INFO L481 AbstractCegarLoop]: Abstraction has has 153 places, 138 transitions, 526 flow [2020-10-11 16:49:27,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 16:49:27,415 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:49:27,415 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:49:27,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-11 16:49:27,415 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:49:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:49:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1048773478, now seen corresponding path program 1 times [2020-10-11 16:49:27,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:49:27,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787070321] [2020-10-11 16:49:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:49:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:49:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:49:27,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787070321] [2020-10-11 16:49:27,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:49:27,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-11 16:49:27,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592853856] [2020-10-11 16:49:27,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 16:49:27,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:49:27,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 16:49:27,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 16:49:28,032 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 150 [2020-10-11 16:49:28,033 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 138 transitions, 526 flow. Second operand 5 states. [2020-10-11 16:49:28,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:49:28,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 150 [2020-10-11 16:49:28,034 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:50:09,793 INFO L129 PetriNetUnfolder]: 24642/148041 cut-off events. [2020-10-11 16:50:09,794 INFO L130 PetriNetUnfolder]: For 33278/33278 co-relation queries the response was YES. [2020-10-11 16:50:11,346 INFO L80 FinitePrefix]: Finished finitePrefix Result has 218137 conditions, 148041 events. 24642/148041 cut-off events. For 33278/33278 co-relation queries the response was YES. Maximal size of possible extension queue 2729. Compared 2402504 event pairs, 16464 based on Foata normal form. 4095/152136 useless extension candidates. Maximal degree in co-relation 218120. Up to 24664 conditions per place. [2020-10-11 16:50:11,671 INFO L132 encePairwiseOnDemand]: 140/150 looper letters, 10 selfloop transitions, 9 changer transitions 0/140 dead transitions. [2020-10-11 16:50:11,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 140 transitions, 568 flow [2020-10-11 16:50:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 16:50:11,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 16:50:11,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 794 transitions. [2020-10-11 16:50:11,673 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8822222222222222 [2020-10-11 16:50:11,673 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 794 transitions. [2020-10-11 16:50:11,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 794 transitions. [2020-10-11 16:50:11,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:50:11,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 794 transitions. [2020-10-11 16:50:11,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 16:50:11,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 16:50:11,675 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 16:50:11,675 INFO L185 Difference]: Start difference. First operand has 153 places, 138 transitions, 526 flow. Second operand 6 states and 794 transitions. [2020-10-11 16:50:11,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 140 transitions, 568 flow [2020-10-11 16:50:11,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 140 transitions, 562 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:50:11,691 INFO L241 Difference]: Finished difference. Result has 158 places, 140 transitions, 556 flow [2020-10-11 16:50:11,692 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=556, PETRI_PLACES=158, PETRI_TRANSITIONS=140} [2020-10-11 16:50:11,692 INFO L341 CegarLoopForPetriNet]: 150 programPoint places, 8 predicate places. [2020-10-11 16:50:11,692 INFO L481 AbstractCegarLoop]: Abstraction has has 158 places, 140 transitions, 556 flow [2020-10-11 16:50:11,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 16:50:11,692 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:50:11,692 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:50:11,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-11 16:50:11,692 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:50:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:50:11,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1183459269, now seen corresponding path program 1 times [2020-10-11 16:50:11,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:50:11,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347117714] [2020-10-11 16:50:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:50:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:50:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:50:11,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347117714] [2020-10-11 16:50:11,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624391114] [2020-10-11 16:50:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:50:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:50:11,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-11 16:50:11,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:50:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:50:11,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:50:11,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-10-11 16:50:11,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135399996] [2020-10-11 16:50:11,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:50:11,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:50:11,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:50:11,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:50:13,078 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 150 [2020-10-11 16:50:13,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 140 transitions, 556 flow. Second operand 9 states. [2020-10-11 16:50:13,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:50:13,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 150 [2020-10-11 16:50:13,080 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:50:57,261 INFO L129 PetriNetUnfolder]: 24641/148031 cut-off events. [2020-10-11 16:50:57,261 INFO L130 PetriNetUnfolder]: For 53896/53896 co-relation queries the response was YES. [2020-10-11 16:50:59,443 INFO L80 FinitePrefix]: Finished finitePrefix Result has 242804 conditions, 148031 events. 24641/148031 cut-off events. For 53896/53896 co-relation queries the response was YES. Maximal size of possible extension queue 2729. Compared 2402574 event pairs, 16464 based on Foata normal form. 1/148032 useless extension candidates. Maximal degree in co-relation 242785. Up to 24681 conditions per place. [2020-10-11 16:50:59,787 INFO L132 encePairwiseOnDemand]: 142/150 looper letters, 13 selfloop transitions, 8 changer transitions 0/144 dead transitions. [2020-10-11 16:50:59,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 144 transitions, 608 flow [2020-10-11 16:50:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 16:50:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-11 16:50:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 931 transitions. [2020-10-11 16:50:59,789 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8866666666666667 [2020-10-11 16:50:59,789 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 931 transitions. [2020-10-11 16:50:59,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 931 transitions. [2020-10-11 16:50:59,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:50:59,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 931 transitions. [2020-10-11 16:50:59,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-11 16:50:59,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-11 16:50:59,792 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-11 16:50:59,792 INFO L185 Difference]: Start difference. First operand has 158 places, 140 transitions, 556 flow. Second operand 7 states and 931 transitions. [2020-10-11 16:50:59,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 144 transitions, 608 flow [2020-10-11 16:51:05,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 144 transitions, 598 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-11 16:51:05,783 INFO L241 Difference]: Finished difference. Result has 164 places, 143 transitions, 586 flow [2020-10-11 16:51:05,783 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=586, PETRI_PLACES=164, PETRI_TRANSITIONS=143} [2020-10-11 16:51:05,783 INFO L341 CegarLoopForPetriNet]: 150 programPoint places, 14 predicate places. [2020-10-11 16:51:05,783 INFO L481 AbstractCegarLoop]: Abstraction has has 164 places, 143 transitions, 586 flow [2020-10-11 16:51:05,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:51:05,784 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:51:05,784 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:51:05,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:51:05,985 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:51:05,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:51:05,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1003807547, now seen corresponding path program 1 times [2020-10-11 16:51:05,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:51:05,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427841512] [2020-10-11 16:51:05,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:51:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:51:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-11 16:51:06,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427841512] [2020-10-11 16:51:06,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871671542] [2020-10-11 16:51:06,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:51:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:51:06,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 16:51:06,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:51:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-11 16:51:06,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:51:06,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-10-11 16:51:06,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604060668] [2020-10-11 16:51:06,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:51:06,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:51:06,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:51:06,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:51:07,934 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 150 [2020-10-11 16:51:07,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 143 transitions, 586 flow. Second operand 11 states. [2020-10-11 16:51:07,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:51:07,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 150 [2020-10-11 16:51:07,936 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2020-10-11 16:51:25,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 16:51:25,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-11 16:51:25,435 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-11 16:51:25,441 WARN L235 ceAbstractionStarter]: Timeout [2020-10-11 16:51:25,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 04:51:25 BasicIcfg [2020-10-11 16:51:25,442 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 16:51:25,444 INFO L168 Benchmark]: Toolchain (without parser) took 726805.06 ms. Allocated memory was 251.7 MB in the beginning and 6.6 GB in the end (delta: 6.3 GB). Free memory was 206.6 MB in the beginning and 2.2 GB in the end (delta: -2.0 GB). Peak memory consumption was 4.5 GB. Max. memory is 14.2 GB. [2020-10-11 16:51:25,444 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 16:51:25,445 INFO L168 Benchmark]: CACSL2BoogieTranslator took 847.73 ms. Allocated memory was 251.7 MB in the beginning and 315.1 MB in the end (delta: 63.4 MB). Free memory was 206.6 MB in the beginning and 227.7 MB in the end (delta: -21.2 MB). Peak memory consumption was 52.6 MB. Max. memory is 14.2 GB. [2020-10-11 16:51:25,445 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.09 ms. Allocated memory is still 315.1 MB. Free memory was 227.7 MB in the beginning and 225.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 16:51:25,445 INFO L168 Benchmark]: Boogie Preprocessor took 34.79 ms. Allocated memory is still 315.1 MB. Free memory is still 225.2 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 16:51:25,446 INFO L168 Benchmark]: RCFGBuilder took 485.17 ms. Allocated memory is still 315.1 MB. Free memory was 222.7 MB in the beginning and 198.4 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 14.2 GB. [2020-10-11 16:51:25,446 INFO L168 Benchmark]: TraceAbstraction took 725359.20 ms. Allocated memory was 315.1 MB in the beginning and 6.6 GB in the end (delta: 6.2 GB). Free memory was 198.4 MB in the beginning and 2.2 GB in the end (delta: -2.0 GB). Peak memory consumption was 4.4 GB. Max. memory is 14.2 GB. [2020-10-11 16:51:25,448 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 847.73 ms. Allocated memory was 251.7 MB in the beginning and 315.1 MB in the end (delta: 63.4 MB). Free memory was 206.6 MB in the beginning and 227.7 MB in the end (delta: -21.2 MB). Peak memory consumption was 52.6 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 72.09 ms. Allocated memory is still 315.1 MB. Free memory was 227.7 MB in the beginning and 225.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 34.79 ms. Allocated memory is still 315.1 MB. Free memory is still 225.2 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 485.17 ms. Allocated memory is still 315.1 MB. Free memory was 222.7 MB in the beginning and 198.4 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 14.2 GB. * TraceAbstraction took 725359.20 ms. Allocated memory was 315.1 MB in the beginning and 6.6 GB in the end (delta: 6.2 GB). Free memory was 198.4 MB in the beginning and 2.2 GB in the end (delta: -2.0 GB). Peak memory consumption was 4.4 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1092]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1092). Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (11states, 128/150 universal loopers) in iteration 5,while PetriNetUnfolder was constructing finite prefix that currently has 129699 conditions, 77444 events (13301/77443 cut-off events. For 25468/25468 co-relation queries the response was YES. Maximal size of possible extension queue 2322. Compared 1228719 event pairs, 9714 based on Foata normal form. 76/79484 useless extension candidates. Maximal degree in co-relation 129677. Up to 17786 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 76 locations, 1 error locations. Started 12 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 724.7s, OverallIterations: 77, TraceHistogramMax: 12, AutomataDifference: 632.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 71.1s, HoareTripleCheckerStatistics: 1386 SDtfs, 6733 SDslu, 3371 SDs, 0 SdLazy, 17269 SolverSat, 787 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3757 GetRequests, 3057 SyntacticMatches, 0 SemanticMatches, 700 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 8.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=836occurred in iteration=10, 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: 0.5s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 9001 NumberOfCodeBlocks, 9001 NumberOfCodeBlocksAsserted, 109 NumberOfCheckSat, 7748 ConstructedInterpolants, 0 QuantifiedInterpolants, 2476980 SizeOfPredicates, 244 NumberOfNonLiveVariables, 6902 ConjunctsInSsa, 276 ConjunctsInUnsatCore, 98 InterpolantComputations, 34 PerfectInterpolantSequences, 872/3830 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown