/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-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 16:53:14,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 16:53:14,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 16:53:14,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 16:53:14,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 16:53:14,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 16:53:14,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 16:53:14,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 16:53:14,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 16:53:14,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 16:53:14,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 16:53:14,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 16:53:14,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 16:53:15,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 16:53:15,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 16:53:15,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 16:53:15,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 16:53:15,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 16:53:15,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 16:53:15,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 16:53:15,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 16:53:15,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 16:53:15,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 16:53:15,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 16:53:15,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 16:53:15,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 16:53:15,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 16:53:15,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 16:53:15,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 16:53:15,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 16:53:15,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 16:53:15,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 16:53:15,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 16:53:15,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 16:53:15,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 16:53:15,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 16:53:15,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 16:53:15,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 16:53:15,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 16:53:15,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 16:53:15,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 16:53:15,039 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 16:53:15,083 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 16:53:15,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 16:53:15,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 16:53:15,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 16:53:15,086 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 16:53:15,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 16:53:15,086 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 16:53:15,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 16:53:15,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 16:53:15,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 16:53:15,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 16:53:15,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 16:53:15,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 16:53:15,089 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 16:53:15,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 16:53:15,089 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 16:53:15,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 16:53:15,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 16:53:15,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 16:53:15,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 16:53:15,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 16:53:15,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 16:53:15,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 16:53:15,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 16:53:15,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 16:53:15,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 16:53:15,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 16:53:15,091 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 16:53:15,092 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 16:53:15,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 16:53:15,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 16:53:15,381 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 16:53:15,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 16:53:15,386 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 16:53:15,386 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 16:53:15,387 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-11 16:53:15,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c6bd1072/71599a6a0af64d5c8646c7a6fe570db2/FLAG8522d1067 [2020-10-11 16:53:15,980 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 16:53:15,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-11 16:53:15,995 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c6bd1072/71599a6a0af64d5c8646c7a6fe570db2/FLAG8522d1067 [2020-10-11 16:53:16,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c6bd1072/71599a6a0af64d5c8646c7a6fe570db2 [2020-10-11 16:53:16,269 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 16:53:16,271 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 16:53:16,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 16:53:16,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 16:53:16,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 16:53:16,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 04:53:16" (1/1) ... [2020-10-11 16:53:16,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c796de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:16, skipping insertion in model container [2020-10-11 16:53:16,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 04:53:16" (1/1) ... [2020-10-11 16:53:16,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 16:53:16,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 16:53:16,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 16:53:16,767 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 16:53:16,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 16:53:16,886 INFO L208 MainTranslator]: Completed translation [2020-10-11 16:53:16,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:16 WrapperNode [2020-10-11 16:53:16,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 16:53:16,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 16:53:16,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 16:53:16,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 16:53:16,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:16" (1/1) ... [2020-10-11 16:53:16,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:16" (1/1) ... [2020-10-11 16:53:16,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 16:53:16,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 16:53:16,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 16:53:16,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 16:53:16,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:16" (1/1) ... [2020-10-11 16:53:16,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:16" (1/1) ... [2020-10-11 16:53:16,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:16" (1/1) ... [2020-10-11 16:53:16,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:16" (1/1) ... [2020-10-11 16:53:16,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:16" (1/1) ... [2020-10-11 16:53:16,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:16" (1/1) ... [2020-10-11 16:53:16,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:16" (1/1) ... [2020-10-11 16:53:16,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 16:53:16,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 16:53:16,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 16:53:16,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 16:53:16,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:16" (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 16:53:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-11 16:53:17,047 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-11 16:53:17,047 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-11 16:53:17,047 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-11 16:53:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 16:53:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-11 16:53:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 16:53:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 16:53:17,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-11 16:53:17,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 16:53:17,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 16:53:17,050 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 16:53:17,409 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 16:53:17,409 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 16:53:17,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 04:53:17 BoogieIcfgContainer [2020-10-11 16:53:17,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 16:53:17,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 16:53:17,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 16:53:17,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 16:53:17,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 04:53:16" (1/3) ... [2020-10-11 16:53:17,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7addf1c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 04:53:17, skipping insertion in model container [2020-10-11 16:53:17,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:53:16" (2/3) ... [2020-10-11 16:53:17,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7addf1c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 04:53:17, skipping insertion in model container [2020-10-11 16:53:17,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 04:53:17" (3/3) ... [2020-10-11 16:53:17,420 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-11 16:53:17,430 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 16:53:17,435 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 16:53:17,437 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 16:53:17,462 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,462 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,462 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,463 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,463 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,463 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,464 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,464 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,464 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,465 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,465 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,465 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,465 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,466 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,466 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,466 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,466 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,467 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,467 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,467 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,467 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,468 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,468 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,468 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,469 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,469 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,469 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,469 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,473 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,473 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,473 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,474 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,474 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,474 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,480 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,480 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,480 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,481 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,481 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,481 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:53:17,499 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 16:53:17,520 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:53:17,520 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:53:17,520 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:53:17,521 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:53:17,521 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:53:17,521 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:53:17,521 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:53:17,521 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:53:17,534 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-11 16:53:17,571 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-11 16:53:17,571 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:53:17,577 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 16:53:17,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 120 flow [2020-10-11 16:53:17,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 53 transitions, 112 flow [2020-10-11 16:53:17,598 INFO L129 PetriNetUnfolder]: 4/43 cut-off events. [2020-10-11 16:53:17,598 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:53:17,599 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:17,600 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 16:53:17,600 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:17,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:17,606 INFO L82 PathProgramCache]: Analyzing trace with hash 305903693, now seen corresponding path program 1 times [2020-10-11 16:53:17,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:17,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199528205] [2020-10-11 16:53:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:17,990 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 16:53:17,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199528205] [2020-10-11 16:53:17,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:53:17,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-11 16:53:17,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099999893] [2020-10-11 16:53:18,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 16:53:18,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:18,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 16:53:18,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 16:53:18,085 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:18,087 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 112 flow. Second operand 6 states. [2020-10-11 16:53:18,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:18,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:18,090 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:18,268 INFO L129 PetriNetUnfolder]: 44/184 cut-off events. [2020-10-11 16:53:18,268 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:53:18,270 INFO L80 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 184 events. 44/184 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 742 event pairs, 3 based on Foata normal form. 46/211 useless extension candidates. Maximal degree in co-relation 239. Up to 29 conditions per place. [2020-10-11 16:53:18,273 INFO L132 encePairwiseOnDemand]: 44/55 looper letters, 11 selfloop transitions, 9 changer transitions 23/77 dead transitions. [2020-10-11 16:53:18,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 232 flow [2020-10-11 16:53:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 16:53:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-11 16:53:18,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 490 transitions. [2020-10-11 16:53:18,293 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8909090909090909 [2020-10-11 16:53:18,294 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 490 transitions. [2020-10-11 16:53:18,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 490 transitions. [2020-10-11 16:53:18,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:18,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 490 transitions. [2020-10-11 16:53:18,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-11 16:53:18,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-11 16:53:18,315 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-11 16:53:18,317 INFO L185 Difference]: Start difference. First operand has 55 places, 53 transitions, 112 flow. Second operand 10 states and 490 transitions. [2020-10-11 16:53:18,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 232 flow [2020-10-11 16:53:18,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:53:18,328 INFO L241 Difference]: Finished difference. Result has 69 places, 51 transitions, 155 flow [2020-10-11 16:53:18,332 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=155, PETRI_PLACES=69, PETRI_TRANSITIONS=51} [2020-10-11 16:53:18,333 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2020-10-11 16:53:18,333 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 51 transitions, 155 flow [2020-10-11 16:53:18,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 16:53:18,333 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:18,334 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 16:53:18,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 16:53:18,334 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:18,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:18,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1979459920, now seen corresponding path program 1 times [2020-10-11 16:53:18,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:18,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008387200] [2020-10-11 16:53:18,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:18,566 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 16:53:18,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008387200] [2020-10-11 16:53:18,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:53:18,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-11 16:53:18,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981271765] [2020-10-11 16:53:18,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 16:53:18,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:18,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 16:53:18,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-11 16:53:18,720 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:18,721 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 51 transitions, 155 flow. Second operand 6 states. [2020-10-11 16:53:18,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:18,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:18,721 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:18,815 INFO L129 PetriNetUnfolder]: 25/120 cut-off events. [2020-10-11 16:53:18,816 INFO L130 PetriNetUnfolder]: For 62/68 co-relation queries the response was YES. [2020-10-11 16:53:18,817 INFO L80 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 120 events. 25/120 cut-off events. For 62/68 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 363 event pairs, 0 based on Foata normal form. 5/112 useless extension candidates. Maximal degree in co-relation 201. Up to 29 conditions per place. [2020-10-11 16:53:18,818 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 13 selfloop transitions, 9 changer transitions 5/61 dead transitions. [2020-10-11 16:53:18,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 61 transitions, 251 flow [2020-10-11 16:53:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 16:53:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-11 16:53:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 324 transitions. [2020-10-11 16:53:18,821 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8415584415584415 [2020-10-11 16:53:18,821 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 324 transitions. [2020-10-11 16:53:18,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 324 transitions. [2020-10-11 16:53:18,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:18,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 324 transitions. [2020-10-11 16:53:18,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-11 16:53:18,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-11 16:53:18,825 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-11 16:53:18,826 INFO L185 Difference]: Start difference. First operand has 69 places, 51 transitions, 155 flow. Second operand 7 states and 324 transitions. [2020-10-11 16:53:18,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 61 transitions, 251 flow [2020-10-11 16:53:18,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 61 transitions, 243 flow, removed 4 selfloop flow, removed 4 redundant places. [2020-10-11 16:53:18,831 INFO L241 Difference]: Finished difference. Result has 63 places, 54 transitions, 194 flow [2020-10-11 16:53:18,832 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=194, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2020-10-11 16:53:18,833 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2020-10-11 16:53:18,833 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 194 flow [2020-10-11 16:53:18,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 16:53:18,833 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:18,833 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:18,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 16:53:18,834 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:18,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:18,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1106394582, now seen corresponding path program 1 times [2020-10-11 16:53:18,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:18,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214987928] [2020-10-11 16:53:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:18,963 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 16:53:18,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214987928] [2020-10-11 16:53:18,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:53:18,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-11 16:53:18,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997997065] [2020-10-11 16:53:18,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 16:53:18,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:18,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 16:53:18,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 16:53:19,100 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:19,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 194 flow. Second operand 6 states. [2020-10-11 16:53:19,100 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:19,101 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:19,101 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:19,188 INFO L129 PetriNetUnfolder]: 35/179 cut-off events. [2020-10-11 16:53:19,188 INFO L130 PetriNetUnfolder]: For 107/120 co-relation queries the response was YES. [2020-10-11 16:53:19,191 INFO L80 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 179 events. 35/179 cut-off events. For 107/120 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 663 event pairs, 0 based on Foata normal form. 16/176 useless extension candidates. Maximal degree in co-relation 320. Up to 33 conditions per place. [2020-10-11 16:53:19,192 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 20 selfloop transitions, 11 changer transitions 8/73 dead transitions. [2020-10-11 16:53:19,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 73 transitions, 374 flow [2020-10-11 16:53:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 16:53:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-11 16:53:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 419 transitions. [2020-10-11 16:53:19,195 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8464646464646465 [2020-10-11 16:53:19,195 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 419 transitions. [2020-10-11 16:53:19,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 419 transitions. [2020-10-11 16:53:19,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:19,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 419 transitions. [2020-10-11 16:53:19,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-11 16:53:19,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-11 16:53:19,199 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-11 16:53:19,199 INFO L185 Difference]: Start difference. First operand has 63 places, 54 transitions, 194 flow. Second operand 9 states and 419 transitions. [2020-10-11 16:53:19,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 73 transitions, 374 flow [2020-10-11 16:53:19,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 351 flow, removed 9 selfloop flow, removed 3 redundant places. [2020-10-11 16:53:19,204 INFO L241 Difference]: Finished difference. Result has 73 places, 59 transitions, 263 flow [2020-10-11 16:53:19,205 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=263, PETRI_PLACES=73, PETRI_TRANSITIONS=59} [2020-10-11 16:53:19,205 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2020-10-11 16:53:19,205 INFO L481 AbstractCegarLoop]: Abstraction has has 73 places, 59 transitions, 263 flow [2020-10-11 16:53:19,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 16:53:19,206 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:19,206 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 16:53:19,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 16:53:19,206 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:19,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1083307030, now seen corresponding path program 2 times [2020-10-11 16:53:19,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:19,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295761081] [2020-10-11 16:53:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:19,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295761081] [2020-10-11 16:53:19,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:53:19,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-11 16:53:19,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227745723] [2020-10-11 16:53:19,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 16:53:19,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:19,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 16:53:19,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-11 16:53:19,477 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:19,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 59 transitions, 263 flow. Second operand 6 states. [2020-10-11 16:53:19,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:19,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:19,478 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:19,639 INFO L129 PetriNetUnfolder]: 32/182 cut-off events. [2020-10-11 16:53:19,640 INFO L130 PetriNetUnfolder]: For 254/289 co-relation queries the response was YES. [2020-10-11 16:53:19,641 INFO L80 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 182 events. 32/182 cut-off events. For 254/289 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 711 event pairs, 0 based on Foata normal form. 28/192 useless extension candidates. Maximal degree in co-relation 382. Up to 35 conditions per place. [2020-10-11 16:53:19,643 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 18 selfloop transitions, 15 changer transitions 11/78 dead transitions. [2020-10-11 16:53:19,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 78 transitions, 500 flow [2020-10-11 16:53:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 16:53:19,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-11 16:53:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 462 transitions. [2020-10-11 16:53:19,646 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.84 [2020-10-11 16:53:19,646 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 462 transitions. [2020-10-11 16:53:19,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 462 transitions. [2020-10-11 16:53:19,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:19,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 462 transitions. [2020-10-11 16:53:19,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-11 16:53:19,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-11 16:53:19,650 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-11 16:53:19,650 INFO L185 Difference]: Start difference. First operand has 73 places, 59 transitions, 263 flow. Second operand 10 states and 462 transitions. [2020-10-11 16:53:19,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 78 transitions, 500 flow [2020-10-11 16:53:19,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 475 flow, removed 8 selfloop flow, removed 3 redundant places. [2020-10-11 16:53:19,657 INFO L241 Difference]: Finished difference. Result has 82 places, 64 transitions, 344 flow [2020-10-11 16:53:19,657 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=344, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2020-10-11 16:53:19,657 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2020-10-11 16:53:19,657 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 344 flow [2020-10-11 16:53:19,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 16:53:19,658 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:19,658 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 16:53:19,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 16:53:19,658 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:19,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:19,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2052585901, now seen corresponding path program 1 times [2020-10-11 16:53:19,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:19,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542175359] [2020-10-11 16:53:19,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:19,750 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 16:53:19,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542175359] [2020-10-11 16:53:19,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:53:19,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-11 16:53:19,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261394006] [2020-10-11 16:53:19,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 16:53:19,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:19,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 16:53:19,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-11 16:53:19,841 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:19,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 64 transitions, 344 flow. Second operand 7 states. [2020-10-11 16:53:19,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:19,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:19,842 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:19,978 INFO L129 PetriNetUnfolder]: 45/252 cut-off events. [2020-10-11 16:53:19,979 INFO L130 PetriNetUnfolder]: For 526/556 co-relation queries the response was YES. [2020-10-11 16:53:19,981 INFO L80 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 252 events. 45/252 cut-off events. For 526/556 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1142 event pairs, 0 based on Foata normal form. 20/247 useless extension candidates. Maximal degree in co-relation 562. Up to 53 conditions per place. [2020-10-11 16:53:19,984 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 23 selfloop transitions, 23 changer transitions 8/88 dead transitions. [2020-10-11 16:53:19,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 88 transitions, 664 flow [2020-10-11 16:53:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 16:53:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-11 16:53:19,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 510 transitions. [2020-10-11 16:53:19,987 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8429752066115702 [2020-10-11 16:53:19,987 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 510 transitions. [2020-10-11 16:53:19,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 510 transitions. [2020-10-11 16:53:19,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:19,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 510 transitions. [2020-10-11 16:53:19,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-11 16:53:19,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-11 16:53:19,991 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-11 16:53:19,992 INFO L185 Difference]: Start difference. First operand has 82 places, 64 transitions, 344 flow. Second operand 11 states and 510 transitions. [2020-10-11 16:53:19,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 88 transitions, 664 flow [2020-10-11 16:53:19,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 88 transitions, 617 flow, removed 19 selfloop flow, removed 5 redundant places. [2020-10-11 16:53:19,999 INFO L241 Difference]: Finished difference. Result has 91 places, 70 transitions, 459 flow [2020-10-11 16:53:19,999 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=459, PETRI_PLACES=91, PETRI_TRANSITIONS=70} [2020-10-11 16:53:20,000 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2020-10-11 16:53:20,000 INFO L481 AbstractCegarLoop]: Abstraction has has 91 places, 70 transitions, 459 flow [2020-10-11 16:53:20,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 16:53:20,000 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:20,000 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 16:53:20,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-11 16:53:20,001 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:20,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:20,002 INFO L82 PathProgramCache]: Analyzing trace with hash -13306963, now seen corresponding path program 2 times [2020-10-11 16:53:20,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:20,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626348657] [2020-10-11 16:53:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:20,102 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 16:53:20,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626348657] [2020-10-11 16:53:20,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:53:20,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-11 16:53:20,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903019216] [2020-10-11 16:53:20,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 16:53:20,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:20,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 16:53:20,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-11 16:53:20,278 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:20,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 70 transitions, 459 flow. Second operand 7 states. [2020-10-11 16:53:20,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:20,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:20,279 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:20,432 INFO L129 PetriNetUnfolder]: 39/223 cut-off events. [2020-10-11 16:53:20,432 INFO L130 PetriNetUnfolder]: For 1020/1061 co-relation queries the response was YES. [2020-10-11 16:53:20,434 INFO L80 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 223 events. 39/223 cut-off events. For 1020/1061 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 945 event pairs, 0 based on Foata normal form. 25/225 useless extension candidates. Maximal degree in co-relation 628. Up to 49 conditions per place. [2020-10-11 16:53:20,436 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 21 selfloop transitions, 23 changer transitions 11/89 dead transitions. [2020-10-11 16:53:20,436 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 89 transitions, 838 flow [2020-10-11 16:53:20,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 16:53:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-11 16:53:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 504 transitions. [2020-10-11 16:53:20,439 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8330578512396695 [2020-10-11 16:53:20,439 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 504 transitions. [2020-10-11 16:53:20,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 504 transitions. [2020-10-11 16:53:20,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:20,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 504 transitions. [2020-10-11 16:53:20,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-11 16:53:20,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-11 16:53:20,443 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-11 16:53:20,443 INFO L185 Difference]: Start difference. First operand has 91 places, 70 transitions, 459 flow. Second operand 11 states and 504 transitions. [2020-10-11 16:53:20,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 89 transitions, 838 flow [2020-10-11 16:53:20,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 89 transitions, 775 flow, removed 22 selfloop flow, removed 5 redundant places. [2020-10-11 16:53:20,451 INFO L241 Difference]: Finished difference. Result has 98 places, 72 transitions, 529 flow [2020-10-11 16:53:20,452 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=529, PETRI_PLACES=98, PETRI_TRANSITIONS=72} [2020-10-11 16:53:20,452 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2020-10-11 16:53:20,452 INFO L481 AbstractCegarLoop]: Abstraction has has 98 places, 72 transitions, 529 flow [2020-10-11 16:53:20,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 16:53:20,453 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:20,453 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 16:53:20,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-11 16:53:20,453 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:20,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:20,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1408160079, now seen corresponding path program 1 times [2020-10-11 16:53:20,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:20,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175435952] [2020-10-11 16:53:20,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:20,564 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 16:53:20,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175435952] [2020-10-11 16:53:20,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796886740] [2020-10-11 16:53:20,565 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 16:53:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:20,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 16:53:20,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:20,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:20,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:20,782 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 16:53:20,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:20,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-10-11 16:53:20,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546176199] [2020-10-11 16:53:20,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 16:53:20,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 16:53:20,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 16:53:21,102 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:21,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 72 transitions, 529 flow. Second operand 10 states. [2020-10-11 16:53:21,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:21,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:21,104 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:21,318 INFO L129 PetriNetUnfolder]: 46/241 cut-off events. [2020-10-11 16:53:21,319 INFO L130 PetriNetUnfolder]: For 1396/1440 co-relation queries the response was YES. [2020-10-11 16:53:21,321 INFO L80 FinitePrefix]: Finished finitePrefix Result has 819 conditions, 241 events. 46/241 cut-off events. For 1396/1440 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1055 event pairs, 0 based on Foata normal form. 25/243 useless extension candidates. Maximal degree in co-relation 766. Up to 57 conditions per place. [2020-10-11 16:53:21,323 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 20 selfloop transitions, 35 changer transitions 11/100 dead transitions. [2020-10-11 16:53:21,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 100 transitions, 1105 flow [2020-10-11 16:53:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 16:53:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-11 16:53:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 733 transitions. [2020-10-11 16:53:21,326 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8329545454545455 [2020-10-11 16:53:21,327 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 733 transitions. [2020-10-11 16:53:21,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 733 transitions. [2020-10-11 16:53:21,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:21,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 733 transitions. [2020-10-11 16:53:21,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-11 16:53:21,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-11 16:53:21,332 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-11 16:53:21,332 INFO L185 Difference]: Start difference. First operand has 98 places, 72 transitions, 529 flow. Second operand 16 states and 733 transitions. [2020-10-11 16:53:21,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 100 transitions, 1105 flow [2020-10-11 16:53:21,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 100 transitions, 988 flow, removed 38 selfloop flow, removed 10 redundant places. [2020-10-11 16:53:21,343 INFO L241 Difference]: Finished difference. Result has 108 places, 83 transitions, 753 flow [2020-10-11 16:53:21,343 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=753, PETRI_PLACES=108, PETRI_TRANSITIONS=83} [2020-10-11 16:53:21,344 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2020-10-11 16:53:21,344 INFO L481 AbstractCegarLoop]: Abstraction has has 108 places, 83 transitions, 753 flow [2020-10-11 16:53:21,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 16:53:21,344 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:21,344 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 16:53:21,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-11 16:53:21,558 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1572064828, now seen corresponding path program 1 times [2020-10-11 16:53:21,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:21,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313567041] [2020-10-11 16:53:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:21,660 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 16:53:21,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313567041] [2020-10-11 16:53:21,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943254377] [2020-10-11 16:53:21,661 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 16:53:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:21,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 16:53:21,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:21,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:21,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:21,791 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 16:53:21,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:21,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-11 16:53:21,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164058166] [2020-10-11 16:53:21,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:53:21,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:21,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:53:21,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:53:21,892 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:21,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 83 transitions, 753 flow. Second operand 11 states. [2020-10-11 16:53:21,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:21,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:21,894 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:22,223 INFO L129 PetriNetUnfolder]: 68/377 cut-off events. [2020-10-11 16:53:22,224 INFO L130 PetriNetUnfolder]: For 2722/2778 co-relation queries the response was YES. [2020-10-11 16:53:22,226 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1345 conditions, 377 events. 68/377 cut-off events. For 2722/2778 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1931 event pairs, 0 based on Foata normal form. 30/369 useless extension candidates. Maximal degree in co-relation 1288. Up to 89 conditions per place. [2020-10-11 16:53:22,230 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 37 selfloop transitions, 47 changer transitions 14/132 dead transitions. [2020-10-11 16:53:22,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 132 transitions, 1782 flow [2020-10-11 16:53:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 16:53:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-11 16:53:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 962 transitions. [2020-10-11 16:53:22,234 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8329004329004329 [2020-10-11 16:53:22,234 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 962 transitions. [2020-10-11 16:53:22,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 962 transitions. [2020-10-11 16:53:22,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:22,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 962 transitions. [2020-10-11 16:53:22,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-11 16:53:22,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-11 16:53:22,241 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-11 16:53:22,241 INFO L185 Difference]: Start difference. First operand has 108 places, 83 transitions, 753 flow. Second operand 21 states and 962 transitions. [2020-10-11 16:53:22,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 132 transitions, 1782 flow [2020-10-11 16:53:22,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 132 transitions, 1435 flow, removed 155 selfloop flow, removed 11 redundant places. [2020-10-11 16:53:22,256 INFO L241 Difference]: Finished difference. Result has 124 places, 110 transitions, 1111 flow [2020-10-11 16:53:22,256 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1111, PETRI_PLACES=124, PETRI_TRANSITIONS=110} [2020-10-11 16:53:22,257 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2020-10-11 16:53:22,257 INFO L481 AbstractCegarLoop]: Abstraction has has 124 places, 110 transitions, 1111 flow [2020-10-11 16:53:22,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:53:22,257 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:22,257 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 16:53:22,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:22,472 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:22,473 INFO L82 PathProgramCache]: Analyzing trace with hash 374572198, now seen corresponding path program 2 times [2020-10-11 16:53:22,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:22,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344980488] [2020-10-11 16:53:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:22,607 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 16:53:22,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344980488] [2020-10-11 16:53:22,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636252674] [2020-10-11 16:53:22,607 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 16:53:22,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:53:22,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:22,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:53:22,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:22,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:22,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:22,711 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 16:53:22,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:22,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 16:53:22,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639713134] [2020-10-11 16:53:22,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:53:22,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:22,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:53:22,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:53:23,015 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:23,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 110 transitions, 1111 flow. Second operand 11 states. [2020-10-11 16:53:23,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:23,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:23,017 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:23,321 INFO L129 PetriNetUnfolder]: 70/402 cut-off events. [2020-10-11 16:53:23,322 INFO L130 PetriNetUnfolder]: For 3969/4037 co-relation queries the response was YES. [2020-10-11 16:53:23,325 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 402 events. 70/402 cut-off events. For 3969/4037 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2117 event pairs, 0 based on Foata normal form. 34/396 useless extension candidates. Maximal degree in co-relation 1425. Up to 85 conditions per place. [2020-10-11 16:53:23,329 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 36 selfloop transitions, 55 changer transitions 8/133 dead transitions. [2020-10-11 16:53:23,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 133 transitions, 1811 flow [2020-10-11 16:53:23,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 16:53:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-11 16:53:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 732 transitions. [2020-10-11 16:53:23,333 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8318181818181818 [2020-10-11 16:53:23,333 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 732 transitions. [2020-10-11 16:53:23,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 732 transitions. [2020-10-11 16:53:23,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:23,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 732 transitions. [2020-10-11 16:53:23,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-11 16:53:23,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-11 16:53:23,338 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-11 16:53:23,338 INFO L185 Difference]: Start difference. First operand has 124 places, 110 transitions, 1111 flow. Second operand 16 states and 732 transitions. [2020-10-11 16:53:23,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 133 transitions, 1811 flow [2020-10-11 16:53:23,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 133 transitions, 1554 flow, removed 113 selfloop flow, removed 13 redundant places. [2020-10-11 16:53:23,358 INFO L241 Difference]: Finished difference. Result has 128 places, 116 transitions, 1195 flow [2020-10-11 16:53:23,358 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1195, PETRI_PLACES=128, PETRI_TRANSITIONS=116} [2020-10-11 16:53:23,359 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2020-10-11 16:53:23,359 INFO L481 AbstractCegarLoop]: Abstraction has has 128 places, 116 transitions, 1195 flow [2020-10-11 16:53:23,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:53:23,359 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:23,359 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 16:53:23,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:23,573 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:23,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:23,573 INFO L82 PathProgramCache]: Analyzing trace with hash 796537721, now seen corresponding path program 3 times [2020-10-11 16:53:23,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:23,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882103512] [2020-10-11 16:53:23,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:23,760 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 16:53:23,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882103512] [2020-10-11 16:53:23,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778489106] [2020-10-11 16:53:23,761 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 16:53:23,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 16:53:23,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:53:23,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:23,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:23,874 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 16:53:23,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:23,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 16:53:23,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876166811] [2020-10-11 16:53:23,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:53:23,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:23,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:53:23,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:53:24,182 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:24,183 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 116 transitions, 1195 flow. Second operand 11 states. [2020-10-11 16:53:24,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:24,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:24,183 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:24,437 INFO L129 PetriNetUnfolder]: 82/517 cut-off events. [2020-10-11 16:53:24,438 INFO L130 PetriNetUnfolder]: For 5132/5190 co-relation queries the response was YES. [2020-10-11 16:53:24,442 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 517 events. 82/517 cut-off events. For 5132/5190 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3003 event pairs, 0 based on Foata normal form. 34/494 useless extension candidates. Maximal degree in co-relation 1800. Up to 87 conditions per place. [2020-10-11 16:53:24,446 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 64 selfloop transitions, 41 changer transitions 8/147 dead transitions. [2020-10-11 16:53:24,446 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 147 transitions, 2044 flow [2020-10-11 16:53:24,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 16:53:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-11 16:53:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 686 transitions. [2020-10-11 16:53:24,449 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8315151515151515 [2020-10-11 16:53:24,449 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 686 transitions. [2020-10-11 16:53:24,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 686 transitions. [2020-10-11 16:53:24,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:24,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 686 transitions. [2020-10-11 16:53:24,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-11 16:53:24,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-11 16:53:24,453 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-11 16:53:24,454 INFO L185 Difference]: Start difference. First operand has 128 places, 116 transitions, 1195 flow. Second operand 15 states and 686 transitions. [2020-10-11 16:53:24,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 147 transitions, 2044 flow [2020-10-11 16:53:24,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 147 transitions, 1864 flow, removed 57 selfloop flow, removed 11 redundant places. [2020-10-11 16:53:24,475 INFO L241 Difference]: Finished difference. Result has 135 places, 128 transitions, 1392 flow [2020-10-11 16:53:24,476 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1392, PETRI_PLACES=135, PETRI_TRANSITIONS=128} [2020-10-11 16:53:24,476 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2020-10-11 16:53:24,476 INFO L481 AbstractCegarLoop]: Abstraction has has 135 places, 128 transitions, 1392 flow [2020-10-11 16:53:24,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:53:24,477 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:24,477 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 16:53:24,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:24,691 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:24,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:24,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1894189139, now seen corresponding path program 4 times [2020-10-11 16:53:24,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:24,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493931578] [2020-10-11 16:53:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:24,820 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 16:53:24,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493931578] [2020-10-11 16:53:24,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361836739] [2020-10-11 16:53:24,821 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 16:53:24,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:53:24,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:53:24,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:24,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:24,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:24,916 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 16:53:24,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:24,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 16:53:24,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814738019] [2020-10-11 16:53:24,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 16:53:24,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:24,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 16:53:24,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-11 16:53:24,995 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:24,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 128 transitions, 1392 flow. Second operand 12 states. [2020-10-11 16:53:24,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:24,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:24,996 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:25,398 INFO L129 PetriNetUnfolder]: 96/643 cut-off events. [2020-10-11 16:53:25,398 INFO L130 PetriNetUnfolder]: For 6964/7027 co-relation queries the response was YES. [2020-10-11 16:53:25,403 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2323 conditions, 643 events. 96/643 cut-off events. For 6964/7027 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4251 event pairs, 0 based on Foata normal form. 37/611 useless extension candidates. Maximal degree in co-relation 2257. Up to 107 conditions per place. [2020-10-11 16:53:25,409 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 57 selfloop transitions, 64 changer transitions 8/163 dead transitions. [2020-10-11 16:53:25,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 163 transitions, 2401 flow [2020-10-11 16:53:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 16:53:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 16:53:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 866 transitions. [2020-10-11 16:53:25,412 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8287081339712918 [2020-10-11 16:53:25,412 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 866 transitions. [2020-10-11 16:53:25,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 866 transitions. [2020-10-11 16:53:25,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:25,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 866 transitions. [2020-10-11 16:53:25,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 16:53:25,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 16:53:25,418 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 16:53:25,418 INFO L185 Difference]: Start difference. First operand has 135 places, 128 transitions, 1392 flow. Second operand 19 states and 866 transitions. [2020-10-11 16:53:25,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 163 transitions, 2401 flow [2020-10-11 16:53:25,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 163 transitions, 2157 flow, removed 94 selfloop flow, removed 10 redundant places. [2020-10-11 16:53:25,443 INFO L241 Difference]: Finished difference. Result has 148 places, 143 transitions, 1749 flow [2020-10-11 16:53:25,443 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1749, PETRI_PLACES=148, PETRI_TRANSITIONS=143} [2020-10-11 16:53:25,444 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2020-10-11 16:53:25,444 INFO L481 AbstractCegarLoop]: Abstraction has has 148 places, 143 transitions, 1749 flow [2020-10-11 16:53:25,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 16:53:25,444 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:25,444 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 16:53:25,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-11 16:53:25,660 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:25,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:25,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1612352419, now seen corresponding path program 5 times [2020-10-11 16:53:25,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:25,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573872442] [2020-10-11 16:53:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:25,771 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 16:53:25,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573872442] [2020-10-11 16:53:25,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493254000] [2020-10-11 16:53:25,772 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 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 16:53:25,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 16:53:25,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:25,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:53:25,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:25,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:25,857 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 16:53:25,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:25,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 16:53:25,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681229140] [2020-10-11 16:53:25,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:53:25,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:25,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:53:25,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:53:25,931 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:25,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 143 transitions, 1749 flow. Second operand 11 states. [2020-10-11 16:53:25,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:25,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:25,932 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:26,251 INFO L129 PetriNetUnfolder]: 108/716 cut-off events. [2020-10-11 16:53:26,251 INFO L130 PetriNetUnfolder]: For 7077/7165 co-relation queries the response was YES. [2020-10-11 16:53:26,257 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 716 events. 108/716 cut-off events. For 7077/7165 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4938 event pairs, 0 based on Foata normal form. 44/684 useless extension candidates. Maximal degree in co-relation 2543. Up to 123 conditions per place. [2020-10-11 16:53:26,263 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 47 selfloop transitions, 88 changer transitions 8/177 dead transitions. [2020-10-11 16:53:26,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 177 transitions, 2762 flow [2020-10-11 16:53:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 16:53:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-11 16:53:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 821 transitions. [2020-10-11 16:53:26,265 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8292929292929293 [2020-10-11 16:53:26,265 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 821 transitions. [2020-10-11 16:53:26,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 821 transitions. [2020-10-11 16:53:26,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:26,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 821 transitions. [2020-10-11 16:53:26,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-11 16:53:26,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-11 16:53:26,269 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-11 16:53:26,269 INFO L185 Difference]: Start difference. First operand has 148 places, 143 transitions, 1749 flow. Second operand 18 states and 821 transitions. [2020-10-11 16:53:26,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 177 transitions, 2762 flow [2020-10-11 16:53:26,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 177 transitions, 2518 flow, removed 82 selfloop flow, removed 14 redundant places. [2020-10-11 16:53:26,299 INFO L241 Difference]: Finished difference. Result has 155 places, 158 transitions, 2084 flow [2020-10-11 16:53:26,300 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2084, PETRI_PLACES=155, PETRI_TRANSITIONS=158} [2020-10-11 16:53:26,300 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 100 predicate places. [2020-10-11 16:53:26,300 INFO L481 AbstractCegarLoop]: Abstraction has has 155 places, 158 transitions, 2084 flow [2020-10-11 16:53:26,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:53:26,301 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:26,301 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 16:53:26,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:26,516 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:26,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:26,516 INFO L82 PathProgramCache]: Analyzing trace with hash -271931561, now seen corresponding path program 6 times [2020-10-11 16:53:26,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:26,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270737490] [2020-10-11 16:53:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:26,631 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 16:53:26,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270737490] [2020-10-11 16:53:26,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923774849] [2020-10-11 16:53:26,632 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 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 16:53:26,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 16:53:26,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:26,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:53:26,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:26,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:26,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:26,730 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 16:53:26,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:26,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 16:53:26,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677521680] [2020-10-11 16:53:26,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 16:53:26,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:26,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 16:53:26,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-11 16:53:27,136 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:27,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 158 transitions, 2084 flow. Second operand 12 states. [2020-10-11 16:53:27,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:27,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:27,137 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:27,630 INFO L129 PetriNetUnfolder]: 114/763 cut-off events. [2020-10-11 16:53:27,631 INFO L130 PetriNetUnfolder]: For 8495/8602 co-relation queries the response was YES. [2020-10-11 16:53:27,639 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2907 conditions, 763 events. 114/763 cut-off events. For 8495/8602 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5477 event pairs, 0 based on Foata normal form. 55/739 useless extension candidates. Maximal degree in co-relation 2833. Up to 129 conditions per place. [2020-10-11 16:53:27,648 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 41 selfloop transitions, 102 changer transitions 8/185 dead transitions. [2020-10-11 16:53:27,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 185 transitions, 3076 flow [2020-10-11 16:53:27,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 16:53:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-11 16:53:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 958 transitions. [2020-10-11 16:53:27,652 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8294372294372294 [2020-10-11 16:53:27,652 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 958 transitions. [2020-10-11 16:53:27,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 958 transitions. [2020-10-11 16:53:27,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:27,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 958 transitions. [2020-10-11 16:53:27,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-11 16:53:27,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-11 16:53:27,658 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-11 16:53:27,658 INFO L185 Difference]: Start difference. First operand has 155 places, 158 transitions, 2084 flow. Second operand 21 states and 958 transitions. [2020-10-11 16:53:27,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 185 transitions, 3076 flow [2020-10-11 16:53:27,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 185 transitions, 2768 flow, removed 96 selfloop flow, removed 13 redundant places. [2020-10-11 16:53:27,712 INFO L241 Difference]: Finished difference. Result has 165 places, 165 transitions, 2284 flow [2020-10-11 16:53:27,712 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2284, PETRI_PLACES=165, PETRI_TRANSITIONS=165} [2020-10-11 16:53:27,713 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2020-10-11 16:53:27,713 INFO L481 AbstractCegarLoop]: Abstraction has has 165 places, 165 transitions, 2284 flow [2020-10-11 16:53:27,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 16:53:27,713 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:27,713 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 16:53:27,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:27,928 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:27,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:27,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1460691187, now seen corresponding path program 7 times [2020-10-11 16:53:27,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:27,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053192141] [2020-10-11 16:53:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:28,064 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 16:53:28,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053192141] [2020-10-11 16:53:28,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141232280] [2020-10-11 16:53:28,064 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 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 16:53:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:28,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:53:28,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:28,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:28,146 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 16:53:28,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:28,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 16:53:28,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760817408] [2020-10-11 16:53:28,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 16:53:28,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:28,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 16:53:28,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-11 16:53:28,219 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:28,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 165 transitions, 2284 flow. Second operand 11 states. [2020-10-11 16:53:28,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:28,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:28,219 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:28,649 INFO L129 PetriNetUnfolder]: 131/856 cut-off events. [2020-10-11 16:53:28,649 INFO L130 PetriNetUnfolder]: For 10611/10748 co-relation queries the response was YES. [2020-10-11 16:53:28,657 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3404 conditions, 856 events. 131/856 cut-off events. For 10611/10748 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6191 event pairs, 0 based on Foata normal form. 58/824 useless extension candidates. Maximal degree in co-relation 3327. Up to 149 conditions per place. [2020-10-11 16:53:28,665 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 45 selfloop transitions, 111 changer transitions 8/198 dead transitions. [2020-10-11 16:53:28,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 198 transitions, 3444 flow [2020-10-11 16:53:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 16:53:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-11 16:53:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 917 transitions. [2020-10-11 16:53:28,668 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8336363636363636 [2020-10-11 16:53:28,668 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 917 transitions. [2020-10-11 16:53:28,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 917 transitions. [2020-10-11 16:53:28,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:28,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 917 transitions. [2020-10-11 16:53:28,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-11 16:53:28,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-11 16:53:28,672 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-11 16:53:28,672 INFO L185 Difference]: Start difference. First operand has 165 places, 165 transitions, 2284 flow. Second operand 20 states and 917 transitions. [2020-10-11 16:53:28,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 198 transitions, 3444 flow [2020-10-11 16:53:28,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 198 transitions, 3072 flow, removed 105 selfloop flow, removed 17 redundant places. [2020-10-11 16:53:28,717 INFO L241 Difference]: Finished difference. Result has 171 places, 174 transitions, 2516 flow [2020-10-11 16:53:28,718 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2516, PETRI_PLACES=171, PETRI_TRANSITIONS=174} [2020-10-11 16:53:28,718 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 116 predicate places. [2020-10-11 16:53:28,718 INFO L481 AbstractCegarLoop]: Abstraction has has 171 places, 174 transitions, 2516 flow [2020-10-11 16:53:28,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 16:53:28,718 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:28,719 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 16:53:28,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-11 16:53:28,932 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:28,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:28,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1826903167, now seen corresponding path program 8 times [2020-10-11 16:53:28,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:28,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984563929] [2020-10-11 16:53:28,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:29,084 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 16:53:29,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984563929] [2020-10-11 16:53:29,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337796957] [2020-10-11 16:53:29,085 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 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 16:53:29,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:53:29,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:29,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:53:29,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:29,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:29,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:29,184 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 16:53:29,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:29,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 16:53:29,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325260807] [2020-10-11 16:53:29,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 16:53:29,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:29,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 16:53:29,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-11 16:53:29,265 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:29,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 174 transitions, 2516 flow. Second operand 12 states. [2020-10-11 16:53:29,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:29,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:29,266 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:29,760 INFO L129 PetriNetUnfolder]: 126/841 cut-off events. [2020-10-11 16:53:29,760 INFO L130 PetriNetUnfolder]: For 12536/12679 co-relation queries the response was YES. [2020-10-11 16:53:29,769 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3468 conditions, 841 events. 126/841 cut-off events. For 12536/12679 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6156 event pairs, 0 based on Foata normal form. 68/822 useless extension candidates. Maximal degree in co-relation 3387. Up to 141 conditions per place. [2020-10-11 16:53:29,775 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 41 selfloop transitions, 115 changer transitions 11/201 dead transitions. [2020-10-11 16:53:29,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 201 transitions, 3658 flow [2020-10-11 16:53:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 16:53:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-11 16:53:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1005 transitions. [2020-10-11 16:53:29,778 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8305785123966942 [2020-10-11 16:53:29,778 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1005 transitions. [2020-10-11 16:53:29,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1005 transitions. [2020-10-11 16:53:29,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:29,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1005 transitions. [2020-10-11 16:53:29,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-11 16:53:29,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-11 16:53:29,782 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-11 16:53:29,782 INFO L185 Difference]: Start difference. First operand has 171 places, 174 transitions, 2516 flow. Second operand 22 states and 1005 transitions. [2020-10-11 16:53:29,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 201 transitions, 3658 flow [2020-10-11 16:53:29,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 201 transitions, 3256 flow, removed 120 selfloop flow, removed 15 redundant places. [2020-10-11 16:53:29,828 INFO L241 Difference]: Finished difference. Result has 180 places, 177 transitions, 2611 flow [2020-10-11 16:53:29,829 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2238, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2611, PETRI_PLACES=180, PETRI_TRANSITIONS=177} [2020-10-11 16:53:29,829 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2020-10-11 16:53:29,829 INFO L481 AbstractCegarLoop]: Abstraction has has 180 places, 177 transitions, 2611 flow [2020-10-11 16:53:29,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 16:53:29,829 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:29,829 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 16:53:30,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 16:53:30,044 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:30,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:30,045 INFO L82 PathProgramCache]: Analyzing trace with hash 438122880, now seen corresponding path program 9 times [2020-10-11 16:53:30,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:30,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287407148] [2020-10-11 16:53:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:30,176 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 16:53:30,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287407148] [2020-10-11 16:53:30,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475429029] [2020-10-11 16:53:30,177 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 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 16:53:30,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 16:53:30,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:30,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:53:30,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:30,254 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:30,262 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 16:53:30,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:30,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 16:53:30,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53992488] [2020-10-11 16:53:30,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 16:53:30,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:30,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 16:53:30,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 16:53:30,348 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:30,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 177 transitions, 2611 flow. Second operand 13 states. [2020-10-11 16:53:30,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:30,349 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:30,349 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:30,684 INFO L129 PetriNetUnfolder]: 128/859 cut-off events. [2020-10-11 16:53:30,685 INFO L130 PetriNetUnfolder]: For 11599/11721 co-relation queries the response was YES. [2020-10-11 16:53:30,692 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3500 conditions, 859 events. 128/859 cut-off events. For 11599/11721 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6310 event pairs, 0 based on Foata normal form. 32/801 useless extension candidates. Maximal degree in co-relation 3416. Up to 193 conditions per place. [2020-10-11 16:53:30,698 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 134 selfloop transitions, 23 changer transitions 8/199 dead transitions. [2020-10-11 16:53:30,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 199 transitions, 3542 flow [2020-10-11 16:53:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 16:53:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-11 16:53:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 685 transitions. [2020-10-11 16:53:30,701 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8303030303030303 [2020-10-11 16:53:30,701 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 685 transitions. [2020-10-11 16:53:30,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 685 transitions. [2020-10-11 16:53:30,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:30,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 685 transitions. [2020-10-11 16:53:30,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-11 16:53:30,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-11 16:53:30,704 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-11 16:53:30,704 INFO L185 Difference]: Start difference. First operand has 180 places, 177 transitions, 2611 flow. Second operand 15 states and 685 transitions. [2020-10-11 16:53:30,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 199 transitions, 3542 flow [2020-10-11 16:53:30,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 199 transitions, 3263 flow, removed 38 selfloop flow, removed 19 redundant places. [2020-10-11 16:53:30,751 INFO L241 Difference]: Finished difference. Result has 179 places, 181 transitions, 2540 flow [2020-10-11 16:53:30,751 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2540, PETRI_PLACES=179, PETRI_TRANSITIONS=181} [2020-10-11 16:53:30,752 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2020-10-11 16:53:30,752 INFO L481 AbstractCegarLoop]: Abstraction has has 179 places, 181 transitions, 2540 flow [2020-10-11 16:53:30,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 16:53:30,752 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:30,752 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 16:53:30,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-11 16:53:30,966 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:30,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:30,967 INFO L82 PathProgramCache]: Analyzing trace with hash -367202260, now seen corresponding path program 10 times [2020-10-11 16:53:30,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:30,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047896636] [2020-10-11 16:53:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:31,100 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 16:53:31,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047896636] [2020-10-11 16:53:31,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221474044] [2020-10-11 16:53:31,101 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 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 16:53:31,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:53:31,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:31,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:53:31,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:31,178 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:31,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:31,230 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 16:53:31,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:31,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-11 16:53:31,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440925962] [2020-10-11 16:53:31,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:53:31,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:31,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:53:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:53:31,626 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:31,627 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 181 transitions, 2540 flow. Second operand 14 states. [2020-10-11 16:53:31,627 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:31,627 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:31,627 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:32,062 INFO L129 PetriNetUnfolder]: 132/902 cut-off events. [2020-10-11 16:53:32,062 INFO L130 PetriNetUnfolder]: For 14310/14427 co-relation queries the response was YES. [2020-10-11 16:53:32,072 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3709 conditions, 902 events. 132/902 cut-off events. For 14310/14427 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6724 event pairs, 0 based on Foata normal form. 34/841 useless extension candidates. Maximal degree in co-relation 3622. Up to 173 conditions per place. [2020-10-11 16:53:32,084 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 124 selfloop transitions, 39 changer transitions 8/205 dead transitions. [2020-10-11 16:53:32,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 205 transitions, 3572 flow [2020-10-11 16:53:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 16:53:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-11 16:53:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 822 transitions. [2020-10-11 16:53:32,096 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8303030303030303 [2020-10-11 16:53:32,097 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 822 transitions. [2020-10-11 16:53:32,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 822 transitions. [2020-10-11 16:53:32,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:32,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 822 transitions. [2020-10-11 16:53:32,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-11 16:53:32,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-11 16:53:32,110 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-11 16:53:32,110 INFO L185 Difference]: Start difference. First operand has 179 places, 181 transitions, 2540 flow. Second operand 18 states and 822 transitions. [2020-10-11 16:53:32,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 205 transitions, 3572 flow [2020-10-11 16:53:32,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 205 transitions, 3391 flow, removed 78 selfloop flow, removed 8 redundant places. [2020-10-11 16:53:32,197 INFO L241 Difference]: Finished difference. Result has 193 places, 186 transitions, 2688 flow [2020-10-11 16:53:32,198 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2443, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2688, PETRI_PLACES=193, PETRI_TRANSITIONS=186} [2020-10-11 16:53:32,200 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 138 predicate places. [2020-10-11 16:53:32,200 INFO L481 AbstractCegarLoop]: Abstraction has has 193 places, 186 transitions, 2688 flow [2020-10-11 16:53:32,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:53:32,200 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:32,201 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 16:53:32,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 16:53:32,413 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:32,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2089009878, now seen corresponding path program 11 times [2020-10-11 16:53:32,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:32,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971744335] [2020-10-11 16:53:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:32,576 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 16:53:32,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971744335] [2020-10-11 16:53:32,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358074520] [2020-10-11 16:53:32,577 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 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 16:53:32,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 16:53:32,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:32,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:53:32,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:32,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:32,699 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 16:53:32,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:32,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 16:53:32,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960236543] [2020-10-11 16:53:32,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 16:53:32,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:32,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 16:53:32,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-11 16:53:33,049 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:33,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 186 transitions, 2688 flow. Second operand 13 states. [2020-10-11 16:53:33,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:33,050 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:33,050 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:33,428 INFO L129 PetriNetUnfolder]: 136/938 cut-off events. [2020-10-11 16:53:33,429 INFO L130 PetriNetUnfolder]: For 14722/14836 co-relation queries the response was YES. [2020-10-11 16:53:33,439 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3864 conditions, 938 events. 136/938 cut-off events. For 14722/14836 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7029 event pairs, 0 based on Foata normal form. 42/881 useless extension candidates. Maximal degree in co-relation 3772. Up to 159 conditions per place. [2020-10-11 16:53:33,446 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 112 selfloop transitions, 56 changer transitions 8/210 dead transitions. [2020-10-11 16:53:33,446 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 210 transitions, 3708 flow [2020-10-11 16:53:33,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 16:53:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 16:53:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 868 transitions. [2020-10-11 16:53:33,448 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.830622009569378 [2020-10-11 16:53:33,448 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 868 transitions. [2020-10-11 16:53:33,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 868 transitions. [2020-10-11 16:53:33,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:33,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 868 transitions. [2020-10-11 16:53:33,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 16:53:33,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 16:53:33,451 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 16:53:33,452 INFO L185 Difference]: Start difference. First operand has 193 places, 186 transitions, 2688 flow. Second operand 19 states and 868 transitions. [2020-10-11 16:53:33,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 210 transitions, 3708 flow [2020-10-11 16:53:33,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 210 transitions, 3557 flow, removed 63 selfloop flow, removed 9 redundant places. [2020-10-11 16:53:33,508 INFO L241 Difference]: Finished difference. Result has 207 places, 191 transitions, 2897 flow [2020-10-11 16:53:33,509 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2605, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2897, PETRI_PLACES=207, PETRI_TRANSITIONS=191} [2020-10-11 16:53:33,509 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 152 predicate places. [2020-10-11 16:53:33,509 INFO L481 AbstractCegarLoop]: Abstraction has has 207 places, 191 transitions, 2897 flow [2020-10-11 16:53:33,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 16:53:33,509 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:33,510 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 16:53:33,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 16:53:33,710 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:33,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1245193434, now seen corresponding path program 12 times [2020-10-11 16:53:33,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:33,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620751425] [2020-10-11 16:53:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:33,828 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 16:53:33,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620751425] [2020-10-11 16:53:33,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179612205] [2020-10-11 16:53:33,830 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 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 16:53:33,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 16:53:33,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:33,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:53:33,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:33,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:33,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:33,951 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 16:53:33,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:33,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-11 16:53:33,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212615065] [2020-10-11 16:53:33,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:53:33,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:33,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:53:33,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:53:34,341 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:34,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 191 transitions, 2897 flow. Second operand 14 states. [2020-10-11 16:53:34,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:34,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:34,342 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:34,945 INFO L129 PetriNetUnfolder]: 149/1011 cut-off events. [2020-10-11 16:53:34,945 INFO L130 PetriNetUnfolder]: For 16600/16756 co-relation queries the response was YES. [2020-10-11 16:53:34,961 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4272 conditions, 1011 events. 149/1011 cut-off events. For 16600/16756 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7810 event pairs, 0 based on Foata normal form. 62/966 useless extension candidates. Maximal degree in co-relation 4175. Up to 179 conditions per place. [2020-10-11 16:53:34,979 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 76 selfloop transitions, 111 changer transitions 8/229 dead transitions. [2020-10-11 16:53:34,980 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 229 transitions, 4201 flow [2020-10-11 16:53:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 16:53:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-11 16:53:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1049 transitions. [2020-10-11 16:53:34,982 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8292490118577075 [2020-10-11 16:53:34,982 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1049 transitions. [2020-10-11 16:53:34,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1049 transitions. [2020-10-11 16:53:34,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:34,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1049 transitions. [2020-10-11 16:53:34,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-11 16:53:34,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-11 16:53:34,987 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-11 16:53:34,988 INFO L185 Difference]: Start difference. First operand has 207 places, 191 transitions, 2897 flow. Second operand 23 states and 1049 transitions. [2020-10-11 16:53:34,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 229 transitions, 4201 flow [2020-10-11 16:53:35,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 229 transitions, 4015 flow, removed 72 selfloop flow, removed 11 redundant places. [2020-10-11 16:53:35,098 INFO L241 Difference]: Finished difference. Result has 225 places, 205 transitions, 3428 flow [2020-10-11 16:53:35,098 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2795, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3428, PETRI_PLACES=225, PETRI_TRANSITIONS=205} [2020-10-11 16:53:35,098 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 170 predicate places. [2020-10-11 16:53:35,099 INFO L481 AbstractCegarLoop]: Abstraction has has 225 places, 205 transitions, 3428 flow [2020-10-11 16:53:35,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:53:35,099 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:35,099 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 16:53:35,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:35,312 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:35,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:35,313 INFO L82 PathProgramCache]: Analyzing trace with hash 33589492, now seen corresponding path program 13 times [2020-10-11 16:53:35,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:35,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098938847] [2020-10-11 16:53:35,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:35,431 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 16:53:35,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098938847] [2020-10-11 16:53:35,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605442091] [2020-10-11 16:53:35,432 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 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 16:53:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:35,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:53:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:35,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:35,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:35,529 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 16:53:35,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:35,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-11 16:53:35,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181910118] [2020-10-11 16:53:35,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:53:35,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:35,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:53:35,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:53:35,883 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:35,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 205 transitions, 3428 flow. Second operand 14 states. [2020-10-11 16:53:35,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:35,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:35,884 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:36,590 INFO L129 PetriNetUnfolder]: 166/1103 cut-off events. [2020-10-11 16:53:36,591 INFO L130 PetriNetUnfolder]: For 21253/21434 co-relation queries the response was YES. [2020-10-11 16:53:36,599 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5000 conditions, 1103 events. 166/1103 cut-off events. For 21253/21434 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8544 event pairs, 0 based on Foata normal form. 73/1061 useless extension candidates. Maximal degree in co-relation 4895. Up to 201 conditions per place. [2020-10-11 16:53:36,607 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 68 selfloop transitions, 136 changer transitions 14/252 dead transitions. [2020-10-11 16:53:36,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 252 transitions, 5209 flow [2020-10-11 16:53:36,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 16:53:36,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-11 16:53:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1280 transitions. [2020-10-11 16:53:36,610 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8311688311688312 [2020-10-11 16:53:36,610 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1280 transitions. [2020-10-11 16:53:36,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1280 transitions. [2020-10-11 16:53:36,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:36,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1280 transitions. [2020-10-11 16:53:36,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-11 16:53:36,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-11 16:53:36,614 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-11 16:53:36,615 INFO L185 Difference]: Start difference. First operand has 225 places, 205 transitions, 3428 flow. Second operand 28 states and 1280 transitions. [2020-10-11 16:53:36,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 252 transitions, 5209 flow [2020-10-11 16:53:36,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 252 transitions, 4906 flow, removed 106 selfloop flow, removed 17 redundant places. [2020-10-11 16:53:36,690 INFO L241 Difference]: Finished difference. Result has 243 places, 221 transitions, 3998 flow [2020-10-11 16:53:36,691 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3998, PETRI_PLACES=243, PETRI_TRANSITIONS=221} [2020-10-11 16:53:36,691 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 188 predicate places. [2020-10-11 16:53:36,691 INFO L481 AbstractCegarLoop]: Abstraction has has 243 places, 221 transitions, 3998 flow [2020-10-11 16:53:36,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:53:36,691 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:36,691 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 16:53:36,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:36,892 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1482227794, now seen corresponding path program 14 times [2020-10-11 16:53:36,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:36,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790056155] [2020-10-11 16:53:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:37,033 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 16:53:37,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790056155] [2020-10-11 16:53:37,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722248214] [2020-10-11 16:53:37,034 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 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 16:53:37,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:53:37,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:37,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:53:37,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:37,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:37,121 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 16:53:37,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:37,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 16:53:37,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352600829] [2020-10-11 16:53:37,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:53:37,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:37,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:53:37,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:53:37,502 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:37,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 221 transitions, 3998 flow. Second operand 14 states. [2020-10-11 16:53:37,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:37,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:37,503 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:38,041 INFO L129 PetriNetUnfolder]: 164/1108 cut-off events. [2020-10-11 16:53:38,042 INFO L130 PetriNetUnfolder]: For 31199/31383 co-relation queries the response was YES. [2020-10-11 16:53:38,058 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5562 conditions, 1108 events. 164/1108 cut-off events. For 31199/31383 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8611 event pairs, 0 based on Foata normal form. 44/1035 useless extension candidates. Maximal degree in co-relation 5451. Up to 222 conditions per place. [2020-10-11 16:53:38,069 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 155 selfloop transitions, 47 changer transitions 8/244 dead transitions. [2020-10-11 16:53:38,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 244 transitions, 5308 flow [2020-10-11 16:53:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 16:53:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-11 16:53:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 776 transitions. [2020-10-11 16:53:38,072 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8299465240641711 [2020-10-11 16:53:38,072 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 776 transitions. [2020-10-11 16:53:38,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 776 transitions. [2020-10-11 16:53:38,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:38,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 776 transitions. [2020-10-11 16:53:38,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-11 16:53:38,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-11 16:53:38,075 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-11 16:53:38,076 INFO L185 Difference]: Start difference. First operand has 243 places, 221 transitions, 3998 flow. Second operand 17 states and 776 transitions. [2020-10-11 16:53:38,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 244 transitions, 5308 flow [2020-10-11 16:53:38,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 244 transitions, 4782 flow, removed 171 selfloop flow, removed 21 redundant places. [2020-10-11 16:53:38,203 INFO L241 Difference]: Finished difference. Result has 238 places, 223 transitions, 3747 flow [2020-10-11 16:53:38,204 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3747, PETRI_PLACES=238, PETRI_TRANSITIONS=223} [2020-10-11 16:53:38,204 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 183 predicate places. [2020-10-11 16:53:38,204 INFO L481 AbstractCegarLoop]: Abstraction has has 238 places, 223 transitions, 3747 flow [2020-10-11 16:53:38,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:53:38,204 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:38,204 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 16:53:38,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-11 16:53:38,405 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:38,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:38,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1396563990, now seen corresponding path program 15 times [2020-10-11 16:53:38,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:38,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017853853] [2020-10-11 16:53:38,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:38,551 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 16:53:38,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017853853] [2020-10-11 16:53:38,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465843244] [2020-10-11 16:53:38,551 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 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 16:53:38,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 16:53:38,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:38,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:53:38,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:38,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:38,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:38,719 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 16:53:38,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:38,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-11 16:53:38,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743864248] [2020-10-11 16:53:38,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:53:38,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:38,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:53:38,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:53:39,284 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:39,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 223 transitions, 3747 flow. Second operand 15 states. [2020-10-11 16:53:39,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:39,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:39,286 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:39,876 INFO L129 PetriNetUnfolder]: 166/1133 cut-off events. [2020-10-11 16:53:39,876 INFO L130 PetriNetUnfolder]: For 30538/30711 co-relation queries the response was YES. [2020-10-11 16:53:39,891 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5499 conditions, 1133 events. 166/1133 cut-off events. For 30538/30711 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8831 event pairs, 0 based on Foata normal form. 52/1066 useless extension candidates. Maximal degree in co-relation 5388. Up to 197 conditions per place. [2020-10-11 16:53:39,900 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 128 selfloop transitions, 77 changer transitions 8/247 dead transitions. [2020-10-11 16:53:39,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 247 transitions, 5115 flow [2020-10-11 16:53:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 16:53:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-11 16:53:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 956 transitions. [2020-10-11 16:53:39,902 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8277056277056277 [2020-10-11 16:53:39,902 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 956 transitions. [2020-10-11 16:53:39,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 956 transitions. [2020-10-11 16:53:39,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:39,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 956 transitions. [2020-10-11 16:53:39,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-11 16:53:39,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-11 16:53:39,906 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-11 16:53:39,906 INFO L185 Difference]: Start difference. First operand has 238 places, 223 transitions, 3747 flow. Second operand 21 states and 956 transitions. [2020-10-11 16:53:39,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 247 transitions, 5115 flow [2020-10-11 16:53:39,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 247 transitions, 4838 flow, removed 96 selfloop flow, removed 16 redundant places. [2020-10-11 16:53:39,982 INFO L241 Difference]: Finished difference. Result has 244 places, 225 transitions, 3854 flow [2020-10-11 16:53:39,982 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3854, PETRI_PLACES=244, PETRI_TRANSITIONS=225} [2020-10-11 16:53:39,982 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 189 predicate places. [2020-10-11 16:53:39,982 INFO L481 AbstractCegarLoop]: Abstraction has has 244 places, 225 transitions, 3854 flow [2020-10-11 16:53:39,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:53:39,982 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:39,982 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 16:53:40,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:40,183 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:40,184 INFO L82 PathProgramCache]: Analyzing trace with hash -482714164, now seen corresponding path program 16 times [2020-10-11 16:53:40,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:40,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096106719] [2020-10-11 16:53:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:40,316 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 16:53:40,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096106719] [2020-10-11 16:53:40,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562323508] [2020-10-11 16:53:40,317 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 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 16:53:40,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:53:40,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:40,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 16:53:40,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:40,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:40,402 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 16:53:40,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:40,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 16:53:40,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821901649] [2020-10-11 16:53:40,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:53:40,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:40,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:53:40,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:53:40,925 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:40,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 225 transitions, 3854 flow. Second operand 14 states. [2020-10-11 16:53:40,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:40,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:40,926 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:41,679 INFO L129 PetriNetUnfolder]: 168/1151 cut-off events. [2020-10-11 16:53:41,679 INFO L130 PetriNetUnfolder]: For 28802/28972 co-relation queries the response was YES. [2020-10-11 16:53:41,699 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5514 conditions, 1151 events. 168/1151 cut-off events. For 28802/28972 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9020 event pairs, 0 based on Foata normal form. 61/1091 useless extension candidates. Maximal degree in co-relation 5403. Up to 201 conditions per place. [2020-10-11 16:53:41,719 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 99 selfloop transitions, 107 changer transitions 8/248 dead transitions. [2020-10-11 16:53:41,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 248 transitions, 5213 flow [2020-10-11 16:53:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 16:53:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-11 16:53:41,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 911 transitions. [2020-10-11 16:53:41,725 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8281818181818181 [2020-10-11 16:53:41,726 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 911 transitions. [2020-10-11 16:53:41,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 911 transitions. [2020-10-11 16:53:41,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:41,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 911 transitions. [2020-10-11 16:53:41,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-11 16:53:41,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-11 16:53:41,733 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-11 16:53:41,733 INFO L185 Difference]: Start difference. First operand has 244 places, 225 transitions, 3854 flow. Second operand 20 states and 911 transitions. [2020-10-11 16:53:41,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 248 transitions, 5213 flow [2020-10-11 16:53:41,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 248 transitions, 4933 flow, removed 72 selfloop flow, removed 18 redundant places. [2020-10-11 16:53:41,911 INFO L241 Difference]: Finished difference. Result has 247 places, 227 transitions, 3995 flow [2020-10-11 16:53:41,912 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3658, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3995, PETRI_PLACES=247, PETRI_TRANSITIONS=227} [2020-10-11 16:53:41,912 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 192 predicate places. [2020-10-11 16:53:41,912 INFO L481 AbstractCegarLoop]: Abstraction has has 247 places, 227 transitions, 3995 flow [2020-10-11 16:53:41,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:53:41,912 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:41,912 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 16:53:42,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-11 16:53:42,127 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:42,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:42,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1884880982, now seen corresponding path program 17 times [2020-10-11 16:53:42,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:42,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525767737] [2020-10-11 16:53:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:42,277 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 16:53:42,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525767737] [2020-10-11 16:53:42,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7894419] [2020-10-11 16:53:42,278 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 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 16:53:42,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 16:53:42,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:42,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:53:42,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:42,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:42,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:42,440 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 16:53:42,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:42,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-11 16:53:42,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675106782] [2020-10-11 16:53:42,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:53:42,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:42,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:53:42,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:53:43,015 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:43,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 227 transitions, 3995 flow. Second operand 15 states. [2020-10-11 16:53:43,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:43,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:43,016 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:43,601 INFO L129 PetriNetUnfolder]: 172/1187 cut-off events. [2020-10-11 16:53:43,601 INFO L130 PetriNetUnfolder]: For 29983/30159 co-relation queries the response was YES. [2020-10-11 16:53:43,614 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5729 conditions, 1187 events. 172/1187 cut-off events. For 29983/30159 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9354 event pairs, 0 based on Foata normal form. 73/1134 useless extension candidates. Maximal degree in co-relation 5616. Up to 209 conditions per place. [2020-10-11 16:53:43,621 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 80 selfloop transitions, 132 changer transitions 8/254 dead transitions. [2020-10-11 16:53:43,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 254 transitions, 5457 flow [2020-10-11 16:53:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 16:53:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-11 16:53:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1048 transitions. [2020-10-11 16:53:43,627 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8284584980237154 [2020-10-11 16:53:43,627 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1048 transitions. [2020-10-11 16:53:43,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1048 transitions. [2020-10-11 16:53:43,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:43,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1048 transitions. [2020-10-11 16:53:43,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-11 16:53:43,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-11 16:53:43,634 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-11 16:53:43,634 INFO L185 Difference]: Start difference. First operand has 247 places, 227 transitions, 3995 flow. Second operand 23 states and 1048 transitions. [2020-10-11 16:53:43,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 254 transitions, 5457 flow [2020-10-11 16:53:43,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 254 transitions, 5122 flow, removed 74 selfloop flow, removed 17 redundant places. [2020-10-11 16:53:43,756 INFO L241 Difference]: Finished difference. Result has 254 places, 231 transitions, 4188 flow [2020-10-11 16:53:43,758 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3748, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4188, PETRI_PLACES=254, PETRI_TRANSITIONS=231} [2020-10-11 16:53:43,758 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 199 predicate places. [2020-10-11 16:53:43,758 INFO L481 AbstractCegarLoop]: Abstraction has has 254 places, 231 transitions, 4188 flow [2020-10-11 16:53:43,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:53:43,758 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:43,759 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 16:53:43,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-11 16:53:43,971 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:43,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:43,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1190835820, now seen corresponding path program 18 times [2020-10-11 16:53:43,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:43,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678920108] [2020-10-11 16:53:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:44,149 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 16:53:44,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678920108] [2020-10-11 16:53:44,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913676579] [2020-10-11 16:53:44,150 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 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 16:53:44,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 16:53:44,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:44,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:53:44,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:44,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:44,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:44,245 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 16:53:44,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:44,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-11 16:53:44,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256681211] [2020-10-11 16:53:44,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:53:44,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:44,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:53:44,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:53:44,437 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:44,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 231 transitions, 4188 flow. Second operand 15 states. [2020-10-11 16:53:44,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:44,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:44,438 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:45,226 INFO L129 PetriNetUnfolder]: 184/1249 cut-off events. [2020-10-11 16:53:45,226 INFO L130 PetriNetUnfolder]: For 32893/33077 co-relation queries the response was YES. [2020-10-11 16:53:45,240 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6231 conditions, 1249 events. 184/1249 cut-off events. For 32893/33077 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9836 event pairs, 0 based on Foata normal form. 87/1206 useless extension candidates. Maximal degree in co-relation 6116. Up to 225 conditions per place. [2020-10-11 16:53:45,247 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 50 selfloop transitions, 175 changer transitions 14/273 dead transitions. [2020-10-11 16:53:45,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 273 transitions, 6359 flow [2020-10-11 16:53:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 16:53:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-11 16:53:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1371 transitions. [2020-10-11 16:53:45,254 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8309090909090909 [2020-10-11 16:53:45,254 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1371 transitions. [2020-10-11 16:53:45,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1371 transitions. [2020-10-11 16:53:45,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:45,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1371 transitions. [2020-10-11 16:53:45,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-11 16:53:45,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-11 16:53:45,259 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-11 16:53:45,259 INFO L185 Difference]: Start difference. First operand has 254 places, 231 transitions, 4188 flow. Second operand 30 states and 1371 transitions. [2020-10-11 16:53:45,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 273 transitions, 6359 flow [2020-10-11 16:53:45,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 273 transitions, 5975 flow, removed 111 selfloop flow, removed 18 redundant places. [2020-10-11 16:53:45,390 INFO L241 Difference]: Finished difference. Result has 273 places, 242 transitions, 4781 flow [2020-10-11 16:53:45,390 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3956, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4781, PETRI_PLACES=273, PETRI_TRANSITIONS=242} [2020-10-11 16:53:45,390 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 218 predicate places. [2020-10-11 16:53:45,391 INFO L481 AbstractCegarLoop]: Abstraction has has 273 places, 242 transitions, 4781 flow [2020-10-11 16:53:45,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:53:45,391 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:45,391 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 16:53:45,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-11 16:53:45,605 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:45,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:45,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1695895348, now seen corresponding path program 19 times [2020-10-11 16:53:45,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:45,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752378350] [2020-10-11 16:53:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:45,728 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 16:53:45,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752378350] [2020-10-11 16:53:45,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730961863] [2020-10-11 16:53:45,729 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 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 16:53:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:45,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:53:45,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:45,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:45,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:45,840 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 16:53:45,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:45,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-11 16:53:45,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99962058] [2020-10-11 16:53:45,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:53:45,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:45,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:53:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:53:46,313 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:46,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 242 transitions, 4781 flow. Second operand 15 states. [2020-10-11 16:53:46,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:46,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:46,314 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:47,026 INFO L129 PetriNetUnfolder]: 203/1383 cut-off events. [2020-10-11 16:53:47,026 INFO L130 PetriNetUnfolder]: For 51938/52161 co-relation queries the response was YES. [2020-10-11 16:53:47,039 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7659 conditions, 1383 events. 203/1383 cut-off events. For 51938/52161 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 11205 event pairs, 0 based on Foata normal form. 91/1328 useless extension candidates. Maximal degree in co-relation 7536. Up to 257 conditions per place. [2020-10-11 16:53:47,049 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 87 selfloop transitions, 163 changer transitions 11/295 dead transitions. [2020-10-11 16:53:47,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 295 transitions, 7328 flow [2020-10-11 16:53:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 16:53:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-11 16:53:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1279 transitions. [2020-10-11 16:53:47,051 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8305194805194805 [2020-10-11 16:53:47,051 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1279 transitions. [2020-10-11 16:53:47,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1279 transitions. [2020-10-11 16:53:47,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:47,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1279 transitions. [2020-10-11 16:53:47,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-11 16:53:47,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-11 16:53:47,055 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-11 16:53:47,055 INFO L185 Difference]: Start difference. First operand has 273 places, 242 transitions, 4781 flow. Second operand 28 states and 1279 transitions. [2020-10-11 16:53:47,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 295 transitions, 7328 flow [2020-10-11 16:53:47,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 295 transitions, 6553 flow, removed 221 selfloop flow, removed 24 redundant places. [2020-10-11 16:53:47,179 INFO L241 Difference]: Finished difference. Result has 280 places, 266 transitions, 5350 flow [2020-10-11 16:53:47,180 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=4178, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5350, PETRI_PLACES=280, PETRI_TRANSITIONS=266} [2020-10-11 16:53:47,180 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 225 predicate places. [2020-10-11 16:53:47,180 INFO L481 AbstractCegarLoop]: Abstraction has has 280 places, 266 transitions, 5350 flow [2020-10-11 16:53:47,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:53:47,180 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:47,180 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 16:53:47,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-11 16:53:47,381 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:47,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1108919360, now seen corresponding path program 20 times [2020-10-11 16:53:47,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:47,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078013316] [2020-10-11 16:53:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:53:47,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078013316] [2020-10-11 16:53:47,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573477003] [2020-10-11 16:53:47,518 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 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 16:53:47,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:53:47,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:47,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 16:53:47,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:47,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:47,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:53:47,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:47,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-10-11 16:53:47,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491407920] [2020-10-11 16:53:47,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:53:47,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:47,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:53:47,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:53:48,169 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:48,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 266 transitions, 5350 flow. Second operand 16 states. [2020-10-11 16:53:48,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:48,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:48,170 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:48,954 INFO L129 PetriNetUnfolder]: 210/1423 cut-off events. [2020-10-11 16:53:48,954 INFO L130 PetriNetUnfolder]: For 61421/61676 co-relation queries the response was YES. [2020-10-11 16:53:48,967 INFO L80 FinitePrefix]: Finished finitePrefix Result has 8185 conditions, 1423 events. 210/1423 cut-off events. For 61421/61676 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 11467 event pairs, 0 based on Foata normal form. 99/1374 useless extension candidates. Maximal degree in co-relation 8058. Up to 263 conditions per place. [2020-10-11 16:53:48,977 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 60 selfloop transitions, 201 changer transitions 11/306 dead transitions. [2020-10-11 16:53:48,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 306 transitions, 8040 flow [2020-10-11 16:53:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 16:53:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-11 16:53:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1279 transitions. [2020-10-11 16:53:48,980 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8305194805194805 [2020-10-11 16:53:48,980 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1279 transitions. [2020-10-11 16:53:48,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1279 transitions. [2020-10-11 16:53:48,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:48,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1279 transitions. [2020-10-11 16:53:48,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-11 16:53:48,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-11 16:53:48,984 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-11 16:53:48,984 INFO L185 Difference]: Start difference. First operand has 280 places, 266 transitions, 5350 flow. Second operand 28 states and 1279 transitions. [2020-10-11 16:53:48,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 306 transitions, 8040 flow [2020-10-11 16:53:49,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 306 transitions, 7186 flow, removed 323 selfloop flow, removed 21 redundant places. [2020-10-11 16:53:49,127 INFO L241 Difference]: Finished difference. Result has 291 places, 277 transitions, 5709 flow [2020-10-11 16:53:49,128 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5709, PETRI_PLACES=291, PETRI_TRANSITIONS=277} [2020-10-11 16:53:49,128 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 236 predicate places. [2020-10-11 16:53:49,128 INFO L481 AbstractCegarLoop]: Abstraction has has 291 places, 277 transitions, 5709 flow [2020-10-11 16:53:49,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:53:49,128 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:49,129 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 16:53:49,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-11 16:53:49,339 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:49,339 INFO L82 PathProgramCache]: Analyzing trace with hash -183806499, now seen corresponding path program 21 times [2020-10-11 16:53:49,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:49,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488182019] [2020-10-11 16:53:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:49,493 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 16:53:49,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488182019] [2020-10-11 16:53:49,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467072670] [2020-10-11 16:53:49,494 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 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 16:53:49,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 16:53:49,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:49,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 16:53:49,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:49,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:49,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:49,610 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 16:53:49,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:49,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-11 16:53:49,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82187045] [2020-10-11 16:53:49,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 16:53:49,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:49,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 16:53:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-11 16:53:49,828 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:49,828 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 277 transitions, 5709 flow. Second operand 17 states. [2020-10-11 16:53:49,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:49,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:49,829 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:50,749 INFO L129 PetriNetUnfolder]: 234/1578 cut-off events. [2020-10-11 16:53:50,750 INFO L130 PetriNetUnfolder]: For 77670/77965 co-relation queries the response was YES. [2020-10-11 16:53:50,768 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9498 conditions, 1578 events. 234/1578 cut-off events. For 77670/77965 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 12697 event pairs, 0 based on Foata normal form. 100/1513 useless extension candidates. Maximal degree in co-relation 9365. Up to 285 conditions per place. [2020-10-11 16:53:50,780 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 89 selfloop transitions, 200 changer transitions 14/337 dead transitions. [2020-10-11 16:53:50,781 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 337 transitions, 9222 flow [2020-10-11 16:53:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 16:53:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-11 16:53:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1508 transitions. [2020-10-11 16:53:50,783 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8308539944903581 [2020-10-11 16:53:50,783 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1508 transitions. [2020-10-11 16:53:50,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1508 transitions. [2020-10-11 16:53:50,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:50,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1508 transitions. [2020-10-11 16:53:50,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-11 16:53:50,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-11 16:53:50,787 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-11 16:53:50,787 INFO L185 Difference]: Start difference. First operand has 291 places, 277 transitions, 5709 flow. Second operand 33 states and 1508 transitions. [2020-10-11 16:53:50,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 337 transitions, 9222 flow [2020-10-11 16:53:50,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 337 transitions, 8426 flow, removed 237 selfloop flow, removed 21 redundant places. [2020-10-11 16:53:50,954 INFO L241 Difference]: Finished difference. Result has 310 places, 301 transitions, 6585 flow [2020-10-11 16:53:50,955 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5069, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6585, PETRI_PLACES=310, PETRI_TRANSITIONS=301} [2020-10-11 16:53:50,955 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 255 predicate places. [2020-10-11 16:53:50,955 INFO L481 AbstractCegarLoop]: Abstraction has has 310 places, 301 transitions, 6585 flow [2020-10-11 16:53:50,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 16:53:50,955 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:50,955 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 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 16:53:51,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:51,156 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1827054193, now seen corresponding path program 22 times [2020-10-11 16:53:51,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:51,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975563906] [2020-10-11 16:53:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:51,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975563906] [2020-10-11 16:53:51,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758645454] [2020-10-11 16:53:51,398 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 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 16:53:51,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:53:51,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:51,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 16:53:51,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:51,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:51,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:51,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:51,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 16:53:51,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355296421] [2020-10-11 16:53:51,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 16:53:51,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:51,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 16:53:51,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-11 16:53:51,898 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:51,899 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 301 transitions, 6585 flow. Second operand 17 states. [2020-10-11 16:53:51,899 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:51,899 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:51,899 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:52,784 INFO L129 PetriNetUnfolder]: 236/1610 cut-off events. [2020-10-11 16:53:52,784 INFO L130 PetriNetUnfolder]: For 101293/101584 co-relation queries the response was YES. [2020-10-11 16:53:52,808 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10266 conditions, 1610 events. 236/1610 cut-off events. For 101293/101584 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 12957 event pairs, 0 based on Foata normal form. 98/1540 useless extension candidates. Maximal degree in co-relation 10124. Up to 285 conditions per place. [2020-10-11 16:53:52,816 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 75 selfloop transitions, 221 changer transitions 8/338 dead transitions. [2020-10-11 16:53:52,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 338 transitions, 9659 flow [2020-10-11 16:53:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 16:53:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-11 16:53:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1278 transitions. [2020-10-11 16:53:52,818 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8298701298701299 [2020-10-11 16:53:52,818 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1278 transitions. [2020-10-11 16:53:52,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1278 transitions. [2020-10-11 16:53:52,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:52,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1278 transitions. [2020-10-11 16:53:52,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-11 16:53:52,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-11 16:53:52,821 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-11 16:53:52,821 INFO L185 Difference]: Start difference. First operand has 310 places, 301 transitions, 6585 flow. Second operand 28 states and 1278 transitions. [2020-10-11 16:53:52,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 338 transitions, 9659 flow [2020-10-11 16:53:53,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 338 transitions, 8311 flow, removed 454 selfloop flow, removed 36 redundant places. [2020-10-11 16:53:53,030 INFO L241 Difference]: Finished difference. Result has 303 places, 307 transitions, 6385 flow [2020-10-11 16:53:53,031 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5563, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6385, PETRI_PLACES=303, PETRI_TRANSITIONS=307} [2020-10-11 16:53:53,031 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 248 predicate places. [2020-10-11 16:53:53,031 INFO L481 AbstractCegarLoop]: Abstraction has has 303 places, 307 transitions, 6385 flow [2020-10-11 16:53:53,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 16:53:53,031 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:53,031 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:53,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-11 16:53:53,241 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash 59182072, now seen corresponding path program 23 times [2020-10-11 16:53:53,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:53,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434426670] [2020-10-11 16:53:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:53,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434426670] [2020-10-11 16:53:53,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037868085] [2020-10-11 16:53:53,458 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 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 16:53:53,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 16:53:53,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:53,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 16:53:53,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:53,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:53,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:53,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 16:53:53,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100668831] [2020-10-11 16:53:53,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 16:53:53,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:53,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 16:53:53,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-11 16:53:53,926 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:53,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 307 transitions, 6385 flow. Second operand 18 states. [2020-10-11 16:53:53,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:53,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:53,927 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:54,817 INFO L129 PetriNetUnfolder]: 248/1725 cut-off events. [2020-10-11 16:53:54,818 INFO L130 PetriNetUnfolder]: For 102191/102453 co-relation queries the response was YES. [2020-10-11 16:53:54,838 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10520 conditions, 1725 events. 248/1725 cut-off events. For 102191/102453 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 13996 event pairs, 0 based on Foata normal form. 50/1589 useless extension candidates. Maximal degree in co-relation 10386. Up to 345 conditions per place. [2020-10-11 16:53:54,846 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 244 selfloop transitions, 63 changer transitions 8/349 dead transitions. [2020-10-11 16:53:54,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 349 transitions, 9059 flow [2020-10-11 16:53:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 16:53:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-11 16:53:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 956 transitions. [2020-10-11 16:53:54,847 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8277056277056277 [2020-10-11 16:53:54,848 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 956 transitions. [2020-10-11 16:53:54,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 956 transitions. [2020-10-11 16:53:54,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:54,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 956 transitions. [2020-10-11 16:53:54,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-11 16:53:54,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-11 16:53:54,851 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-11 16:53:54,851 INFO L185 Difference]: Start difference. First operand has 303 places, 307 transitions, 6385 flow. Second operand 21 states and 956 transitions. [2020-10-11 16:53:54,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 349 transitions, 9059 flow [2020-10-11 16:53:55,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 349 transitions, 8417 flow, removed 139 selfloop flow, removed 21 redundant places. [2020-10-11 16:53:55,076 INFO L241 Difference]: Finished difference. Result has 306 places, 319 transitions, 6458 flow [2020-10-11 16:53:55,077 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5853, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6458, PETRI_PLACES=306, PETRI_TRANSITIONS=319} [2020-10-11 16:53:55,077 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 251 predicate places. [2020-10-11 16:53:55,077 INFO L481 AbstractCegarLoop]: Abstraction has has 306 places, 319 transitions, 6458 flow [2020-10-11 16:53:55,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 16:53:55,077 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:55,078 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:55,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:55,285 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:55,286 INFO L82 PathProgramCache]: Analyzing trace with hash -570230890, now seen corresponding path program 24 times [2020-10-11 16:53:55,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:55,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782861564] [2020-10-11 16:53:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:55,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782861564] [2020-10-11 16:53:55,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479263709] [2020-10-11 16:53:55,494 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 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 16:53:55,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 16:53:55,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:55,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 16:53:55,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:55,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:53:55,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:55,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:55,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-11 16:53:55,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519545627] [2020-10-11 16:53:55,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 16:53:55,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:55,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 16:53:55,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-10-11 16:53:56,255 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:56,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 319 transitions, 6458 flow. Second operand 19 states. [2020-10-11 16:53:56,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:56,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:56,256 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:57,111 INFO L129 PetriNetUnfolder]: 260/1833 cut-off events. [2020-10-11 16:53:57,111 INFO L130 PetriNetUnfolder]: For 112315/112584 co-relation queries the response was YES. [2020-10-11 16:53:57,142 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11149 conditions, 1833 events. 260/1833 cut-off events. For 112315/112584 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 15072 event pairs, 0 based on Foata normal form. 58/1693 useless extension candidates. Maximal degree in co-relation 11010. Up to 305 conditions per place. [2020-10-11 16:53:57,156 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 211 selfloop transitions, 109 changer transitions 8/362 dead transitions. [2020-10-11 16:53:57,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 362 transitions, 9232 flow [2020-10-11 16:53:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 16:53:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-11 16:53:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1136 transitions. [2020-10-11 16:53:57,160 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8261818181818181 [2020-10-11 16:53:57,161 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1136 transitions. [2020-10-11 16:53:57,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1136 transitions. [2020-10-11 16:53:57,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:57,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1136 transitions. [2020-10-11 16:53:57,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-11 16:53:57,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-11 16:53:57,164 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-11 16:53:57,164 INFO L185 Difference]: Start difference. First operand has 306 places, 319 transitions, 6458 flow. Second operand 25 states and 1136 transitions. [2020-10-11 16:53:57,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 362 transitions, 9232 flow [2020-10-11 16:53:57,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 362 transitions, 8969 flow, removed 81 selfloop flow, removed 16 redundant places. [2020-10-11 16:53:57,397 INFO L241 Difference]: Finished difference. Result has 318 places, 331 transitions, 7005 flow [2020-10-11 16:53:57,398 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=6261, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7005, PETRI_PLACES=318, PETRI_TRANSITIONS=331} [2020-10-11 16:53:57,398 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 263 predicate places. [2020-10-11 16:53:57,398 INFO L481 AbstractCegarLoop]: Abstraction has has 318 places, 331 transitions, 7005 flow [2020-10-11 16:53:57,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 16:53:57,399 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:57,399 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:57,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-11 16:53:57,606 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:57,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1966511048, now seen corresponding path program 25 times [2020-10-11 16:53:57,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:57,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123015619] [2020-10-11 16:53:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:57,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123015619] [2020-10-11 16:53:57,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672147511] [2020-10-11 16:53:57,789 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 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 16:53:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:57,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 16:53:57,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:57,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:57,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:57,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 16:53:57,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431119223] [2020-10-11 16:53:57,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 16:53:57,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:57,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 16:53:57,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-10-11 16:53:58,272 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:53:58,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 331 transitions, 7005 flow. Second operand 18 states. [2020-10-11 16:53:58,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:53:58,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:53:58,273 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:53:59,150 INFO L129 PetriNetUnfolder]: 272/1941 cut-off events. [2020-10-11 16:53:59,150 INFO L130 PetriNetUnfolder]: For 123742/124013 co-relation queries the response was YES. [2020-10-11 16:53:59,170 INFO L80 FinitePrefix]: Finished finitePrefix Result has 12005 conditions, 1941 events. 272/1941 cut-off events. For 123742/124013 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 16205 event pairs, 0 based on Foata normal form. 67/1798 useless extension candidates. Maximal degree in co-relation 11862. Up to 323 conditions per place. [2020-10-11 16:53:59,180 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 176 selfloop transitions, 155 changer transitions 8/373 dead transitions. [2020-10-11 16:53:59,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 373 transitions, 9912 flow [2020-10-11 16:53:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 16:53:59,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-11 16:53:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1091 transitions. [2020-10-11 16:53:59,182 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8265151515151515 [2020-10-11 16:53:59,182 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1091 transitions. [2020-10-11 16:53:59,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1091 transitions. [2020-10-11 16:53:59,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:53:59,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1091 transitions. [2020-10-11 16:53:59,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-11 16:53:59,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-11 16:53:59,186 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-11 16:53:59,186 INFO L185 Difference]: Start difference. First operand has 318 places, 331 transitions, 7005 flow. Second operand 24 states and 1091 transitions. [2020-10-11 16:53:59,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 373 transitions, 9912 flow [2020-10-11 16:53:59,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 373 transitions, 9506 flow, removed 119 selfloop flow, removed 20 redundant places. [2020-10-11 16:53:59,421 INFO L241 Difference]: Finished difference. Result has 325 places, 343 transitions, 7580 flow [2020-10-11 16:53:59,421 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=6719, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7580, PETRI_PLACES=325, PETRI_TRANSITIONS=343} [2020-10-11 16:53:59,421 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 270 predicate places. [2020-10-11 16:53:59,421 INFO L481 AbstractCegarLoop]: Abstraction has has 325 places, 343 transitions, 7580 flow [2020-10-11 16:53:59,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 16:53:59,421 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:53:59,422 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:53:59,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:53:59,623 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:53:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:53:59,623 INFO L82 PathProgramCache]: Analyzing trace with hash -569136948, now seen corresponding path program 26 times [2020-10-11 16:53:59,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:53:59,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107420811] [2020-10-11 16:53:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:53:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:53:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:59,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107420811] [2020-10-11 16:53:59,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116660055] [2020-10-11 16:53:59,821 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 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 16:53:59,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:53:59,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:53:59,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 16:53:59,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:53:59,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:53:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:53:59,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:53:59,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 16:53:59,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164888977] [2020-10-11 16:53:59,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 16:53:59,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:53:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 16:53:59,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-11 16:54:00,047 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:00,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 343 transitions, 7580 flow. Second operand 18 states. [2020-10-11 16:54:00,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:00,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:00,048 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:00,875 INFO L129 PetriNetUnfolder]: 290/2110 cut-off events. [2020-10-11 16:54:00,875 INFO L130 PetriNetUnfolder]: For 134436/134677 co-relation queries the response was YES. [2020-10-11 16:54:00,906 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13086 conditions, 2110 events. 290/2110 cut-off events. For 134436/134677 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 18021 event pairs, 0 based on Foata normal form. 87/1968 useless extension candidates. Maximal degree in co-relation 12939. Up to 351 conditions per place. [2020-10-11 16:54:00,917 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 128 selfloop transitions, 221 changer transitions 8/391 dead transitions. [2020-10-11 16:54:00,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 391 transitions, 10806 flow [2020-10-11 16:54:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 16:54:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-11 16:54:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1183 transitions. [2020-10-11 16:54:00,918 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8272727272727273 [2020-10-11 16:54:00,918 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1183 transitions. [2020-10-11 16:54:00,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1183 transitions. [2020-10-11 16:54:00,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:00,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1183 transitions. [2020-10-11 16:54:00,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-11 16:54:00,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-11 16:54:00,922 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-11 16:54:00,922 INFO L185 Difference]: Start difference. First operand has 325 places, 343 transitions, 7580 flow. Second operand 26 states and 1183 transitions. [2020-10-11 16:54:00,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 391 transitions, 10806 flow [2020-10-11 16:54:01,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 391 transitions, 10325 flow, removed 123 selfloop flow, removed 19 redundant places. [2020-10-11 16:54:01,234 INFO L241 Difference]: Finished difference. Result has 337 places, 361 transitions, 8478 flow [2020-10-11 16:54:01,235 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=7227, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8478, PETRI_PLACES=337, PETRI_TRANSITIONS=361} [2020-10-11 16:54:01,235 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 282 predicate places. [2020-10-11 16:54:01,235 INFO L481 AbstractCegarLoop]: Abstraction has has 337 places, 361 transitions, 8478 flow [2020-10-11 16:54:01,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 16:54:01,235 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:01,236 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:01,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-11 16:54:01,442 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:01,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:01,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1487602666, now seen corresponding path program 27 times [2020-10-11 16:54:01,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:01,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511430535] [2020-10-11 16:54:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:01,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511430535] [2020-10-11 16:54:01,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148477315] [2020-10-11 16:54:01,648 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 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 16:54:01,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 16:54:01,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:01,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 16:54:01,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:01,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:54:01,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:01,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:01,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-11 16:54:01,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451724214] [2020-10-11 16:54:01,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 16:54:01,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:01,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 16:54:01,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-11 16:54:02,514 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:02,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 361 transitions, 8478 flow. Second operand 19 states. [2020-10-11 16:54:02,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:02,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:02,515 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:03,563 INFO L129 PetriNetUnfolder]: 307/2256 cut-off events. [2020-10-11 16:54:03,564 INFO L130 PetriNetUnfolder]: For 144692/144963 co-relation queries the response was YES. [2020-10-11 16:54:03,596 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14175 conditions, 2256 events. 307/2256 cut-off events. For 144692/144963 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 19742 event pairs, 0 based on Foata normal form. 92/2104 useless extension candidates. Maximal degree in co-relation 14022. Up to 377 conditions per place. [2020-10-11 16:54:03,608 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 118 selfloop transitions, 250 changer transitions 8/410 dead transitions. [2020-10-11 16:54:03,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 410 transitions, 11862 flow [2020-10-11 16:54:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 16:54:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-11 16:54:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1320 transitions. [2020-10-11 16:54:03,611 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8275862068965517 [2020-10-11 16:54:03,611 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1320 transitions. [2020-10-11 16:54:03,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1320 transitions. [2020-10-11 16:54:03,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:03,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1320 transitions. [2020-10-11 16:54:03,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-11 16:54:03,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-11 16:54:03,615 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-11 16:54:03,615 INFO L185 Difference]: Start difference. First operand has 337 places, 361 transitions, 8478 flow. Second operand 29 states and 1320 transitions. [2020-10-11 16:54:03,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 410 transitions, 11862 flow [2020-10-11 16:54:03,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 410 transitions, 11314 flow, removed 137 selfloop flow, removed 19 redundant places. [2020-10-11 16:54:03,993 INFO L241 Difference]: Finished difference. Result has 353 places, 379 transitions, 9459 flow [2020-10-11 16:54:03,994 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=8074, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9459, PETRI_PLACES=353, PETRI_TRANSITIONS=379} [2020-10-11 16:54:03,994 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 298 predicate places. [2020-10-11 16:54:03,994 INFO L481 AbstractCegarLoop]: Abstraction has has 353 places, 379 transitions, 9459 flow [2020-10-11 16:54:03,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 16:54:03,994 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:03,994 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:04,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:04,201 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:04,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1082552, now seen corresponding path program 28 times [2020-10-11 16:54:04,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:04,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826463533] [2020-10-11 16:54:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:04,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826463533] [2020-10-11 16:54:04,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979390491] [2020-10-11 16:54:04,385 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 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 16:54:04,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:54:04,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:04,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 16:54:04,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:04,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:04,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:04,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 16:54:04,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837927051] [2020-10-11 16:54:04,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 16:54:04,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:04,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 16:54:04,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-11 16:54:04,990 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:04,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 379 transitions, 9459 flow. Second operand 18 states. [2020-10-11 16:54:04,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:04,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:04,991 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:05,933 INFO L129 PetriNetUnfolder]: 325/2397 cut-off events. [2020-10-11 16:54:05,934 INFO L130 PetriNetUnfolder]: For 162639/162930 co-relation queries the response was YES. [2020-10-11 16:54:05,965 INFO L80 FinitePrefix]: Finished finitePrefix Result has 15474 conditions, 2397 events. 325/2397 cut-off events. For 162639/162930 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 21446 event pairs, 0 based on Foata normal form. 95/2233 useless extension candidates. Maximal degree in co-relation 15314. Up to 405 conditions per place. [2020-10-11 16:54:05,977 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 115 selfloop transitions, 275 changer transitions 8/432 dead transitions. [2020-10-11 16:54:05,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 432 transitions, 13035 flow [2020-10-11 16:54:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 16:54:05,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-11 16:54:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1275 transitions. [2020-10-11 16:54:05,979 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.827922077922078 [2020-10-11 16:54:05,979 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1275 transitions. [2020-10-11 16:54:05,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1275 transitions. [2020-10-11 16:54:05,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:05,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1275 transitions. [2020-10-11 16:54:05,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-11 16:54:05,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-11 16:54:05,993 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-11 16:54:05,993 INFO L185 Difference]: Start difference. First operand has 353 places, 379 transitions, 9459 flow. Second operand 28 states and 1275 transitions. [2020-10-11 16:54:05,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 432 transitions, 13035 flow [2020-10-11 16:54:06,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 432 transitions, 12435 flow, removed 155 selfloop flow, removed 21 redundant places. [2020-10-11 16:54:06,397 INFO L241 Difference]: Finished difference. Result has 365 places, 399 transitions, 10440 flow [2020-10-11 16:54:06,397 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=8971, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10440, PETRI_PLACES=365, PETRI_TRANSITIONS=399} [2020-10-11 16:54:06,398 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 310 predicate places. [2020-10-11 16:54:06,398 INFO L481 AbstractCegarLoop]: Abstraction has has 365 places, 399 transitions, 10440 flow [2020-10-11 16:54:06,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 16:54:06,398 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:06,398 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:06,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-11 16:54:06,599 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:06,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1187091958, now seen corresponding path program 29 times [2020-10-11 16:54:06,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:06,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749706736] [2020-10-11 16:54:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:06,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749706736] [2020-10-11 16:54:06,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2370511] [2020-10-11 16:54:06,803 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 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 16:54:06,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 16:54:06,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:06,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 16:54:06,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:06,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:06,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:06,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 16:54:06,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914301073] [2020-10-11 16:54:06,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 16:54:06,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:06,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 16:54:06,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-11 16:54:07,056 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:07,056 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 399 transitions, 10440 flow. Second operand 18 states. [2020-10-11 16:54:07,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:07,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:07,057 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:08,234 INFO L129 PetriNetUnfolder]: 337/2484 cut-off events. [2020-10-11 16:54:08,234 INFO L130 PetriNetUnfolder]: For 180662/180962 co-relation queries the response was YES. [2020-10-11 16:54:08,262 INFO L80 FinitePrefix]: Finished finitePrefix Result has 16527 conditions, 2484 events. 337/2484 cut-off events. For 180662/180962 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 22467 event pairs, 0 based on Foata normal form. 128/2346 useless extension candidates. Maximal degree in co-relation 16361. Up to 421 conditions per place. [2020-10-11 16:54:08,275 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 88 selfloop transitions, 317 changer transitions 8/447 dead transitions. [2020-10-11 16:54:08,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 447 transitions, 14108 flow [2020-10-11 16:54:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 16:54:08,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-11 16:54:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1367 transitions. [2020-10-11 16:54:08,277 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8284848484848485 [2020-10-11 16:54:08,277 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1367 transitions. [2020-10-11 16:54:08,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1367 transitions. [2020-10-11 16:54:08,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:08,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1367 transitions. [2020-10-11 16:54:08,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-11 16:54:08,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-11 16:54:08,280 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-11 16:54:08,280 INFO L185 Difference]: Start difference. First operand has 365 places, 399 transitions, 10440 flow. Second operand 30 states and 1367 transitions. [2020-10-11 16:54:08,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 447 transitions, 14108 flow [2020-10-11 16:54:08,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 447 transitions, 13385 flow, removed 186 selfloop flow, removed 21 redundant places. [2020-10-11 16:54:08,726 INFO L241 Difference]: Finished difference. Result has 377 places, 414 transitions, 11213 flow [2020-10-11 16:54:08,727 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=9869, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=11213, PETRI_PLACES=377, PETRI_TRANSITIONS=414} [2020-10-11 16:54:08,727 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 322 predicate places. [2020-10-11 16:54:08,728 INFO L481 AbstractCegarLoop]: Abstraction has has 377 places, 414 transitions, 11213 flow [2020-10-11 16:54:08,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 16:54:08,728 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:08,728 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:08,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:08,943 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:08,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1366914558, now seen corresponding path program 30 times [2020-10-11 16:54:08,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:08,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982527040] [2020-10-11 16:54:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:09,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982527040] [2020-10-11 16:54:09,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203718060] [2020-10-11 16:54:09,146 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 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 16:54:09,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 16:54:09,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:09,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 16:54:09,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:09,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:54:09,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:09,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:09,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-11 16:54:09,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221252999] [2020-10-11 16:54:09,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 16:54:09,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:09,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 16:54:09,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-11 16:54:09,945 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:09,946 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 414 transitions, 11213 flow. Second operand 19 states. [2020-10-11 16:54:09,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:09,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:09,947 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:11,423 INFO L129 PetriNetUnfolder]: 343/2524 cut-off events. [2020-10-11 16:54:11,423 INFO L130 PetriNetUnfolder]: For 184054/184424 co-relation queries the response was YES. [2020-10-11 16:54:11,452 INFO L80 FinitePrefix]: Finished finitePrefix Result has 16974 conditions, 2524 events. 343/2524 cut-off events. For 184054/184424 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 23011 event pairs, 0 based on Foata normal form. 145/2400 useless extension candidates. Maximal degree in co-relation 16804. Up to 427 conditions per place. [2020-10-11 16:54:11,465 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 82 selfloop transitions, 331 changer transitions 8/455 dead transitions. [2020-10-11 16:54:11,465 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 455 transitions, 14791 flow [2020-10-11 16:54:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 16:54:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-11 16:54:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1504 transitions. [2020-10-11 16:54:11,467 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8286501377410468 [2020-10-11 16:54:11,467 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1504 transitions. [2020-10-11 16:54:11,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1504 transitions. [2020-10-11 16:54:11,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:11,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1504 transitions. [2020-10-11 16:54:11,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-11 16:54:11,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-11 16:54:11,470 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-11 16:54:11,470 INFO L185 Difference]: Start difference. First operand has 377 places, 414 transitions, 11213 flow. Second operand 33 states and 1504 transitions. [2020-10-11 16:54:11,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 455 transitions, 14791 flow [2020-10-11 16:54:11,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 455 transitions, 13929 flow, removed 190 selfloop flow, removed 23 redundant places. [2020-10-11 16:54:11,956 INFO L241 Difference]: Finished difference. Result has 389 places, 421 transitions, 11609 flow [2020-10-11 16:54:11,957 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=10491, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=11609, PETRI_PLACES=389, PETRI_TRANSITIONS=421} [2020-10-11 16:54:11,957 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 334 predicate places. [2020-10-11 16:54:11,958 INFO L481 AbstractCegarLoop]: Abstraction has has 389 places, 421 transitions, 11609 flow [2020-10-11 16:54:11,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 16:54:11,958 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:11,958 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:12,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-11 16:54:12,172 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:12,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:12,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2021098432, now seen corresponding path program 31 times [2020-10-11 16:54:12,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:12,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699817519] [2020-10-11 16:54:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:12,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699817519] [2020-10-11 16:54:12,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796957714] [2020-10-11 16:54:12,376 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 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 16:54:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:12,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 16:54:12,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:12,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:54:12,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:12,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:12,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-11 16:54:12,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313854695] [2020-10-11 16:54:12,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 16:54:12,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:12,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 16:54:12,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-10-11 16:54:13,315 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:13,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 421 transitions, 11609 flow. Second operand 19 states. [2020-10-11 16:54:13,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:13,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:13,316 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:15,108 INFO L129 PetriNetUnfolder]: 355/2579 cut-off events. [2020-10-11 16:54:15,108 INFO L130 PetriNetUnfolder]: For 199172/199580 co-relation queries the response was YES. [2020-10-11 16:54:15,148 INFO L80 FinitePrefix]: Finished finitePrefix Result has 17883 conditions, 2579 events. 355/2579 cut-off events. For 199172/199580 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 23610 event pairs, 0 based on Foata normal form. 151/2457 useless extension candidates. Maximal degree in co-relation 17710. Up to 439 conditions per place. [2020-10-11 16:54:15,162 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 80 selfloop transitions, 344 changer transitions 14/472 dead transitions. [2020-10-11 16:54:15,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 472 transitions, 16179 flow [2020-10-11 16:54:15,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 16:54:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-11 16:54:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1735 transitions. [2020-10-11 16:54:15,164 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8301435406698564 [2020-10-11 16:54:15,164 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1735 transitions. [2020-10-11 16:54:15,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1735 transitions. [2020-10-11 16:54:15,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:15,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1735 transitions. [2020-10-11 16:54:15,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 39 states. [2020-10-11 16:54:15,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 39 states. [2020-10-11 16:54:15,167 INFO L81 ComplementDD]: Finished complementDD. Result 39 states. [2020-10-11 16:54:15,167 INFO L185 Difference]: Start difference. First operand has 389 places, 421 transitions, 11609 flow. Second operand 38 states and 1735 transitions. [2020-10-11 16:54:15,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 472 transitions, 16179 flow [2020-10-11 16:54:15,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 472 transitions, 15177 flow, removed 211 selfloop flow, removed 29 redundant places. [2020-10-11 16:54:15,656 INFO L241 Difference]: Finished difference. Result has 405 places, 431 transitions, 12267 flow [2020-10-11 16:54:15,656 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=10783, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=12267, PETRI_PLACES=405, PETRI_TRANSITIONS=431} [2020-10-11 16:54:15,657 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 350 predicate places. [2020-10-11 16:54:15,657 INFO L481 AbstractCegarLoop]: Abstraction has has 405 places, 431 transitions, 12267 flow [2020-10-11 16:54:15,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 16:54:15,657 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:15,657 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:15,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-11 16:54:15,858 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:15,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:15,858 INFO L82 PathProgramCache]: Analyzing trace with hash -864193994, now seen corresponding path program 32 times [2020-10-11 16:54:15,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:15,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894125087] [2020-10-11 16:54:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:54:16,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894125087] [2020-10-11 16:54:16,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014098356] [2020-10-11 16:54:16,038 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 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 16:54:16,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:54:16,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:16,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 16:54:16,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:16,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:16,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:54:16,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:16,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-11 16:54:16,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219322360] [2020-10-11 16:54:16,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 16:54:16,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:16,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 16:54:16,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-11 16:54:16,792 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:16,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 431 transitions, 12267 flow. Second operand 19 states. [2020-10-11 16:54:16,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:16,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:16,793 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:19,078 INFO L129 PetriNetUnfolder]: 384/2795 cut-off events. [2020-10-11 16:54:19,079 INFO L130 PetriNetUnfolder]: For 274304/274724 co-relation queries the response was YES. [2020-10-11 16:54:19,107 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21058 conditions, 2795 events. 384/2795 cut-off events. For 274304/274724 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 25821 event pairs, 0 based on Foata normal form. 151/2649 useless extension candidates. Maximal degree in co-relation 20877. Up to 487 conditions per place. [2020-10-11 16:54:19,124 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 128 selfloop transitions, 333 changer transitions 11/506 dead transitions. [2020-10-11 16:54:19,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 506 transitions, 18212 flow [2020-10-11 16:54:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 16:54:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-11 16:54:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1643 transitions. [2020-10-11 16:54:19,126 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8297979797979798 [2020-10-11 16:54:19,126 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1643 transitions. [2020-10-11 16:54:19,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1643 transitions. [2020-10-11 16:54:19,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:19,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1643 transitions. [2020-10-11 16:54:19,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-11 16:54:19,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-11 16:54:19,129 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-11 16:54:19,130 INFO L185 Difference]: Start difference. First operand has 405 places, 431 transitions, 12267 flow. Second operand 36 states and 1643 transitions. [2020-10-11 16:54:19,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 506 transitions, 18212 flow [2020-10-11 16:54:19,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 506 transitions, 16354 flow, removed 635 selfloop flow, removed 30 redundant places. [2020-10-11 16:54:19,746 INFO L241 Difference]: Finished difference. Result has 416 places, 464 transitions, 13721 flow [2020-10-11 16:54:19,746 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=11141, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13721, PETRI_PLACES=416, PETRI_TRANSITIONS=464} [2020-10-11 16:54:19,747 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 361 predicate places. [2020-10-11 16:54:19,747 INFO L481 AbstractCegarLoop]: Abstraction has has 416 places, 464 transitions, 13721 flow [2020-10-11 16:54:19,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 16:54:19,747 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:19,747 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:19,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 16:54:19,961 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:19,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1113175958, now seen corresponding path program 33 times [2020-10-11 16:54:19,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:19,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639216340] [2020-10-11 16:54:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:54:20,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639216340] [2020-10-11 16:54:20,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923969784] [2020-10-11 16:54:20,145 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 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 16:54:20,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 16:54:20,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:20,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 16:54:20,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:20,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:20,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:54:20,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:20,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 16:54:20,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632116033] [2020-10-11 16:54:20,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 16:54:20,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:20,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 16:54:20,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-10-11 16:54:21,001 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:21,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 464 transitions, 13721 flow. Second operand 19 states. [2020-10-11 16:54:21,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:21,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:21,002 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:22,411 INFO L129 PetriNetUnfolder]: 383/2808 cut-off events. [2020-10-11 16:54:22,411 INFO L130 PetriNetUnfolder]: For 284152/284516 co-relation queries the response was YES. [2020-10-11 16:54:22,466 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21052 conditions, 2808 events. 383/2808 cut-off events. For 284152/284516 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 25885 event pairs, 0 based on Foata normal form. 155/2665 useless extension candidates. Maximal degree in co-relation 20865. Up to 479 conditions per place. [2020-10-11 16:54:22,484 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 90 selfloop transitions, 370 changer transitions 5/499 dead transitions. [2020-10-11 16:54:22,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 499 transitions, 17573 flow [2020-10-11 16:54:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 16:54:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-11 16:54:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1413 transitions. [2020-10-11 16:54:22,486 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8287390029325513 [2020-10-11 16:54:22,486 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1413 transitions. [2020-10-11 16:54:22,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1413 transitions. [2020-10-11 16:54:22,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:22,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1413 transitions. [2020-10-11 16:54:22,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-11 16:54:22,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-11 16:54:22,488 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-11 16:54:22,489 INFO L185 Difference]: Start difference. First operand has 416 places, 464 transitions, 13721 flow. Second operand 31 states and 1413 transitions. [2020-10-11 16:54:22,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 499 transitions, 17573 flow [2020-10-11 16:54:23,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 499 transitions, 16484 flow, removed 380 selfloop flow, removed 26 redundant places. [2020-10-11 16:54:23,342 INFO L241 Difference]: Finished difference. Result has 420 places, 467 transitions, 13841 flow [2020-10-11 16:54:23,343 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=12812, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=13841, PETRI_PLACES=420, PETRI_TRANSITIONS=467} [2020-10-11 16:54:23,343 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 365 predicate places. [2020-10-11 16:54:23,343 INFO L481 AbstractCegarLoop]: Abstraction has has 420 places, 467 transitions, 13841 flow [2020-10-11 16:54:23,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 16:54:23,343 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:23,343 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:23,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 16:54:23,544 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:23,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2082151109, now seen corresponding path program 34 times [2020-10-11 16:54:23,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:23,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461463587] [2020-10-11 16:54:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:23,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461463587] [2020-10-11 16:54:23,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573398219] [2020-10-11 16:54:23,804 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 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 16:54:23,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:54:23,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:23,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:54:23,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:23,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:23,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:23,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 16:54:23,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162295919] [2020-10-11 16:54:23,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 16:54:23,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:23,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 16:54:23,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-11 16:54:24,068 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:24,069 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 467 transitions, 13841 flow. Second operand 19 states. [2020-10-11 16:54:24,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:24,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:24,070 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:25,132 INFO L129 PetriNetUnfolder]: 389/2847 cut-off events. [2020-10-11 16:54:25,132 INFO L130 PetriNetUnfolder]: For 267182/267539 co-relation queries the response was YES. [2020-10-11 16:54:25,176 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21024 conditions, 2847 events. 389/2847 cut-off events. For 267182/267539 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 26179 event pairs, 0 based on Foata normal form. 66/2605 useless extension candidates. Maximal degree in co-relation 20837. Up to 608 conditions per place. [2020-10-11 16:54:25,192 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 393 selfloop transitions, 69 changer transitions 8/504 dead transitions. [2020-10-11 16:54:25,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 504 transitions, 17140 flow [2020-10-11 16:54:25,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 16:54:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-11 16:54:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1046 transitions. [2020-10-11 16:54:25,194 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8268774703557312 [2020-10-11 16:54:25,194 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1046 transitions. [2020-10-11 16:54:25,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1046 transitions. [2020-10-11 16:54:25,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:25,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1046 transitions. [2020-10-11 16:54:25,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-11 16:54:25,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-11 16:54:25,196 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-11 16:54:25,196 INFO L185 Difference]: Start difference. First operand has 420 places, 467 transitions, 13841 flow. Second operand 23 states and 1046 transitions. [2020-10-11 16:54:25,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 504 transitions, 17140 flow [2020-10-11 16:54:25,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 504 transitions, 16254 flow, removed 141 selfloop flow, removed 27 redundant places. [2020-10-11 16:54:26,001 INFO L241 Difference]: Finished difference. Result has 418 places, 471 transitions, 13461 flow [2020-10-11 16:54:26,001 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=13071, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=13461, PETRI_PLACES=418, PETRI_TRANSITIONS=471} [2020-10-11 16:54:26,002 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 363 predicate places. [2020-10-11 16:54:26,002 INFO L481 AbstractCegarLoop]: Abstraction has has 418 places, 471 transitions, 13461 flow [2020-10-11 16:54:26,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 16:54:26,002 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:26,002 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:26,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:26,217 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:26,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:26,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1221332835, now seen corresponding path program 35 times [2020-10-11 16:54:26,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:26,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202799670] [2020-10-11 16:54:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:26,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202799670] [2020-10-11 16:54:26,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093981283] [2020-10-11 16:54:26,495 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 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 16:54:26,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 16:54:26,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:26,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 16:54:26,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:26,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:54:26,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:26,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:26,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 16:54:26,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912340870] [2020-10-11 16:54:26,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:54:26,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:26,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:54:26,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:54:27,063 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:27,064 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 471 transitions, 13461 flow. Second operand 20 states. [2020-10-11 16:54:27,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:27,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:27,064 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:28,358 INFO L129 PetriNetUnfolder]: 407/3002 cut-off events. [2020-10-11 16:54:28,358 INFO L130 PetriNetUnfolder]: For 287349/287721 co-relation queries the response was YES. [2020-10-11 16:54:28,408 INFO L80 FinitePrefix]: Finished finitePrefix Result has 22100 conditions, 3002 events. 407/3002 cut-off events. For 287349/287721 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 28048 event pairs, 0 based on Foata normal form. 93/2770 useless extension candidates. Maximal degree in co-relation 21910. Up to 511 conditions per place. [2020-10-11 16:54:28,426 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 269 selfloop transitions, 212 changer transitions 8/523 dead transitions. [2020-10-11 16:54:28,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 523 transitions, 17749 flow [2020-10-11 16:54:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 16:54:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-11 16:54:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1318 transitions. [2020-10-11 16:54:28,428 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.826332288401254 [2020-10-11 16:54:28,428 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1318 transitions. [2020-10-11 16:54:28,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1318 transitions. [2020-10-11 16:54:28,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:28,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1318 transitions. [2020-10-11 16:54:28,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-11 16:54:28,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-11 16:54:28,431 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-11 16:54:28,431 INFO L185 Difference]: Start difference. First operand has 418 places, 471 transitions, 13461 flow. Second operand 29 states and 1318 transitions. [2020-10-11 16:54:28,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 523 transitions, 17749 flow [2020-10-11 16:54:29,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 523 transitions, 17400 flow, removed 110 selfloop flow, removed 20 redundant places. [2020-10-11 16:54:29,251 INFO L241 Difference]: Finished difference. Result has 432 places, 489 transitions, 14761 flow [2020-10-11 16:54:29,252 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=13216, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14761, PETRI_PLACES=432, PETRI_TRANSITIONS=489} [2020-10-11 16:54:29,252 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 377 predicate places. [2020-10-11 16:54:29,252 INFO L481 AbstractCegarLoop]: Abstraction has has 432 places, 489 transitions, 14761 flow [2020-10-11 16:54:29,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:54:29,252 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:29,252 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:29,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-11 16:54:29,453 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:29,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:29,454 INFO L82 PathProgramCache]: Analyzing trace with hash -531277995, now seen corresponding path program 36 times [2020-10-11 16:54:29,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:29,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102625930] [2020-10-11 16:54:29,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:29,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102625930] [2020-10-11 16:54:29,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095484419] [2020-10-11 16:54:29,682 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 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 16:54:29,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 16:54:29,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:29,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 16:54:29,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:29,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:54:29,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:29,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:29,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 16:54:29,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643492827] [2020-10-11 16:54:29,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:54:29,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:29,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:54:29,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:54:29,888 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:29,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 489 transitions, 14761 flow. Second operand 20 states. [2020-10-11 16:54:29,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:29,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:29,889 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:31,327 INFO L129 PetriNetUnfolder]: 411/3038 cut-off events. [2020-10-11 16:54:31,327 INFO L130 PetriNetUnfolder]: For 296823/297192 co-relation queries the response was YES. [2020-10-11 16:54:31,376 INFO L80 FinitePrefix]: Finished finitePrefix Result has 22671 conditions, 3038 events. 411/3038 cut-off events. For 296823/297192 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 28341 event pairs, 0 based on Foata normal form. 110/2819 useless extension candidates. Maximal degree in co-relation 22475. Up to 517 conditions per place. [2020-10-11 16:54:31,393 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 199 selfloop transitions, 286 changer transitions 8/527 dead transitions. [2020-10-11 16:54:31,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 527 transitions, 18520 flow [2020-10-11 16:54:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 16:54:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-11 16:54:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1410 transitions. [2020-10-11 16:54:31,395 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8269794721407625 [2020-10-11 16:54:31,395 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1410 transitions. [2020-10-11 16:54:31,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1410 transitions. [2020-10-11 16:54:31,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:31,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1410 transitions. [2020-10-11 16:54:31,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-11 16:54:31,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-11 16:54:31,398 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-11 16:54:31,398 INFO L185 Difference]: Start difference. First operand has 432 places, 489 transitions, 14761 flow. Second operand 31 states and 1410 transitions. [2020-10-11 16:54:31,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 527 transitions, 18520 flow [2020-10-11 16:54:32,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 527 transitions, 18000 flow, removed 134 selfloop flow, removed 21 redundant places. [2020-10-11 16:54:32,224 INFO L241 Difference]: Finished difference. Result has 443 places, 493 transitions, 15220 flow [2020-10-11 16:54:32,225 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=14365, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=15220, PETRI_PLACES=443, PETRI_TRANSITIONS=493} [2020-10-11 16:54:32,225 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 388 predicate places. [2020-10-11 16:54:32,225 INFO L481 AbstractCegarLoop]: Abstraction has has 443 places, 493 transitions, 15220 flow [2020-10-11 16:54:32,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:54:32,225 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:32,226 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:32,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-10-11 16:54:32,431 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:32,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:32,431 INFO L82 PathProgramCache]: Analyzing trace with hash -588339521, now seen corresponding path program 37 times [2020-10-11 16:54:32,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:32,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716883867] [2020-10-11 16:54:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:32,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716883867] [2020-10-11 16:54:32,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11211497] [2020-10-11 16:54:32,694 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 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 16:54:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:32,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 16:54:32,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:32,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:54:32,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:32,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:32,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 16:54:32,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622114143] [2020-10-11 16:54:32,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:54:32,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:32,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:54:32,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:54:33,872 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:33,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 493 transitions, 15220 flow. Second operand 20 states. [2020-10-11 16:54:33,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:33,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:33,873 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:35,517 INFO L129 PetriNetUnfolder]: 431/3225 cut-off events. [2020-10-11 16:54:35,518 INFO L130 PetriNetUnfolder]: For 313860/314223 co-relation queries the response was YES. [2020-10-11 16:54:35,564 INFO L80 FinitePrefix]: Finished finitePrefix Result has 24149 conditions, 3225 events. 431/3225 cut-off events. For 313860/314223 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 30777 event pairs, 0 based on Foata normal form. 128/3006 useless extension candidates. Maximal degree in co-relation 23951. Up to 549 conditions per place. [2020-10-11 16:54:35,582 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 156 selfloop transitions, 353 changer transitions 8/551 dead transitions. [2020-10-11 16:54:35,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 551 transitions, 19937 flow [2020-10-11 16:54:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 16:54:35,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-11 16:54:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1502 transitions. [2020-10-11 16:54:35,584 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8275482093663912 [2020-10-11 16:54:35,584 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1502 transitions. [2020-10-11 16:54:35,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1502 transitions. [2020-10-11 16:54:35,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:35,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1502 transitions. [2020-10-11 16:54:35,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-11 16:54:35,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-11 16:54:35,587 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-11 16:54:35,587 INFO L185 Difference]: Start difference. First operand has 443 places, 493 transitions, 15220 flow. Second operand 33 states and 1502 transitions. [2020-10-11 16:54:35,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 551 transitions, 19937 flow [2020-10-11 16:54:36,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 551 transitions, 19113 flow, removed 126 selfloop flow, removed 29 redundant places. [2020-10-11 16:54:36,425 INFO L241 Difference]: Finished difference. Result has 453 places, 514 transitions, 16523 flow [2020-10-11 16:54:36,426 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=14532, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=16523, PETRI_PLACES=453, PETRI_TRANSITIONS=514} [2020-10-11 16:54:36,426 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 398 predicate places. [2020-10-11 16:54:36,427 INFO L481 AbstractCegarLoop]: Abstraction has has 453 places, 514 transitions, 16523 flow [2020-10-11 16:54:36,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:54:36,427 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:36,427 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:36,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:36,636 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:36,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1240188983, now seen corresponding path program 38 times [2020-10-11 16:54:36,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:36,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273490105] [2020-10-11 16:54:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:36,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273490105] [2020-10-11 16:54:36,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018214642] [2020-10-11 16:54:36,852 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 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 16:54:36,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:54:36,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:36,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 16:54:36,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:36,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:36,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:36,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 16:54:36,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961771008] [2020-10-11 16:54:36,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 16:54:36,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:36,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 16:54:36,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-11 16:54:37,693 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:37,694 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 514 transitions, 16523 flow. Second operand 19 states. [2020-10-11 16:54:37,694 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:37,694 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:37,694 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:39,227 INFO L129 PetriNetUnfolder]: 435/3268 cut-off events. [2020-10-11 16:54:39,227 INFO L130 PetriNetUnfolder]: For 330289/330628 co-relation queries the response was YES. [2020-10-11 16:54:39,281 INFO L80 FinitePrefix]: Finished finitePrefix Result has 24813 conditions, 3268 events. 435/3268 cut-off events. For 330289/330628 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 31254 event pairs, 0 based on Foata normal form. 151/3067 useless extension candidates. Maximal degree in co-relation 24608. Up to 555 conditions per place. [2020-10-11 16:54:39,301 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 131 selfloop transitions, 381 changer transitions 8/554 dead transitions. [2020-10-11 16:54:39,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 554 transitions, 20626 flow [2020-10-11 16:54:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 16:54:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-11 16:54:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1457 transitions. [2020-10-11 16:54:39,303 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8278409090909091 [2020-10-11 16:54:39,303 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1457 transitions. [2020-10-11 16:54:39,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1457 transitions. [2020-10-11 16:54:39,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:39,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1457 transitions. [2020-10-11 16:54:39,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-11 16:54:39,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-11 16:54:39,306 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-11 16:54:39,306 INFO L185 Difference]: Start difference. First operand has 453 places, 514 transitions, 16523 flow. Second operand 32 states and 1457 transitions. [2020-10-11 16:54:39,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 554 transitions, 20626 flow [2020-10-11 16:54:40,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 554 transitions, 19840 flow, removed 177 selfloop flow, removed 26 redundant places. [2020-10-11 16:54:40,349 INFO L241 Difference]: Finished difference. Result has 460 places, 518 transitions, 16905 flow [2020-10-11 16:54:40,350 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=15833, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=16905, PETRI_PLACES=460, PETRI_TRANSITIONS=518} [2020-10-11 16:54:40,350 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 405 predicate places. [2020-10-11 16:54:40,350 INFO L481 AbstractCegarLoop]: Abstraction has has 460 places, 518 transitions, 16905 flow [2020-10-11 16:54:40,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 16:54:40,350 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:40,351 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:40,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-11 16:54:40,551 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:40,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:40,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1120893425, now seen corresponding path program 39 times [2020-10-11 16:54:40,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:40,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584514357] [2020-10-11 16:54:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:40,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584514357] [2020-10-11 16:54:40,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410725512] [2020-10-11 16:54:40,821 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:40,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 16:54:40,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 16:54:40,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:40,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:54:40,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:40,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:40,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 16:54:40,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000323509] [2020-10-11 16:54:40,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:54:40,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:40,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:54:40,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:54:41,640 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:41,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 518 transitions, 16905 flow. Second operand 20 states. [2020-10-11 16:54:41,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:41,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:41,641 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:43,511 INFO L129 PetriNetUnfolder]: 439/3297 cut-off events. [2020-10-11 16:54:43,511 INFO L130 PetriNetUnfolder]: For 340777/341146 co-relation queries the response was YES. [2020-10-11 16:54:43,568 INFO L80 FinitePrefix]: Finished finitePrefix Result has 25335 conditions, 3297 events. 439/3297 cut-off events. For 340777/341146 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 31615 event pairs, 0 based on Foata normal form. 158/3100 useless extension candidates. Maximal degree in co-relation 25128. Up to 557 conditions per place. [2020-10-11 16:54:43,589 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 116 selfloop transitions, 401 changer transitions 8/559 dead transitions. [2020-10-11 16:54:43,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 559 transitions, 21152 flow [2020-10-11 16:54:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 16:54:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-11 16:54:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1594 transitions. [2020-10-11 16:54:43,591 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.828051948051948 [2020-10-11 16:54:43,591 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1594 transitions. [2020-10-11 16:54:43,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1594 transitions. [2020-10-11 16:54:43,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:43,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1594 transitions. [2020-10-11 16:54:43,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-11 16:54:43,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-11 16:54:43,596 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-11 16:54:43,596 INFO L185 Difference]: Start difference. First operand has 460 places, 518 transitions, 16905 flow. Second operand 35 states and 1594 transitions. [2020-10-11 16:54:43,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 559 transitions, 21152 flow [2020-10-11 16:54:44,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 559 transitions, 20343 flow, removed 155 selfloop flow, removed 26 redundant places. [2020-10-11 16:54:44,511 INFO L241 Difference]: Finished difference. Result has 470 places, 522 transitions, 17395 flow [2020-10-11 16:54:44,511 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=16278, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=17395, PETRI_PLACES=470, PETRI_TRANSITIONS=522} [2020-10-11 16:54:44,512 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 415 predicate places. [2020-10-11 16:54:44,512 INFO L481 AbstractCegarLoop]: Abstraction has has 470 places, 522 transitions, 17395 flow [2020-10-11 16:54:44,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:54:44,512 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:44,512 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:44,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:44,713 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:44,713 INFO L82 PathProgramCache]: Analyzing trace with hash -944270269, now seen corresponding path program 40 times [2020-10-11 16:54:44,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:44,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44558827] [2020-10-11 16:54:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:44,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44558827] [2020-10-11 16:54:44,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674819716] [2020-10-11 16:54:44,967 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:45,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:54:45,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:45,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:54:45,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:45,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:54:45,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:45,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:45,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 16:54:45,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47451545] [2020-10-11 16:54:45,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:54:45,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:45,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:54:45,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:54:45,501 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:45,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 522 transitions, 17395 flow. Second operand 20 states. [2020-10-11 16:54:45,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:45,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:45,503 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:47,341 INFO L129 PetriNetUnfolder]: 445/3351 cut-off events. [2020-10-11 16:54:47,341 INFO L130 PetriNetUnfolder]: For 338461/338829 co-relation queries the response was YES. [2020-10-11 16:54:47,407 INFO L80 FinitePrefix]: Finished finitePrefix Result has 25728 conditions, 3351 events. 445/3351 cut-off events. For 338461/338829 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 32129 event pairs, 0 based on Foata normal form. 167/3159 useless extension candidates. Maximal degree in co-relation 25519. Up to 567 conditions per place. [2020-10-11 16:54:47,428 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 91 selfloop transitions, 434 changer transitions 8/567 dead transitions. [2020-10-11 16:54:47,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 567 transitions, 21975 flow [2020-10-11 16:54:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 16:54:47,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-11 16:54:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1686 transitions. [2020-10-11 16:54:47,435 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8285012285012285 [2020-10-11 16:54:47,435 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1686 transitions. [2020-10-11 16:54:47,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1686 transitions. [2020-10-11 16:54:47,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:47,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1686 transitions. [2020-10-11 16:54:47,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-11 16:54:47,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-11 16:54:47,438 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-11 16:54:47,438 INFO L185 Difference]: Start difference. First operand has 470 places, 522 transitions, 17395 flow. Second operand 37 states and 1686 transitions. [2020-10-11 16:54:47,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 567 transitions, 21975 flow [2020-10-11 16:54:48,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 567 transitions, 20969 flow, removed 135 selfloop flow, removed 32 redundant places. [2020-10-11 16:54:48,449 INFO L241 Difference]: Finished difference. Result has 477 places, 529 transitions, 17929 flow [2020-10-11 16:54:48,450 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=16541, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17929, PETRI_PLACES=477, PETRI_TRANSITIONS=529} [2020-10-11 16:54:48,450 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 422 predicate places. [2020-10-11 16:54:48,450 INFO L481 AbstractCegarLoop]: Abstraction has has 477 places, 529 transitions, 17929 flow [2020-10-11 16:54:48,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:54:48,450 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:48,450 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:48,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-11 16:54:48,664 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:48,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1164391295, now seen corresponding path program 41 times [2020-10-11 16:54:48,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:48,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4496943] [2020-10-11 16:54:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:48,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4496943] [2020-10-11 16:54:48,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282250550] [2020-10-11 16:54:48,876 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:48,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 16:54:48,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:48,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 16:54:48,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:48,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:54:48,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:48,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:48,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 16:54:48,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780055670] [2020-10-11 16:54:48,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:54:48,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:48,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:54:48,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:54:49,553 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:49,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 529 transitions, 17929 flow. Second operand 20 states. [2020-10-11 16:54:49,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:49,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:49,554 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:51,499 INFO L129 PetriNetUnfolder]: 451/3382 cut-off events. [2020-10-11 16:54:51,499 INFO L130 PetriNetUnfolder]: For 356035/356434 co-relation queries the response was YES. [2020-10-11 16:54:51,553 INFO L80 FinitePrefix]: Finished finitePrefix Result has 26394 conditions, 3382 events. 451/3382 cut-off events. For 356035/356434 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 32511 event pairs, 0 based on Foata normal form. 175/3196 useless extension candidates. Maximal degree in co-relation 26182. Up to 575 conditions per place. [2020-10-11 16:54:51,574 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 90 selfloop transitions, 442 changer transitions 8/574 dead transitions. [2020-10-11 16:54:51,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 574 transitions, 22715 flow [2020-10-11 16:54:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 16:54:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-11 16:54:51,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1733 transitions. [2020-10-11 16:54:51,576 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8291866028708134 [2020-10-11 16:54:51,576 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1733 transitions. [2020-10-11 16:54:51,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1733 transitions. [2020-10-11 16:54:51,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:51,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1733 transitions. [2020-10-11 16:54:51,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 39 states. [2020-10-11 16:54:51,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 39 states. [2020-10-11 16:54:51,579 INFO L81 ComplementDD]: Finished complementDD. Result 39 states. [2020-10-11 16:54:51,579 INFO L185 Difference]: Start difference. First operand has 477 places, 529 transitions, 17929 flow. Second operand 38 states and 1733 transitions. [2020-10-11 16:54:51,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 574 transitions, 22715 flow [2020-10-11 16:54:52,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 574 transitions, 21557 flow, removed 192 selfloop flow, removed 32 redundant places. [2020-10-11 16:54:52,524 INFO L241 Difference]: Finished difference. Result has 486 places, 535 transitions, 18289 flow [2020-10-11 16:54:52,525 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=16885, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=18289, PETRI_PLACES=486, PETRI_TRANSITIONS=535} [2020-10-11 16:54:52,525 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 431 predicate places. [2020-10-11 16:54:52,525 INFO L481 AbstractCegarLoop]: Abstraction has has 486 places, 535 transitions, 18289 flow [2020-10-11 16:54:52,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:54:52,525 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:52,525 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:52,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:52,727 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:52,728 INFO L82 PathProgramCache]: Analyzing trace with hash -671988970, now seen corresponding path program 42 times [2020-10-11 16:54:52,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:52,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574390727] [2020-10-11 16:54:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:53,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574390727] [2020-10-11 16:54:53,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596443930] [2020-10-11 16:54:53,005 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:53,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 16:54:53,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:54:53,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 16:54:53,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:53,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:53,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:53,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 16:54:53,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26486211] [2020-10-11 16:54:53,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:54:53,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:53,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:54:53,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:54:53,798 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:53,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 535 transitions, 18289 flow. Second operand 20 states. [2020-10-11 16:54:53,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:53,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:53,800 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:55,364 INFO L129 PetriNetUnfolder]: 455/3411 cut-off events. [2020-10-11 16:54:55,364 INFO L130 PetriNetUnfolder]: For 381541/381925 co-relation queries the response was YES. [2020-10-11 16:54:55,407 INFO L80 FinitePrefix]: Finished finitePrefix Result has 27186 conditions, 3411 events. 455/3411 cut-off events. For 381541/381925 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 32672 event pairs, 0 based on Foata normal form. 64/3108 useless extension candidates. Maximal degree in co-relation 26970. Up to 792 conditions per place. [2020-10-11 16:54:55,429 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 489 selfloop transitions, 37 changer transitions 8/568 dead transitions. [2020-10-11 16:54:55,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 568 transitions, 21789 flow [2020-10-11 16:54:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 16:54:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-11 16:54:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1045 transitions. [2020-10-11 16:54:55,430 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8260869565217391 [2020-10-11 16:54:55,430 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1045 transitions. [2020-10-11 16:54:55,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1045 transitions. [2020-10-11 16:54:55,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:55,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1045 transitions. [2020-10-11 16:54:55,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-11 16:54:55,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-11 16:54:55,432 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-11 16:54:55,432 INFO L185 Difference]: Start difference. First operand has 486 places, 535 transitions, 18289 flow. Second operand 23 states and 1045 transitions. [2020-10-11 16:54:55,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 568 transitions, 21789 flow [2020-10-11 16:54:56,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 568 transitions, 20699 flow, removed 158 selfloop flow, removed 33 redundant places. [2020-10-11 16:54:56,524 INFO L241 Difference]: Finished difference. Result has 479 places, 539 transitions, 17691 flow [2020-10-11 16:54:56,524 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=17271, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=17691, PETRI_PLACES=479, PETRI_TRANSITIONS=539} [2020-10-11 16:54:56,524 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 424 predicate places. [2020-10-11 16:54:56,524 INFO L481 AbstractCegarLoop]: Abstraction has has 479 places, 539 transitions, 17691 flow [2020-10-11 16:54:56,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:54:56,525 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:54:56,525 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:54:56,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-11 16:54:56,726 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:54:56,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:54:56,726 INFO L82 PathProgramCache]: Analyzing trace with hash 800890776, now seen corresponding path program 43 times [2020-10-11 16:54:56,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:54:56,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258153956] [2020-10-11 16:54:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:54:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:57,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258153956] [2020-10-11 16:54:57,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064533655] [2020-10-11 16:54:57,011 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:54:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:54:57,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 16:54:57,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:54:57,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:54:57,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:54:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:54:57,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:54:57,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 16:54:57,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635934151] [2020-10-11 16:54:57,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 16:54:57,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:54:57,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 16:54:57,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-11 16:54:57,336 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:54:57,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 539 transitions, 17691 flow. Second operand 21 states. [2020-10-11 16:54:57,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:54:57,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:54:57,337 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:54:58,870 INFO L129 PetriNetUnfolder]: 461/3465 cut-off events. [2020-10-11 16:54:58,870 INFO L130 PetriNetUnfolder]: For 389305/389660 co-relation queries the response was YES. [2020-10-11 16:54:58,934 INFO L80 FinitePrefix]: Finished finitePrefix Result has 27358 conditions, 3465 events. 461/3465 cut-off events. For 389305/389660 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 33196 event pairs, 0 based on Foata normal form. 67/3159 useless extension candidates. Maximal degree in co-relation 27138. Up to 748 conditions per place. [2020-10-11 16:54:58,957 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 466 selfloop transitions, 67 changer transitions 8/575 dead transitions. [2020-10-11 16:54:58,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 575 transitions, 21417 flow [2020-10-11 16:54:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 16:54:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-11 16:54:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1182 transitions. [2020-10-11 16:54:58,959 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8265734265734266 [2020-10-11 16:54:58,959 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1182 transitions. [2020-10-11 16:54:58,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1182 transitions. [2020-10-11 16:54:58,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:54:58,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1182 transitions. [2020-10-11 16:54:58,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-11 16:54:58,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-11 16:54:58,961 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-11 16:54:58,961 INFO L185 Difference]: Start difference. First operand has 479 places, 539 transitions, 17691 flow. Second operand 26 states and 1182 transitions. [2020-10-11 16:54:58,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 575 transitions, 21417 flow [2020-10-11 16:54:59,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 575 transitions, 21145 flow, removed 113 selfloop flow, removed 14 redundant places. [2020-10-11 16:55:00,005 INFO L241 Difference]: Finished difference. Result has 494 places, 545 transitions, 18106 flow [2020-10-11 16:55:00,006 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=17519, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=18106, PETRI_PLACES=494, PETRI_TRANSITIONS=545} [2020-10-11 16:55:00,006 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 439 predicate places. [2020-10-11 16:55:00,006 INFO L481 AbstractCegarLoop]: Abstraction has has 494 places, 545 transitions, 18106 flow [2020-10-11 16:55:00,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 16:55:00,006 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:55:00,007 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:55:00,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-11 16:55:00,221 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:55:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:55:00,222 INFO L82 PathProgramCache]: Analyzing trace with hash -199007766, now seen corresponding path program 44 times [2020-10-11 16:55:00,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:55:00,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923863254] [2020-10-11 16:55:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:55:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:00,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923863254] [2020-10-11 16:55:00,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658091302] [2020-10-11 16:55:00,542 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:00,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:55:00,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:55:00,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 16:55:00,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:55:00,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:55:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:00,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:55:00,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 16:55:00,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308341360] [2020-10-11 16:55:00,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:55:00,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:55:00,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:55:00,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:55:00,832 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:55:00,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 545 transitions, 18106 flow. Second operand 20 states. [2020-10-11 16:55:00,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:55:00,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:55:00,833 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:55:02,372 INFO L129 PetriNetUnfolder]: 467/3512 cut-off events. [2020-10-11 16:55:02,372 INFO L130 PetriNetUnfolder]: For 395273/395666 co-relation queries the response was YES. [2020-10-11 16:55:02,434 INFO L80 FinitePrefix]: Finished finitePrefix Result has 27867 conditions, 3512 events. 467/3512 cut-off events. For 395273/395666 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 33738 event pairs, 0 based on Foata normal form. 74/3208 useless extension candidates. Maximal degree in co-relation 27643. Up to 705 conditions per place. [2020-10-11 16:55:02,456 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 441 selfloop transitions, 98 changer transitions 8/581 dead transitions. [2020-10-11 16:55:02,457 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 581 transitions, 21849 flow [2020-10-11 16:55:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 16:55:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-11 16:55:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1228 transitions. [2020-10-11 16:55:02,458 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.826936026936027 [2020-10-11 16:55:02,458 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1228 transitions. [2020-10-11 16:55:02,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1228 transitions. [2020-10-11 16:55:02,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:55:02,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1228 transitions. [2020-10-11 16:55:02,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-11 16:55:02,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-11 16:55:02,460 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-11 16:55:02,460 INFO L185 Difference]: Start difference. First operand has 494 places, 545 transitions, 18106 flow. Second operand 27 states and 1228 transitions. [2020-10-11 16:55:02,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 581 transitions, 21849 flow [2020-10-11 16:55:03,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 581 transitions, 21549 flow, removed 111 selfloop flow, removed 17 redundant places. [2020-10-11 16:55:03,595 INFO L241 Difference]: Finished difference. Result has 507 places, 551 transitions, 18576 flow [2020-10-11 16:55:03,596 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=17906, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=18576, PETRI_PLACES=507, PETRI_TRANSITIONS=551} [2020-10-11 16:55:03,596 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 452 predicate places. [2020-10-11 16:55:03,596 INFO L481 AbstractCegarLoop]: Abstraction has has 507 places, 551 transitions, 18576 flow [2020-10-11 16:55:03,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:55:03,596 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:55:03,597 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:55:03,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:03,799 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:55:03,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:55:03,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1676260244, now seen corresponding path program 45 times [2020-10-11 16:55:03,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:55:03,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818915802] [2020-10-11 16:55:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:55:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:04,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818915802] [2020-10-11 16:55:04,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126168557] [2020-10-11 16:55:04,058 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:04,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 16:55:04,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:55:04,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 16:55:04,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:55:04,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:55:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:04,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:55:04,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 16:55:04,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212377501] [2020-10-11 16:55:04,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:55:04,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:55:04,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:55:04,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:55:04,331 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:55:04,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 551 transitions, 18576 flow. Second operand 20 states. [2020-10-11 16:55:04,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:55:04,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:55:04,333 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:55:06,152 INFO L129 PetriNetUnfolder]: 475/3591 cut-off events. [2020-10-11 16:55:06,153 INFO L130 PetriNetUnfolder]: For 405936/406291 co-relation queries the response was YES. [2020-10-11 16:55:06,201 INFO L80 FinitePrefix]: Finished finitePrefix Result has 28584 conditions, 3591 events. 475/3591 cut-off events. For 405936/406291 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 34606 event pairs, 0 based on Foata normal form. 90/3294 useless extension candidates. Maximal degree in co-relation 28356. Up to 613 conditions per place. [2020-10-11 16:55:06,224 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 371 selfloop transitions, 182 changer transitions 8/595 dead transitions. [2020-10-11 16:55:06,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 595 transitions, 22683 flow [2020-10-11 16:55:06,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 16:55:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-11 16:55:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1363 transitions. [2020-10-11 16:55:06,226 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.826060606060606 [2020-10-11 16:55:06,226 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1363 transitions. [2020-10-11 16:55:06,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1363 transitions. [2020-10-11 16:55:06,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:55:06,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1363 transitions. [2020-10-11 16:55:06,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-11 16:55:06,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-11 16:55:06,229 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-11 16:55:06,230 INFO L185 Difference]: Start difference. First operand has 507 places, 551 transitions, 18576 flow. Second operand 30 states and 1363 transitions. [2020-10-11 16:55:06,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 595 transitions, 22683 flow [2020-10-11 16:55:07,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 595 transitions, 22329 flow, removed 121 selfloop flow, removed 18 redundant places. [2020-10-11 16:55:07,362 INFO L241 Difference]: Finished difference. Result has 523 places, 560 transitions, 19345 flow [2020-10-11 16:55:07,363 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=18334, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=19345, PETRI_PLACES=523, PETRI_TRANSITIONS=560} [2020-10-11 16:55:07,363 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 468 predicate places. [2020-10-11 16:55:07,363 INFO L481 AbstractCegarLoop]: Abstraction has has 523 places, 560 transitions, 19345 flow [2020-10-11 16:55:07,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:55:07,363 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:55:07,363 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:55:07,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-11 16:55:07,564 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:55:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:55:07,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1953685026, now seen corresponding path program 46 times [2020-10-11 16:55:07,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:55:07,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304834263] [2020-10-11 16:55:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:55:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:07,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304834263] [2020-10-11 16:55:07,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309961576] [2020-10-11 16:55:07,910 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:07,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:55:07,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:55:07,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 16:55:08,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:55:08,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:55:08,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:55:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:08,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:55:08,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 16:55:08,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113683208] [2020-10-11 16:55:08,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 16:55:08,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:55:08,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 16:55:08,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-11 16:55:08,292 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:55:08,293 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 560 transitions, 19345 flow. Second operand 21 states. [2020-10-11 16:55:08,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:55:08,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:55:08,293 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:55:10,089 INFO L129 PetriNetUnfolder]: 479/3620 cut-off events. [2020-10-11 16:55:10,090 INFO L130 PetriNetUnfolder]: For 412252/412648 co-relation queries the response was YES. [2020-10-11 16:55:10,158 INFO L80 FinitePrefix]: Finished finitePrefix Result has 29081 conditions, 3620 events. 479/3620 cut-off events. For 412252/412648 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 34918 event pairs, 0 based on Foata normal form. 97/3327 useless extension candidates. Maximal degree in co-relation 28847. Up to 621 conditions per place. [2020-10-11 16:55:10,182 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 333 selfloop transitions, 225 changer transitions 8/600 dead transitions. [2020-10-11 16:55:10,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 600 transitions, 23335 flow [2020-10-11 16:55:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 16:55:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-11 16:55:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1409 transitions. [2020-10-11 16:55:10,184 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8263929618768329 [2020-10-11 16:55:10,184 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1409 transitions. [2020-10-11 16:55:10,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1409 transitions. [2020-10-11 16:55:10,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:55:10,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1409 transitions. [2020-10-11 16:55:10,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-11 16:55:10,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-11 16:55:10,187 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-11 16:55:10,188 INFO L185 Difference]: Start difference. First operand has 523 places, 560 transitions, 19345 flow. Second operand 31 states and 1409 transitions. [2020-10-11 16:55:10,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 600 transitions, 23335 flow [2020-10-11 16:55:11,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 600 transitions, 22952 flow, removed 125 selfloop flow, removed 17 redundant places. [2020-10-11 16:55:11,456 INFO L241 Difference]: Finished difference. Result has 540 places, 564 transitions, 19954 flow [2020-10-11 16:55:11,457 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=19074, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=19954, PETRI_PLACES=540, PETRI_TRANSITIONS=564} [2020-10-11 16:55:11,457 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 485 predicate places. [2020-10-11 16:55:11,457 INFO L481 AbstractCegarLoop]: Abstraction has has 540 places, 564 transitions, 19954 flow [2020-10-11 16:55:11,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 16:55:11,457 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:55:11,457 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:55:11,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:11,664 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:55:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:55:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1543095786, now seen corresponding path program 47 times [2020-10-11 16:55:11,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:55:11,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741728206] [2020-10-11 16:55:11,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:55:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:11,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741728206] [2020-10-11 16:55:11,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056972181] [2020-10-11 16:55:11,908 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:11,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 16:55:11,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:55:11,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 16:55:11,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:55:11,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:55:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:12,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:55:12,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 16:55:12,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422930145] [2020-10-11 16:55:12,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:55:12,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:55:12,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:55:12,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:55:12,623 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:55:12,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 564 transitions, 19954 flow. Second operand 20 states. [2020-10-11 16:55:12,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:55:12,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:55:12,625 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:55:14,434 INFO L129 PetriNetUnfolder]: 485/3674 cut-off events. [2020-10-11 16:55:14,434 INFO L130 PetriNetUnfolder]: For 420212/420608 co-relation queries the response was YES. [2020-10-11 16:55:14,510 INFO L80 FinitePrefix]: Finished finitePrefix Result has 29725 conditions, 3674 events. 485/3674 cut-off events. For 420212/420608 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 35532 event pairs, 0 based on Foata normal form. 104/3382 useless extension candidates. Maximal degree in co-relation 29487. Up to 629 conditions per place. [2020-10-11 16:55:14,534 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 296 selfloop transitions, 269 changer transitions 8/607 dead transitions. [2020-10-11 16:55:14,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 607 transitions, 24122 flow [2020-10-11 16:55:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 16:55:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-11 16:55:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1455 transitions. [2020-10-11 16:55:14,536 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8267045454545454 [2020-10-11 16:55:14,536 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1455 transitions. [2020-10-11 16:55:14,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1455 transitions. [2020-10-11 16:55:14,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:55:14,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1455 transitions. [2020-10-11 16:55:14,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-11 16:55:14,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-11 16:55:14,540 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-11 16:55:14,540 INFO L185 Difference]: Start difference. First operand has 540 places, 564 transitions, 19954 flow. Second operand 32 states and 1455 transitions. [2020-10-11 16:55:14,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 607 transitions, 24122 flow [2020-10-11 16:55:16,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 607 transitions, 23653 flow, removed 121 selfloop flow, removed 22 redundant places. [2020-10-11 16:55:16,193 INFO L241 Difference]: Finished difference. Result has 554 places, 571 transitions, 20687 flow [2020-10-11 16:55:16,193 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=19601, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=20687, PETRI_PLACES=554, PETRI_TRANSITIONS=571} [2020-10-11 16:55:16,193 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 499 predicate places. [2020-10-11 16:55:16,193 INFO L481 AbstractCegarLoop]: Abstraction has has 554 places, 571 transitions, 20687 flow [2020-10-11 16:55:16,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:55:16,194 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:55:16,194 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:55:16,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:16,395 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:55:16,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:55:16,395 INFO L82 PathProgramCache]: Analyzing trace with hash 642559282, now seen corresponding path program 48 times [2020-10-11 16:55:16,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:55:16,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275707806] [2020-10-11 16:55:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:55:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:16,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275707806] [2020-10-11 16:55:16,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100346442] [2020-10-11 16:55:16,650 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:16,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 16:55:16,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:55:16,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 16:55:16,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:55:16,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:55:16,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:55:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:16,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:55:16,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 16:55:16,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792758114] [2020-10-11 16:55:16,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 16:55:16,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:55:16,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 16:55:16,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-10-11 16:55:17,663 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:55:17,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 571 transitions, 20687 flow. Second operand 21 states. [2020-10-11 16:55:17,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:55:17,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:55:17,664 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:55:19,717 INFO L129 PetriNetUnfolder]: 489/3717 cut-off events. [2020-10-11 16:55:19,718 INFO L130 PetriNetUnfolder]: For 427230/427588 co-relation queries the response was YES. [2020-10-11 16:55:19,782 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30288 conditions, 3717 events. 489/3717 cut-off events. For 427230/427588 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 35978 event pairs, 0 based on Foata normal form. 119/3435 useless extension candidates. Maximal degree in co-relation 30045. Up to 637 conditions per place. [2020-10-11 16:55:19,805 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 254 selfloop transitions, 317 changer transitions 8/613 dead transitions. [2020-10-11 16:55:19,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 613 transitions, 24891 flow [2020-10-11 16:55:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 16:55:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-11 16:55:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1501 transitions. [2020-10-11 16:55:19,808 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8269972451790634 [2020-10-11 16:55:19,808 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1501 transitions. [2020-10-11 16:55:19,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1501 transitions. [2020-10-11 16:55:19,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:55:19,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1501 transitions. [2020-10-11 16:55:19,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-11 16:55:19,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-11 16:55:19,812 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-11 16:55:19,812 INFO L185 Difference]: Start difference. First operand has 554 places, 571 transitions, 20687 flow. Second operand 33 states and 1501 transitions. [2020-10-11 16:55:19,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 613 transitions, 24891 flow [2020-10-11 16:55:21,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 613 transitions, 24309 flow, removed 126 selfloop flow, removed 24 redundant places. [2020-10-11 16:55:21,411 INFO L241 Difference]: Finished difference. Result has 567 places, 577 transitions, 21367 flow [2020-10-11 16:55:21,411 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=20225, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=21367, PETRI_PLACES=567, PETRI_TRANSITIONS=577} [2020-10-11 16:55:21,412 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 512 predicate places. [2020-10-11 16:55:21,412 INFO L481 AbstractCegarLoop]: Abstraction has has 567 places, 577 transitions, 21367 flow [2020-10-11 16:55:21,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 16:55:21,412 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:55:21,412 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:55:21,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-11 16:55:21,613 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:55:21,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:55:21,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1957636810, now seen corresponding path program 49 times [2020-10-11 16:55:21,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:55:21,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049038817] [2020-10-11 16:55:21,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:55:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:21,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049038817] [2020-10-11 16:55:21,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614015722] [2020-10-11 16:55:21,844 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:21,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 16:55:21,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:55:21,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:55:21,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:55:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:21,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:55:21,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 16:55:21,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595971104] [2020-10-11 16:55:21,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 16:55:21,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:55:21,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 16:55:21,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-11 16:55:22,213 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:55:22,214 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 577 transitions, 21367 flow. Second operand 21 states. [2020-10-11 16:55:22,214 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:55:22,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:55:22,215 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:55:24,336 INFO L129 PetriNetUnfolder]: 497/3782 cut-off events. [2020-10-11 16:55:24,336 INFO L130 PetriNetUnfolder]: For 439339/439742 co-relation queries the response was YES. [2020-10-11 16:55:24,416 INFO L80 FinitePrefix]: Finished finitePrefix Result has 31163 conditions, 3782 events. 497/3782 cut-off events. For 439339/439742 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 36787 event pairs, 0 based on Foata normal form. 169/3543 useless extension candidates. Maximal degree in co-relation 30916. Up to 653 conditions per place. [2020-10-11 16:55:24,440 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 148 selfloop transitions, 437 changer transitions 8/627 dead transitions. [2020-10-11 16:55:24,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 627 transitions, 26165 flow [2020-10-11 16:55:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 16:55:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-11 16:55:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1685 transitions. [2020-10-11 16:55:24,442 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.828009828009828 [2020-10-11 16:55:24,442 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1685 transitions. [2020-10-11 16:55:24,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1685 transitions. [2020-10-11 16:55:24,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:55:24,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1685 transitions. [2020-10-11 16:55:24,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-11 16:55:24,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-11 16:55:24,445 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-11 16:55:24,445 INFO L185 Difference]: Start difference. First operand has 567 places, 577 transitions, 21367 flow. Second operand 37 states and 1685 transitions. [2020-10-11 16:55:24,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 627 transitions, 26165 flow [2020-10-11 16:55:26,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 627 transitions, 25614 flow, removed 133 selfloop flow, removed 23 redundant places. [2020-10-11 16:55:26,134 INFO L241 Difference]: Finished difference. Result has 585 places, 587 transitions, 22617 flow [2020-10-11 16:55:26,134 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=20952, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=22617, PETRI_PLACES=585, PETRI_TRANSITIONS=587} [2020-10-11 16:55:26,134 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 530 predicate places. [2020-10-11 16:55:26,134 INFO L481 AbstractCegarLoop]: Abstraction has has 585 places, 587 transitions, 22617 flow [2020-10-11 16:55:26,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 16:55:26,135 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:55:26,135 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:55:26,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:26,335 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:55:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:55:26,336 INFO L82 PathProgramCache]: Analyzing trace with hash 492542152, now seen corresponding path program 50 times [2020-10-11 16:55:26,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:55:26,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014803574] [2020-10-11 16:55:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:55:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:26,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014803574] [2020-10-11 16:55:26,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555233526] [2020-10-11 16:55:26,582 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:26,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:55:26,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:55:26,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 16:55:26,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:55:26,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:55:26,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:55:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:26,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:55:26,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 16:55:26,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543923759] [2020-10-11 16:55:26,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 16:55:26,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:55:26,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 16:55:26,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-11 16:55:27,691 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:55:27,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 587 transitions, 22617 flow. Second operand 21 states. [2020-10-11 16:55:27,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:55:27,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:55:27,693 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:55:30,044 INFO L129 PetriNetUnfolder]: 509/3872 cut-off events. [2020-10-11 16:55:30,044 INFO L130 PetriNetUnfolder]: For 451879/452274 co-relation queries the response was YES. [2020-10-11 16:55:30,146 INFO L80 FinitePrefix]: Finished finitePrefix Result has 32313 conditions, 3872 events. 509/3872 cut-off events. For 451879/452274 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 37834 event pairs, 0 based on Foata normal form. 181/3638 useless extension candidates. Maximal degree in co-relation 32061. Up to 669 conditions per place. [2020-10-11 16:55:30,173 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 119 selfloop transitions, 480 changer transitions 8/641 dead transitions. [2020-10-11 16:55:30,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 641 transitions, 27911 flow [2020-10-11 16:55:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 16:55:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 16:55:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 1824 transitions. [2020-10-11 16:55:30,176 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8290909090909091 [2020-10-11 16:55:30,176 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 1824 transitions. [2020-10-11 16:55:30,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 1824 transitions. [2020-10-11 16:55:30,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:55:30,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 1824 transitions. [2020-10-11 16:55:30,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-11 16:55:30,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-11 16:55:30,181 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-11 16:55:30,181 INFO L185 Difference]: Start difference. First operand has 585 places, 587 transitions, 22617 flow. Second operand 40 states and 1824 transitions. [2020-10-11 16:55:30,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 641 transitions, 27911 flow [2020-10-11 16:55:32,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 641 transitions, 27043 flow, removed 160 selfloop flow, removed 30 redundant places. [2020-10-11 16:55:32,090 INFO L241 Difference]: Finished difference. Result has 602 places, 599 transitions, 23836 flow [2020-10-11 16:55:32,091 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=21909, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=23836, PETRI_PLACES=602, PETRI_TRANSITIONS=599} [2020-10-11 16:55:32,091 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 547 predicate places. [2020-10-11 16:55:32,091 INFO L481 AbstractCegarLoop]: Abstraction has has 602 places, 599 transitions, 23836 flow [2020-10-11 16:55:32,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 16:55:32,091 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:55:32,091 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:55:32,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-11 16:55:32,292 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:55:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:55:32,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1554985350, now seen corresponding path program 51 times [2020-10-11 16:55:32,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:55:32,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205723060] [2020-10-11 16:55:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:55:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:32,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205723060] [2020-10-11 16:55:32,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037323966] [2020-10-11 16:55:32,606 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:32,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 16:55:32,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:55:32,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:55:32,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:55:32,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:55:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:32,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:55:32,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 16:55:32,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826126368] [2020-10-11 16:55:32,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 16:55:32,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:55:32,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 16:55:32,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-10-11 16:55:33,544 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:55:33,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 599 transitions, 23836 flow. Second operand 22 states. [2020-10-11 16:55:33,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:55:33,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:55:33,546 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:55:35,372 INFO L129 PetriNetUnfolder]: 511/3890 cut-off events. [2020-10-11 16:55:35,372 INFO L130 PetriNetUnfolder]: For 475600/475959 co-relation queries the response was YES. [2020-10-11 16:55:35,462 INFO L80 FinitePrefix]: Finished finitePrefix Result has 33173 conditions, 3890 events. 511/3890 cut-off events. For 475600/475959 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 37967 event pairs, 0 based on Foata normal form. 76/3547 useless extension candidates. Maximal degree in co-relation 32913. Up to 834 conditions per place. [2020-10-11 16:55:35,488 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 519 selfloop transitions, 75 changer transitions 8/636 dead transitions. [2020-10-11 16:55:35,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 636 transitions, 27734 flow [2020-10-11 16:55:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 16:55:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-11 16:55:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1136 transitions. [2020-10-11 16:55:35,490 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8261818181818181 [2020-10-11 16:55:35,490 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1136 transitions. [2020-10-11 16:55:35,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1136 transitions. [2020-10-11 16:55:35,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:55:35,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1136 transitions. [2020-10-11 16:55:35,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-11 16:55:35,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-11 16:55:35,491 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-11 16:55:35,492 INFO L185 Difference]: Start difference. First operand has 602 places, 599 transitions, 23836 flow. Second operand 25 states and 1136 transitions. [2020-10-11 16:55:35,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 636 transitions, 27734 flow [2020-10-11 16:55:37,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 636 transitions, 26723 flow, removed 163 selfloop flow, removed 32 redundant places. [2020-10-11 16:55:37,362 INFO L241 Difference]: Finished difference. Result has 596 places, 601 transitions, 23244 flow [2020-10-11 16:55:37,362 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=22875, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=23244, PETRI_PLACES=596, PETRI_TRANSITIONS=601} [2020-10-11 16:55:37,363 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 541 predicate places. [2020-10-11 16:55:37,363 INFO L481 AbstractCegarLoop]: Abstraction has has 596 places, 601 transitions, 23244 flow [2020-10-11 16:55:37,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 16:55:37,363 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:55:37,363 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:55:37,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-11 16:55:37,564 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:55:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:55:37,564 INFO L82 PathProgramCache]: Analyzing trace with hash 451867476, now seen corresponding path program 52 times [2020-10-11 16:55:37,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:55:37,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619965541] [2020-10-11 16:55:37,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:55:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:37,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619965541] [2020-10-11 16:55:37,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105491623] [2020-10-11 16:55:37,890 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:37,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:55:37,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:55:37,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 16:55:37,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:55:37,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:55:38,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:55:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:38,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:55:38,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-10-11 16:55:38,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710711442] [2020-10-11 16:55:38,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:55:38,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:55:38,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:55:38,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-10-11 16:55:38,248 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:55:38,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 601 transitions, 23244 flow. Second operand 23 states. [2020-10-11 16:55:38,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:55:38,249 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:55:38,249 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:55:40,193 INFO L129 PetriNetUnfolder]: 515/3933 cut-off events. [2020-10-11 16:55:40,193 INFO L130 PetriNetUnfolder]: For 492504/492870 co-relation queries the response was YES. [2020-10-11 16:55:40,490 INFO L80 FinitePrefix]: Finished finitePrefix Result has 33549 conditions, 3933 events. 515/3933 cut-off events. For 492504/492870 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 38290 event pairs, 0 based on Foata normal form. 81/3589 useless extension candidates. Maximal degree in co-relation 33288. Up to 730 conditions per place. [2020-10-11 16:55:40,517 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 466 selfloop transitions, 133 changer transitions 8/641 dead transitions. [2020-10-11 16:55:40,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 641 transitions, 27441 flow [2020-10-11 16:55:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 16:55:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-11 16:55:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1316 transitions. [2020-10-11 16:55:40,518 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8250783699059561 [2020-10-11 16:55:40,518 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1316 transitions. [2020-10-11 16:55:40,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1316 transitions. [2020-10-11 16:55:40,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:55:40,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1316 transitions. [2020-10-11 16:55:40,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-11 16:55:40,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-11 16:55:40,521 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-11 16:55:40,521 INFO L185 Difference]: Start difference. First operand has 596 places, 601 transitions, 23244 flow. Second operand 29 states and 1316 transitions. [2020-10-11 16:55:40,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 641 transitions, 27441 flow [2020-10-11 16:55:42,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 641 transitions, 27066 flow, removed 121 selfloop flow, removed 21 redundant places. [2020-10-11 16:55:42,171 INFO L241 Difference]: Finished difference. Result has 607 places, 605 transitions, 23632 flow [2020-10-11 16:55:42,172 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=22981, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=23632, PETRI_PLACES=607, PETRI_TRANSITIONS=605} [2020-10-11 16:55:42,172 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 552 predicate places. [2020-10-11 16:55:42,172 INFO L481 AbstractCegarLoop]: Abstraction has has 607 places, 605 transitions, 23632 flow [2020-10-11 16:55:42,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:55:42,172 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:55:42,173 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:55:42,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-11 16:55:42,373 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:55:42,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:55:42,374 INFO L82 PathProgramCache]: Analyzing trace with hash 717103596, now seen corresponding path program 53 times [2020-10-11 16:55:42,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:55:42,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24956479] [2020-10-11 16:55:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:55:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:42,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24956479] [2020-10-11 16:55:42,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257911823] [2020-10-11 16:55:42,685 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:42,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 16:55:42,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:55:42,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:55:42,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:55:42,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:55:42,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:55:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:42,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:55:42,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-10-11 16:55:42,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986000398] [2020-10-11 16:55:42,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:55:42,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:55:42,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:55:42,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-11 16:55:43,829 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:55:43,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 605 transitions, 23632 flow. Second operand 23 states. [2020-10-11 16:55:43,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:55:43,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:55:43,830 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:55:45,939 INFO L129 PetriNetUnfolder]: 519/3969 cut-off events. [2020-10-11 16:55:45,940 INFO L130 PetriNetUnfolder]: For 498770/499136 co-relation queries the response was YES. [2020-10-11 16:55:46,023 INFO L80 FinitePrefix]: Finished finitePrefix Result has 33979 conditions, 3969 events. 519/3969 cut-off events. For 498770/499136 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 38829 event pairs, 0 based on Foata normal form. 102/3642 useless extension candidates. Maximal degree in co-relation 33714. Up to 689 conditions per place. [2020-10-11 16:55:46,050 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 362 selfloop transitions, 241 changer transitions 8/645 dead transitions. [2020-10-11 16:55:46,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 645 transitions, 28014 flow [2020-10-11 16:55:46,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 16:55:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-11 16:55:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1408 transitions. [2020-10-11 16:55:46,051 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8258064516129032 [2020-10-11 16:55:46,051 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1408 transitions. [2020-10-11 16:55:46,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1408 transitions. [2020-10-11 16:55:46,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:55:46,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1408 transitions. [2020-10-11 16:55:46,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-11 16:55:46,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-11 16:55:46,053 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-11 16:55:46,054 INFO L185 Difference]: Start difference. First operand has 607 places, 605 transitions, 23632 flow. Second operand 31 states and 1408 transitions. [2020-10-11 16:55:46,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 645 transitions, 28014 flow [2020-10-11 16:55:47,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 645 transitions, 27536 flow, removed 123 selfloop flow, removed 25 redundant places. [2020-10-11 16:55:47,920 INFO L241 Difference]: Finished difference. Result has 614 places, 609 transitions, 24123 flow [2020-10-11 16:55:47,921 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=23274, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=24123, PETRI_PLACES=614, PETRI_TRANSITIONS=609} [2020-10-11 16:55:47,921 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 559 predicate places. [2020-10-11 16:55:47,921 INFO L481 AbstractCegarLoop]: Abstraction has has 614 places, 609 transitions, 24123 flow [2020-10-11 16:55:47,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:55:47,921 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:55:47,921 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:55:48,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-11 16:55:48,122 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:55:48,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:55:48,122 INFO L82 PathProgramCache]: Analyzing trace with hash -510992276, now seen corresponding path program 54 times [2020-10-11 16:55:48,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:55:48,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405997318] [2020-10-11 16:55:48,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:55:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:48,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405997318] [2020-10-11 16:55:48,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738184977] [2020-10-11 16:55:48,438 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:48,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 16:55:48,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:55:48,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:55:48,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:55:48,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:55:48,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:55:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 4 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:48,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:55:48,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-10-11 16:55:48,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634870123] [2020-10-11 16:55:48,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:55:48,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:55:48,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:55:48,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-11 16:55:49,244 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:55:49,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 609 transitions, 24123 flow. Second operand 23 states. [2020-10-11 16:55:49,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:55:49,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:55:49,245 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:55:51,402 INFO L129 PetriNetUnfolder]: 521/3987 cut-off events. [2020-10-11 16:55:51,402 INFO L130 PetriNetUnfolder]: For 501809/502175 co-relation queries the response was YES. [2020-10-11 16:55:51,499 INFO L80 FinitePrefix]: Finished finitePrefix Result has 34283 conditions, 3987 events. 521/3987 cut-off events. For 501809/502175 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 38938 event pairs, 0 based on Foata normal form. 120/3676 useless extension candidates. Maximal degree in co-relation 34016. Up to 693 conditions per place. [2020-10-11 16:55:51,527 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 279 selfloop transitions, 326 changer transitions 8/647 dead transitions. [2020-10-11 16:55:51,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 647 transitions, 28569 flow [2020-10-11 16:55:51,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 16:55:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-11 16:55:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1500 transitions. [2020-10-11 16:55:51,528 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8264462809917356 [2020-10-11 16:55:51,528 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1500 transitions. [2020-10-11 16:55:51,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1500 transitions. [2020-10-11 16:55:51,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:55:51,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1500 transitions. [2020-10-11 16:55:51,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-11 16:55:51,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-11 16:55:51,530 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-11 16:55:51,530 INFO L185 Difference]: Start difference. First operand has 614 places, 609 transitions, 24123 flow. Second operand 33 states and 1500 transitions. [2020-10-11 16:55:51,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 647 transitions, 28569 flow [2020-10-11 16:55:53,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 647 transitions, 27857 flow, removed 131 selfloop flow, removed 28 redundant places. [2020-10-11 16:55:53,637 INFO L241 Difference]: Finished difference. Result has 620 places, 611 transitions, 24447 flow [2020-10-11 16:55:53,638 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=23539, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=24447, PETRI_PLACES=620, PETRI_TRANSITIONS=611} [2020-10-11 16:55:53,638 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 565 predicate places. [2020-10-11 16:55:53,638 INFO L481 AbstractCegarLoop]: Abstraction has has 620 places, 611 transitions, 24447 flow [2020-10-11 16:55:53,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:55:53,638 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:55:53,639 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:55:53,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:53,839 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:55:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:55:53,840 INFO L82 PathProgramCache]: Analyzing trace with hash 89498184, now seen corresponding path program 55 times [2020-10-11 16:55:53,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:55:53,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918736904] [2020-10-11 16:55:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:55:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:54,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918736904] [2020-10-11 16:55:54,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041602298] [2020-10-11 16:55:54,226 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:54,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:55:54,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:55:54,339 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:55:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:54,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:55:54,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 16:55:54,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517177766] [2020-10-11 16:55:54,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 16:55:54,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:55:54,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 16:55:54,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-10-11 16:55:54,635 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:55:54,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 611 transitions, 24447 flow. Second operand 22 states. [2020-10-11 16:55:54,636 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:55:54,636 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:55:54,636 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:55:56,929 INFO L129 PetriNetUnfolder]: 525/4030 cut-off events. [2020-10-11 16:55:56,930 INFO L130 PetriNetUnfolder]: For 507329/507689 co-relation queries the response was YES. [2020-10-11 16:55:57,005 INFO L80 FinitePrefix]: Finished finitePrefix Result has 34748 conditions, 4030 events. 525/4030 cut-off events. For 507329/507689 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 39521 event pairs, 0 based on Foata normal form. 127/3722 useless extension candidates. Maximal degree in co-relation 34479. Up to 701 conditions per place. [2020-10-11 16:55:57,032 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 247 selfloop transitions, 364 changer transitions 8/653 dead transitions. [2020-10-11 16:55:57,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 653 transitions, 29125 flow [2020-10-11 16:55:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 16:55:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-11 16:55:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1455 transitions. [2020-10-11 16:55:57,034 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8267045454545454 [2020-10-11 16:55:57,034 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1455 transitions. [2020-10-11 16:55:57,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1455 transitions. [2020-10-11 16:55:57,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:55:57,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1455 transitions. [2020-10-11 16:55:57,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-11 16:55:57,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-11 16:55:57,036 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-11 16:55:57,036 INFO L185 Difference]: Start difference. First operand has 620 places, 611 transitions, 24447 flow. Second operand 32 states and 1455 transitions. [2020-10-11 16:55:57,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 653 transitions, 29125 flow [2020-10-11 16:55:59,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 653 transitions, 28303 flow, removed 133 selfloop flow, removed 29 redundant places. [2020-10-11 16:55:59,150 INFO L241 Difference]: Finished difference. Result has 626 places, 615 transitions, 24949 flow [2020-10-11 16:55:59,151 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=23757, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=24949, PETRI_PLACES=626, PETRI_TRANSITIONS=615} [2020-10-11 16:55:59,151 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 571 predicate places. [2020-10-11 16:55:59,151 INFO L481 AbstractCegarLoop]: Abstraction has has 626 places, 615 transitions, 24949 flow [2020-10-11 16:55:59,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 16:55:59,151 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:55:59,152 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:55:59,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:59,353 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:55:59,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:55:59,353 INFO L82 PathProgramCache]: Analyzing trace with hash 443412254, now seen corresponding path program 56 times [2020-10-11 16:55:59,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:55:59,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812166236] [2020-10-11 16:55:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:55:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:55:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:59,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812166236] [2020-10-11 16:55:59,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839821035] [2020-10-11 16:55:59,640 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:55:59,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:55:59,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:55:59,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:55:59,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:55:59,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:55:59,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:55:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:55:59,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:55:59,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-10-11 16:55:59,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24153887] [2020-10-11 16:55:59,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:55:59,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:55:59,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:55:59,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-11 16:55:59,892 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:55:59,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 615 transitions, 24949 flow. Second operand 23 states. [2020-10-11 16:55:59,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:55:59,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:55:59,893 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:56:02,238 INFO L129 PetriNetUnfolder]: 527/4041 cut-off events. [2020-10-11 16:56:02,238 INFO L130 PetriNetUnfolder]: For 511038/511438 co-relation queries the response was YES. [2020-10-11 16:56:02,344 INFO L80 FinitePrefix]: Finished finitePrefix Result has 35055 conditions, 4041 events. 527/4041 cut-off events. For 511038/511438 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 39685 event pairs, 0 based on Foata normal form. 144/3749 useless extension candidates. Maximal degree in co-relation 34782. Up to 705 conditions per place. [2020-10-11 16:56:02,372 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 204 selfloop transitions, 410 changer transitions 8/656 dead transitions. [2020-10-11 16:56:02,372 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 656 transitions, 29618 flow [2020-10-11 16:56:02,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 16:56:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-11 16:56:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1592 transitions. [2020-10-11 16:56:02,374 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.827012987012987 [2020-10-11 16:56:02,374 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1592 transitions. [2020-10-11 16:56:02,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1592 transitions. [2020-10-11 16:56:02,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:56:02,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1592 transitions. [2020-10-11 16:56:02,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-11 16:56:02,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-11 16:56:02,376 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-11 16:56:02,376 INFO L185 Difference]: Start difference. First operand has 626 places, 615 transitions, 24949 flow. Second operand 35 states and 1592 transitions. [2020-10-11 16:56:02,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 656 transitions, 29618 flow [2020-10-11 16:56:04,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 656 transitions, 28756 flow, removed 133 selfloop flow, removed 27 redundant places. [2020-10-11 16:56:04,746 INFO L241 Difference]: Finished difference. Result has 635 places, 617 transitions, 25317 flow [2020-10-11 16:56:04,747 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=24223, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=25317, PETRI_PLACES=635, PETRI_TRANSITIONS=617} [2020-10-11 16:56:04,747 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 580 predicate places. [2020-10-11 16:56:04,747 INFO L481 AbstractCegarLoop]: Abstraction has has 635 places, 617 transitions, 25317 flow [2020-10-11 16:56:04,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:56:04,747 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:56:04,747 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:56:04,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:56:04,960 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:56:04,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:56:04,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1652600610, now seen corresponding path program 57 times [2020-10-11 16:56:04,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:56:04,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351944132] [2020-10-11 16:56:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:56:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:56:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:05,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351944132] [2020-10-11 16:56:05,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438425216] [2020-10-11 16:56:05,241 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:56:05,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 16:56:05,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:56:05,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:56:05,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:56:05,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:56:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:05,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:56:05,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 16:56:05,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558567304] [2020-10-11 16:56:05,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 16:56:05,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:56:05,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 16:56:05,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-11 16:56:05,565 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:56:05,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 617 transitions, 25317 flow. Second operand 22 states. [2020-10-11 16:56:05,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:56:05,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:56:05,566 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:56:07,704 INFO L129 PetriNetUnfolder]: 531/4077 cut-off events. [2020-10-11 16:56:07,705 INFO L130 PetriNetUnfolder]: For 517457/517857 co-relation queries the response was YES. [2020-10-11 16:56:07,812 INFO L80 FinitePrefix]: Finished finitePrefix Result has 35522 conditions, 4077 events. 531/4077 cut-off events. For 517457/517857 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 40055 event pairs, 0 based on Foata normal form. 159/3796 useless extension candidates. Maximal degree in co-relation 35247. Up to 713 conditions per place. [2020-10-11 16:56:07,841 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 174 selfloop transitions, 443 changer transitions 8/659 dead transitions. [2020-10-11 16:56:07,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 659 transitions, 30168 flow [2020-10-11 16:56:07,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 16:56:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 16:56:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1547 transitions. [2020-10-11 16:56:07,843 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8272727272727273 [2020-10-11 16:56:07,843 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1547 transitions. [2020-10-11 16:56:07,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1547 transitions. [2020-10-11 16:56:07,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:56:07,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1547 transitions. [2020-10-11 16:56:07,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-11 16:56:07,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-11 16:56:07,845 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-11 16:56:07,846 INFO L185 Difference]: Start difference. First operand has 635 places, 617 transitions, 25317 flow. Second operand 34 states and 1547 transitions. [2020-10-11 16:56:07,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 659 transitions, 30168 flow [2020-10-11 16:56:10,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 633 places, 659 transitions, 29142 flow, removed 135 selfloop flow, removed 32 redundant places. [2020-10-11 16:56:10,209 INFO L241 Difference]: Finished difference. Result has 638 places, 621 transitions, 25701 flow [2020-10-11 16:56:10,210 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=24431, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=25701, PETRI_PLACES=638, PETRI_TRANSITIONS=621} [2020-10-11 16:56:10,210 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 583 predicate places. [2020-10-11 16:56:10,211 INFO L481 AbstractCegarLoop]: Abstraction has has 638 places, 621 transitions, 25701 flow [2020-10-11 16:56:10,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 16:56:10,211 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:56:10,211 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:56:10,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-10-11 16:56:10,425 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:56:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:56:10,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1169110282, now seen corresponding path program 58 times [2020-10-11 16:56:10,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:56:10,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311018216] [2020-10-11 16:56:10,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:56:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:56:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:10,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311018216] [2020-10-11 16:56:10,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675406110] [2020-10-11 16:56:10,675 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:56:10,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:56:10,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:56:10,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 16:56:10,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:56:10,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:56:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:10,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:56:10,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 16:56:10,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973948735] [2020-10-11 16:56:10,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 16:56:10,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:56:10,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 16:56:10,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-11 16:56:11,395 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:56:11,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 621 transitions, 25701 flow. Second operand 22 states. [2020-10-11 16:56:11,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:56:11,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:56:11,397 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:56:14,035 INFO L129 PetriNetUnfolder]: 541/4153 cut-off events. [2020-10-11 16:56:14,035 INFO L130 PetriNetUnfolder]: For 531008/531388 co-relation queries the response was YES. [2020-10-11 16:56:14,116 INFO L80 FinitePrefix]: Finished finitePrefix Result has 36375 conditions, 4153 events. 541/4153 cut-off events. For 531008/531388 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 41007 event pairs, 0 based on Foata normal form. 182/3888 useless extension candidates. Maximal degree in co-relation 36098. Up to 731 conditions per place. [2020-10-11 16:56:14,145 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 112 selfloop transitions, 519 changer transitions 8/673 dead transitions. [2020-10-11 16:56:14,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 672 places, 673 transitions, 31319 flow [2020-10-11 16:56:14,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 16:56:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-11 16:56:14,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1731 transitions. [2020-10-11 16:56:14,147 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8282296650717703 [2020-10-11 16:56:14,147 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1731 transitions. [2020-10-11 16:56:14,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1731 transitions. [2020-10-11 16:56:14,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:56:14,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1731 transitions. [2020-10-11 16:56:14,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 39 states. [2020-10-11 16:56:14,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 39 states. [2020-10-11 16:56:14,149 INFO L81 ComplementDD]: Finished complementDD. Result 39 states. [2020-10-11 16:56:14,149 INFO L185 Difference]: Start difference. First operand has 638 places, 621 transitions, 25701 flow. Second operand 38 states and 1731 transitions. [2020-10-11 16:56:14,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 672 places, 673 transitions, 31319 flow [2020-10-11 16:56:16,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 673 transitions, 30145 flow, removed 145 selfloop flow, removed 32 redundant places. [2020-10-11 16:56:16,515 INFO L241 Difference]: Finished difference. Result has 647 places, 633 transitions, 26564 flow [2020-10-11 16:56:16,516 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=24687, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=26564, PETRI_PLACES=647, PETRI_TRANSITIONS=633} [2020-10-11 16:56:16,516 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 592 predicate places. [2020-10-11 16:56:16,516 INFO L481 AbstractCegarLoop]: Abstraction has has 647 places, 633 transitions, 26564 flow [2020-10-11 16:56:16,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 16:56:16,517 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:56:16,517 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:56:16,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:56:16,717 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:56:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:56:16,718 INFO L82 PathProgramCache]: Analyzing trace with hash -35653396, now seen corresponding path program 59 times [2020-10-11 16:56:16,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:56:16,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067518380] [2020-10-11 16:56:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:56:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:56:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:16,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067518380] [2020-10-11 16:56:16,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019566136] [2020-10-11 16:56:16,982 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:56:17,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 16:56:17,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:56:17,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:56:17,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:56:17,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:56:17,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:56:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:17,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:56:17,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-10-11 16:56:17,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525312403] [2020-10-11 16:56:17,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:56:17,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:56:17,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:56:17,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-11 16:56:17,321 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:56:17,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 633 transitions, 26564 flow. Second operand 23 states. [2020-10-11 16:56:17,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:56:17,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:56:17,323 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:56:20,111 INFO L129 PetriNetUnfolder]: 547/4193 cut-off events. [2020-10-11 16:56:20,111 INFO L130 PetriNetUnfolder]: For 547969/548373 co-relation queries the response was YES. [2020-10-11 16:56:20,225 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37163 conditions, 4193 events. 547/4193 cut-off events. For 547969/548373 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 41387 event pairs, 0 based on Foata normal form. 193/3935 useless extension candidates. Maximal degree in co-relation 36882. Up to 743 conditions per place. [2020-10-11 16:56:20,254 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 106 selfloop transitions, 533 changer transitions 8/681 dead transitions. [2020-10-11 16:56:20,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 681 transitions, 32179 flow [2020-10-11 16:56:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 16:56:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-11 16:56:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 1868 transitions. [2020-10-11 16:56:20,256 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8283813747228381 [2020-10-11 16:56:20,256 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 1868 transitions. [2020-10-11 16:56:20,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 1868 transitions. [2020-10-11 16:56:20,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:56:20,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 1868 transitions. [2020-10-11 16:56:20,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 42 states. [2020-10-11 16:56:20,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 42 states. [2020-10-11 16:56:20,259 INFO L81 ComplementDD]: Finished complementDD. Result 42 states. [2020-10-11 16:56:20,259 INFO L185 Difference]: Start difference. First operand has 647 places, 633 transitions, 26564 flow. Second operand 41 states and 1868 transitions. [2020-10-11 16:56:20,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 681 transitions, 32179 flow [2020-10-11 16:56:23,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 681 transitions, 30878 flow, removed 218 selfloop flow, removed 32 redundant places. [2020-10-11 16:56:23,633 INFO L241 Difference]: Finished difference. Result has 658 places, 640 transitions, 27073 flow [2020-10-11 16:56:23,634 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=25393, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=526, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=27073, PETRI_PLACES=658, PETRI_TRANSITIONS=640} [2020-10-11 16:56:23,634 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 603 predicate places. [2020-10-11 16:56:23,634 INFO L481 AbstractCegarLoop]: Abstraction has has 658 places, 640 transitions, 27073 flow [2020-10-11 16:56:23,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:56:23,634 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:56:23,634 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:56:23,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-11 16:56:23,835 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:56:23,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:56:23,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1130736588, now seen corresponding path program 60 times [2020-10-11 16:56:23,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:56:23,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118642870] [2020-10-11 16:56:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:56:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:56:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:24,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118642870] [2020-10-11 16:56:24,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910835948] [2020-10-11 16:56:24,084 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:56:24,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 16:56:24,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:56:24,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:56:24,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:56:24,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:56:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:24,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:56:24,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 16:56:24,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215353676] [2020-10-11 16:56:24,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 16:56:24,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:56:24,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 16:56:24,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-11 16:56:24,755 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:56:24,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 658 places, 640 transitions, 27073 flow. Second operand 22 states. [2020-10-11 16:56:24,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:56:24,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:56:24,756 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:56:27,443 INFO L129 PetriNetUnfolder]: 564/4299 cut-off events. [2020-10-11 16:56:27,443 INFO L130 PetriNetUnfolder]: For 586528/587007 co-relation queries the response was YES. [2020-10-11 16:56:27,557 INFO L80 FinitePrefix]: Finished finitePrefix Result has 38849 conditions, 4299 events. 564/4299 cut-off events. For 586528/587007 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 42467 event pairs, 0 based on Foata normal form. 194/4032 useless extension candidates. Maximal degree in co-relation 38565. Up to 763 conditions per place. [2020-10-11 16:56:27,589 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 111 selfloop transitions, 541 changer transitions 8/694 dead transitions. [2020-10-11 16:56:27,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 694 transitions, 33140 flow [2020-10-11 16:56:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 16:56:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 16:56:27,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 1827 transitions. [2020-10-11 16:56:27,591 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8304545454545454 [2020-10-11 16:56:27,591 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 1827 transitions. [2020-10-11 16:56:27,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 1827 transitions. [2020-10-11 16:56:27,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:56:27,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 1827 transitions. [2020-10-11 16:56:27,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 41 states. [2020-10-11 16:56:27,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 41 states. [2020-10-11 16:56:27,595 INFO L81 ComplementDD]: Finished complementDD. Result 41 states. [2020-10-11 16:56:27,595 INFO L185 Difference]: Start difference. First operand has 658 places, 640 transitions, 27073 flow. Second operand 40 states and 1827 transitions. [2020-10-11 16:56:27,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 694 transitions, 33140 flow [2020-10-11 16:56:30,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 694 transitions, 31672 flow, removed 252 selfloop flow, removed 37 redundant places. [2020-10-11 16:56:30,110 INFO L241 Difference]: Finished difference. Result has 664 places, 648 transitions, 27640 flow [2020-10-11 16:56:30,111 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=25797, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=533, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=27640, PETRI_PLACES=664, PETRI_TRANSITIONS=648} [2020-10-11 16:56:30,111 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 609 predicate places. [2020-10-11 16:56:30,111 INFO L481 AbstractCegarLoop]: Abstraction has has 664 places, 648 transitions, 27640 flow [2020-10-11 16:56:30,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 16:56:30,111 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:56:30,112 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:56:30,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:56:30,312 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:56:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:56:30,313 INFO L82 PathProgramCache]: Analyzing trace with hash -772632958, now seen corresponding path program 61 times [2020-10-11 16:56:30,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:56:30,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653678786] [2020-10-11 16:56:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:56:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:56:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:30,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653678786] [2020-10-11 16:56:30,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662670955] [2020-10-11 16:56:30,571 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:56:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:56:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:56:30,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:56:30,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:56:30,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:56:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:30,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:56:30,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-10-11 16:56:30,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230160646] [2020-10-11 16:56:30,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:56:30,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:56:30,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:56:30,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-10-11 16:56:32,158 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:56:32,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 648 transitions, 27640 flow. Second operand 23 states. [2020-10-11 16:56:32,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:56:32,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:56:32,159 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:56:35,311 INFO L129 PetriNetUnfolder]: 570/4311 cut-off events. [2020-10-11 16:56:35,311 INFO L130 PetriNetUnfolder]: For 636099/636706 co-relation queries the response was YES. [2020-10-11 16:56:35,424 INFO L80 FinitePrefix]: Finished finitePrefix Result has 40089 conditions, 4311 events. 570/4311 cut-off events. For 636099/636706 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 42517 event pairs, 0 based on Foata normal form. 206/4055 useless extension candidates. Maximal degree in co-relation 39801. Up to 771 conditions per place. [2020-10-11 16:56:35,459 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 107 selfloop transitions, 554 changer transitions 17/712 dead transitions. [2020-10-11 16:56:35,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 712 transitions, 34970 flow [2020-10-11 16:56:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-11 16:56:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 16:56:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2099 transitions. [2020-10-11 16:56:35,461 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8296442687747035 [2020-10-11 16:56:35,461 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2099 transitions. [2020-10-11 16:56:35,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2099 transitions. [2020-10-11 16:56:35,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:56:35,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2099 transitions. [2020-10-11 16:56:35,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 47 states. [2020-10-11 16:56:35,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 47 states. [2020-10-11 16:56:35,465 INFO L81 ComplementDD]: Finished complementDD. Result 47 states. [2020-10-11 16:56:35,465 INFO L185 Difference]: Start difference. First operand has 664 places, 648 transitions, 27640 flow. Second operand 46 states and 2099 transitions. [2020-10-11 16:56:35,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 712 transitions, 34970 flow [2020-10-11 16:56:37,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 671 places, 712 transitions, 33278 flow, removed 364 selfloop flow, removed 35 redundant places. [2020-10-11 16:56:37,793 INFO L241 Difference]: Finished difference. Result has 681 places, 660 transitions, 28451 flow [2020-10-11 16:56:37,794 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=26330, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=28451, PETRI_PLACES=681, PETRI_TRANSITIONS=660} [2020-10-11 16:56:37,794 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 626 predicate places. [2020-10-11 16:56:37,794 INFO L481 AbstractCegarLoop]: Abstraction has has 681 places, 660 transitions, 28451 flow [2020-10-11 16:56:37,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:56:37,795 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:56:37,795 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:56:37,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-11 16:56:37,996 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:56:37,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:56:37,996 INFO L82 PathProgramCache]: Analyzing trace with hash -670501937, now seen corresponding path program 62 times [2020-10-11 16:56:37,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:56:37,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070976458] [2020-10-11 16:56:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:56:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:56:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:38,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070976458] [2020-10-11 16:56:38,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613808407] [2020-10-11 16:56:38,348 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:56:38,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:56:38,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:56:38,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 16:56:38,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:56:38,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:56:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:38,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:56:38,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 16:56:38,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095110539] [2020-10-11 16:56:38,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:56:38,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:56:38,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:56:38,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-11 16:56:38,790 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:56:38,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 681 places, 660 transitions, 28451 flow. Second operand 23 states. [2020-10-11 16:56:38,791 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:56:38,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:56:38,792 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:56:41,149 INFO L129 PetriNetUnfolder]: 566/4305 cut-off events. [2020-10-11 16:56:41,150 INFO L130 PetriNetUnfolder]: For 687269/687754 co-relation queries the response was YES. [2020-10-11 16:56:41,468 INFO L80 FinitePrefix]: Finished finitePrefix Result has 40804 conditions, 4305 events. 566/4305 cut-off events. For 687269/687754 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 42460 event pairs, 0 based on Foata normal form. 73/3915 useless extension candidates. Maximal degree in co-relation 40509. Up to 1003 conditions per place. [2020-10-11 16:56:41,525 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 612 selfloop transitions, 39 changer transitions 8/693 dead transitions. [2020-10-11 16:56:41,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 693 transitions, 32718 flow [2020-10-11 16:56:41,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 16:56:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-11 16:56:41,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1135 transitions. [2020-10-11 16:56:41,528 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8254545454545454 [2020-10-11 16:56:41,528 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1135 transitions. [2020-10-11 16:56:41,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1135 transitions. [2020-10-11 16:56:41,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:56:41,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1135 transitions. [2020-10-11 16:56:41,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-11 16:56:41,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-11 16:56:41,531 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-11 16:56:41,531 INFO L185 Difference]: Start difference. First operand has 681 places, 660 transitions, 28451 flow. Second operand 25 states and 1135 transitions. [2020-10-11 16:56:41,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 693 transitions, 32718 flow [2020-10-11 16:56:44,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 693 transitions, 30880 flow, removed 417 selfloop flow, removed 39 redundant places. [2020-10-11 16:56:44,736 INFO L241 Difference]: Finished difference. Result has 666 places, 662 transitions, 27023 flow [2020-10-11 16:56:44,737 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=26705, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=27023, PETRI_PLACES=666, PETRI_TRANSITIONS=662} [2020-10-11 16:56:44,737 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 611 predicate places. [2020-10-11 16:56:44,737 INFO L481 AbstractCegarLoop]: Abstraction has has 666 places, 662 transitions, 27023 flow [2020-10-11 16:56:44,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:56:44,737 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:56:44,738 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:56:44,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:56:44,938 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:56:44,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:56:44,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1342028739, now seen corresponding path program 63 times [2020-10-11 16:56:44,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:56:44,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856915249] [2020-10-11 16:56:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:56:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:56:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:45,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856915249] [2020-10-11 16:56:45,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665381942] [2020-10-11 16:56:45,305 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:56:45,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 16:56:45,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:56:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 16:56:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:56:45,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:56:45,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:56:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 1 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:45,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:56:45,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-10-11 16:56:45,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906509691] [2020-10-11 16:56:45,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 16:56:45,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:56:45,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 16:56:45,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-11 16:56:45,837 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:56:45,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 662 transitions, 27023 flow. Second operand 24 states. [2020-10-11 16:56:45,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:56:45,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:56:45,839 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:56:48,458 INFO L129 PetriNetUnfolder]: 568/4316 cut-off events. [2020-10-11 16:56:48,459 INFO L130 PetriNetUnfolder]: For 687291/687773 co-relation queries the response was YES. [2020-10-11 16:56:48,602 INFO L80 FinitePrefix]: Finished finitePrefix Result has 40220 conditions, 4316 events. 568/4316 cut-off events. For 687291/687773 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 42618 event pairs, 0 based on Foata normal form. 75/3926 useless extension candidates. Maximal degree in co-relation 39925. Up to 947 conditions per place. [2020-10-11 16:56:48,636 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 583 selfloop transitions, 71 changer transitions 8/696 dead transitions. [2020-10-11 16:56:48,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 696 transitions, 31422 flow [2020-10-11 16:56:48,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 16:56:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-11 16:56:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1272 transitions. [2020-10-11 16:56:48,638 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.825974025974026 [2020-10-11 16:56:48,638 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1272 transitions. [2020-10-11 16:56:48,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1272 transitions. [2020-10-11 16:56:48,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:56:48,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1272 transitions. [2020-10-11 16:56:48,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-11 16:56:48,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-11 16:56:48,640 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-11 16:56:48,640 INFO L185 Difference]: Start difference. First operand has 666 places, 662 transitions, 27023 flow. Second operand 28 states and 1272 transitions. [2020-10-11 16:56:48,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 696 transitions, 31422 flow [2020-10-11 16:56:51,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 670 places, 696 transitions, 31094 flow, removed 131 selfloop flow, removed 20 redundant places. [2020-10-11 16:56:52,005 INFO L241 Difference]: Finished difference. Result has 675 places, 664 transitions, 27189 flow [2020-10-11 16:56:52,005 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=26803, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=27189, PETRI_PLACES=675, PETRI_TRANSITIONS=664} [2020-10-11 16:56:52,005 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 620 predicate places. [2020-10-11 16:56:52,006 INFO L481 AbstractCegarLoop]: Abstraction has has 675 places, 664 transitions, 27189 flow [2020-10-11 16:56:52,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 16:56:52,006 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:56:52,006 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:56:52,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-11 16:56:52,207 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:56:52,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:56:52,208 INFO L82 PathProgramCache]: Analyzing trace with hash -423314263, now seen corresponding path program 64 times [2020-10-11 16:56:52,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:56:52,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975287099] [2020-10-11 16:56:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:56:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:56:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:52,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975287099] [2020-10-11 16:56:52,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776876759] [2020-10-11 16:56:52,558 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:56:52,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:56:52,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:56:52,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 16:56:52,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:56:52,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:56:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:52,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:56:52,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 16:56:52,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264138631] [2020-10-11 16:56:52,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:56:52,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:56:52,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:56:52,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-10-11 16:56:52,961 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:56:52,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 664 transitions, 27189 flow. Second operand 23 states. [2020-10-11 16:56:52,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:56:52,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:56:52,963 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:56:55,427 INFO L129 PetriNetUnfolder]: 570/4341 cut-off events. [2020-10-11 16:56:55,427 INFO L130 PetriNetUnfolder]: For 691145/691583 co-relation queries the response was YES. [2020-10-11 16:56:55,545 INFO L80 FinitePrefix]: Finished finitePrefix Result has 40443 conditions, 4341 events. 570/4341 cut-off events. For 691145/691583 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 42771 event pairs, 0 based on Foata normal form. 81/3954 useless extension candidates. Maximal degree in co-relation 40146. Up to 892 conditions per place. [2020-10-11 16:56:55,578 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 552 selfloop transitions, 104 changer transitions 8/698 dead transitions. [2020-10-11 16:56:55,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 698 transitions, 31589 flow [2020-10-11 16:56:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 16:56:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-11 16:56:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1318 transitions. [2020-10-11 16:56:55,580 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.826332288401254 [2020-10-11 16:56:55,580 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1318 transitions. [2020-10-11 16:56:55,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1318 transitions. [2020-10-11 16:56:55,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:56:55,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1318 transitions. [2020-10-11 16:56:55,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-11 16:56:55,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-11 16:56:55,582 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-11 16:56:55,582 INFO L185 Difference]: Start difference. First operand has 675 places, 664 transitions, 27189 flow. Second operand 29 states and 1318 transitions. [2020-10-11 16:56:55,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 698 transitions, 31589 flow [2020-10-11 16:56:59,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 675 places, 698 transitions, 31203 flow, removed 126 selfloop flow, removed 25 redundant places. [2020-10-11 16:56:59,069 INFO L241 Difference]: Finished difference. Result has 680 places, 666 transitions, 27367 flow [2020-10-11 16:56:59,070 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=26911, PETRI_DIFFERENCE_MINUEND_PLACES=647, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=27367, PETRI_PLACES=680, PETRI_TRANSITIONS=666} [2020-10-11 16:56:59,070 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 625 predicate places. [2020-10-11 16:56:59,070 INFO L481 AbstractCegarLoop]: Abstraction has has 680 places, 666 transitions, 27367 flow [2020-10-11 16:56:59,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:56:59,071 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:56:59,071 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:56:59,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-10-11 16:56:59,272 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:56:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:56:59,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1440873367, now seen corresponding path program 65 times [2020-10-11 16:56:59,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:56:59,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900911714] [2020-10-11 16:56:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:56:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:56:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:59,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900911714] [2020-10-11 16:56:59,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010817741] [2020-10-11 16:56:59,595 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:56:59,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 16:56:59,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:56:59,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 16:56:59,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:56:59,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:56:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:56:59,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:56:59,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 16:56:59,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521493343] [2020-10-11 16:56:59,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:56:59,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:56:59,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:56:59,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-11 16:56:59,970 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:56:59,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 666 transitions, 27367 flow. Second operand 23 states. [2020-10-11 16:56:59,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:56:59,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:56:59,971 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:57:02,488 INFO L129 PetriNetUnfolder]: 572/4352 cut-off events. [2020-10-11 16:57:02,488 INFO L130 PetriNetUnfolder]: For 694372/694854 co-relation queries the response was YES. [2020-10-11 16:57:02,624 INFO L80 FinitePrefix]: Finished finitePrefix Result has 40658 conditions, 4352 events. 572/4352 cut-off events. For 694372/694854 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 42931 event pairs, 0 based on Foata normal form. 98/3981 useless extension candidates. Maximal degree in co-relation 40359. Up to 767 conditions per place. [2020-10-11 16:57:02,676 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 468 selfloop transitions, 194 changer transitions 8/704 dead transitions. [2020-10-11 16:57:02,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 704 transitions, 32019 flow [2020-10-11 16:57:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 16:57:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-11 16:57:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1453 transitions. [2020-10-11 16:57:02,679 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8255681818181818 [2020-10-11 16:57:02,679 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1453 transitions. [2020-10-11 16:57:02,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1453 transitions. [2020-10-11 16:57:02,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:57:02,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1453 transitions. [2020-10-11 16:57:02,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-11 16:57:02,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-11 16:57:02,683 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-11 16:57:02,683 INFO L185 Difference]: Start difference. First operand has 680 places, 666 transitions, 27367 flow. Second operand 32 states and 1453 transitions. [2020-10-11 16:57:02,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 704 transitions, 32019 flow [2020-10-11 16:57:06,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 682 places, 704 transitions, 31563 flow, removed 130 selfloop flow, removed 26 redundant places. [2020-10-11 16:57:06,402 INFO L241 Difference]: Finished difference. Result has 687 places, 668 transitions, 27672 flow [2020-10-11 16:57:06,403 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=27027, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=27672, PETRI_PLACES=687, PETRI_TRANSITIONS=668} [2020-10-11 16:57:06,403 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 632 predicate places. [2020-10-11 16:57:06,403 INFO L481 AbstractCegarLoop]: Abstraction has has 687 places, 668 transitions, 27672 flow [2020-10-11 16:57:06,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:57:06,403 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:57:06,404 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:57:06,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:57:06,604 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:57:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:57:06,605 INFO L82 PathProgramCache]: Analyzing trace with hash -159301649, now seen corresponding path program 66 times [2020-10-11 16:57:06,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:57:06,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165378877] [2020-10-11 16:57:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:57:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:57:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:06,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165378877] [2020-10-11 16:57:06,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885871110] [2020-10-11 16:57:06,916 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:57:06,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 16:57:06,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:57:06,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 16:57:06,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:57:07,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:57:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:07,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:57:07,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 16:57:07,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556865023] [2020-10-11 16:57:07,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:57:07,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:57:07,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:57:07,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-11 16:57:07,688 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:57:07,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 668 transitions, 27672 flow. Second operand 23 states. [2020-10-11 16:57:07,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:57:07,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:57:07,689 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:57:10,146 INFO L129 PetriNetUnfolder]: 576/4388 cut-off events. [2020-10-11 16:57:10,146 INFO L130 PetriNetUnfolder]: For 701423/701905 co-relation queries the response was YES. [2020-10-11 16:57:10,253 INFO L80 FinitePrefix]: Finished finitePrefix Result has 41154 conditions, 4388 events. 576/4388 cut-off events. For 701423/701905 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 43368 event pairs, 0 based on Foata normal form. 111/4026 useless extension candidates. Maximal degree in co-relation 40852. Up to 775 conditions per place. [2020-10-11 16:57:10,286 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 380 selfloop transitions, 287 changer transitions 8/709 dead transitions. [2020-10-11 16:57:10,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 709 transitions, 32713 flow [2020-10-11 16:57:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 16:57:10,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 16:57:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1545 transitions. [2020-10-11 16:57:10,288 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8262032085561497 [2020-10-11 16:57:10,288 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1545 transitions. [2020-10-11 16:57:10,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1545 transitions. [2020-10-11 16:57:10,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:57:10,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1545 transitions. [2020-10-11 16:57:10,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-11 16:57:10,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-11 16:57:10,290 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-11 16:57:10,290 INFO L185 Difference]: Start difference. First operand has 687 places, 668 transitions, 27672 flow. Second operand 34 states and 1545 transitions. [2020-10-11 16:57:10,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 709 transitions, 32713 flow [2020-10-11 16:57:13,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 686 places, 709 transitions, 32068 flow, removed 135 selfloop flow, removed 31 redundant places. [2020-10-11 16:57:13,793 INFO L241 Difference]: Finished difference. Result has 691 places, 672 transitions, 28159 flow [2020-10-11 16:57:13,794 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=27151, PETRI_DIFFERENCE_MINUEND_PLACES=653, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=28159, PETRI_PLACES=691, PETRI_TRANSITIONS=672} [2020-10-11 16:57:13,794 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 636 predicate places. [2020-10-11 16:57:13,794 INFO L481 AbstractCegarLoop]: Abstraction has has 691 places, 672 transitions, 28159 flow [2020-10-11 16:57:13,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:57:13,795 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:57:13,795 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:57:13,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:57:13,996 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:57:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:57:13,996 INFO L82 PathProgramCache]: Analyzing trace with hash -965552933, now seen corresponding path program 67 times [2020-10-11 16:57:13,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:57:13,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420539271] [2020-10-11 16:57:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:57:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:57:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:14,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420539271] [2020-10-11 16:57:14,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013583691] [2020-10-11 16:57:14,335 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:57:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:57:14,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 16:57:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:57:14,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:57:14,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:57:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:14,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:57:14,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-10-11 16:57:14,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645242876] [2020-10-11 16:57:14,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 16:57:14,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:57:14,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 16:57:14,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2020-10-11 16:57:15,565 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:57:15,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 691 places, 672 transitions, 28159 flow. Second operand 24 states. [2020-10-11 16:57:15,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:57:15,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:57:15,567 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:57:18,185 INFO L129 PetriNetUnfolder]: 578/4406 cut-off events. [2020-10-11 16:57:18,185 INFO L130 PetriNetUnfolder]: For 702878/703360 co-relation queries the response was YES. [2020-10-11 16:57:18,289 INFO L80 FinitePrefix]: Finished finitePrefix Result has 41448 conditions, 4406 events. 578/4406 cut-off events. For 702878/703360 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 43486 event pairs, 0 based on Foata normal form. 127/4058 useless extension candidates. Maximal degree in co-relation 41146. Up to 779 conditions per place. [2020-10-11 16:57:18,320 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 331 selfloop transitions, 339 changer transitions 8/712 dead transitions. [2020-10-11 16:57:18,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 712 transitions, 33160 flow [2020-10-11 16:57:18,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 16:57:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-11 16:57:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1591 transitions. [2020-10-11 16:57:18,322 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8264935064935065 [2020-10-11 16:57:18,322 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1591 transitions. [2020-10-11 16:57:18,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1591 transitions. [2020-10-11 16:57:18,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:57:18,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1591 transitions. [2020-10-11 16:57:18,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-11 16:57:18,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-11 16:57:18,325 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-11 16:57:18,325 INFO L185 Difference]: Start difference. First operand has 691 places, 672 transitions, 28159 flow. Second operand 35 states and 1591 transitions. [2020-10-11 16:57:18,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 712 transitions, 33160 flow [2020-10-11 16:57:21,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 712 transitions, 32453 flow, removed 140 selfloop flow, removed 28 redundant places. [2020-10-11 16:57:21,631 INFO L241 Difference]: Finished difference. Result has 699 places, 674 transitions, 28536 flow [2020-10-11 16:57:21,632 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=27580, PETRI_DIFFERENCE_MINUEND_PLACES=660, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=28536, PETRI_PLACES=699, PETRI_TRANSITIONS=674} [2020-10-11 16:57:21,632 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 644 predicate places. [2020-10-11 16:57:21,632 INFO L481 AbstractCegarLoop]: Abstraction has has 699 places, 674 transitions, 28536 flow [2020-10-11 16:57:21,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 16:57:21,632 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:57:21,632 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:57:21,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-10-11 16:57:21,833 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:57:21,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:57:21,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1688027867, now seen corresponding path program 68 times [2020-10-11 16:57:21,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:57:21,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370556007] [2020-10-11 16:57:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:57:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:57:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:22,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370556007] [2020-10-11 16:57:22,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521465665] [2020-10-11 16:57:22,230 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:57:22,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:57:22,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:57:22,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 16:57:22,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:57:22,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:57:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:22,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:57:22,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 16:57:22,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234863623] [2020-10-11 16:57:22,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:57:22,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:57:22,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:57:22,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-11 16:57:22,845 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:57:22,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 674 transitions, 28536 flow. Second operand 23 states. [2020-10-11 16:57:22,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:57:22,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:57:22,846 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:57:25,653 INFO L129 PetriNetUnfolder]: 590/4514 cut-off events. [2020-10-11 16:57:25,653 INFO L130 PetriNetUnfolder]: For 720308/720750 co-relation queries the response was YES. [2020-10-11 16:57:25,835 INFO L80 FinitePrefix]: Finished finitePrefix Result has 42566 conditions, 4514 events. 590/4514 cut-off events. For 720308/720750 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 44939 event pairs, 0 based on Foata normal form. 158/4186 useless extension candidates. Maximal degree in co-relation 42262. Up to 799 conditions per place. [2020-10-11 16:57:25,869 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 241 selfloop transitions, 445 changer transitions 8/728 dead transitions. [2020-10-11 16:57:25,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 728 transitions, 34509 flow [2020-10-11 16:57:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 16:57:25,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-11 16:57:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1729 transitions. [2020-10-11 16:57:25,872 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8272727272727273 [2020-10-11 16:57:25,872 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1729 transitions. [2020-10-11 16:57:25,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1729 transitions. [2020-10-11 16:57:25,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:57:25,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1729 transitions. [2020-10-11 16:57:25,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 39 states. [2020-10-11 16:57:25,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 39 states. [2020-10-11 16:57:25,874 INFO L81 ComplementDD]: Finished complementDD. Result 39 states. [2020-10-11 16:57:25,875 INFO L185 Difference]: Start difference. First operand has 699 places, 674 transitions, 28536 flow. Second operand 38 states and 1729 transitions. [2020-10-11 16:57:25,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 728 transitions, 34509 flow [2020-10-11 16:57:29,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 701 places, 728 transitions, 33583 flow, removed 145 selfloop flow, removed 32 redundant places. [2020-10-11 16:57:29,830 INFO L241 Difference]: Finished difference. Result has 712 places, 688 transitions, 29879 flow [2020-10-11 16:57:29,830 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=27754, PETRI_DIFFERENCE_MINUEND_PLACES=664, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=431, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=29879, PETRI_PLACES=712, PETRI_TRANSITIONS=688} [2020-10-11 16:57:29,830 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 657 predicate places. [2020-10-11 16:57:29,831 INFO L481 AbstractCegarLoop]: Abstraction has has 712 places, 688 transitions, 29879 flow [2020-10-11 16:57:29,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:57:29,831 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:57:29,831 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:57:30,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:57:30,032 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:57:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:57:30,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1997173771, now seen corresponding path program 69 times [2020-10-11 16:57:30,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:57:30,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134864317] [2020-10-11 16:57:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:57:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:57:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:30,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134864317] [2020-10-11 16:57:30,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263461452] [2020-10-11 16:57:30,334 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:57:30,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 16:57:30,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:57:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 16:57:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:57:30,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:57:30,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:57:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:30,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:57:30,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-10-11 16:57:30,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752665568] [2020-10-11 16:57:30,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 16:57:30,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:57:30,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 16:57:30,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-10-11 16:57:30,722 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:57:30,723 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 688 transitions, 29879 flow. Second operand 24 states. [2020-10-11 16:57:30,723 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:57:30,723 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:57:30,723 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:57:33,832 INFO L129 PetriNetUnfolder]: 592/4525 cut-off events. [2020-10-11 16:57:33,833 INFO L130 PetriNetUnfolder]: For 739865/740371 co-relation queries the response was YES. [2020-10-11 16:57:34,005 INFO L80 FinitePrefix]: Finished finitePrefix Result has 43215 conditions, 4525 events. 592/4525 cut-off events. For 739865/740371 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 45027 event pairs, 0 based on Foata normal form. 183/4221 useless extension candidates. Maximal degree in co-relation 42903. Up to 803 conditions per place. [2020-10-11 16:57:34,040 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 209 selfloop transitions, 481 changer transitions 8/732 dead transitions. [2020-10-11 16:57:34,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 747 places, 732 transitions, 35397 flow [2020-10-11 16:57:34,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 16:57:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-11 16:57:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 1775 transitions. [2020-10-11 16:57:34,043 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8275058275058275 [2020-10-11 16:57:34,043 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 1775 transitions. [2020-10-11 16:57:34,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 1775 transitions. [2020-10-11 16:57:34,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:57:34,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 1775 transitions. [2020-10-11 16:57:34,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-11 16:57:34,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-11 16:57:34,046 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-11 16:57:34,046 INFO L185 Difference]: Start difference. First operand has 712 places, 688 transitions, 29879 flow. Second operand 39 states and 1775 transitions. [2020-10-11 16:57:34,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 747 places, 732 transitions, 35397 flow [2020-10-11 16:57:37,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 715 places, 732 transitions, 34391 flow, removed 200 selfloop flow, removed 32 redundant places. [2020-10-11 16:57:37,697 INFO L241 Difference]: Finished difference. Result has 720 places, 690 transitions, 30249 flow [2020-10-11 16:57:37,698 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=28983, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=30249, PETRI_PLACES=720, PETRI_TRANSITIONS=690} [2020-10-11 16:57:37,698 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 665 predicate places. [2020-10-11 16:57:37,698 INFO L481 AbstractCegarLoop]: Abstraction has has 720 places, 690 transitions, 30249 flow [2020-10-11 16:57:37,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 16:57:37,698 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:57:37,699 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:57:37,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-11 16:57:37,912 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:57:37,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:57:37,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1979958499, now seen corresponding path program 70 times [2020-10-11 16:57:37,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:57:37,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678184927] [2020-10-11 16:57:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:57:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:57:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:38,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678184927] [2020-10-11 16:57:38,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193436296] [2020-10-11 16:57:38,211 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:57:38,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:57:38,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:57:38,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 16:57:38,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:57:38,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:57:38,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:57:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:38,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:57:38,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-10-11 16:57:38,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918595148] [2020-10-11 16:57:38,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 16:57:38,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:57:38,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 16:57:38,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-10-11 16:57:39,479 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:57:39,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 690 transitions, 30249 flow. Second operand 24 states. [2020-10-11 16:57:39,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:57:39,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:57:39,480 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:57:42,485 INFO L129 PetriNetUnfolder]: 594/4550 cut-off events. [2020-10-11 16:57:42,485 INFO L130 PetriNetUnfolder]: For 747747/748203 co-relation queries the response was YES. [2020-10-11 16:57:42,646 INFO L80 FinitePrefix]: Finished finitePrefix Result has 43693 conditions, 4550 events. 594/4550 cut-off events. For 747747/748203 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 45331 event pairs, 0 based on Foata normal form. 203/4263 useless extension candidates. Maximal degree in co-relation 43382. Up to 805 conditions per place. [2020-10-11 16:57:42,681 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 171 selfloop transitions, 523 changer transitions 8/736 dead transitions. [2020-10-11 16:57:42,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 736 transitions, 36030 flow [2020-10-11 16:57:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 16:57:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-11 16:57:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 1867 transitions. [2020-10-11 16:57:42,683 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8279379157427937 [2020-10-11 16:57:42,683 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 1867 transitions. [2020-10-11 16:57:42,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 1867 transitions. [2020-10-11 16:57:42,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:57:42,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 1867 transitions. [2020-10-11 16:57:42,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 42 states. [2020-10-11 16:57:42,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 42 states. [2020-10-11 16:57:42,686 INFO L81 ComplementDD]: Finished complementDD. Result 42 states. [2020-10-11 16:57:42,686 INFO L185 Difference]: Start difference. First operand has 720 places, 690 transitions, 30249 flow. Second operand 41 states and 1867 transitions. [2020-10-11 16:57:42,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 736 transitions, 36030 flow [2020-10-11 16:57:46,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 736 transitions, 34694 flow, removed 171 selfloop flow, removed 38 redundant places. [2020-10-11 16:57:46,681 INFO L241 Difference]: Finished difference. Result has 725 places, 694 transitions, 30482 flow [2020-10-11 16:57:46,682 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=29101, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=519, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=30482, PETRI_PLACES=725, PETRI_TRANSITIONS=694} [2020-10-11 16:57:46,682 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 670 predicate places. [2020-10-11 16:57:46,682 INFO L481 AbstractCegarLoop]: Abstraction has has 725 places, 694 transitions, 30482 flow [2020-10-11 16:57:46,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 16:57:46,682 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:57:46,682 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:57:46,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:57:46,889 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:57:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:57:46,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1250033665, now seen corresponding path program 71 times [2020-10-11 16:57:46,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:57:46,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085174872] [2020-10-11 16:57:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:57:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:57:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:47,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085174872] [2020-10-11 16:57:47,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278900223] [2020-10-11 16:57:47,189 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:57:47,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 16:57:47,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:57:47,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 16:57:47,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:57:47,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:57:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:47,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:57:47,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 16:57:47,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719051054] [2020-10-11 16:57:47,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:57:47,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:57:47,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:57:47,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-11 16:57:48,244 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:57:48,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 725 places, 694 transitions, 30482 flow. Second operand 23 states. [2020-10-11 16:57:48,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:57:48,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:57:48,246 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:57:51,354 INFO L129 PetriNetUnfolder]: 600/4590 cut-off events. [2020-10-11 16:57:51,355 INFO L130 PetriNetUnfolder]: For 750185/750731 co-relation queries the response was YES. [2020-10-11 16:57:51,829 INFO L80 FinitePrefix]: Finished finitePrefix Result has 44141 conditions, 4590 events. 600/4590 cut-off events. For 750185/750731 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 45778 event pairs, 0 based on Foata normal form. 209/4305 useless extension candidates. Maximal degree in co-relation 43829. Up to 817 conditions per place. [2020-10-11 16:57:51,864 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 166 selfloop transitions, 537 changer transitions 8/745 dead transitions. [2020-10-11 16:57:51,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 763 places, 745 transitions, 36666 flow [2020-10-11 16:57:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 16:57:51,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 16:57:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 1913 transitions. [2020-10-11 16:57:51,866 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8281385281385282 [2020-10-11 16:57:51,866 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 1913 transitions. [2020-10-11 16:57:51,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 1913 transitions. [2020-10-11 16:57:51,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:57:51,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 1913 transitions. [2020-10-11 16:57:51,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 43 states. [2020-10-11 16:57:51,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 43 states. [2020-10-11 16:57:51,871 INFO L81 ComplementDD]: Finished complementDD. Result 43 states. [2020-10-11 16:57:51,871 INFO L185 Difference]: Start difference. First operand has 725 places, 694 transitions, 30482 flow. Second operand 42 states and 1913 transitions. [2020-10-11 16:57:51,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 763 places, 745 transitions, 36666 flow [2020-10-11 16:57:55,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 745 transitions, 35512 flow, removed 157 selfloop flow, removed 34 redundant places. [2020-10-11 16:57:55,028 INFO L241 Difference]: Finished difference. Result has 736 places, 702 transitions, 31264 flow [2020-10-11 16:57:55,029 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=29488, PETRI_DIFFERENCE_MINUEND_PLACES=688, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=31264, PETRI_PLACES=736, PETRI_TRANSITIONS=702} [2020-10-11 16:57:55,029 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 681 predicate places. [2020-10-11 16:57:55,029 INFO L481 AbstractCegarLoop]: Abstraction has has 736 places, 702 transitions, 31264 flow [2020-10-11 16:57:55,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:57:55,029 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:57:55,029 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:57:55,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-11 16:57:55,236 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:57:55,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:57:55,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1563929835, now seen corresponding path program 72 times [2020-10-11 16:57:55,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:57:55,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558422670] [2020-10-11 16:57:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:57:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:57:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:55,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558422670] [2020-10-11 16:57:55,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206234369] [2020-10-11 16:57:55,521 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:57:55,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 16:57:55,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:57:55,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 16:57:55,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:57:55,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:57:55,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:57:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:57:55,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:57:55,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-10-11 16:57:55,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812105844] [2020-10-11 16:57:55,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 16:57:55,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:57:55,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 16:57:55,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-10-11 16:57:56,449 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:57:56,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 702 transitions, 31264 flow. Second operand 24 states. [2020-10-11 16:57:56,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:57:56,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:57:56,451 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:58:00,059 INFO L129 PetriNetUnfolder]: 617/4675 cut-off events. [2020-10-11 16:58:00,059 INFO L130 PetriNetUnfolder]: For 786863/787487 co-relation queries the response was YES. [2020-10-11 16:58:00,246 INFO L80 FinitePrefix]: Finished finitePrefix Result has 45806 conditions, 4675 events. 617/4675 cut-off events. For 786863/787487 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 46638 event pairs, 0 based on Foata normal form. 230/4405 useless extension candidates. Maximal degree in co-relation 45490. Up to 839 conditions per place. [2020-10-11 16:58:00,282 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 149 selfloop transitions, 575 changer transitions 14/772 dead transitions. [2020-10-11 16:58:00,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 772 transitions, 39137 flow [2020-10-11 16:58:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 16:58:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-11 16:58:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2190 transitions. [2020-10-11 16:58:00,284 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8295454545454546 [2020-10-11 16:58:00,284 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2190 transitions. [2020-10-11 16:58:00,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2190 transitions. [2020-10-11 16:58:00,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:58:00,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2190 transitions. [2020-10-11 16:58:00,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2020-10-11 16:58:00,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 49 states. [2020-10-11 16:58:00,287 INFO L81 ComplementDD]: Finished complementDD. Result 49 states. [2020-10-11 16:58:00,287 INFO L185 Difference]: Start difference. First operand has 736 places, 702 transitions, 31264 flow. Second operand 48 states and 2190 transitions. [2020-10-11 16:58:00,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 772 transitions, 39137 flow [2020-10-11 16:58:04,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 745 places, 772 transitions, 37774 flow, removed 221 selfloop flow, removed 35 redundant places. [2020-10-11 16:58:04,795 INFO L241 Difference]: Finished difference. Result has 756 places, 718 transitions, 32523 flow [2020-10-11 16:58:04,796 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=30063, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=32523, PETRI_PLACES=756, PETRI_TRANSITIONS=718} [2020-10-11 16:58:04,796 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 701 predicate places. [2020-10-11 16:58:04,796 INFO L481 AbstractCegarLoop]: Abstraction has has 756 places, 718 transitions, 32523 flow [2020-10-11 16:58:04,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 16:58:04,796 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:58:04,796 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:58:05,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:58:05,002 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:58:05,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:58:05,002 INFO L82 PathProgramCache]: Analyzing trace with hash -293554688, now seen corresponding path program 73 times [2020-10-11 16:58:05,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:58:05,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205214411] [2020-10-11 16:58:05,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:58:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:58:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:58:05,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205214411] [2020-10-11 16:58:05,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805098034] [2020-10-11 16:58:05,326 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:58:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:58:05,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 16:58:05,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:58:05,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:58:05,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:58:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-11 16:58:05,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:58:05,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-10-11 16:58:05,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133084834] [2020-10-11 16:58:05,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 16:58:05,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:58:05,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 16:58:05,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-11 16:58:05,644 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:58:05,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 756 places, 718 transitions, 32523 flow. Second operand 24 states. [2020-10-11 16:58:05,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:58:05,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:58:05,645 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:58:09,258 INFO L129 PetriNetUnfolder]: 646/4927 cut-off events. [2020-10-11 16:58:09,258 INFO L130 PetriNetUnfolder]: For 968153/968738 co-relation queries the response was YES. [2020-10-11 16:58:09,439 INFO L80 FinitePrefix]: Finished finitePrefix Result has 50875 conditions, 4927 events. 646/4927 cut-off events. For 968153/968738 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 49099 event pairs, 0 based on Foata normal form. 240/4639 useless extension candidates. Maximal degree in co-relation 50551. Up to 891 conditions per place. [2020-10-11 16:58:09,478 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 147 selfloop transitions, 607 changer transitions 11/799 dead transitions. [2020-10-11 16:58:09,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 794 places, 799 transitions, 42243 flow [2020-10-11 16:58:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 16:58:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-11 16:58:09,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2007 transitions. [2020-10-11 16:58:09,480 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8293388429752067 [2020-10-11 16:58:09,481 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2007 transitions. [2020-10-11 16:58:09,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2007 transitions. [2020-10-11 16:58:09,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:58:09,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2007 transitions. [2020-10-11 16:58:09,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-11 16:58:09,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-11 16:58:09,483 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-11 16:58:09,483 INFO L185 Difference]: Start difference. First operand has 756 places, 718 transitions, 32523 flow. Second operand 44 states and 2007 transitions. [2020-10-11 16:58:09,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 794 places, 799 transitions, 42243 flow [2020-10-11 16:58:14,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 799 transitions, 39649 flow, removed 711 selfloop flow, removed 41 redundant places. [2020-10-11 16:58:14,580 INFO L241 Difference]: Finished difference. Result has 762 places, 751 transitions, 34378 flow [2020-10-11 16:58:14,581 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=30527, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=34378, PETRI_PLACES=762, PETRI_TRANSITIONS=751} [2020-10-11 16:58:14,581 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 707 predicate places. [2020-10-11 16:58:14,581 INFO L481 AbstractCegarLoop]: Abstraction has has 762 places, 751 transitions, 34378 flow [2020-10-11 16:58:14,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 16:58:14,581 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:58:14,581 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:58:14,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-11 16:58:14,782 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:58:14,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:58:14,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1190875581, now seen corresponding path program 74 times [2020-10-11 16:58:14,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:58:14,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103758986] [2020-10-11 16:58:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:58:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:58:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:58:15,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103758986] [2020-10-11 16:58:15,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675597257] [2020-10-11 16:58:15,128 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:58:15,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:58:15,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:58:15,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 16:58:15,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:58:15,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:58:15,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:58:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:58:15,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:58:15,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-10-11 16:58:15,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583347599] [2020-10-11 16:58:15,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 16:58:15,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:58:15,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 16:58:15,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-11 16:58:15,868 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:58:15,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 751 transitions, 34378 flow. Second operand 26 states. [2020-10-11 16:58:15,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:58:15,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:58:15,869 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:58:20,059 INFO L129 PetriNetUnfolder]: 658/4982 cut-off events. [2020-10-11 16:58:20,060 INFO L130 PetriNetUnfolder]: For 1033162/1033846 co-relation queries the response was YES. [2020-10-11 16:58:20,180 INFO L80 FinitePrefix]: Finished finitePrefix Result has 52476 conditions, 4982 events. 658/4982 cut-off events. For 1033162/1033846 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 49581 event pairs, 0 based on Foata normal form. 244/4693 useless extension candidates. Maximal degree in co-relation 52151. Up to 901 conditions per place. [2020-10-11 16:58:20,221 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 125 selfloop transitions, 645 changer transitions 14/818 dead transitions. [2020-10-11 16:58:20,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 806 places, 818 transitions, 43721 flow [2020-10-11 16:58:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-11 16:58:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-11 16:58:20,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2236 transitions. [2020-10-11 16:58:20,224 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8296846011131725 [2020-10-11 16:58:20,224 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2236 transitions. [2020-10-11 16:58:20,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2236 transitions. [2020-10-11 16:58:20,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:58:20,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2236 transitions. [2020-10-11 16:58:20,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 50 states. [2020-10-11 16:58:20,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 50 states. [2020-10-11 16:58:20,227 INFO L81 ComplementDD]: Finished complementDD. Result 50 states. [2020-10-11 16:58:20,227 INFO L185 Difference]: Start difference. First operand has 762 places, 751 transitions, 34378 flow. Second operand 49 states and 2236 transitions. [2020-10-11 16:58:20,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 806 places, 818 transitions, 43721 flow [2020-10-11 16:58:25,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 818 transitions, 41034 flow, removed 816 selfloop flow, removed 38 redundant places. [2020-10-11 16:58:25,205 INFO L241 Difference]: Finished difference. Result has 780 places, 763 transitions, 34739 flow [2020-10-11 16:58:25,205 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=32041, PETRI_DIFFERENCE_MINUEND_PLACES=720, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=34739, PETRI_PLACES=780, PETRI_TRANSITIONS=763} [2020-10-11 16:58:25,206 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 725 predicate places. [2020-10-11 16:58:25,206 INFO L481 AbstractCegarLoop]: Abstraction has has 780 places, 763 transitions, 34739 flow [2020-10-11 16:58:25,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 16:58:25,206 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:58:25,206 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:58:25,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:58:25,407 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:58:25,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:58:25,407 INFO L82 PathProgramCache]: Analyzing trace with hash 759445378, now seen corresponding path program 75 times [2020-10-11 16:58:25,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:58:25,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717787912] [2020-10-11 16:58:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:58:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:58:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:58:25,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717787912] [2020-10-11 16:58:25,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519580761] [2020-10-11 16:58:25,767 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:58:25,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-11 16:58:25,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:58:25,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 16:58:25,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:58:25,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:58:25,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:58:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:58:25,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:58:25,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-10-11 16:58:25,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342128744] [2020-10-11 16:58:25,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 16:58:25,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:58:25,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 16:58:25,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-10-11 16:58:26,459 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-11 16:58:26,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 763 transitions, 34739 flow. Second operand 27 states. [2020-10-11 16:58:26,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:58:26,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-11 16:58:26,460 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:58:30,739 INFO L129 PetriNetUnfolder]: 675/5088 cut-off events. [2020-10-11 16:58:30,739 INFO L130 PetriNetUnfolder]: For 1168492/1169158 co-relation queries the response was YES. [2020-10-11 16:58:30,979 INFO L80 FinitePrefix]: Finished finitePrefix Result has 54872 conditions, 5088 events. 675/5088 cut-off events. For 1168492/1169158 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 50192 event pairs, 0 based on Foata normal form. 247/4790 useless extension candidates. Maximal degree in co-relation 54538. Up to 897 conditions per place. [2020-10-11 16:58:31,022 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 141 selfloop transitions, 656 changer transitions 14/845 dead transitions. [2020-10-11 16:58:31,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 845 transitions, 45595 flow [2020-10-11 16:58:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-11 16:58:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 16:58:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2418 transitions. [2020-10-11 16:58:31,025 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8295025728987994 [2020-10-11 16:58:31,025 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2418 transitions. [2020-10-11 16:58:31,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2418 transitions. [2020-10-11 16:58:31,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:58:31,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2418 transitions. [2020-10-11 16:58:31,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 54 states. [2020-10-11 16:58:31,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 54 states. [2020-10-11 16:58:31,030 INFO L81 ComplementDD]: Finished complementDD. Result 54 states. [2020-10-11 16:58:31,031 INFO L185 Difference]: Start difference. First operand has 780 places, 763 transitions, 34739 flow. Second operand 53 states and 2418 transitions. [2020-10-11 16:58:31,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 845 transitions, 45595 flow [2020-10-11 16:58:38,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 786 places, 845 transitions, 42170 flow, removed 1092 selfloop flow, removed 41 redundant places. [2020-10-11 16:58:38,200 INFO L241 Difference]: Finished difference. Result has 800 places, 784 transitions, 35594 flow [2020-10-11 16:58:38,201 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=32532, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=636, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=35594, PETRI_PLACES=800, PETRI_TRANSITIONS=784} [2020-10-11 16:58:38,201 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 745 predicate places. [2020-10-11 16:58:38,201 INFO L481 AbstractCegarLoop]: Abstraction has has 800 places, 784 transitions, 35594 flow [2020-10-11 16:58:38,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 16:58:38,201 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:58:38,201 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:58:38,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:58:38,410 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:58:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:58:38,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1323693730, now seen corresponding path program 76 times [2020-10-11 16:58:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:58:38,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35764277] [2020-10-11 16:58:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:58:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:58:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 396 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 16:58:38,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35764277] [2020-10-11 16:58:38,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768946679] [2020-10-11 16:58:38,820 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:58:38,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:58:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:58:38,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:58:38,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:58:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 16:58:38,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 16:58:38,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2020-10-11 16:58:38,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104261408] [2020-10-11 16:58:38,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:58:38,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:58:38,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:58:38,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-10-11 16:58:39,331 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 55 [2020-10-11 16:58:39,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 784 transitions, 35594 flow. Second operand 23 states. [2020-10-11 16:58:39,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:58:39,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 55 [2020-10-11 16:58:39,332 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:59:01,393 INFO L129 PetriNetUnfolder]: 4011/23300 cut-off events. [2020-10-11 16:59:01,394 INFO L130 PetriNetUnfolder]: For 5086720/5087680 co-relation queries the response was YES. [2020-10-11 16:59:03,246 INFO L80 FinitePrefix]: Finished finitePrefix Result has 237615 conditions, 23300 events. 4011/23300 cut-off events. For 5086720/5087680 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 312911 event pairs, 1031 based on Foata normal form. 390/21146 useless extension candidates. Maximal degree in co-relation 237274. Up to 3932 conditions per place. [2020-10-11 16:59:03,447 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 12 selfloop transitions, 41 changer transitions 0/824 dead transitions. [2020-10-11 16:59:03,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 824 transitions, 35322 flow [2020-10-11 16:59:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 16:59:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-11 16:59:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1539 transitions. [2020-10-11 16:59:03,449 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8479338842975207 [2020-10-11 16:59:03,449 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1539 transitions. [2020-10-11 16:59:03,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1539 transitions. [2020-10-11 16:59:03,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:59:03,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1539 transitions. [2020-10-11 16:59:03,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-11 16:59:03,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-11 16:59:03,452 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-11 16:59:03,452 INFO L185 Difference]: Start difference. First operand has 800 places, 784 transitions, 35594 flow. Second operand 33 states and 1539 transitions. [2020-10-11 16:59:03,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 824 transitions, 35322 flow [2020-10-11 16:59:42,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 780 places, 824 transitions, 33103 flow, removed 498 selfloop flow, removed 47 redundant places. [2020-10-11 16:59:42,388 INFO L241 Difference]: Finished difference. Result has 781 places, 815 transitions, 33076 flow [2020-10-11 16:59:42,389 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=32905, PETRI_DIFFERENCE_MINUEND_PLACES=748, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=773, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=33076, PETRI_PLACES=781, PETRI_TRANSITIONS=815} [2020-10-11 16:59:42,389 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 726 predicate places. [2020-10-11 16:59:42,389 INFO L481 AbstractCegarLoop]: Abstraction has has 781 places, 815 transitions, 33076 flow [2020-10-11 16:59:42,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 16:59:42,389 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:59:42,389 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:59:42,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:59:42,590 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:59:42,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:59:42,591 INFO L82 PathProgramCache]: Analyzing trace with hash -236514583, now seen corresponding path program 77 times [2020-10-11 16:59:42,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:59:42,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491989627] [2020-10-11 16:59:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:59:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:59:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 333 proven. 101 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-11 16:59:42,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491989627] [2020-10-11 16:59:42,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636884422] [2020-10-11 16:59:42,920 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:59:42,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 16:59:42,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:59:42,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 16:59:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:59:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-11 16:59:43,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 16:59:43,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2020-10-11 16:59:43,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742662138] [2020-10-11 16:59:43,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 16:59:43,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:59:43,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 16:59:43,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-10-11 16:59:43,190 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 55 [2020-10-11 16:59:43,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 815 transitions, 33076 flow. Second operand 23 states. [2020-10-11 16:59:43,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:59:43,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 55 [2020-10-11 16:59:43,191 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 17:02:24,972 INFO L129 PetriNetUnfolder]: 27259/114957 cut-off events. [2020-10-11 17:02:24,972 INFO L130 PetriNetUnfolder]: For 23527030/23531740 co-relation queries the response was YES. [2020-10-11 17:03:03,480 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1176842 conditions, 114957 events. 27259/114957 cut-off events. For 23527030/23531740 co-relation queries the response was YES. Maximal size of possible extension queue 3640. Compared 1864257 event pairs, 7246 based on Foata normal form. 2088/110723 useless extension candidates. Maximal degree in co-relation 1176511. Up to 19865 conditions per place. [2020-10-11 17:03:03,600 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 0 selfloop transitions, 0 changer transitions 835/835 dead transitions. [2020-10-11 17:03:03,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 810 places, 835 transitions, 32124 flow [2020-10-11 17:03:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 17:03:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-11 17:03:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1539 transitions. [2020-10-11 17:03:03,601 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8479338842975207 [2020-10-11 17:03:03,601 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1539 transitions. [2020-10-11 17:03:03,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1539 transitions. [2020-10-11 17:03:03,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 17:03:03,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1539 transitions. [2020-10-11 17:03:03,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-11 17:03:03,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-11 17:03:03,604 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-11 17:03:03,604 INFO L185 Difference]: Start difference. First operand has 781 places, 815 transitions, 33076 flow. Second operand 33 states and 1539 transitions. [2020-10-11 17:03:03,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 810 places, 835 transitions, 32124 flow Received shutdown request... [2020-10-11 17:04:59,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 17:04:59,427 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-11 17:04:59,433 WARN L235 ceAbstractionStarter]: Timeout [2020-10-11 17:04:59,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 05:04:59 BasicIcfg [2020-10-11 17:04:59,434 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 17:04:59,436 INFO L168 Benchmark]: Toolchain (without parser) took 703165.06 ms. Allocated memory was 254.3 MB in the beginning and 10.5 GB in the end (delta: 10.2 GB). Free memory was 209.8 MB in the beginning and 4.5 GB in the end (delta: -4.3 GB). Peak memory consumption was 10.5 GB. Max. memory is 14.2 GB. [2020-10-11 17:04:59,436 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 254.3 MB. Free memory is still 231.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 17:04:59,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 616.61 ms. Allocated memory was 254.3 MB in the beginning and 324.5 MB in the end (delta: 70.3 MB). Free memory was 208.6 MB in the beginning and 280.9 MB in the end (delta: -72.3 MB). Peak memory consumption was 29.6 MB. Max. memory is 14.2 GB. [2020-10-11 17:04:59,437 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.47 ms. Allocated memory is still 324.5 MB. Free memory was 280.9 MB in the beginning and 279.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.2 GB. [2020-10-11 17:04:59,438 INFO L168 Benchmark]: Boogie Preprocessor took 26.54 ms. Allocated memory is still 324.5 MB. Free memory was 279.0 MB in the beginning and 276.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.2 GB. [2020-10-11 17:04:59,438 INFO L168 Benchmark]: RCFGBuilder took 431.23 ms. Allocated memory is still 324.5 MB. Free memory was 276.4 MB in the beginning and 255.8 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 14.2 GB. [2020-10-11 17:04:59,439 INFO L168 Benchmark]: TraceAbstraction took 702021.58 ms. Allocated memory was 324.5 MB in the beginning and 10.5 GB in the end (delta: 10.1 GB). Free memory was 255.8 MB in the beginning and 4.5 GB in the end (delta: -4.2 GB). Peak memory consumption was 10.5 GB. Max. memory is 14.2 GB. [2020-10-11 17:04:59,440 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 254.3 MB. Free memory is still 231.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 616.61 ms. Allocated memory was 254.3 MB in the beginning and 324.5 MB in the end (delta: 70.3 MB). Free memory was 208.6 MB in the beginning and 280.9 MB in the end (delta: -72.3 MB). Peak memory consumption was 29.6 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 63.47 ms. Allocated memory is still 324.5 MB. Free memory was 280.9 MB in the beginning and 279.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.54 ms. Allocated memory is still 324.5 MB. Free memory was 279.0 MB in the beginning and 276.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.2 GB. * RCFGBuilder took 431.23 ms. Allocated memory is still 324.5 MB. Free memory was 276.4 MB in the beginning and 255.8 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 14.2 GB. * TraceAbstraction took 702021.58 ms. Allocated memory was 324.5 MB in the beginning and 10.5 GB in the end (delta: 10.1 GB). Free memory was 255.8 MB in the beginning and 4.5 GB in the end (delta: -4.2 GB). Peak memory consumption was 10.5 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while executing RemoveRedundantFlow. - 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: TIMEOUT, OverallTime: 701.9s, OverallIterations: 84, TraceHistogramMax: 11, AutomataDifference: 656.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 795 SDtfs, 4227 SDslu, 4561 SDs, 0 SdLazy, 21843 SolverSat, 6101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9770 GetRequests, 6522 SyntacticMatches, 62 SemanticMatches, 3186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32281 ImplicationChecksByTransitivity, 54.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35594occurred in iteration=82, 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: 0.7s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 22.6s InterpolantComputationTime, 13350 NumberOfCodeBlocks, 13348 NumberOfCodeBlocksAsserted, 431 NumberOfCheckSat, 13188 ConstructedInterpolants, 0 QuantifiedInterpolants, 4995500 SizeOfPredicates, 1241 NumberOfNonLiveVariables, 13200 ConjunctsInSsa, 1482 ConjunctsInUnsatCore, 162 InterpolantComputations, 8 PerfectInterpolantSequences, 1697/26094 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown