/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/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 16:53:09,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 16:53:09,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 16:53:09,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 16:53:09,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 16:53:09,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 16:53:09,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 16:53:09,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 16:53:09,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 16:53:09,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 16:53:09,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 16:53:09,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 16:53:09,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 16:53:09,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 16:53:09,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 16:53:09,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 16:53:09,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 16:53:09,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 16:53:09,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 16:53:09,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 16:53:09,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 16:53:09,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 16:53:09,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 16:53:09,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 16:53:09,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 16:53:09,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 16:53:09,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 16:53:09,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 16:53:09,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 16:53:09,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 16:53:09,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 16:53:09,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 16:53:09,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 16:53:09,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 16:53:09,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 16:53:09,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 16:53:09,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 16:53:09,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 16:53:09,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 16:53:09,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 16:53:09,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 16:53:09,505 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 16:53:09,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 16:53:09,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 16:53:09,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 16:53:09,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 16:53:09,530 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 16:53:09,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 16:53:09,531 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 16:53:09,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 16:53:09,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 16:53:09,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 16:53:09,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 16:53:09,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 16:53:09,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 16:53:09,532 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 16:53:09,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 16:53:09,532 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 16:53:09,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 16:53:09,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 16:53:09,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 16:53:09,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 16:53:09,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 16:53:09,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 16:53:09,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 16:53:09,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 16:53:09,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 16:53:09,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 16:53:09,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 16:53:09,535 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 16:53:09,535 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 16:53:09,535 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 16:53:09,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 16:53:09,866 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 16:53:09,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 16:53:09,873 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 16:53:09,875 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 16:53:09,876 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-10-11 16:53:09,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbb0aec3/698e6359e9f5403a9ef715ca3ca79c14/FLAG932caf0e5 [2020-10-11 16:53:10,463 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 16:53:10,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-10-11 16:53:10,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbb0aec3/698e6359e9f5403a9ef715ca3ca79c14/FLAG932caf0e5 [2020-10-11 16:53:10,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbb0aec3/698e6359e9f5403a9ef715ca3ca79c14 [2020-10-11 16:53:10,704 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 16:53:10,707 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 16:53:10,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 16:53:10,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 16:53:10,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 16:53:10,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 04:53:10" (1/1) ... [2020-10-11 16:53:10,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63bfdf86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:10, skipping insertion in model container [2020-10-11 16:53:10,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 04:53:10" (1/1) ... [2020-10-11 16:53:10,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 16:53:10,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 16:53:11,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 16:53:11,280 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 16:53:11,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 16:53:11,441 INFO L208 MainTranslator]: Completed translation [2020-10-11 16:53:11,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:11 WrapperNode [2020-10-11 16:53:11,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 16:53:11,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 16:53:11,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 16:53:11,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 16:53:11,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:11" (1/1) ... [2020-10-11 16:53:11,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:11" (1/1) ... [2020-10-11 16:53:11,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 16:53:11,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 16:53:11,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 16:53:11,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 16:53:11,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:11" (1/1) ... [2020-10-11 16:53:11,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:11" (1/1) ... [2020-10-11 16:53:11,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:11" (1/1) ... [2020-10-11 16:53:11,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:11" (1/1) ... [2020-10-11 16:53:11,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:11" (1/1) ... [2020-10-11 16:53:11,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:11" (1/1) ... [2020-10-11 16:53:11,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:11" (1/1) ... [2020-10-11 16:53:11,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 16:53:11,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 16:53:11,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 16:53:11,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 16:53:11,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:11" (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 16:53:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-11 16:53:11,586 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-11 16:53:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-11 16:53:11,586 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-11 16:53:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 16:53:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-11 16:53:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 16:53:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 16:53:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-11 16:53:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 16:53:11,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 16:53:11,590 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 16:53:11,918 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 16:53:11,919 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 16:53:11,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 04:53:11 BoogieIcfgContainer [2020-10-11 16:53:11,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 16:53:11,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 16:53:11,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 16:53:11,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 16:53:11,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 04:53:10" (1/3) ... [2020-10-11 16:53:11,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cbcd9ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 04:53:11, skipping insertion in model container [2020-10-11 16:53:11,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:11" (2/3) ... [2020-10-11 16:53:11,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cbcd9ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 04:53:11, skipping insertion in model container [2020-10-11 16:53:11,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 04:53:11" (3/3) ... [2020-10-11 16:53:11,930 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-10-11 16:53:11,941 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 16:53:11,947 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 16:53:11,948 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 16:53:11,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,977 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,978 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,979 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,979 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,979 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,979 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,980 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,983 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,983 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,984 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,984 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,984 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,985 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,988 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,988 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,989 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,989 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,989 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,990 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,990 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,990 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,990 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,992 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,992 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,993 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:11,993 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:12,001 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:12,001 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:12,002 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:12,002 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:12,003 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:12,004 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:12,014 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:12,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:12,014 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:12,015 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:12,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:12,015 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:12,040 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 16:53:12,062 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:53:12,064 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:53:12,064 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:53:12,064 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:53:12,066 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:53:12,066 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:53:12,066 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:53:12,067 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:53:12,083 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-11 16:53:12,116 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-11 16:53:12,117 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:53:12,122 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-11 16:53:12,123 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 120 flow [2020-10-11 16:53:12,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 53 transitions, 112 flow [2020-10-11 16:53:12,145 INFO L129 PetriNetUnfolder]: 4/43 cut-off events. [2020-10-11 16:53:12,145 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:53:12,145 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:12,147 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:12,147 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:12,153 INFO L82 PathProgramCache]: Analyzing trace with hash 305903693, now seen corresponding path program 1 times [2020-10-11 16:53:12,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:12,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055361574] [2020-10-11 16:53:12,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:12,549 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 16:53:12,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055361574] [2020-10-11 16:53:12,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:53:12,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-11 16:53:12,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546425281] [2020-10-11 16:53:12,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 16:53:12,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:12,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 16:53:12,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 16:53:12,636 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:12,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 112 flow. Second operand 6 states. [2020-10-11 16:53:12,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:12,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:12,641 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:12,817 INFO L129 PetriNetUnfolder]: 39/210 cut-off events. [2020-10-11 16:53:12,818 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:53:12,821 INFO L80 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 210 events. 39/210 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1001 event pairs, 0 based on Foata normal form. 40/226 useless extension candidates. Maximal degree in co-relation 261. Up to 26 conditions per place. [2020-10-11 16:53:12,824 INFO L132 encePairwiseOnDemand]: 44/55 looper letters, 16 selfloop transitions, 9 changer transitions 5/71 dead transitions. [2020-10-11 16:53:12,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 208 flow [2020-10-11 16:53:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 16:53:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-11 16:53:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 393 transitions. [2020-10-11 16:53:12,844 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8931818181818182 [2020-10-11 16:53:12,845 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 393 transitions. [2020-10-11 16:53:12,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 393 transitions. [2020-10-11 16:53:12,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:12,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 393 transitions. [2020-10-11 16:53:12,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-11 16:53:12,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-11 16:53:12,865 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-11 16:53:12,868 INFO L185 Difference]: Start difference. First operand has 55 places, 53 transitions, 112 flow. Second operand 8 states and 393 transitions. [2020-10-11 16:53:12,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 208 flow [2020-10-11 16:53:12,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:53:12,879 INFO L241 Difference]: Finished difference. Result has 67 places, 57 transitions, 178 flow [2020-10-11 16:53:12,882 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=178, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2020-10-11 16:53:12,883 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2020-10-11 16:53:12,884 INFO L481 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 178 flow [2020-10-11 16:53:12,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 16:53:12,884 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:12,884 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] [2020-10-11 16:53:12,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 16:53:12,885 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:12,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1106394582, now seen corresponding path program 1 times [2020-10-11 16:53:12,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:12,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278458276] [2020-10-11 16:53:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:13,128 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 16:53:13,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278458276] [2020-10-11 16:53:13,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:53:13,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-11 16:53:13,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124714181] [2020-10-11 16:53:13,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 16:53:13,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:13,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 16:53:13,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 16:53:13,272 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:13,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 178 flow. Second operand 6 states. [2020-10-11 16:53:13,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:13,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:13,273 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:13,391 INFO L129 PetriNetUnfolder]: 55/274 cut-off events. [2020-10-11 16:53:13,391 INFO L130 PetriNetUnfolder]: For 314/366 co-relation queries the response was YES. [2020-10-11 16:53:13,394 INFO L80 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 274 events. 55/274 cut-off events. For 314/366 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1363 event pairs, 0 based on Foata normal form. 11/261 useless extension candidates. Maximal degree in co-relation 549. Up to 42 conditions per place. [2020-10-11 16:53:13,396 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 19 selfloop transitions, 11 changer transitions 30/94 dead transitions. [2020-10-11 16:53:13,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 94 transitions, 520 flow [2020-10-11 16:53:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 16:53:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-11 16:53:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 468 transitions. [2020-10-11 16:53:13,400 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.850909090909091 [2020-10-11 16:53:13,400 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 468 transitions. [2020-10-11 16:53:13,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 468 transitions. [2020-10-11 16:53:13,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:13,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 468 transitions. [2020-10-11 16:53:13,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-11 16:53:13,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-11 16:53:13,405 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-11 16:53:13,405 INFO L185 Difference]: Start difference. First operand has 67 places, 57 transitions, 178 flow. Second operand 10 states and 468 transitions. [2020-10-11 16:53:13,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 94 transitions, 520 flow [2020-10-11 16:53:13,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 506 flow, removed 4 selfloop flow, removed 2 redundant places. [2020-10-11 16:53:13,414 INFO L241 Difference]: Finished difference. Result has 81 places, 56 transitions, 265 flow [2020-10-11 16:53:13,414 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=265, PETRI_PLACES=81, PETRI_TRANSITIONS=56} [2020-10-11 16:53:13,415 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2020-10-11 16:53:13,415 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 56 transitions, 265 flow [2020-10-11 16:53:13,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 16:53:13,415 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:13,416 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:13,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 16:53:13,418 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1083307030, now seen corresponding path program 2 times [2020-10-11 16:53:13,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:13,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008922230] [2020-10-11 16:53:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:13,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008922230] [2020-10-11 16:53:13,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:53:13,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-11 16:53:13,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959780916] [2020-10-11 16:53:13,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 16:53:13,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:13,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 16:53:13,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-11 16:53:13,743 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:13,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 56 transitions, 265 flow. Second operand 6 states. [2020-10-11 16:53:13,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:13,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:13,744 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:13,863 INFO L129 PetriNetUnfolder]: 35/173 cut-off events. [2020-10-11 16:53:13,863 INFO L130 PetriNetUnfolder]: For 849/916 co-relation queries the response was YES. [2020-10-11 16:53:13,865 INFO L80 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 173 events. 35/173 cut-off events. For 849/916 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 628 event pairs, 0 based on Foata normal form. 25/180 useless extension candidates. Maximal degree in co-relation 477. Up to 35 conditions per place. [2020-10-11 16:53:13,866 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 16 selfloop transitions, 12 changer transitions 11/73 dead transitions. [2020-10-11 16:53:13,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 73 transitions, 545 flow [2020-10-11 16:53:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 16:53:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-11 16:53:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 413 transitions. [2020-10-11 16:53:13,869 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8343434343434344 [2020-10-11 16:53:13,869 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 413 transitions. [2020-10-11 16:53:13,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 413 transitions. [2020-10-11 16:53:13,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:13,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 413 transitions. [2020-10-11 16:53:13,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-11 16:53:13,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-11 16:53:13,873 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-11 16:53:13,873 INFO L185 Difference]: Start difference. First operand has 81 places, 56 transitions, 265 flow. Second operand 9 states and 413 transitions. [2020-10-11 16:53:13,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 73 transitions, 545 flow [2020-10-11 16:53:13,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 472 flow, removed 33 selfloop flow, removed 5 redundant places. [2020-10-11 16:53:13,880 INFO L241 Difference]: Finished difference. Result has 75 places, 58 transitions, 305 flow [2020-10-11 16:53:13,881 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=305, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2020-10-11 16:53:13,881 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2020-10-11 16:53:13,881 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 305 flow [2020-10-11 16:53:13,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 16:53:13,881 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:13,882 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] [2020-10-11 16:53:13,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 16:53:13,882 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:13,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:13,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2052585901, now seen corresponding path program 1 times [2020-10-11 16:53:13,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:13,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108493698] [2020-10-11 16:53:13,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:13,977 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 16:53:13,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108493698] [2020-10-11 16:53:13,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:53:13,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-11 16:53:13,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509080862] [2020-10-11 16:53:13,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 16:53:13,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:13,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 16:53:13,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-11 16:53:14,029 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:14,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 305 flow. Second operand 7 states. [2020-10-11 16:53:14,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:14,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:14,030 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:14,167 INFO L129 PetriNetUnfolder]: 41/204 cut-off events. [2020-10-11 16:53:14,168 INFO L130 PetriNetUnfolder]: For 914/977 co-relation queries the response was YES. [2020-10-11 16:53:14,169 INFO L80 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 204 events. 41/204 cut-off events. For 914/977 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 755 event pairs, 0 based on Foata normal form. 18/200 useless extension candidates. Maximal degree in co-relation 574. Up to 41 conditions per place. [2020-10-11 16:53:14,171 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 18 selfloop transitions, 20 changer transitions 8/80 dead transitions. [2020-10-11 16:53:14,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 655 flow [2020-10-11 16:53:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 16:53:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-11 16:53:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 510 transitions. [2020-10-11 16:53:14,175 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8429752066115702 [2020-10-11 16:53:14,175 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 510 transitions. [2020-10-11 16:53:14,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 510 transitions. [2020-10-11 16:53:14,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:14,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 510 transitions. [2020-10-11 16:53:14,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-11 16:53:14,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-11 16:53:14,179 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-11 16:53:14,179 INFO L185 Difference]: Start difference. First operand has 75 places, 58 transitions, 305 flow. Second operand 11 states and 510 transitions. [2020-10-11 16:53:14,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 655 flow [2020-10-11 16:53:14,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 80 transitions, 558 flow, removed 38 selfloop flow, removed 8 redundant places. [2020-10-11 16:53:14,187 INFO L241 Difference]: Finished difference. Result has 81 places, 63 transitions, 390 flow [2020-10-11 16:53:14,188 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=390, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2020-10-11 16:53:14,188 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2020-10-11 16:53:14,188 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 390 flow [2020-10-11 16:53:14,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 16:53:14,188 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:14,189 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] [2020-10-11 16:53:14,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 16:53:14,189 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:14,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:14,189 INFO L82 PathProgramCache]: Analyzing trace with hash -13306963, now seen corresponding path program 2 times [2020-10-11 16:53:14,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:14,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947682433] [2020-10-11 16:53:14,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:14,339 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 16:53:14,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947682433] [2020-10-11 16:53:14,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:53:14,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-11 16:53:14,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526070519] [2020-10-11 16:53:14,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 16:53:14,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:14,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 16:53:14,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-11 16:53:14,508 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:14,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 390 flow. Second operand 7 states. [2020-10-11 16:53:14,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:14,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:14,509 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:14,672 INFO L129 PetriNetUnfolder]: 34/193 cut-off events. [2020-10-11 16:53:14,672 INFO L130 PetriNetUnfolder]: For 989/1052 co-relation queries the response was YES. [2020-10-11 16:53:14,673 INFO L80 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 193 events. 34/193 cut-off events. For 989/1052 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 719 event pairs, 0 based on Foata normal form. 26/199 useless extension candidates. Maximal degree in co-relation 542. Up to 38 conditions per place. [2020-10-11 16:53:14,675 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 15 selfloop transitions, 20 changer transitions 11/80 dead transitions. [2020-10-11 16:53:14,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 80 transitions, 714 flow [2020-10-11 16:53:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 16:53:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-11 16:53:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 504 transitions. [2020-10-11 16:53:14,678 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8330578512396695 [2020-10-11 16:53:14,678 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 504 transitions. [2020-10-11 16:53:14,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 504 transitions. [2020-10-11 16:53:14,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:14,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 504 transitions. [2020-10-11 16:53:14,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-11 16:53:14,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-11 16:53:14,682 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-11 16:53:14,682 INFO L185 Difference]: Start difference. First operand has 81 places, 63 transitions, 390 flow. Second operand 11 states and 504 transitions. [2020-10-11 16:53:14,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 80 transitions, 714 flow [2020-10-11 16:53:14,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 642 flow, removed 20 selfloop flow, removed 7 redundant places. [2020-10-11 16:53:14,692 INFO L241 Difference]: Finished difference. Result has 86 places, 64 transitions, 431 flow [2020-10-11 16:53:14,692 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=431, PETRI_PLACES=86, PETRI_TRANSITIONS=64} [2020-10-11 16:53:14,693 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2020-10-11 16:53:14,693 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 64 transitions, 431 flow [2020-10-11 16:53:14,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 16:53:14,693 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:14,693 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] [2020-10-11 16:53:14,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-11 16:53:14,694 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:14,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:14,694 INFO L82 PathProgramCache]: Analyzing trace with hash -275006521, now seen corresponding path program 3 times [2020-10-11 16:53:14,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:14,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814190694] [2020-10-11 16:53:14,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:14,826 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 16:53:14,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814190694] [2020-10-11 16:53:14,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:53:14,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-11 16:53:14,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689366033] [2020-10-11 16:53:14,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 16:53:14,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:14,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 16:53:14,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-11 16:53:14,900 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:14,901 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 64 transitions, 431 flow. Second operand 7 states. [2020-10-11 16:53:14,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:14,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:14,901 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:15,096 INFO L129 PetriNetUnfolder]: 33/177 cut-off events. [2020-10-11 16:53:15,096 INFO L130 PetriNetUnfolder]: For 1019/1063 co-relation queries the response was YES. [2020-10-11 16:53:15,098 INFO L80 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 177 events. 33/177 cut-off events. For 1019/1063 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 692 event pairs, 0 based on Foata normal form. 25/185 useless extension candidates. Maximal degree in co-relation 535. Up to 38 conditions per place. [2020-10-11 16:53:15,099 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 22 selfloop transitions, 17 changer transitions 5/78 dead transitions. [2020-10-11 16:53:15,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 78 transitions, 722 flow [2020-10-11 16:53:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 16:53:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 16:53:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 548 transitions. [2020-10-11 16:53:15,103 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8303030303030303 [2020-10-11 16:53:15,103 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 548 transitions. [2020-10-11 16:53:15,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 548 transitions. [2020-10-11 16:53:15,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:15,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 548 transitions. [2020-10-11 16:53:15,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 16:53:15,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 16:53:15,107 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 16:53:15,107 INFO L185 Difference]: Start difference. First operand has 86 places, 64 transitions, 431 flow. Second operand 12 states and 548 transitions. [2020-10-11 16:53:15,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 78 transitions, 722 flow [2020-10-11 16:53:15,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 78 transitions, 621 flow, removed 29 selfloop flow, removed 10 redundant places. [2020-10-11 16:53:15,116 INFO L241 Difference]: Finished difference. Result has 89 places, 68 transitions, 470 flow [2020-10-11 16:53:15,117 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=470, PETRI_PLACES=89, PETRI_TRANSITIONS=68} [2020-10-11 16:53:15,117 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2020-10-11 16:53:15,117 INFO L481 AbstractCegarLoop]: Abstraction has has 89 places, 68 transitions, 470 flow [2020-10-11 16:53:15,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 16:53:15,117 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:15,118 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:15,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-11 16:53:15,118 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:15,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1717845803, now seen corresponding path program 1 times [2020-10-11 16:53:15,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:15,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96966901] [2020-10-11 16:53:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:15,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96966901] [2020-10-11 16:53:15,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895178055] [2020-10-11 16:53:15,271 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 16:53:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:15,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 16:53:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:15,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:15,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:15,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:15,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 16:53:15,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090518018] [2020-10-11 16:53:15,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:53:15,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:15,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:53:15,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:53:15,695 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:15,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 68 transitions, 470 flow. Second operand 9 states. [2020-10-11 16:53:15,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:15,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:15,696 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:15,844 INFO L129 PetriNetUnfolder]: 36/196 cut-off events. [2020-10-11 16:53:15,844 INFO L130 PetriNetUnfolder]: For 1186/1262 co-relation queries the response was YES. [2020-10-11 16:53:15,846 INFO L80 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 196 events. 36/196 cut-off events. For 1186/1262 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 775 event pairs, 0 based on Foata normal form. 30/207 useless extension candidates. Maximal degree in co-relation 593. Up to 42 conditions per place. [2020-10-11 16:53:15,848 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 16 selfloop transitions, 27 changer transitions 5/82 dead transitions. [2020-10-11 16:53:15,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 82 transitions, 782 flow [2020-10-11 16:53:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 16:53:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-11 16:53:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 503 transitions. [2020-10-11 16:53:15,851 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8314049586776859 [2020-10-11 16:53:15,851 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 503 transitions. [2020-10-11 16:53:15,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 503 transitions. [2020-10-11 16:53:15,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:15,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 503 transitions. [2020-10-11 16:53:15,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-11 16:53:15,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-11 16:53:15,855 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-11 16:53:15,855 INFO L185 Difference]: Start difference. First operand has 89 places, 68 transitions, 470 flow. Second operand 11 states and 503 transitions. [2020-10-11 16:53:15,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 82 transitions, 782 flow [2020-10-11 16:53:15,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 82 transitions, 722 flow, removed 23 selfloop flow, removed 5 redundant places. [2020-10-11 16:53:15,862 INFO L241 Difference]: Finished difference. Result has 96 places, 71 transitions, 558 flow [2020-10-11 16:53:15,862 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=558, PETRI_PLACES=96, PETRI_TRANSITIONS=71} [2020-10-11 16:53:15,863 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2020-10-11 16:53:15,863 INFO L481 AbstractCegarLoop]: Abstraction has has 96 places, 71 transitions, 558 flow [2020-10-11 16:53:15,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:53:15,863 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:15,863 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:16,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-11 16:53:16,077 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash 277746476, now seen corresponding path program 1 times [2020-10-11 16:53:16,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:16,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910195602] [2020-10-11 16:53:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:16,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910195602] [2020-10-11 16:53:16,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524478653] [2020-10-11 16:53:16,175 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 16:53:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:16,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 16:53:16,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:16,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:16,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:16,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 16:53:16,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060950344] [2020-10-11 16:53:16,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:53:16,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:16,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:53:16,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:53:16,400 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:16,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 71 transitions, 558 flow. Second operand 9 states. [2020-10-11 16:53:16,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:16,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:16,401 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:16,553 INFO L129 PetriNetUnfolder]: 40/224 cut-off events. [2020-10-11 16:53:16,553 INFO L130 PetriNetUnfolder]: For 1727/1808 co-relation queries the response was YES. [2020-10-11 16:53:16,555 INFO L80 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 224 events. 40/224 cut-off events. For 1727/1808 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 905 event pairs, 0 based on Foata normal form. 39/239 useless extension candidates. Maximal degree in co-relation 719. Up to 48 conditions per place. [2020-10-11 16:53:16,557 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 31 selfloop transitions, 13 changer transitions 8/86 dead transitions. [2020-10-11 16:53:16,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 86 transitions, 936 flow [2020-10-11 16:53:16,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 16:53:16,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-11 16:53:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 505 transitions. [2020-10-11 16:53:16,560 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8347107438016529 [2020-10-11 16:53:16,560 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 505 transitions. [2020-10-11 16:53:16,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 505 transitions. [2020-10-11 16:53:16,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:16,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 505 transitions. [2020-10-11 16:53:16,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-11 16:53:16,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-11 16:53:16,564 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-11 16:53:16,564 INFO L185 Difference]: Start difference. First operand has 96 places, 71 transitions, 558 flow. Second operand 11 states and 505 transitions. [2020-10-11 16:53:16,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 86 transitions, 936 flow [2020-10-11 16:53:16,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 86 transitions, 852 flow, removed 24 selfloop flow, removed 8 redundant places. [2020-10-11 16:53:16,576 INFO L241 Difference]: Finished difference. Result has 101 places, 73 transitions, 570 flow [2020-10-11 16:53:16,576 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=570, PETRI_PLACES=101, PETRI_TRANSITIONS=73} [2020-10-11 16:53:16,577 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2020-10-11 16:53:16,577 INFO L481 AbstractCegarLoop]: Abstraction has has 101 places, 73 transitions, 570 flow [2020-10-11 16:53:16,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:53:16,577 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:16,577 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:16,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:16,791 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:16,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:16,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1014709908, now seen corresponding path program 2 times [2020-10-11 16:53:16,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:16,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170062171] [2020-10-11 16:53:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:16,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170062171] [2020-10-11 16:53:16,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728590353] [2020-10-11 16:53:16,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 16:53:16,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:53:16,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:16,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 16:53:16,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:16,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:17,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:17,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:17,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-10-11 16:53:17,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792177516] [2020-10-11 16:53:17,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 16:53:17,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:17,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 16:53:17,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 16:53:17,179 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:17,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 73 transitions, 570 flow. Second operand 10 states. [2020-10-11 16:53:17,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:17,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:17,180 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:17,370 INFO L129 PetriNetUnfolder]: 43/251 cut-off events. [2020-10-11 16:53:17,371 INFO L130 PetriNetUnfolder]: For 2202/2285 co-relation queries the response was YES. [2020-10-11 16:53:17,373 INFO L80 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 251 events. 43/251 cut-off events. For 2202/2285 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1121 event pairs, 0 based on Foata normal form. 39/264 useless extension candidates. Maximal degree in co-relation 840. Up to 54 conditions per place. [2020-10-11 16:53:17,376 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 28 selfloop transitions, 21 changer transitions 8/91 dead transitions. [2020-10-11 16:53:17,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 91 transitions, 1044 flow [2020-10-11 16:53:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 16:53:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-11 16:53:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 642 transitions. [2020-10-11 16:53:17,379 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8337662337662337 [2020-10-11 16:53:17,379 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 642 transitions. [2020-10-11 16:53:17,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 642 transitions. [2020-10-11 16:53:17,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:17,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 642 transitions. [2020-10-11 16:53:17,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-11 16:53:17,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-11 16:53:17,384 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-11 16:53:17,385 INFO L185 Difference]: Start difference. First operand has 101 places, 73 transitions, 570 flow. Second operand 14 states and 642 transitions. [2020-10-11 16:53:17,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 91 transitions, 1044 flow [2020-10-11 16:53:17,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 91 transitions, 894 flow, removed 64 selfloop flow, removed 8 redundant places. [2020-10-11 16:53:17,394 INFO L241 Difference]: Finished difference. Result has 109 places, 77 transitions, 630 flow [2020-10-11 16:53:17,395 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=630, PETRI_PLACES=109, PETRI_TRANSITIONS=77} [2020-10-11 16:53:17,395 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2020-10-11 16:53:17,396 INFO L481 AbstractCegarLoop]: Abstraction has has 109 places, 77 transitions, 630 flow [2020-10-11 16:53:17,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 16:53:17,396 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:17,396 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:17,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:17,602 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:17,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:17,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1635532716, now seen corresponding path program 3 times [2020-10-11 16:53:17,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:17,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383866652] [2020-10-11 16:53:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:17,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383866652] [2020-10-11 16:53:17,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838526792] [2020-10-11 16:53:17,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 16:53:17,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 16:53:17,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:17,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 16:53:17,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:17,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:17,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:17,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 16:53:17,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402116835] [2020-10-11 16:53:17,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:53:17,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:17,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:53:17,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:53:17,871 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:17,872 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 77 transitions, 630 flow. Second operand 9 states. [2020-10-11 16:53:17,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:17,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:17,872 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:18,075 INFO L129 PetriNetUnfolder]: 58/319 cut-off events. [2020-10-11 16:53:18,075 INFO L130 PetriNetUnfolder]: For 3097/3221 co-relation queries the response was YES. [2020-10-11 16:53:18,078 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1217 conditions, 319 events. 58/319 cut-off events. For 3097/3221 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1574 event pairs, 0 based on Foata normal form. 41/326 useless extension candidates. Maximal degree in co-relation 1161. Up to 74 conditions per place. [2020-10-11 16:53:18,081 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 34 selfloop transitions, 26 changer transitions 8/102 dead transitions. [2020-10-11 16:53:18,081 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 102 transitions, 1250 flow [2020-10-11 16:53:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 16:53:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-11 16:53:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 692 transitions. [2020-10-11 16:53:18,084 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8387878787878787 [2020-10-11 16:53:18,084 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 692 transitions. [2020-10-11 16:53:18,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 692 transitions. [2020-10-11 16:53:18,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:18,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 692 transitions. [2020-10-11 16:53:18,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-11 16:53:18,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-11 16:53:18,089 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-11 16:53:18,089 INFO L185 Difference]: Start difference. First operand has 109 places, 77 transitions, 630 flow. Second operand 15 states and 692 transitions. [2020-10-11 16:53:18,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 102 transitions, 1250 flow [2020-10-11 16:53:18,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 1091 flow, removed 64 selfloop flow, removed 10 redundant places. [2020-10-11 16:53:18,100 INFO L241 Difference]: Finished difference. Result has 117 places, 83 transitions, 745 flow [2020-10-11 16:53:18,100 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=745, PETRI_PLACES=117, PETRI_TRANSITIONS=83} [2020-10-11 16:53:18,100 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 62 predicate places. [2020-10-11 16:53:18,100 INFO L481 AbstractCegarLoop]: Abstraction has has 117 places, 83 transitions, 745 flow [2020-10-11 16:53:18,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:53:18,101 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:18,101 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:18,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:18,316 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:18,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1271638774, now seen corresponding path program 4 times [2020-10-11 16:53:18,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:18,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937272871] [2020-10-11 16:53:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:18,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937272871] [2020-10-11 16:53:18,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227587179] [2020-10-11 16:53:18,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 16:53:18,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:53:18,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:18,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:53:18,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:18,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:18,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:18,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:18,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-10-11 16:53:18,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067451260] [2020-10-11 16:53:18,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 16:53:18,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:18,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 16:53:18,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-11 16:53:18,802 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:18,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 83 transitions, 745 flow. Second operand 10 states. [2020-10-11 16:53:18,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:18,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:18,803 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:19,153 INFO L129 PetriNetUnfolder]: 59/342 cut-off events. [2020-10-11 16:53:19,153 INFO L130 PetriNetUnfolder]: For 4315/4436 co-relation queries the response was YES. [2020-10-11 16:53:19,157 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1390 conditions, 342 events. 59/342 cut-off events. For 4315/4436 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1759 event pairs, 0 based on Foata normal form. 48/355 useless extension candidates. Maximal degree in co-relation 1330. Up to 76 conditions per place. [2020-10-11 16:53:19,162 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 30 selfloop transitions, 34 changer transitions 17/115 dead transitions. [2020-10-11 16:53:19,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 115 transitions, 1671 flow [2020-10-11 16:53:19,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 16:53:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-11 16:53:19,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 916 transitions. [2020-10-11 16:53:19,167 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8327272727272728 [2020-10-11 16:53:19,167 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 916 transitions. [2020-10-11 16:53:19,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 916 transitions. [2020-10-11 16:53:19,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:19,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 916 transitions. [2020-10-11 16:53:19,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-11 16:53:19,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-11 16:53:19,178 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-11 16:53:19,178 INFO L185 Difference]: Start difference. First operand has 117 places, 83 transitions, 745 flow. Second operand 20 states and 916 transitions. [2020-10-11 16:53:19,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 115 transitions, 1671 flow [2020-10-11 16:53:19,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 115 transitions, 1441 flow, removed 98 selfloop flow, removed 10 redundant places. [2020-10-11 16:53:19,201 INFO L241 Difference]: Finished difference. Result has 133 places, 90 transitions, 921 flow [2020-10-11 16:53:19,202 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=921, PETRI_PLACES=133, PETRI_TRANSITIONS=90} [2020-10-11 16:53:19,203 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2020-10-11 16:53:19,203 INFO L481 AbstractCegarLoop]: Abstraction has has 133 places, 90 transitions, 921 flow [2020-10-11 16:53:19,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 16:53:19,203 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:19,203 INFO L255 CegarLoopForPetriNet]: trace histogram [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] [2020-10-11 16:53:19,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-11 16:53:19,417 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:19,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:19,417 INFO L82 PathProgramCache]: Analyzing trace with hash -888506520, now seen corresponding path program 1 times [2020-10-11 16:53:19,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:19,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101978576] [2020-10-11 16:53:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:19,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101978576] [2020-10-11 16:53:19,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840354574] [2020-10-11 16:53:19,581 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 16:53:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:19,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 16:53:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:19,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:19,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:19,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 16:53:19,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710947115] [2020-10-11 16:53:19,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 16:53:19,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:19,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 16:53:19,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-11 16:53:19,737 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:19,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 90 transitions, 921 flow. Second operand 9 states. [2020-10-11 16:53:19,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:19,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:19,738 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:19,913 INFO L129 PetriNetUnfolder]: 55/322 cut-off events. [2020-10-11 16:53:19,914 INFO L130 PetriNetUnfolder]: For 5882/6028 co-relation queries the response was YES. [2020-10-11 16:53:19,917 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1444 conditions, 322 events. 55/322 cut-off events. For 5882/6028 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1586 event pairs, 0 based on Foata normal form. 37/325 useless extension candidates. Maximal degree in co-relation 1376. Up to 70 conditions per place. [2020-10-11 16:53:19,920 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 40 selfloop transitions, 25 changer transitions 8/107 dead transitions. [2020-10-11 16:53:19,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 107 transitions, 1597 flow [2020-10-11 16:53:19,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 16:53:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-11 16:53:19,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 596 transitions. [2020-10-11 16:53:19,922 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8335664335664336 [2020-10-11 16:53:19,922 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 596 transitions. [2020-10-11 16:53:19,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 596 transitions. [2020-10-11 16:53:19,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:19,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 596 transitions. [2020-10-11 16:53:19,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-11 16:53:19,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-11 16:53:19,926 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-11 16:53:19,926 INFO L185 Difference]: Start difference. First operand has 133 places, 90 transitions, 921 flow. Second operand 13 states and 596 transitions. [2020-10-11 16:53:19,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 107 transitions, 1597 flow [2020-10-11 16:53:19,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 107 transitions, 1380 flow, removed 84 selfloop flow, removed 14 redundant places. [2020-10-11 16:53:19,944 INFO L241 Difference]: Finished difference. Result has 131 places, 92 transitions, 868 flow [2020-10-11 16:53:19,945 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=868, PETRI_PLACES=131, PETRI_TRANSITIONS=92} [2020-10-11 16:53:19,946 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2020-10-11 16:53:19,946 INFO L481 AbstractCegarLoop]: Abstraction has has 131 places, 92 transitions, 868 flow [2020-10-11 16:53:19,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 16:53:19,946 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:19,946 INFO L255 CegarLoopForPetriNet]: trace histogram [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] [2020-10-11 16:53:20,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:20,160 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:20,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:20,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1653313534, now seen corresponding path program 2 times [2020-10-11 16:53:20,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:20,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102854902] [2020-10-11 16:53:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:20,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102854902] [2020-10-11 16:53:20,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906681007] [2020-10-11 16:53:20,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 16:53:20,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:53:20,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:20,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 16:53:20,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:20,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:20,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:20,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:20,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-11 16:53:20,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221601887] [2020-10-11 16:53:20,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:53:20,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:20,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:53:20,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:53:20,470 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:20,471 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 92 transitions, 868 flow. Second operand 11 states. [2020-10-11 16:53:20,471 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:20,471 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:20,471 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:20,875 INFO L129 PetriNetUnfolder]: 67/384 cut-off events. [2020-10-11 16:53:20,875 INFO L130 PetriNetUnfolder]: For 8021/8139 co-relation queries the response was YES. [2020-10-11 16:53:20,878 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1815 conditions, 384 events. 67/384 cut-off events. For 8021/8139 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2009 event pairs, 0 based on Foata normal form. 51/397 useless extension candidates. Maximal degree in co-relation 1746. Up to 82 conditions per place. [2020-10-11 16:53:20,882 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 20 selfloop transitions, 58 changer transitions 14/126 dead transitions. [2020-10-11 16:53:20,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 126 transitions, 2152 flow [2020-10-11 16:53:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 16:53:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-11 16:53:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1007 transitions. [2020-10-11 16:53:20,884 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8322314049586776 [2020-10-11 16:53:20,885 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1007 transitions. [2020-10-11 16:53:20,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1007 transitions. [2020-10-11 16:53:20,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:20,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1007 transitions. [2020-10-11 16:53:20,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-11 16:53:20,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-11 16:53:20,889 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-11 16:53:20,889 INFO L185 Difference]: Start difference. First operand has 131 places, 92 transitions, 868 flow. Second operand 22 states and 1007 transitions. [2020-10-11 16:53:20,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 126 transitions, 2152 flow [2020-10-11 16:53:20,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 126 transitions, 1828 flow, removed 141 selfloop flow, removed 12 redundant places. [2020-10-11 16:53:20,910 INFO L241 Difference]: Finished difference. Result has 148 places, 102 transitions, 1219 flow [2020-10-11 16:53:20,910 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1219, PETRI_PLACES=148, PETRI_TRANSITIONS=102} [2020-10-11 16:53:20,910 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2020-10-11 16:53:20,911 INFO L481 AbstractCegarLoop]: Abstraction has has 148 places, 102 transitions, 1219 flow [2020-10-11 16:53:20,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:53:20,911 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:20,911 INFO L255 CegarLoopForPetriNet]: trace histogram [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 16:53:21,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:21,127 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:21,127 INFO L82 PathProgramCache]: Analyzing trace with hash 321982304, now seen corresponding path program 3 times [2020-10-11 16:53:21,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:21,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172316353] [2020-10-11 16:53:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:53:21,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172316353] [2020-10-11 16:53:21,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325451522] [2020-10-11 16:53:21,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 16:53:21,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 16:53:21,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:21,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 16:53:21,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:21,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:21,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:53:21,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:21,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 16:53:21,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084963889] [2020-10-11 16:53:21,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 16:53:21,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:21,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 16:53:21,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-11 16:53:21,569 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:21,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 102 transitions, 1219 flow. Second operand 10 states. [2020-10-11 16:53:21,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:21,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:21,570 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:21,805 INFO L129 PetriNetUnfolder]: 64/380 cut-off events. [2020-10-11 16:53:21,805 INFO L130 PetriNetUnfolder]: For 10175/10316 co-relation queries the response was YES. [2020-10-11 16:53:21,808 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1904 conditions, 380 events. 64/380 cut-off events. For 10175/10316 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2012 event pairs, 0 based on Foata normal form. 48/389 useless extension candidates. Maximal degree in co-relation 1829. Up to 80 conditions per place. [2020-10-11 16:53:21,812 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 41 selfloop transitions, 38 changer transitions 5/118 dead transitions. [2020-10-11 16:53:21,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 118 transitions, 2005 flow [2020-10-11 16:53:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 16:53:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-11 16:53:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 685 transitions. [2020-10-11 16:53:21,814 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8303030303030303 [2020-10-11 16:53:21,815 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 685 transitions. [2020-10-11 16:53:21,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 685 transitions. [2020-10-11 16:53:21,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:21,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 685 transitions. [2020-10-11 16:53:21,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-11 16:53:21,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-11 16:53:21,818 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-11 16:53:21,818 INFO L185 Difference]: Start difference. First operand has 148 places, 102 transitions, 1219 flow. Second operand 15 states and 685 transitions. [2020-10-11 16:53:21,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 118 transitions, 2005 flow [2020-10-11 16:53:21,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 118 transitions, 1671 flow, removed 130 selfloop flow, removed 17 redundant places. [2020-10-11 16:53:21,841 INFO L241 Difference]: Finished difference. Result has 144 places, 105 transitions, 1166 flow [2020-10-11 16:53:21,842 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1166, PETRI_PLACES=144, PETRI_TRANSITIONS=105} [2020-10-11 16:53:21,842 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2020-10-11 16:53:21,842 INFO L481 AbstractCegarLoop]: Abstraction has has 144 places, 105 transitions, 1166 flow [2020-10-11 16:53:21,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 16:53:21,842 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:21,842 INFO L255 CegarLoopForPetriNet]: trace histogram [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 16:53:22,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-11 16:53:22,056 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:22,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:22,057 INFO L82 PathProgramCache]: Analyzing trace with hash -428356159, now seen corresponding path program 4 times [2020-10-11 16:53:22,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:22,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324989412] [2020-10-11 16:53:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:22,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324989412] [2020-10-11 16:53:22,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615747933] [2020-10-11 16:53:22,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 16:53:22,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:53:22,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:22,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:53:22,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:22,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:22,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:22,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 16:53:22,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002967058] [2020-10-11 16:53:22,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 16:53:22,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:22,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 16:53:22,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 16:53:22,343 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:22,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 105 transitions, 1166 flow. Second operand 10 states. [2020-10-11 16:53:22,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:22,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:22,344 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:22,542 INFO L129 PetriNetUnfolder]: 68/401 cut-off events. [2020-10-11 16:53:22,542 INFO L130 PetriNetUnfolder]: For 9286/9425 co-relation queries the response was YES. [2020-10-11 16:53:22,546 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1929 conditions, 401 events. 68/401 cut-off events. For 9286/9425 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2100 event pairs, 0 based on Foata normal form. 43/401 useless extension candidates. Maximal degree in co-relation 1859. Up to 94 conditions per place. [2020-10-11 16:53:22,551 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 65 selfloop transitions, 15 changer transitions 8/122 dead transitions. [2020-10-11 16:53:22,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 122 transitions, 1986 flow [2020-10-11 16:53:22,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 16:53:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-11 16:53:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 595 transitions. [2020-10-11 16:53:22,556 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8321678321678322 [2020-10-11 16:53:22,556 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 595 transitions. [2020-10-11 16:53:22,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 595 transitions. [2020-10-11 16:53:22,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:22,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 595 transitions. [2020-10-11 16:53:22,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-11 16:53:22,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-11 16:53:22,560 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-11 16:53:22,560 INFO L185 Difference]: Start difference. First operand has 144 places, 105 transitions, 1166 flow. Second operand 13 states and 595 transitions. [2020-10-11 16:53:22,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 122 transitions, 1986 flow [2020-10-11 16:53:22,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 122 transitions, 1787 flow, removed 74 selfloop flow, removed 12 redundant places. [2020-10-11 16:53:22,585 INFO L241 Difference]: Finished difference. Result has 147 places, 107 transitions, 1177 flow [2020-10-11 16:53:22,585 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1177, PETRI_PLACES=147, PETRI_TRANSITIONS=107} [2020-10-11 16:53:22,586 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2020-10-11 16:53:22,586 INFO L481 AbstractCegarLoop]: Abstraction has has 147 places, 107 transitions, 1177 flow [2020-10-11 16:53:22,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 16:53:22,586 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:22,586 INFO L255 CegarLoopForPetriNet]: trace histogram [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 16:53:22,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 16:53:22,800 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:22,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2003194879, now seen corresponding path program 5 times [2020-10-11 16:53:22,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:22,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933298783] [2020-10-11 16:53:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:22,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933298783] [2020-10-11 16:53:22,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147831933] [2020-10-11 16:53:22,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 16:53:22,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 16:53:22,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:22,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:53:22,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:22,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:22,991 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:23,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:23,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 16:53:23,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988666217] [2020-10-11 16:53:23,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:53:23,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:23,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:53:23,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:53:23,136 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:23,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 107 transitions, 1177 flow. Second operand 11 states. [2020-10-11 16:53:23,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:23,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:23,137 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:23,389 INFO L129 PetriNetUnfolder]: 70/419 cut-off events. [2020-10-11 16:53:23,390 INFO L130 PetriNetUnfolder]: For 9000/9134 co-relation queries the response was YES. [2020-10-11 16:53:23,394 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 419 events. 70/419 cut-off events. For 9000/9134 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2250 event pairs, 0 based on Foata normal form. 45/419 useless extension candidates. Maximal degree in co-relation 1895. Up to 86 conditions per place. [2020-10-11 16:53:23,398 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 58 selfloop transitions, 25 changer transitions 8/125 dead transitions. [2020-10-11 16:53:23,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 125 transitions, 2011 flow [2020-10-11 16:53:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 16:53:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-11 16:53:23,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 732 transitions. [2020-10-11 16:53:23,400 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8318181818181818 [2020-10-11 16:53:23,400 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 732 transitions. [2020-10-11 16:53:23,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 732 transitions. [2020-10-11 16:53:23,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:23,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 732 transitions. [2020-10-11 16:53:23,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-11 16:53:23,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-11 16:53:23,403 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-11 16:53:23,403 INFO L185 Difference]: Start difference. First operand has 147 places, 107 transitions, 1177 flow. Second operand 16 states and 732 transitions. [2020-10-11 16:53:23,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 125 transitions, 2011 flow [2020-10-11 16:53:23,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 125 transitions, 1909 flow, removed 38 selfloop flow, removed 10 redundant places. [2020-10-11 16:53:23,429 INFO L241 Difference]: Finished difference. Result has 154 places, 109 transitions, 1253 flow [2020-10-11 16:53:23,430 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1253, PETRI_PLACES=154, PETRI_TRANSITIONS=109} [2020-10-11 16:53:23,430 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2020-10-11 16:53:23,430 INFO L481 AbstractCegarLoop]: Abstraction has has 154 places, 109 transitions, 1253 flow [2020-10-11 16:53:23,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:53:23,430 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:23,431 INFO L255 CegarLoopForPetriNet]: trace histogram [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 16:53:23,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-11 16:53:23,644 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:23,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:23,645 INFO L82 PathProgramCache]: Analyzing trace with hash 784529653, now seen corresponding path program 6 times [2020-10-11 16:53:23,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:23,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015785833] [2020-10-11 16:53:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:23,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015785833] [2020-10-11 16:53:23,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217617891] [2020-10-11 16:53:23,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 16:53:23,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 16:53:23,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:23,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:53:23,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:23,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:23,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:23,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 16:53:23,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492776017] [2020-10-11 16:53:23,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 16:53:23,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:23,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 16:53:23,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-11 16:53:24,091 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:24,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 109 transitions, 1253 flow. Second operand 10 states. [2020-10-11 16:53:24,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:24,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:24,092 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:24,344 INFO L129 PetriNetUnfolder]: 72/437 cut-off events. [2020-10-11 16:53:24,344 INFO L130 PetriNetUnfolder]: For 10440/10579 co-relation queries the response was YES. [2020-10-11 16:53:24,348 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2118 conditions, 437 events. 72/437 cut-off events. For 10440/10579 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2425 event pairs, 0 based on Foata normal form. 47/437 useless extension candidates. Maximal degree in co-relation 2044. Up to 90 conditions per place. [2020-10-11 16:53:24,353 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 54 selfloop transitions, 32 changer transitions 8/128 dead transitions. [2020-10-11 16:53:24,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 128 transitions, 2177 flow [2020-10-11 16:53:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 16:53:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-11 16:53:24,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 778 transitions. [2020-10-11 16:53:24,356 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8320855614973262 [2020-10-11 16:53:24,356 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 778 transitions. [2020-10-11 16:53:24,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 778 transitions. [2020-10-11 16:53:24,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:24,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 778 transitions. [2020-10-11 16:53:24,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-11 16:53:24,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-11 16:53:24,359 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-11 16:53:24,359 INFO L185 Difference]: Start difference. First operand has 154 places, 109 transitions, 1253 flow. Second operand 17 states and 778 transitions. [2020-10-11 16:53:24,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 128 transitions, 2177 flow [2020-10-11 16:53:24,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 128 transitions, 2007 flow, removed 64 selfloop flow, removed 13 redundant places. [2020-10-11 16:53:24,386 INFO L241 Difference]: Finished difference. Result has 159 places, 111 transitions, 1323 flow [2020-10-11 16:53:24,387 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1323, PETRI_PLACES=159, PETRI_TRANSITIONS=111} [2020-10-11 16:53:24,387 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2020-10-11 16:53:24,387 INFO L481 AbstractCegarLoop]: Abstraction has has 159 places, 111 transitions, 1323 flow [2020-10-11 16:53:24,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 16:53:24,387 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:24,388 INFO L255 CegarLoopForPetriNet]: trace histogram [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 16:53:24,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 16:53:24,602 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:24,602 INFO L82 PathProgramCache]: Analyzing trace with hash 883973739, now seen corresponding path program 7 times [2020-10-11 16:53:24,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:24,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743480569] [2020-10-11 16:53:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:24,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743480569] [2020-10-11 16:53:24,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358074520] [2020-10-11 16:53:24,700 INFO L93 rtionOrderModulation]: Changing assertion order to 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 16:53:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:24,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:53:24,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:24,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:24,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:24,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 16:53:24,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538485864] [2020-10-11 16:53:24,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 16:53:24,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 16:53:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 16:53:24,892 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:24,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 111 transitions, 1323 flow. Second operand 10 states. [2020-10-11 16:53:24,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:24,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:24,893 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:25,197 INFO L129 PetriNetUnfolder]: 87/505 cut-off events. [2020-10-11 16:53:25,197 INFO L130 PetriNetUnfolder]: For 13225/13417 co-relation queries the response was YES. [2020-10-11 16:53:25,202 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 505 events. 87/505 cut-off events. For 13225/13417 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2894 event pairs, 0 based on Foata normal form. 54/505 useless extension candidates. Maximal degree in co-relation 2538. Up to 110 conditions per place. [2020-10-11 16:53:25,208 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 42 selfloop transitions, 56 changer transitions 8/140 dead transitions. [2020-10-11 16:53:25,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 140 transitions, 2541 flow [2020-10-11 16:53:25,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 16:53:25,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-11 16:53:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 917 transitions. [2020-10-11 16:53:25,216 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8336363636363636 [2020-10-11 16:53:25,216 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 917 transitions. [2020-10-11 16:53:25,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 917 transitions. [2020-10-11 16:53:25,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:25,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 917 transitions. [2020-10-11 16:53:25,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-11 16:53:25,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-11 16:53:25,222 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-11 16:53:25,222 INFO L185 Difference]: Start difference. First operand has 159 places, 111 transitions, 1323 flow. Second operand 20 states and 917 transitions. [2020-10-11 16:53:25,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 140 transitions, 2541 flow [2020-10-11 16:53:25,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 140 transitions, 2319 flow, removed 85 selfloop flow, removed 14 redundant places. [2020-10-11 16:53:25,257 INFO L241 Difference]: Finished difference. Result has 168 places, 117 transitions, 1582 flow [2020-10-11 16:53:25,258 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1582, PETRI_PLACES=168, PETRI_TRANSITIONS=117} [2020-10-11 16:53:25,258 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 113 predicate places. [2020-10-11 16:53:25,258 INFO L481 AbstractCegarLoop]: Abstraction has has 168 places, 117 transitions, 1582 flow [2020-10-11 16:53:25,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 16:53:25,258 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:25,259 INFO L255 CegarLoopForPetriNet]: trace histogram [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 16:53:25,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 16:53:25,473 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:25,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:25,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2099022603, now seen corresponding path program 8 times [2020-10-11 16:53:25,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:25,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724623903] [2020-10-11 16:53:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:25,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724623903] [2020-10-11 16:53:25,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888705591] [2020-10-11 16:53:25,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 16:53:25,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:53:25,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:25,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:53:25,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:25,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:25,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:25,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:25,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 16:53:25,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817036953] [2020-10-11 16:53:25,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:53:25,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:53:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:53:25,859 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:25,859 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 117 transitions, 1582 flow. Second operand 11 states. [2020-10-11 16:53:25,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:25,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:25,860 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:26,251 INFO L129 PetriNetUnfolder]: 82/497 cut-off events. [2020-10-11 16:53:26,251 INFO L130 PetriNetUnfolder]: For 14389/14567 co-relation queries the response was YES. [2020-10-11 16:53:26,256 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2624 conditions, 497 events. 82/497 cut-off events. For 14389/14567 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2885 event pairs, 0 based on Foata normal form. 56/502 useless extension candidates. Maximal degree in co-relation 2543. Up to 106 conditions per place. [2020-10-11 16:53:26,261 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 37 selfloop transitions, 61 changer transitions 11/143 dead transitions. [2020-10-11 16:53:26,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 143 transitions, 2850 flow [2020-10-11 16:53:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 16:53:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-11 16:53:26,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 914 transitions. [2020-10-11 16:53:26,263 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8309090909090909 [2020-10-11 16:53:26,263 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 914 transitions. [2020-10-11 16:53:26,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 914 transitions. [2020-10-11 16:53:26,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:26,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 914 transitions. [2020-10-11 16:53:26,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-11 16:53:26,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-11 16:53:26,267 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-11 16:53:26,267 INFO L185 Difference]: Start difference. First operand has 168 places, 117 transitions, 1582 flow. Second operand 20 states and 914 transitions. [2020-10-11 16:53:26,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 143 transitions, 2850 flow [2020-10-11 16:53:26,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 143 transitions, 2565 flow, removed 102 selfloop flow, removed 16 redundant places. [2020-10-11 16:53:26,301 INFO L241 Difference]: Finished difference. Result has 174 places, 120 transitions, 1688 flow [2020-10-11 16:53:26,301 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1688, PETRI_PLACES=174, PETRI_TRANSITIONS=120} [2020-10-11 16:53:26,302 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 119 predicate places. [2020-10-11 16:53:26,302 INFO L481 AbstractCegarLoop]: Abstraction has has 174 places, 120 transitions, 1688 flow [2020-10-11 16:53:26,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:53:26,302 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:26,302 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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 16:53:26,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:26,503 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:26,503 INFO L82 PathProgramCache]: Analyzing trace with hash 244726978, now seen corresponding path program 9 times [2020-10-11 16:53:26,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:26,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830417407] [2020-10-11 16:53:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:53:26,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830417407] [2020-10-11 16:53:26,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766250946] [2020-10-11 16:53:26,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 16:53:26,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 16:53:26,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:26,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:53:26,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:26,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:26,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:53:26,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:26,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 16:53:26,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694573131] [2020-10-11 16:53:26,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:53:26,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:26,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:53:26,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:53:26,980 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:26,980 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 120 transitions, 1688 flow. Second operand 11 states. [2020-10-11 16:53:26,980 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:26,980 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:26,980 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:27,259 INFO L129 PetriNetUnfolder]: 81/495 cut-off events. [2020-10-11 16:53:27,259 INFO L130 PetriNetUnfolder]: For 14930/15067 co-relation queries the response was YES. [2020-10-11 16:53:27,263 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2591 conditions, 495 events. 81/495 cut-off events. For 14930/15067 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2907 event pairs, 0 based on Foata normal form. 41/486 useless extension candidates. Maximal degree in co-relation 2508. Up to 101 conditions per place. [2020-10-11 16:53:27,268 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 41 selfloop transitions, 58 changer transitions 5/138 dead transitions. [2020-10-11 16:53:27,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 138 transitions, 2642 flow [2020-10-11 16:53:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 16:53:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-11 16:53:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 685 transitions. [2020-10-11 16:53:27,271 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8303030303030303 [2020-10-11 16:53:27,271 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 685 transitions. [2020-10-11 16:53:27,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 685 transitions. [2020-10-11 16:53:27,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:27,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 685 transitions. [2020-10-11 16:53:27,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-11 16:53:27,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-11 16:53:27,282 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-11 16:53:27,282 INFO L185 Difference]: Start difference. First operand has 174 places, 120 transitions, 1688 flow. Second operand 15 states and 685 transitions. [2020-10-11 16:53:27,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 138 transitions, 2642 flow [2020-10-11 16:53:27,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 138 transitions, 2423 flow, removed 55 selfloop flow, removed 19 redundant places. [2020-10-11 16:53:27,321 INFO L241 Difference]: Finished difference. Result has 170 places, 123 transitions, 1763 flow [2020-10-11 16:53:27,321 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1763, PETRI_PLACES=170, PETRI_TRANSITIONS=123} [2020-10-11 16:53:27,321 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2020-10-11 16:53:27,321 INFO L481 AbstractCegarLoop]: Abstraction has has 170 places, 123 transitions, 1763 flow [2020-10-11 16:53:27,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:53:27,322 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:27,322 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2020-10-11 16:53:27,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:27,538 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:27,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:27,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1230020921, now seen corresponding path program 10 times [2020-10-11 16:53:27,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:27,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122620304] [2020-10-11 16:53:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:27,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122620304] [2020-10-11 16:53:27,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862128877] [2020-10-11 16:53:27,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 16:53:27,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:53:27,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:27,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:53:27,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:27,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:27,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:27,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 16:53:27,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560881354] [2020-10-11 16:53:27,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 16:53:27,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:27,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 16:53:27,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-11 16:53:28,081 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:28,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 123 transitions, 1763 flow. Second operand 12 states. [2020-10-11 16:53:28,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:28,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:28,082 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:28,338 INFO L129 PetriNetUnfolder]: 85/516 cut-off events. [2020-10-11 16:53:28,339 INFO L130 PetriNetUnfolder]: For 17036/17190 co-relation queries the response was YES. [2020-10-11 16:53:28,343 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2789 conditions, 516 events. 85/516 cut-off events. For 17036/17190 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3045 event pairs, 0 based on Foata normal form. 28/489 useless extension candidates. Maximal degree in co-relation 2707. Up to 107 conditions per place. [2020-10-11 16:53:28,349 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 71 selfloop transitions, 29 changer transitions 8/142 dead transitions. [2020-10-11 16:53:28,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 142 transitions, 2815 flow [2020-10-11 16:53:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 16:53:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-11 16:53:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 686 transitions. [2020-10-11 16:53:28,353 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8315151515151515 [2020-10-11 16:53:28,353 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 686 transitions. [2020-10-11 16:53:28,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 686 transitions. [2020-10-11 16:53:28,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:28,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 686 transitions. [2020-10-11 16:53:28,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-11 16:53:28,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-11 16:53:28,359 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-11 16:53:28,359 INFO L185 Difference]: Start difference. First operand has 170 places, 123 transitions, 1763 flow. Second operand 15 states and 686 transitions. [2020-10-11 16:53:28,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 142 transitions, 2815 flow [2020-10-11 16:53:28,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 142 transitions, 2569 flow, removed 81 selfloop flow, removed 12 redundant places. [2020-10-11 16:53:28,405 INFO L241 Difference]: Finished difference. Result has 175 places, 125 transitions, 1761 flow [2020-10-11 16:53:28,405 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1595, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1761, PETRI_PLACES=175, PETRI_TRANSITIONS=125} [2020-10-11 16:53:28,405 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2020-10-11 16:53:28,405 INFO L481 AbstractCegarLoop]: Abstraction has has 175 places, 125 transitions, 1761 flow [2020-10-11 16:53:28,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 16:53:28,406 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:28,406 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2020-10-11 16:53:28,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-11 16:53:28,621 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:28,621 INFO L82 PathProgramCache]: Analyzing trace with hash 321230807, now seen corresponding path program 11 times [2020-10-11 16:53:28,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:28,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206590258] [2020-10-11 16:53:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:28,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206590258] [2020-10-11 16:53:28,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285313142] [2020-10-11 16:53:28,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 16:53:28,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 16:53:28,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:28,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:53:28,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:28,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:28,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:28,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:28,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-11 16:53:28,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423154067] [2020-10-11 16:53:28,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 16:53:28,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:28,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 16:53:28,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-11 16:53:29,026 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:29,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 125 transitions, 1761 flow. Second operand 13 states. [2020-10-11 16:53:29,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:29,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:29,027 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:29,397 INFO L129 PetriNetUnfolder]: 90/568 cut-off events. [2020-10-11 16:53:29,397 INFO L130 PetriNetUnfolder]: For 17872/18011 co-relation queries the response was YES. [2020-10-11 16:53:29,402 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2987 conditions, 568 events. 90/568 cut-off events. For 17872/18011 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3466 event pairs, 0 based on Foata normal form. 34/542 useless extension candidates. Maximal degree in co-relation 2902. Up to 117 conditions per place. [2020-10-11 16:53:29,408 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 58 selfloop transitions, 49 changer transitions 8/149 dead transitions. [2020-10-11 16:53:29,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 149 transitions, 2956 flow [2020-10-11 16:53:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 16:53:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 16:53:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 866 transitions. [2020-10-11 16:53:29,411 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8287081339712918 [2020-10-11 16:53:29,411 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 866 transitions. [2020-10-11 16:53:29,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 866 transitions. [2020-10-11 16:53:29,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:29,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 866 transitions. [2020-10-11 16:53:29,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 16:53:29,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 16:53:29,415 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 16:53:29,415 INFO L185 Difference]: Start difference. First operand has 175 places, 125 transitions, 1761 flow. Second operand 19 states and 866 transitions. [2020-10-11 16:53:29,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 149 transitions, 2956 flow [2020-10-11 16:53:29,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 149 transitions, 2768 flow, removed 69 selfloop flow, removed 12 redundant places. [2020-10-11 16:53:29,471 INFO L241 Difference]: Finished difference. Result has 186 places, 131 transitions, 1986 flow [2020-10-11 16:53:29,471 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1986, PETRI_PLACES=186, PETRI_TRANSITIONS=131} [2020-10-11 16:53:29,471 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 131 predicate places. [2020-10-11 16:53:29,472 INFO L481 AbstractCegarLoop]: Abstraction has has 186 places, 131 transitions, 1986 flow [2020-10-11 16:53:29,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 16:53:29,472 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:29,472 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2020-10-11 16:53:29,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:29,688 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:29,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1813750029, now seen corresponding path program 12 times [2020-10-11 16:53:29,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:29,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965174924] [2020-10-11 16:53:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:29,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965174924] [2020-10-11 16:53:29,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619236559] [2020-10-11 16:53:29,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 16:53:29,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 16:53:29,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:29,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:53:29,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:29,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:29,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:29,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 16:53:29,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994312936] [2020-10-11 16:53:29,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 16:53:29,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:29,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 16:53:29,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-11 16:53:30,052 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:30,053 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 131 transitions, 1986 flow. Second operand 12 states. [2020-10-11 16:53:30,053 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:30,053 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:30,053 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:30,336 INFO L129 PetriNetUnfolder]: 94/597 cut-off events. [2020-10-11 16:53:30,336 INFO L130 PetriNetUnfolder]: For 19928/20076 co-relation queries the response was YES. [2020-10-11 16:53:30,342 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3255 conditions, 597 events. 94/597 cut-off events. For 19928/20076 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3729 event pairs, 0 based on Foata normal form. 36/570 useless extension candidates. Maximal degree in co-relation 3165. Up to 125 conditions per place. [2020-10-11 16:53:30,348 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 52 selfloop transitions, 61 changer transitions 8/155 dead transitions. [2020-10-11 16:53:30,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 155 transitions, 3271 flow [2020-10-11 16:53:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 16:53:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-11 16:53:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 821 transitions. [2020-10-11 16:53:30,350 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8292929292929293 [2020-10-11 16:53:30,351 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 821 transitions. [2020-10-11 16:53:30,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 821 transitions. [2020-10-11 16:53:30,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:30,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 821 transitions. [2020-10-11 16:53:30,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-11 16:53:30,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-11 16:53:30,354 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-11 16:53:30,354 INFO L185 Difference]: Start difference. First operand has 186 places, 131 transitions, 1986 flow. Second operand 18 states and 821 transitions. [2020-10-11 16:53:30,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 155 transitions, 3271 flow [2020-10-11 16:53:30,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 155 transitions, 3051 flow, removed 80 selfloop flow, removed 13 redundant places. [2020-10-11 16:53:30,397 INFO L241 Difference]: Finished difference. Result has 194 places, 136 transitions, 2195 flow [2020-10-11 16:53:30,398 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2195, PETRI_PLACES=194, PETRI_TRANSITIONS=136} [2020-10-11 16:53:30,398 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 139 predicate places. [2020-10-11 16:53:30,398 INFO L481 AbstractCegarLoop]: Abstraction has has 194 places, 136 transitions, 2195 flow [2020-10-11 16:53:30,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 16:53:30,398 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:30,398 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2020-10-11 16:53:30,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-11 16:53:30,605 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:30,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:30,605 INFO L82 PathProgramCache]: Analyzing trace with hash 113058889, now seen corresponding path program 13 times [2020-10-11 16:53:30,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:30,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164918715] [2020-10-11 16:53:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:30,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164918715] [2020-10-11 16:53:30,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15008441] [2020-10-11 16:53:30,710 INFO L93 rtionOrderModulation]: Changing assertion order to 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 16:53:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:30,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:53:30,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:30,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:30,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:30,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:30,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-11 16:53:30,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7894419] [2020-10-11 16:53:30,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 16:53:30,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 16:53:30,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-11 16:53:31,063 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:31,064 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 136 transitions, 2195 flow. Second operand 13 states. [2020-10-11 16:53:31,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:31,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:31,064 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:31,492 INFO L129 PetriNetUnfolder]: 100/637 cut-off events. [2020-10-11 16:53:31,492 INFO L130 PetriNetUnfolder]: For 23428/23631 co-relation queries the response was YES. [2020-10-11 16:53:31,498 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3621 conditions, 637 events. 100/637 cut-off events. For 23428/23631 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4152 event pairs, 0 based on Foata normal form. 52/623 useless extension candidates. Maximal degree in co-relation 3527. Up to 135 conditions per place. [2020-10-11 16:53:31,502 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 35 selfloop transitions, 86 changer transitions 8/163 dead transitions. [2020-10-11 16:53:31,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 163 transitions, 3637 flow [2020-10-11 16:53:31,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 16:53:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-11 16:53:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 958 transitions. [2020-10-11 16:53:31,505 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8294372294372294 [2020-10-11 16:53:31,505 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 958 transitions. [2020-10-11 16:53:31,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 958 transitions. [2020-10-11 16:53:31,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:31,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 958 transitions. [2020-10-11 16:53:31,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-11 16:53:31,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-11 16:53:31,508 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-11 16:53:31,509 INFO L185 Difference]: Start difference. First operand has 194 places, 136 transitions, 2195 flow. Second operand 21 states and 958 transitions. [2020-10-11 16:53:31,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 163 transitions, 3637 flow [2020-10-11 16:53:31,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 163 transitions, 3315 flow, removed 120 selfloop flow, removed 13 redundant places. [2020-10-11 16:53:31,566 INFO L241 Difference]: Finished difference. Result has 204 places, 143 transitions, 2468 flow [2020-10-11 16:53:31,566 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2468, PETRI_PLACES=204, PETRI_TRANSITIONS=143} [2020-10-11 16:53:31,566 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 149 predicate places. [2020-10-11 16:53:31,566 INFO L481 AbstractCegarLoop]: Abstraction has has 204 places, 143 transitions, 2468 flow [2020-10-11 16:53:31,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 16:53:31,566 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:31,566 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2020-10-11 16:53:31,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-11 16:53:31,767 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:31,768 INFO L82 PathProgramCache]: Analyzing trace with hash -125323625, now seen corresponding path program 14 times [2020-10-11 16:53:31,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:31,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351444772] [2020-10-11 16:53:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:31,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351444772] [2020-10-11 16:53:31,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458464705] [2020-10-11 16:53:31,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 16:53:31,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:53:31,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:31,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:53:31,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:31,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:31,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:31,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:31,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 16:53:31,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312581455] [2020-10-11 16:53:31,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 16:53:31,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:31,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 16:53:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-11 16:53:32,267 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:32,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 143 transitions, 2468 flow. Second operand 12 states. [2020-10-11 16:53:32,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:32,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:32,268 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:32,868 INFO L129 PetriNetUnfolder]: 106/689 cut-off events. [2020-10-11 16:53:32,868 INFO L130 PetriNetUnfolder]: For 24509/24674 co-relation queries the response was YES. [2020-10-11 16:53:32,877 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3886 conditions, 689 events. 106/689 cut-off events. For 24509/24674 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4595 event pairs, 0 based on Foata normal form. 62/680 useless extension candidates. Maximal degree in co-relation 3789. Up to 141 conditions per place. [2020-10-11 16:53:32,884 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 32 selfloop transitions, 97 changer transitions 8/171 dead transitions. [2020-10-11 16:53:32,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 171 transitions, 4006 flow [2020-10-11 16:53:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 16:53:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-11 16:53:32,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1005 transitions. [2020-10-11 16:53:32,887 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8305785123966942 [2020-10-11 16:53:32,887 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1005 transitions. [2020-10-11 16:53:32,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1005 transitions. [2020-10-11 16:53:32,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:32,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1005 transitions. [2020-10-11 16:53:32,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-11 16:53:32,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-11 16:53:32,891 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-11 16:53:32,891 INFO L185 Difference]: Start difference. First operand has 204 places, 143 transitions, 2468 flow. Second operand 22 states and 1005 transitions. [2020-10-11 16:53:32,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 171 transitions, 4006 flow [2020-10-11 16:53:32,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 171 transitions, 3644 flow, removed 116 selfloop flow, removed 17 redundant places. [2020-10-11 16:53:32,964 INFO L241 Difference]: Finished difference. Result has 212 places, 149 transitions, 2711 flow [2020-10-11 16:53:32,964 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2206, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2711, PETRI_PLACES=212, PETRI_TRANSITIONS=149} [2020-10-11 16:53:32,965 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 157 predicate places. [2020-10-11 16:53:32,965 INFO L481 AbstractCegarLoop]: Abstraction has has 212 places, 149 transitions, 2711 flow [2020-10-11 16:53:32,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 16:53:32,965 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:32,965 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-11 16:53:33,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-11 16:53:33,175 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:33,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:33,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1905174, now seen corresponding path program 15 times [2020-10-11 16:53:33,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:33,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945641075] [2020-10-11 16:53:33,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:33,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945641075] [2020-10-11 16:53:33,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863728532] [2020-10-11 16:53:33,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 16:53:33,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 16:53:33,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:33,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:53:33,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:33,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:33,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:33,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 16:53:33,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947261653] [2020-10-11 16:53:33,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 16:53:33,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:33,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 16:53:33,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 16:53:33,800 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:33,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 149 transitions, 2711 flow. Second operand 13 states. [2020-10-11 16:53:33,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:33,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:33,802 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:34,098 INFO L129 PetriNetUnfolder]: 108/693 cut-off events. [2020-10-11 16:53:34,098 INFO L130 PetriNetUnfolder]: For 26856/27029 co-relation queries the response was YES. [2020-10-11 16:53:34,105 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4069 conditions, 693 events. 108/693 cut-off events. For 26856/27029 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4565 event pairs, 0 based on Foata normal form. 33/654 useless extension candidates. Maximal degree in co-relation 3968. Up to 165 conditions per place. [2020-10-11 16:53:34,111 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 109 selfloop transitions, 17 changer transitions 8/168 dead transitions. [2020-10-11 16:53:34,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 168 transitions, 3913 flow [2020-10-11 16:53:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 16:53:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-11 16:53:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 685 transitions. [2020-10-11 16:53:34,113 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8303030303030303 [2020-10-11 16:53:34,113 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 685 transitions. [2020-10-11 16:53:34,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 685 transitions. [2020-10-11 16:53:34,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:34,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 685 transitions. [2020-10-11 16:53:34,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-11 16:53:34,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-11 16:53:34,116 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-11 16:53:34,116 INFO L185 Difference]: Start difference. First operand has 212 places, 149 transitions, 2711 flow. Second operand 15 states and 685 transitions. [2020-10-11 16:53:34,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 168 transitions, 3913 flow [2020-10-11 16:53:34,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 168 transitions, 3604 flow, removed 98 selfloop flow, removed 16 redundant places. [2020-10-11 16:53:34,189 INFO L241 Difference]: Finished difference. Result has 212 places, 151 transitions, 2606 flow [2020-10-11 16:53:34,190 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2606, PETRI_PLACES=212, PETRI_TRANSITIONS=151} [2020-10-11 16:53:34,190 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 157 predicate places. [2020-10-11 16:53:34,190 INFO L481 AbstractCegarLoop]: Abstraction has has 212 places, 151 transitions, 2606 flow [2020-10-11 16:53:34,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 16:53:34,190 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:34,190 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-11 16:53:34,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-11 16:53:34,391 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:34,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1549384148, now seen corresponding path program 16 times [2020-10-11 16:53:34,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:34,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621912831] [2020-10-11 16:53:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:34,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621912831] [2020-10-11 16:53:34,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963750312] [2020-10-11 16:53:34,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 16:53:34,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:53:34,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:34,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 16:53:34,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:34,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:34,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:34,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 16:53:34,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139322958] [2020-10-11 16:53:34,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 16:53:34,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:34,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 16:53:34,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-11 16:53:34,832 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:34,832 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 151 transitions, 2606 flow. Second operand 13 states. [2020-10-11 16:53:34,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:34,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:34,833 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:35,224 INFO L129 PetriNetUnfolder]: 110/725 cut-off events. [2020-10-11 16:53:35,225 INFO L130 PetriNetUnfolder]: For 28212/28368 co-relation queries the response was YES. [2020-10-11 16:53:35,231 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4146 conditions, 725 events. 110/725 cut-off events. For 28212/28368 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4831 event pairs, 0 based on Foata normal form. 39/689 useless extension candidates. Maximal degree in co-relation 4043. Up to 145 conditions per place. [2020-10-11 16:53:35,238 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 94 selfloop transitions, 36 changer transitions 8/172 dead transitions. [2020-10-11 16:53:35,238 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 172 transitions, 3940 flow [2020-10-11 16:53:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 16:53:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 16:53:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 868 transitions. [2020-10-11 16:53:35,240 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.830622009569378 [2020-10-11 16:53:35,241 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 868 transitions. [2020-10-11 16:53:35,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 868 transitions. [2020-10-11 16:53:35,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:35,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 868 transitions. [2020-10-11 16:53:35,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 16:53:35,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 16:53:35,245 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 16:53:35,245 INFO L185 Difference]: Start difference. First operand has 212 places, 151 transitions, 2606 flow. Second operand 19 states and 868 transitions. [2020-10-11 16:53:35,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 172 transitions, 3940 flow [2020-10-11 16:53:35,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 172 transitions, 3750 flow, removed 80 selfloop flow, removed 12 redundant places. [2020-10-11 16:53:35,303 INFO L241 Difference]: Finished difference. Result has 220 places, 153 transitions, 2693 flow [2020-10-11 16:53:35,303 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2693, PETRI_PLACES=220, PETRI_TRANSITIONS=153} [2020-10-11 16:53:35,304 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 165 predicate places. [2020-10-11 16:53:35,304 INFO L481 AbstractCegarLoop]: Abstraction has has 220 places, 153 transitions, 2693 flow [2020-10-11 16:53:35,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 16:53:35,304 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:35,304 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-11 16:53:35,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-11 16:53:35,505 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:35,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1443017462, now seen corresponding path program 17 times [2020-10-11 16:53:35,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:35,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408735832] [2020-10-11 16:53:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:35,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408735832] [2020-10-11 16:53:35,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159808312] [2020-10-11 16:53:35,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 16:53:35,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 16:53:35,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:35,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:53:35,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:35,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:35,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:35,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:35,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-11 16:53:35,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424709531] [2020-10-11 16:53:35,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:53:35,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:35,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:53:35,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:53:36,368 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:36,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 153 transitions, 2693 flow. Second operand 14 states. [2020-10-11 16:53:36,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:36,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:36,369 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:36,839 INFO L129 PetriNetUnfolder]: 117/781 cut-off events. [2020-10-11 16:53:36,839 INFO L130 PetriNetUnfolder]: For 30490/30660 co-relation queries the response was YES. [2020-10-11 16:53:36,848 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4483 conditions, 781 events. 117/781 cut-off events. For 30490/30660 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5406 event pairs, 0 based on Foata normal form. 47/747 useless extension candidates. Maximal degree in co-relation 4378. Up to 158 conditions per place. [2020-10-11 16:53:36,856 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 79 selfloop transitions, 61 changer transitions 8/182 dead transitions. [2020-10-11 16:53:36,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 182 transitions, 4267 flow [2020-10-11 16:53:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 16:53:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-11 16:53:36,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 957 transitions. [2020-10-11 16:53:36,858 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2020-10-11 16:53:36,858 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 957 transitions. [2020-10-11 16:53:36,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 957 transitions. [2020-10-11 16:53:36,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:36,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 957 transitions. [2020-10-11 16:53:36,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-11 16:53:36,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-11 16:53:36,862 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-11 16:53:36,862 INFO L185 Difference]: Start difference. First operand has 220 places, 153 transitions, 2693 flow. Second operand 21 states and 957 transitions. [2020-10-11 16:53:36,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 182 transitions, 4267 flow [2020-10-11 16:53:36,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 182 transitions, 4040 flow, removed 82 selfloop flow, removed 16 redundant places. [2020-10-11 16:53:36,960 INFO L241 Difference]: Finished difference. Result has 229 places, 162 transitions, 3023 flow [2020-10-11 16:53:36,960 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3023, PETRI_PLACES=229, PETRI_TRANSITIONS=162} [2020-10-11 16:53:36,961 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 174 predicate places. [2020-10-11 16:53:36,961 INFO L481 AbstractCegarLoop]: Abstraction has has 229 places, 162 transitions, 3023 flow [2020-10-11 16:53:36,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:53:36,961 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:36,961 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-11 16:53:37,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:37,176 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:37,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1243630666, now seen corresponding path program 18 times [2020-10-11 16:53:37,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:37,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087314080] [2020-10-11 16:53:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:37,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087314080] [2020-10-11 16:53:37,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355578559] [2020-10-11 16:53:37,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 16:53:37,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 16:53:37,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:37,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:53:37,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:37,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:37,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:37,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:37,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-11 16:53:37,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000538805] [2020-10-11 16:53:37,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:53:37,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:37,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:53:37,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:53:37,711 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:37,712 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 162 transitions, 3023 flow. Second operand 14 states. [2020-10-11 16:53:37,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:37,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:37,712 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:38,274 INFO L129 PetriNetUnfolder]: 120/801 cut-off events. [2020-10-11 16:53:38,275 INFO L130 PetriNetUnfolder]: For 32914/33102 co-relation queries the response was YES. [2020-10-11 16:53:38,287 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4725 conditions, 801 events. 120/801 cut-off events. For 32914/33102 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5577 event pairs, 0 based on Foata normal form. 62/780 useless extension candidates. Maximal degree in co-relation 4614. Up to 164 conditions per place. [2020-10-11 16:53:38,300 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 61 selfloop transitions, 85 changer transitions 8/188 dead transitions. [2020-10-11 16:53:38,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 188 transitions, 4632 flow [2020-10-11 16:53:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 16:53:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-11 16:53:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1049 transitions. [2020-10-11 16:53:38,302 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8292490118577075 [2020-10-11 16:53:38,303 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1049 transitions. [2020-10-11 16:53:38,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1049 transitions. [2020-10-11 16:53:38,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:38,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1049 transitions. [2020-10-11 16:53:38,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-11 16:53:38,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-11 16:53:38,307 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-11 16:53:38,307 INFO L185 Difference]: Start difference. First operand has 229 places, 162 transitions, 3023 flow. Second operand 23 states and 1049 transitions. [2020-10-11 16:53:38,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 188 transitions, 4632 flow [2020-10-11 16:53:38,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 188 transitions, 4378 flow, removed 89 selfloop flow, removed 15 redundant places. [2020-10-11 16:53:38,440 INFO L241 Difference]: Finished difference. Result has 239 places, 166 transitions, 3237 flow [2020-10-11 16:53:38,440 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2841, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3237, PETRI_PLACES=239, PETRI_TRANSITIONS=166} [2020-10-11 16:53:38,444 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 184 predicate places. [2020-10-11 16:53:38,444 INFO L481 AbstractCegarLoop]: Abstraction has has 239 places, 166 transitions, 3237 flow [2020-10-11 16:53:38,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:53:38,445 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:38,445 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-11 16:53:38,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-11 16:53:38,659 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:38,659 INFO L82 PathProgramCache]: Analyzing trace with hash -529970410, now seen corresponding path program 19 times [2020-10-11 16:53:38,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:38,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904547627] [2020-10-11 16:53:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:38,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904547627] [2020-10-11 16:53:38,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888432588] [2020-10-11 16:53:38,756 INFO L93 rtionOrderModulation]: Changing assertion order to 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 16:53:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:38,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:53:38,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:38,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:38,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:38,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 16:53:38,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057489240] [2020-10-11 16:53:38,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 16:53:38,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:38,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 16:53:38,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-11 16:53:39,206 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:39,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 166 transitions, 3237 flow. Second operand 13 states. [2020-10-11 16:53:39,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:39,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:39,207 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:39,684 INFO L129 PetriNetUnfolder]: 135/876 cut-off events. [2020-10-11 16:53:39,684 INFO L130 PetriNetUnfolder]: For 41657/41937 co-relation queries the response was YES. [2020-10-11 16:53:39,693 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5513 conditions, 876 events. 135/876 cut-off events. For 41657/41937 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6113 event pairs, 0 based on Foata normal form. 66/850 useless extension candidates. Maximal degree in co-relation 5399. Up to 182 conditions per place. [2020-10-11 16:53:39,700 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 62 selfloop transitions, 95 changer transitions 8/199 dead transitions. [2020-10-11 16:53:39,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 199 transitions, 5155 flow [2020-10-11 16:53:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 16:53:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-11 16:53:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1099 transitions. [2020-10-11 16:53:39,702 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8325757575757575 [2020-10-11 16:53:39,702 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1099 transitions. [2020-10-11 16:53:39,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1099 transitions. [2020-10-11 16:53:39,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:39,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1099 transitions. [2020-10-11 16:53:39,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-11 16:53:39,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-11 16:53:39,705 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-11 16:53:39,705 INFO L185 Difference]: Start difference. First operand has 239 places, 166 transitions, 3237 flow. Second operand 24 states and 1099 transitions. [2020-10-11 16:53:39,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 199 transitions, 5155 flow [2020-10-11 16:53:39,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 199 transitions, 4741 flow, removed 138 selfloop flow, removed 20 redundant places. [2020-10-11 16:53:39,793 INFO L241 Difference]: Finished difference. Result has 246 places, 172 transitions, 3496 flow [2020-10-11 16:53:39,794 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3496, PETRI_PLACES=246, PETRI_TRANSITIONS=172} [2020-10-11 16:53:39,794 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 191 predicate places. [2020-10-11 16:53:39,794 INFO L481 AbstractCegarLoop]: Abstraction has has 246 places, 172 transitions, 3496 flow [2020-10-11 16:53:39,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 16:53:39,794 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:39,795 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2020-10-11 16:53:39,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:39,995 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:39,996 INFO L82 PathProgramCache]: Analyzing trace with hash 33589492, now seen corresponding path program 20 times [2020-10-11 16:53:39,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:39,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077084504] [2020-10-11 16:53:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:40,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077084504] [2020-10-11 16:53:40,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886733916] [2020-10-11 16:53:40,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 16:53:40,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:53:40,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:53:40,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:40,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:40,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:40,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:40,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-11 16:53:40,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069760256] [2020-10-11 16:53:40,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:53:40,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:40,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:53:40,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:53:40,752 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:40,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 172 transitions, 3496 flow. Second operand 14 states. [2020-10-11 16:53:40,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:40,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:40,753 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:41,567 INFO L129 PetriNetUnfolder]: 136/892 cut-off events. [2020-10-11 16:53:41,568 INFO L130 PetriNetUnfolder]: For 46517/46789 co-relation queries the response was YES. [2020-10-11 16:53:41,583 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5802 conditions, 892 events. 136/892 cut-off events. For 46517/46789 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6252 event pairs, 0 based on Foata normal form. 77/877 useless extension candidates. Maximal degree in co-relation 5685. Up to 184 conditions per place. [2020-10-11 16:53:41,597 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 54 selfloop transitions, 107 changer transitions 17/212 dead transitions. [2020-10-11 16:53:41,597 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 212 transitions, 6036 flow [2020-10-11 16:53:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 16:53:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-11 16:53:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1280 transitions. [2020-10-11 16:53:41,600 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8311688311688312 [2020-10-11 16:53:41,601 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1280 transitions. [2020-10-11 16:53:41,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1280 transitions. [2020-10-11 16:53:41,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:41,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1280 transitions. [2020-10-11 16:53:41,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-11 16:53:41,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-11 16:53:41,607 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-11 16:53:41,608 INFO L185 Difference]: Start difference. First operand has 246 places, 172 transitions, 3496 flow. Second operand 28 states and 1280 transitions. [2020-10-11 16:53:41,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 212 transitions, 6036 flow [2020-10-11 16:53:41,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 212 transitions, 5499 flow, removed 195 selfloop flow, removed 20 redundant places. [2020-10-11 16:53:41,860 INFO L241 Difference]: Finished difference. Result has 260 places, 179 transitions, 3846 flow [2020-10-11 16:53:41,861 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3175, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3846, PETRI_PLACES=260, PETRI_TRANSITIONS=179} [2020-10-11 16:53:41,865 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 205 predicate places. [2020-10-11 16:53:41,866 INFO L481 AbstractCegarLoop]: Abstraction has has 260 places, 179 transitions, 3846 flow [2020-10-11 16:53:41,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:53:41,866 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:41,866 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:42,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-11 16:53:42,080 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:42,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:42,080 INFO L82 PathProgramCache]: Analyzing trace with hash 18599618, now seen corresponding path program 21 times [2020-10-11 16:53:42,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:42,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281030704] [2020-10-11 16:53:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:42,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281030704] [2020-10-11 16:53:42,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167626543] [2020-10-11 16:53:42,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 16:53:42,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 16:53:42,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:42,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:53:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:42,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:42,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:42,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 16:53:42,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509731061] [2020-10-11 16:53:42,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:53:42,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:42,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:53:42,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:53:42,586 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:42,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 179 transitions, 3846 flow. Second operand 14 states. [2020-10-11 16:53:42,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:42,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:42,587 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:43,028 INFO L129 PetriNetUnfolder]: 132/879 cut-off events. [2020-10-11 16:53:43,028 INFO L130 PetriNetUnfolder]: For 54009/54249 co-relation queries the response was YES. [2020-10-11 16:53:43,038 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5938 conditions, 879 events. 132/879 cut-off events. For 54009/54249 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6195 event pairs, 0 based on Foata normal form. 37/825 useless extension candidates. Maximal degree in co-relation 5815. Up to 178 conditions per place. [2020-10-11 16:53:43,045 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 120 selfloop transitions, 38 changer transitions 8/200 dead transitions. [2020-10-11 16:53:43,046 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 200 transitions, 5488 flow [2020-10-11 16:53:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 16:53:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-11 16:53:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 776 transitions. [2020-10-11 16:53:43,052 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8299465240641711 [2020-10-11 16:53:43,053 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 776 transitions. [2020-10-11 16:53:43,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 776 transitions. [2020-10-11 16:53:43,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:43,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 776 transitions. [2020-10-11 16:53:43,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-11 16:53:43,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-11 16:53:43,056 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-11 16:53:43,057 INFO L185 Difference]: Start difference. First operand has 260 places, 179 transitions, 3846 flow. Second operand 17 states and 776 transitions. [2020-10-11 16:53:43,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 200 transitions, 5488 flow [2020-10-11 16:53:43,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 200 transitions, 4898 flow, removed 207 selfloop flow, removed 23 redundant places. [2020-10-11 16:53:43,272 INFO L241 Difference]: Finished difference. Result has 253 places, 181 transitions, 3552 flow [2020-10-11 16:53:43,273 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3552, PETRI_PLACES=253, PETRI_TRANSITIONS=181} [2020-10-11 16:53:43,273 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 198 predicate places. [2020-10-11 16:53:43,273 INFO L481 AbstractCegarLoop]: Abstraction has has 253 places, 181 transitions, 3552 flow [2020-10-11 16:53:43,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:53:43,273 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:43,274 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:43,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:43,489 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:43,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1591911048, now seen corresponding path program 22 times [2020-10-11 16:53:43,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:43,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718686696] [2020-10-11 16:53:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:43,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718686696] [2020-10-11 16:53:43,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896128141] [2020-10-11 16:53:43,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 16:53:43,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:53:43,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:43,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 16:53:43,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:43,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:43,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:43,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 16:53:43,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389088984] [2020-10-11 16:53:43,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:53:43,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:43,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:53:43,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:53:43,943 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:43,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 181 transitions, 3552 flow. Second operand 14 states. [2020-10-11 16:53:43,944 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:43,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:43,944 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:44,434 INFO L129 PetriNetUnfolder]: 134/897 cut-off events. [2020-10-11 16:53:44,434 INFO L130 PetriNetUnfolder]: For 54332/54545 co-relation queries the response was YES. [2020-10-11 16:53:44,442 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5887 conditions, 897 events. 134/897 cut-off events. For 54332/54545 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6278 event pairs, 0 based on Foata normal form. 47/850 useless extension candidates. Maximal degree in co-relation 5765. Up to 178 conditions per place. [2020-10-11 16:53:44,449 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 88 selfloop transitions, 74 changer transitions 8/204 dead transitions. [2020-10-11 16:53:44,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 204 transitions, 5340 flow [2020-10-11 16:53:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 16:53:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-11 16:53:44,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 911 transitions. [2020-10-11 16:53:44,452 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8281818181818181 [2020-10-11 16:53:44,452 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 911 transitions. [2020-10-11 16:53:44,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 911 transitions. [2020-10-11 16:53:44,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:44,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 911 transitions. [2020-10-11 16:53:44,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-11 16:53:44,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-11 16:53:44,455 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-11 16:53:44,455 INFO L185 Difference]: Start difference. First operand has 253 places, 181 transitions, 3552 flow. Second operand 20 states and 911 transitions. [2020-10-11 16:53:44,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 204 transitions, 5340 flow [2020-10-11 16:53:44,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 204 transitions, 5034 flow, removed 119 selfloop flow, removed 14 redundant places. [2020-10-11 16:53:44,650 INFO L241 Difference]: Finished difference. Result has 260 places, 183 transitions, 3686 flow [2020-10-11 16:53:44,651 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3686, PETRI_PLACES=260, PETRI_TRANSITIONS=183} [2020-10-11 16:53:44,651 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 205 predicate places. [2020-10-11 16:53:44,651 INFO L481 AbstractCegarLoop]: Abstraction has has 260 places, 183 transitions, 3686 flow [2020-10-11 16:53:44,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:53:44,652 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:44,652 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:44,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-11 16:53:44,866 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:44,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1231984654, now seen corresponding path program 23 times [2020-10-11 16:53:44,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:44,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424777271] [2020-10-11 16:53:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:45,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424777271] [2020-10-11 16:53:45,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106568660] [2020-10-11 16:53:45,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 16:53:45,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 16:53:45,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:45,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:53:45,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:45,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:45,118 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:45,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:45,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-11 16:53:45,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365911456] [2020-10-11 16:53:45,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:53:45,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:45,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:53:45,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:53:45,376 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:45,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 183 transitions, 3686 flow. Second operand 15 states. [2020-10-11 16:53:45,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:45,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:45,377 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:46,031 INFO L129 PetriNetUnfolder]: 137/910 cut-off events. [2020-10-11 16:53:46,031 INFO L130 PetriNetUnfolder]: For 52438/52693 co-relation queries the response was YES. [2020-10-11 16:53:46,044 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5987 conditions, 910 events. 137/910 cut-off events. For 52438/52693 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6375 event pairs, 0 based on Foata normal form. 73/888 useless extension candidates. Maximal degree in co-relation 5863. Up to 184 conditions per place. [2020-10-11 16:53:46,053 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 49 selfloop transitions, 120 changer transitions 8/211 dead transitions. [2020-10-11 16:53:46,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 211 transitions, 5709 flow [2020-10-11 16:53:46,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 16:53:46,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-11 16:53:46,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1140 transitions. [2020-10-11 16:53:46,055 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8290909090909091 [2020-10-11 16:53:46,055 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1140 transitions. [2020-10-11 16:53:46,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1140 transitions. [2020-10-11 16:53:46,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:46,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1140 transitions. [2020-10-11 16:53:46,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-11 16:53:46,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-11 16:53:46,059 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-11 16:53:46,059 INFO L185 Difference]: Start difference. First operand has 260 places, 183 transitions, 3686 flow. Second operand 25 states and 1140 transitions. [2020-10-11 16:53:46,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 211 transitions, 5709 flow [2020-10-11 16:53:46,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 211 transitions, 5393 flow, removed 93 selfloop flow, removed 17 redundant places. [2020-10-11 16:53:46,252 INFO L241 Difference]: Finished difference. Result has 270 places, 187 transitions, 3973 flow [2020-10-11 16:53:46,252 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3973, PETRI_PLACES=270, PETRI_TRANSITIONS=187} [2020-10-11 16:53:46,253 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 215 predicate places. [2020-10-11 16:53:46,253 INFO L481 AbstractCegarLoop]: Abstraction has has 270 places, 187 transitions, 3973 flow [2020-10-11 16:53:46,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:53:46,253 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:46,253 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:46,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:46,469 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:46,469 INFO L82 PathProgramCache]: Analyzing trace with hash -850037076, now seen corresponding path program 24 times [2020-10-11 16:53:46,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:46,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590327796] [2020-10-11 16:53:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:46,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590327796] [2020-10-11 16:53:46,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955188078] [2020-10-11 16:53:46,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 16:53:46,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 16:53:46,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:46,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:53:46,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:46,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:46,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:46,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:46,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-11 16:53:46,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974089414] [2020-10-11 16:53:46,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:53:46,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:46,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:53:46,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:53:46,843 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:46,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 187 transitions, 3973 flow. Second operand 15 states. [2020-10-11 16:53:46,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:46,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:46,845 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:47,729 INFO L129 PetriNetUnfolder]: 149/965 cut-off events. [2020-10-11 16:53:47,729 INFO L130 PetriNetUnfolder]: For 60427/60717 co-relation queries the response was YES. [2020-10-11 16:53:47,737 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6720 conditions, 965 events. 149/965 cut-off events. For 60427/60717 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6770 event pairs, 0 based on Foata normal form. 82/948 useless extension candidates. Maximal degree in co-relation 6593. Up to 200 conditions per place. [2020-10-11 16:53:47,747 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 41 selfloop transitions, 140 changer transitions 14/229 dead transitions. [2020-10-11 16:53:47,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 229 transitions, 6881 flow [2020-10-11 16:53:47,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 16:53:47,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-11 16:53:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1371 transitions. [2020-10-11 16:53:47,749 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8309090909090909 [2020-10-11 16:53:47,749 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1371 transitions. [2020-10-11 16:53:47,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1371 transitions. [2020-10-11 16:53:47,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:47,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1371 transitions. [2020-10-11 16:53:47,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-11 16:53:47,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-11 16:53:47,754 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-11 16:53:47,754 INFO L185 Difference]: Start difference. First operand has 270 places, 187 transitions, 3973 flow. Second operand 30 states and 1371 transitions. [2020-10-11 16:53:47,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 229 transitions, 6881 flow [2020-10-11 16:53:47,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 229 transitions, 6409 flow, removed 134 selfloop flow, removed 21 redundant places. [2020-10-11 16:53:47,974 INFO L241 Difference]: Finished difference. Result has 286 places, 197 transitions, 4542 flow [2020-10-11 16:53:47,974 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4542, PETRI_PLACES=286, PETRI_TRANSITIONS=197} [2020-10-11 16:53:47,974 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 231 predicate places. [2020-10-11 16:53:47,975 INFO L481 AbstractCegarLoop]: Abstraction has has 286 places, 197 transitions, 4542 flow [2020-10-11 16:53:47,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:53:47,975 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:47,975 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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] [2020-10-11 16:53:48,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-11 16:53:48,190 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:48,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:48,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1911922060, now seen corresponding path program 25 times [2020-10-11 16:53:48,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:48,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126670546] [2020-10-11 16:53:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:53:48,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126670546] [2020-10-11 16:53:48,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833021437] [2020-10-11 16:53:48,317 INFO L93 rtionOrderModulation]: Changing assertion order to 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 16:53:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:48,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:53:48,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:48,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:48,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:53:48,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:48,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-11 16:53:48,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220789837] [2020-10-11 16:53:48,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:53:48,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:48,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:53:48,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:53:48,946 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:48,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 197 transitions, 4542 flow. Second operand 15 states. [2020-10-11 16:53:48,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:48,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:48,947 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:49,795 INFO L129 PetriNetUnfolder]: 166/1095 cut-off events. [2020-10-11 16:53:49,795 INFO L130 PetriNetUnfolder]: For 90850/91165 co-relation queries the response was YES. [2020-10-11 16:53:49,803 INFO L80 FinitePrefix]: Finished finitePrefix Result has 8300 conditions, 1095 events. 166/1095 cut-off events. For 90850/91165 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 8097 event pairs, 0 based on Foata normal form. 80/1061 useless extension candidates. Maximal degree in co-relation 8165. Up to 228 conditions per place. [2020-10-11 16:53:49,815 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 73 selfloop transitions, 128 changer transitions 11/246 dead transitions. [2020-10-11 16:53:49,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 246 transitions, 7930 flow [2020-10-11 16:53:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 16:53:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-11 16:53:49,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1279 transitions. [2020-10-11 16:53:49,817 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8305194805194805 [2020-10-11 16:53:49,817 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1279 transitions. [2020-10-11 16:53:49,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1279 transitions. [2020-10-11 16:53:49,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:49,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1279 transitions. [2020-10-11 16:53:49,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-11 16:53:49,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-11 16:53:49,821 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-11 16:53:49,822 INFO L185 Difference]: Start difference. First operand has 286 places, 197 transitions, 4542 flow. Second operand 28 states and 1279 transitions. [2020-10-11 16:53:49,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 246 transitions, 7930 flow [2020-10-11 16:53:50,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 246 transitions, 7088 flow, removed 323 selfloop flow, removed 22 redundant places. [2020-10-11 16:53:50,021 INFO L241 Difference]: Finished difference. Result has 295 places, 218 transitions, 5237 flow [2020-10-11 16:53:50,022 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3920, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5237, PETRI_PLACES=295, PETRI_TRANSITIONS=218} [2020-10-11 16:53:50,022 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 240 predicate places. [2020-10-11 16:53:50,023 INFO L481 AbstractCegarLoop]: Abstraction has has 295 places, 218 transitions, 5237 flow [2020-10-11 16:53:50,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:53:50,023 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:50,023 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 4, 4, 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] [2020-10-11 16:53:50,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:50,239 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:50,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:50,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1765090194, now seen corresponding path program 26 times [2020-10-11 16:53:50,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:50,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201844452] [2020-10-11 16:53:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 59 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:53:50,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201844452] [2020-10-11 16:53:50,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964379950] [2020-10-11 16:53:50,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 16:53:50,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:53:50,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:53:50,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:53:50,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 16:53:50,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-10-11 16:53:50,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656959630] [2020-10-11 16:53:50,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 16:53:50,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:50,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 16:53:50,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:53:50,515 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 55 [2020-10-11 16:53:50,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 218 transitions, 5237 flow. Second operand 13 states. [2020-10-11 16:53:50,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:50,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 55 [2020-10-11 16:53:50,516 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:51,624 INFO L129 PetriNetUnfolder]: 439/2700 cut-off events. [2020-10-11 16:53:51,624 INFO L130 PetriNetUnfolder]: For 204396/204697 co-relation queries the response was YES. [2020-10-11 16:53:51,687 INFO L80 FinitePrefix]: Finished finitePrefix Result has 19064 conditions, 2700 events. 439/2700 cut-off events. For 204396/204697 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 26429 event pairs, 77 based on Foata normal form. 44/2482 useless extension candidates. Maximal degree in co-relation 18927. Up to 507 conditions per place. [2020-10-11 16:53:51,721 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 7 selfloop transitions, 21 changer transitions 0/236 dead transitions. [2020-10-11 16:53:51,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 236 transitions, 5291 flow [2020-10-11 16:53:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 16:53:51,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-11 16:53:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 839 transitions. [2020-10-11 16:53:51,726 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8474747474747475 [2020-10-11 16:53:51,727 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 839 transitions. [2020-10-11 16:53:51,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 839 transitions. [2020-10-11 16:53:51,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:51,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 839 transitions. [2020-10-11 16:53:51,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-11 16:53:51,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-11 16:53:51,926 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-11 16:53:51,926 INFO L185 Difference]: Start difference. First operand has 295 places, 218 transitions, 5237 flow. Second operand 18 states and 839 transitions. [2020-10-11 16:53:51,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 236 transitions, 5291 flow [2020-10-11 16:53:52,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 236 transitions, 4555 flow, removed 290 selfloop flow, removed 22 redundant places. [2020-10-11 16:53:52,387 INFO L241 Difference]: Finished difference. Result has 287 places, 232 transitions, 4543 flow [2020-10-11 16:53:52,387 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4543, PETRI_PLACES=287, PETRI_TRANSITIONS=232} [2020-10-11 16:53:52,387 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 232 predicate places. [2020-10-11 16:53:52,387 INFO L481 AbstractCegarLoop]: Abstraction has has 287 places, 232 transitions, 4543 flow [2020-10-11 16:53:52,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 16:53:52,387 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:52,388 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-11 16:53:52,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-11 16:53:52,588 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:52,589 INFO L82 PathProgramCache]: Analyzing trace with hash 381726017, now seen corresponding path program 27 times [2020-10-11 16:53:52,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:52,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897200480] [2020-10-11 16:53:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:52,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897200480] [2020-10-11 16:53:52,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174252365] [2020-10-11 16:53:52,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 16:53:52,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 16:53:52,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:52,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 16:53:52,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:52,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:52,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:52,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 16:53:52,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977421472] [2020-10-11 16:53:52,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:53:52,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:52,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:53:52,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:53:53,346 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:53,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 232 transitions, 4543 flow. Second operand 15 states. [2020-10-11 16:53:53,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:53,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:53,347 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:54,743 INFO L129 PetriNetUnfolder]: 445/2769 cut-off events. [2020-10-11 16:53:54,743 INFO L130 PetriNetUnfolder]: For 176875/177335 co-relation queries the response was YES. [2020-10-11 16:53:54,810 INFO L80 FinitePrefix]: Finished finitePrefix Result has 18136 conditions, 2769 events. 445/2769 cut-off events. For 176875/177335 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 27056 event pairs, 34 based on Foata normal form. 71/2680 useless extension candidates. Maximal degree in co-relation 18002. Up to 534 conditions per place. [2020-10-11 16:53:54,844 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 151 selfloop transitions, 28 changer transitions 26/256 dead transitions. [2020-10-11 16:53:54,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 256 transitions, 6396 flow [2020-10-11 16:53:54,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 16:53:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 16:53:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 863 transitions. [2020-10-11 16:53:54,846 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8258373205741627 [2020-10-11 16:53:54,846 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 863 transitions. [2020-10-11 16:53:54,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 863 transitions. [2020-10-11 16:53:54,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:54,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 863 transitions. [2020-10-11 16:53:54,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 16:53:54,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 16:53:54,850 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 16:53:54,850 INFO L185 Difference]: Start difference. First operand has 287 places, 232 transitions, 4543 flow. Second operand 19 states and 863 transitions. [2020-10-11 16:53:54,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 256 transitions, 6396 flow [2020-10-11 16:53:55,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 256 transitions, 6347 flow, removed 14 selfloop flow, removed 3 redundant places. [2020-10-11 16:53:55,185 INFO L241 Difference]: Finished difference. Result has 307 places, 218 transitions, 4216 flow [2020-10-11 16:53:55,185 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=4518, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4216, PETRI_PLACES=307, PETRI_TRANSITIONS=218} [2020-10-11 16:53:55,185 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 252 predicate places. [2020-10-11 16:53:55,185 INFO L481 AbstractCegarLoop]: Abstraction has has 307 places, 218 transitions, 4216 flow [2020-10-11 16:53:55,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:53:55,185 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:55,185 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-11 16:53:55,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-11 16:53:55,386 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:55,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:55,387 INFO L82 PathProgramCache]: Analyzing trace with hash -787600661, now seen corresponding path program 28 times [2020-10-11 16:53:55,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:55,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793432490] [2020-10-11 16:53:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:55,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793432490] [2020-10-11 16:53:55,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751799723] [2020-10-11 16:53:55,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:55,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:53:55,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:55,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 16:53:55,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:55,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:55,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:55,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:55,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 16:53:55,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681113563] [2020-10-11 16:53:55,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:53:55,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:55,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:53:55,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:53:56,094 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:56,095 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 218 transitions, 4216 flow. Second operand 16 states. [2020-10-11 16:53:56,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:56,095 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:56,096 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:57,494 INFO L129 PetriNetUnfolder]: 390/2493 cut-off events. [2020-10-11 16:53:57,494 INFO L130 PetriNetUnfolder]: For 170441/170897 co-relation queries the response was YES. [2020-10-11 16:53:57,526 INFO L80 FinitePrefix]: Finished finitePrefix Result has 16283 conditions, 2493 events. 390/2493 cut-off events. For 170441/170897 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 23793 event pairs, 0 based on Foata normal form. 84/2429 useless extension candidates. Maximal degree in co-relation 16142. Up to 422 conditions per place. [2020-10-11 16:53:57,549 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 131 selfloop transitions, 45 changer transitions 19/246 dead transitions. [2020-10-11 16:53:57,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 246 transitions, 6278 flow [2020-10-11 16:53:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 16:53:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-11 16:53:57,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1041 transitions. [2020-10-11 16:53:57,551 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8229249011857708 [2020-10-11 16:53:57,551 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1041 transitions. [2020-10-11 16:53:57,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1041 transitions. [2020-10-11 16:53:57,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:57,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1041 transitions. [2020-10-11 16:53:57,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-11 16:53:57,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-11 16:53:57,556 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-11 16:53:57,556 INFO L185 Difference]: Start difference. First operand has 307 places, 218 transitions, 4216 flow. Second operand 23 states and 1041 transitions. [2020-10-11 16:53:57,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 246 transitions, 6278 flow [2020-10-11 16:53:57,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 246 transitions, 5952 flow, removed 114 selfloop flow, removed 32 redundant places. [2020-10-11 16:53:57,885 INFO L241 Difference]: Finished difference. Result has 300 places, 214 transitions, 4102 flow [2020-10-11 16:53:57,885 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3954, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4102, PETRI_PLACES=300, PETRI_TRANSITIONS=214} [2020-10-11 16:53:57,886 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 245 predicate places. [2020-10-11 16:53:57,886 INFO L481 AbstractCegarLoop]: Abstraction has has 300 places, 214 transitions, 4102 flow [2020-10-11 16:53:57,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:53:57,886 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:57,886 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-11 16:53:58,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 16:53:58,103 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:58,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:58,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1770885335, now seen corresponding path program 29 times [2020-10-11 16:53:58,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:58,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654238457] [2020-10-11 16:53:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:58,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654238457] [2020-10-11 16:53:58,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124843775] [2020-10-11 16:53:58,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:58,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 16:53:58,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:58,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 16:53:58,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:58,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:58,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:58,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:58,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 16:53:58,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879248584] [2020-10-11 16:53:58,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:53:58,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:58,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:53:58,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:53:58,874 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:58,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 214 transitions, 4102 flow. Second operand 16 states. [2020-10-11 16:53:58,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:58,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:58,875 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:59,999 INFO L129 PetriNetUnfolder]: 359/2325 cut-off events. [2020-10-11 16:53:59,999 INFO L130 PetriNetUnfolder]: For 162450/162903 co-relation queries the response was YES. [2020-10-11 16:54:00,029 INFO L80 FinitePrefix]: Finished finitePrefix Result has 15173 conditions, 2325 events. 359/2325 cut-off events. For 162450/162903 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 21639 event pairs, 0 based on Foata normal form. 159/2344 useless extension candidates. Maximal degree in co-relation 15036. Up to 386 conditions per place. [2020-10-11 16:54:00,041 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 64 selfloop transitions, 97 changer transitions 31/243 dead transitions. [2020-10-11 16:54:00,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 243 transitions, 6318 flow [2020-10-11 16:54:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 16:54:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-11 16:54:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1225 transitions. [2020-10-11 16:54:00,043 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8249158249158249 [2020-10-11 16:54:00,043 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1225 transitions. [2020-10-11 16:54:00,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1225 transitions. [2020-10-11 16:54:00,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:00,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1225 transitions. [2020-10-11 16:54:00,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-11 16:54:00,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-11 16:54:00,048 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-11 16:54:00,048 INFO L185 Difference]: Start difference. First operand has 300 places, 214 transitions, 4102 flow. Second operand 27 states and 1225 transitions. [2020-10-11 16:54:00,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 243 transitions, 6318 flow [2020-10-11 16:54:00,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 243 transitions, 5934 flow, removed 136 selfloop flow, removed 29 redundant places. [2020-10-11 16:54:00,294 INFO L241 Difference]: Finished difference. Result has 299 places, 193 transitions, 3564 flow [2020-10-11 16:54:00,294 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3818, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3564, PETRI_PLACES=299, PETRI_TRANSITIONS=193} [2020-10-11 16:54:00,294 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 244 predicate places. [2020-10-11 16:54:00,295 INFO L481 AbstractCegarLoop]: Abstraction has has 299 places, 193 transitions, 3564 flow [2020-10-11 16:54:00,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:54:00,295 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:00,295 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-11 16:54:00,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 16:54:00,496 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:00,496 INFO L82 PathProgramCache]: Analyzing trace with hash -4184711, now seen corresponding path program 30 times [2020-10-11 16:54:00,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:00,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670064702] [2020-10-11 16:54:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:00,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670064702] [2020-10-11 16:54:00,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919835729] [2020-10-11 16:54:00,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:00,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 16:54:00,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:00,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 16:54:00,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:00,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:00,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:00,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 16:54:00,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110683592] [2020-10-11 16:54:00,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:54:00,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:00,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:54:00,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:54:00,984 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:00,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 193 transitions, 3564 flow. Second operand 15 states. [2020-10-11 16:54:00,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:00,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:00,985 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:01,881 INFO L129 PetriNetUnfolder]: 316/2056 cut-off events. [2020-10-11 16:54:01,881 INFO L130 PetriNetUnfolder]: For 149352/149819 co-relation queries the response was YES. [2020-10-11 16:54:01,902 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13688 conditions, 2056 events. 316/2056 cut-off events. For 149352/149819 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 18267 event pairs, 0 based on Foata normal form. 141/2071 useless extension candidates. Maximal degree in co-relation 13554. Up to 338 conditions per place. [2020-10-11 16:54:01,914 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 58 selfloop transitions, 109 changer transitions 8/226 dead transitions. [2020-10-11 16:54:01,914 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 226 transitions, 5961 flow [2020-10-11 16:54:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 16:54:01,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-11 16:54:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1181 transitions. [2020-10-11 16:54:01,920 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8258741258741259 [2020-10-11 16:54:01,920 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1181 transitions. [2020-10-11 16:54:01,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1181 transitions. [2020-10-11 16:54:01,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:01,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1181 transitions. [2020-10-11 16:54:01,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-11 16:54:01,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-11 16:54:01,923 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-11 16:54:01,924 INFO L185 Difference]: Start difference. First operand has 299 places, 193 transitions, 3564 flow. Second operand 26 states and 1181 transitions. [2020-10-11 16:54:01,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 226 transitions, 5961 flow [2020-10-11 16:54:02,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 226 transitions, 5251 flow, removed 182 selfloop flow, removed 48 redundant places. [2020-10-11 16:54:02,125 INFO L241 Difference]: Finished difference. Result has 280 places, 198 transitions, 3545 flow [2020-10-11 16:54:02,126 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3026, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3545, PETRI_PLACES=280, PETRI_TRANSITIONS=198} [2020-10-11 16:54:02,126 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 225 predicate places. [2020-10-11 16:54:02,126 INFO L481 AbstractCegarLoop]: Abstraction has has 280 places, 198 transitions, 3545 flow [2020-10-11 16:54:02,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:54:02,126 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:02,127 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-11 16:54:02,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:02,333 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:02,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:02,333 INFO L82 PathProgramCache]: Analyzing trace with hash -76389427, now seen corresponding path program 31 times [2020-10-11 16:54:02,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:02,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246996536] [2020-10-11 16:54:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:02,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246996536] [2020-10-11 16:54:02,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366903219] [2020-10-11 16:54:02,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:02,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 16:54:02,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:02,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:02,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:02,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 16:54:02,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071773997] [2020-10-11 16:54:02,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:54:02,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:02,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:54:02,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:54:03,152 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:03,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 198 transitions, 3545 flow. Second operand 15 states. [2020-10-11 16:54:03,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:03,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:03,154 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:04,045 INFO L129 PetriNetUnfolder]: 325/2168 cut-off events. [2020-10-11 16:54:04,045 INFO L130 PetriNetUnfolder]: For 157137/157708 co-relation queries the response was YES. [2020-10-11 16:54:04,074 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14138 conditions, 2168 events. 325/2168 cut-off events. For 157137/157708 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 19340 event pairs, 0 based on Foata normal form. 140/2173 useless extension candidates. Maximal degree in co-relation 14009. Up to 348 conditions per place. [2020-10-11 16:54:04,092 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 48 selfloop transitions, 127 changer transitions 10/236 dead transitions. [2020-10-11 16:54:04,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 236 transitions, 6131 flow [2020-10-11 16:54:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 16:54:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-11 16:54:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1276 transitions. [2020-10-11 16:54:04,095 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2020-10-11 16:54:04,095 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1276 transitions. [2020-10-11 16:54:04,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1276 transitions. [2020-10-11 16:54:04,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:04,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1276 transitions. [2020-10-11 16:54:04,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-11 16:54:04,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-11 16:54:04,099 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-11 16:54:04,099 INFO L185 Difference]: Start difference. First operand has 280 places, 198 transitions, 3545 flow. Second operand 28 states and 1276 transitions. [2020-10-11 16:54:04,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 236 transitions, 6131 flow [2020-10-11 16:54:04,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 236 transitions, 5625 flow, removed 155 selfloop flow, removed 23 redundant places. [2020-10-11 16:54:04,365 INFO L241 Difference]: Finished difference. Result has 288 places, 203 transitions, 3835 flow [2020-10-11 16:54:04,365 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3835, PETRI_PLACES=288, PETRI_TRANSITIONS=203} [2020-10-11 16:54:04,365 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 233 predicate places. [2020-10-11 16:54:04,366 INFO L481 AbstractCegarLoop]: Abstraction has has 288 places, 203 transitions, 3835 flow [2020-10-11 16:54:04,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:54:04,366 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:04,366 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-11 16:54:04,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-11 16:54:04,582 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:04,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:04,583 INFO L82 PathProgramCache]: Analyzing trace with hash -835881449, now seen corresponding path program 32 times [2020-10-11 16:54:04,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:04,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650548432] [2020-10-11 16:54:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:04,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650548432] [2020-10-11 16:54:04,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116702142] [2020-10-11 16:54:04,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:04,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:54:04,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:04,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 16:54:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:04,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:54:04,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:04,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:04,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 16:54:04,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243806735] [2020-10-11 16:54:04,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:54:04,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:04,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:54:04,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:54:05,093 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:05,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 203 transitions, 3835 flow. Second operand 16 states. [2020-10-11 16:54:05,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:05,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:05,094 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:06,142 INFO L129 PetriNetUnfolder]: 313/2126 cut-off events. [2020-10-11 16:54:06,143 INFO L130 PetriNetUnfolder]: For 163305/163812 co-relation queries the response was YES. [2020-10-11 16:54:06,173 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13952 conditions, 2126 events. 313/2126 cut-off events. For 163305/163812 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 19076 event pairs, 0 based on Foata normal form. 161/2158 useless extension candidates. Maximal degree in co-relation 13820. Up to 334 conditions per place. [2020-10-11 16:54:06,187 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 37 selfloop transitions, 101 changer transitions 43/232 dead transitions. [2020-10-11 16:54:06,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 232 transitions, 6293 flow [2020-10-11 16:54:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 16:54:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-11 16:54:06,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1317 transitions. [2020-10-11 16:54:06,194 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8257053291536051 [2020-10-11 16:54:06,194 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1317 transitions. [2020-10-11 16:54:06,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1317 transitions. [2020-10-11 16:54:06,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:06,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1317 transitions. [2020-10-11 16:54:06,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-11 16:54:06,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-11 16:54:06,199 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-11 16:54:06,199 INFO L185 Difference]: Start difference. First operand has 288 places, 203 transitions, 3835 flow. Second operand 29 states and 1317 transitions. [2020-10-11 16:54:06,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 232 transitions, 6293 flow [2020-10-11 16:54:06,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 232 transitions, 5413 flow, removed 342 selfloop flow, removed 23 redundant places. [2020-10-11 16:54:06,476 INFO L241 Difference]: Finished difference. Result has 295 places, 173 transitions, 3165 flow [2020-10-11 16:54:06,477 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3165, PETRI_PLACES=295, PETRI_TRANSITIONS=173} [2020-10-11 16:54:06,477 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 240 predicate places. [2020-10-11 16:54:06,477 INFO L481 AbstractCegarLoop]: Abstraction has has 295 places, 173 transitions, 3165 flow [2020-10-11 16:54:06,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:54:06,477 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:06,477 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-11 16:54:06,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-10-11 16:54:06,686 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:06,687 INFO L82 PathProgramCache]: Analyzing trace with hash 456839645, now seen corresponding path program 33 times [2020-10-11 16:54:06,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:06,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441397856] [2020-10-11 16:54:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:06,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441397856] [2020-10-11 16:54:06,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282060886] [2020-10-11 16:54:06,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:06,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 16:54:06,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:06,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 16:54:06,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:07,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:07,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:07,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:07,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-11 16:54:07,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146864950] [2020-10-11 16:54:07,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 16:54:07,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:07,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 16:54:07,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-11 16:54:07,365 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:07,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 173 transitions, 3165 flow. Second operand 17 states. [2020-10-11 16:54:07,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:07,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:07,366 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:08,375 INFO L129 PetriNetUnfolder]: 244/1663 cut-off events. [2020-10-11 16:54:08,375 INFO L130 PetriNetUnfolder]: For 114314/114586 co-relation queries the response was YES. [2020-10-11 16:54:08,408 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10726 conditions, 1663 events. 244/1663 cut-off events. For 114314/114586 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 13844 event pairs, 0 based on Foata normal form. 101/1665 useless extension candidates. Maximal degree in co-relation 10594. Up to 276 conditions per place. [2020-10-11 16:54:08,422 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 37 selfloop transitions, 107 changer transitions 5/200 dead transitions. [2020-10-11 16:54:08,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 200 transitions, 5371 flow [2020-10-11 16:54:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 16:54:08,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-11 16:54:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1359 transitions. [2020-10-11 16:54:08,424 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8236363636363636 [2020-10-11 16:54:08,425 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1359 transitions. [2020-10-11 16:54:08,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1359 transitions. [2020-10-11 16:54:08,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:08,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1359 transitions. [2020-10-11 16:54:08,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-11 16:54:08,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-11 16:54:08,429 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-11 16:54:08,429 INFO L185 Difference]: Start difference. First operand has 295 places, 173 transitions, 3165 flow. Second operand 30 states and 1359 transitions. [2020-10-11 16:54:08,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 200 transitions, 5371 flow [2020-10-11 16:54:08,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 200 transitions, 4023 flow, removed 456 selfloop flow, removed 67 redundant places. [2020-10-11 16:54:08,605 INFO L241 Difference]: Finished difference. Result has 257 places, 179 transitions, 2909 flow [2020-10-11 16:54:08,605 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2909, PETRI_PLACES=257, PETRI_TRANSITIONS=179} [2020-10-11 16:54:08,606 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 202 predicate places. [2020-10-11 16:54:08,606 INFO L481 AbstractCegarLoop]: Abstraction has has 257 places, 179 transitions, 2909 flow [2020-10-11 16:54:08,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 16:54:08,606 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:08,606 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:08,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:08,816 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:08,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:08,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1650038125, now seen corresponding path program 34 times [2020-10-11 16:54:08,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:08,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202509143] [2020-10-11 16:54:08,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 88 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:08,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202509143] [2020-10-11 16:54:08,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754768675] [2020-10-11 16:54:08,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:08,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:54:08,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:08,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:54:08,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 16:54:09,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 16:54:09,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 17 [2020-10-11 16:54:09,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281783787] [2020-10-11 16:54:09,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 16:54:09,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:09,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 16:54:09,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-11 16:54:09,211 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 55 [2020-10-11 16:54:09,212 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 179 transitions, 2909 flow. Second operand 13 states. [2020-10-11 16:54:09,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:09,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 55 [2020-10-11 16:54:09,212 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:10,434 INFO L129 PetriNetUnfolder]: 718/3866 cut-off events. [2020-10-11 16:54:10,434 INFO L130 PetriNetUnfolder]: For 148948/149132 co-relation queries the response was YES. [2020-10-11 16:54:10,542 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20595 conditions, 3866 events. 718/3866 cut-off events. For 148948/149132 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 41351 event pairs, 259 based on Foata normal form. 35/3763 useless extension candidates. Maximal degree in co-relation 20499. Up to 678 conditions per place. [2020-10-11 16:54:10,546 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 0 selfloop transitions, 0 changer transitions 167/167 dead transitions. [2020-10-11 16:54:10,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 167 transitions, 2160 flow [2020-10-11 16:54:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 16:54:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-11 16:54:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 839 transitions. [2020-10-11 16:54:10,550 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8474747474747475 [2020-10-11 16:54:10,550 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 839 transitions. [2020-10-11 16:54:10,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 839 transitions. [2020-10-11 16:54:10,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:10,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 839 transitions. [2020-10-11 16:54:10,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-11 16:54:10,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-11 16:54:10,554 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-11 16:54:10,554 INFO L185 Difference]: Start difference. First operand has 257 places, 179 transitions, 2909 flow. Second operand 18 states and 839 transitions. [2020-10-11 16:54:10,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 167 transitions, 2160 flow [2020-10-11 16:54:10,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 167 transitions, 1776 flow, removed 55 selfloop flow, removed 47 redundant places. [2020-10-11 16:54:10,913 INFO L241 Difference]: Finished difference. Result has 219 places, 0 transitions, 0 flow [2020-10-11 16:54:10,913 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=219, PETRI_TRANSITIONS=0} [2020-10-11 16:54:10,914 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 164 predicate places. [2020-10-11 16:54:10,914 INFO L481 AbstractCegarLoop]: Abstraction has has 219 places, 0 transitions, 0 flow [2020-10-11 16:54:10,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 16:54:11,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-11 16:54:11,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 04:54:11 BasicIcfg [2020-10-11 16:54:11,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 16:54:11,137 INFO L168 Benchmark]: Toolchain (without parser) took 60430.10 ms. Allocated memory was 253.2 MB in the beginning and 1.1 GB in the end (delta: 805.3 MB). Free memory was 209.0 MB in the beginning and 820.5 MB in the end (delta: -611.4 MB). Peak memory consumption was 790.9 MB. Max. memory is 14.2 GB. [2020-10-11 16:54:11,137 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 253.2 MB. Free memory is still 229.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 16:54:11,137 INFO L168 Benchmark]: CACSL2BoogieTranslator took 734.59 ms. Allocated memory was 253.2 MB in the beginning and 318.8 MB in the end (delta: 65.5 MB). Free memory was 209.0 MB in the beginning and 274.2 MB in the end (delta: -65.1 MB). Peak memory consumption was 30.9 MB. Max. memory is 14.2 GB. [2020-10-11 16:54:11,138 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.70 ms. Allocated memory is still 318.8 MB. Free memory is still 274.2 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 16:54:11,138 INFO L168 Benchmark]: Boogie Preprocessor took 27.48 ms. Allocated memory is still 318.8 MB. Free memory was 274.2 MB in the beginning and 271.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 16:54:11,138 INFO L168 Benchmark]: RCFGBuilder took 402.57 ms. Allocated memory is still 318.8 MB. Free memory was 271.6 MB in the beginning and 249.8 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-11 16:54:11,139 INFO L168 Benchmark]: TraceAbstraction took 59211.45 ms. Allocated memory was 318.8 MB in the beginning and 1.1 GB in the end (delta: 739.8 MB). Free memory was 249.8 MB in the beginning and 820.5 MB in the end (delta: -570.7 MB). Peak memory consumption was 766.2 MB. Max. memory is 14.2 GB. [2020-10-11 16:54:11,141 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 253.2 MB. Free memory is still 229.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 734.59 ms. Allocated memory was 253.2 MB in the beginning and 318.8 MB in the end (delta: 65.5 MB). Free memory was 209.0 MB in the beginning and 274.2 MB in the end (delta: -65.1 MB). Peak memory consumption was 30.9 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 47.70 ms. Allocated memory is still 318.8 MB. Free memory is still 274.2 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 27.48 ms. Allocated memory is still 318.8 MB. Free memory was 274.2 MB in the beginning and 271.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 402.57 ms. Allocated memory is still 318.8 MB. Free memory was 271.6 MB in the beginning and 249.8 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 59211.45 ms. Allocated memory was 318.8 MB in the beginning and 1.1 GB in the end (delta: 739.8 MB). Free memory was 249.8 MB in the beginning and 820.5 MB in the end (delta: -570.7 MB). Peak memory consumption was 766.2 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 59.0s, OverallIterations: 45, TraceHistogramMax: 7, AutomataDifference: 40.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 384 SDtfs, 1515 SDslu, 1515 SDs, 0 SdLazy, 7381 SolverSat, 1622 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3108 GetRequests, 2074 SyntacticMatches, 31 SemanticMatches, 1003 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5213 ImplicationChecksByTransitivity, 12.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5237occurred in iteration=36, 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: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 4364 NumberOfCodeBlocks, 4362 NumberOfCodeBlocksAsserted, 155 NumberOfCheckSat, 4280 ConstructedInterpolants, 0 QuantifiedInterpolants, 897562 SizeOfPredicates, 377 NumberOfNonLiveVariables, 4682 ConjunctsInSsa, 495 ConjunctsInUnsatCore, 84 InterpolantComputations, 8 PerfectInterpolantSequences, 388/2684 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...