/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 23:31:35,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 23:31:35,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 23:31:35,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 23:31:35,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 23:31:35,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 23:31:35,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 23:31:35,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 23:31:35,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 23:31:36,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 23:31:36,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 23:31:36,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 23:31:36,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 23:31:36,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 23:31:36,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 23:31:36,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 23:31:36,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 23:31:36,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 23:31:36,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 23:31:36,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 23:31:36,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 23:31:36,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 23:31:36,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 23:31:36,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 23:31:36,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 23:31:36,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 23:31:36,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 23:31:36,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 23:31:36,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 23:31:36,050 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 23:31:36,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 23:31:36,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 23:31:36,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 23:31:36,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 23:31:36,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 23:31:36,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 23:31:36,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 23:31:36,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 23:31:36,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 23:31:36,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 23:31:36,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 23:31:36,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2020-10-15 23:31:36,099 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 23:31:36,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 23:31:36,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 23:31:36,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 23:31:36,102 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 23:31:36,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 23:31:36,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 23:31:36,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 23:31:36,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 23:31:36,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 23:31:36,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 23:31:36,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 23:31:36,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 23:31:36,105 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 23:31:36,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 23:31:36,106 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 23:31:36,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 23:31:36,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 23:31:36,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 23:31:36,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 23:31:36,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 23:31:36,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 23:31:36,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 23:31:36,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 23:31:36,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 23:31:36,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 23:31:36,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 23:31:36,108 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-15 23:31:36,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 23:31:36,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 23:31:36,410 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 23:31:36,415 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 23:31:36,416 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 23:31:36,417 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 23:31:36,417 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-15 23:31:36,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fa171df0/f7ca41b2dd754c57a0a5b724519f9f01/FLAGd6ede3a44 [2020-10-15 23:31:37,056 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 23:31:37,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-15 23:31:37,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fa171df0/f7ca41b2dd754c57a0a5b724519f9f01/FLAGd6ede3a44 [2020-10-15 23:31:37,328 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fa171df0/f7ca41b2dd754c57a0a5b724519f9f01 [2020-10-15 23:31:37,337 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 23:31:37,338 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 23:31:37,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 23:31:37,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 23:31:37,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 23:31:37,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 11:31:37" (1/1) ... [2020-10-15 23:31:37,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba989d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37, skipping insertion in model container [2020-10-15 23:31:37,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 11:31:37" (1/1) ... [2020-10-15 23:31:37,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 23:31:37,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 23:31:37,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 23:31:37,863 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 23:31:37,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 23:31:37,986 INFO L208 MainTranslator]: Completed translation [2020-10-15 23:31:37,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37 WrapperNode [2020-10-15 23:31:37,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 23:31:37,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 23:31:37,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 23:31:37,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 23:31:37,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37" (1/1) ... [2020-10-15 23:31:38,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37" (1/1) ... [2020-10-15 23:31:38,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 23:31:38,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 23:31:38,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 23:31:38,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 23:31:38,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37" (1/1) ... [2020-10-15 23:31:38,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37" (1/1) ... [2020-10-15 23:31:38,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37" (1/1) ... [2020-10-15 23:31:38,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37" (1/1) ... [2020-10-15 23:31:38,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37" (1/1) ... [2020-10-15 23:31:38,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37" (1/1) ... [2020-10-15 23:31:38,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37" (1/1) ... [2020-10-15 23:31:38,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 23:31:38,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 23:31:38,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 23:31:38,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 23:31:38,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37" (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 [2020-10-15 23:31:38,141 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 23:31:38,141 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 23:31:38,141 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 23:31:38,142 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 23:31:38,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 23:31:38,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 23:31:38,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 23:31:38,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 23:31:38,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 23:31:38,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 23:31:38,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 23:31:38,144 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 23:31:38,452 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 23:31:38,453 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 23:31:38,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 11:31:38 BoogieIcfgContainer [2020-10-15 23:31:38,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 23:31:38,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 23:31:38,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 23:31:38,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 23:31:38,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 11:31:37" (1/3) ... [2020-10-15 23:31:38,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b17e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 11:31:38, skipping insertion in model container [2020-10-15 23:31:38,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:31:37" (2/3) ... [2020-10-15 23:31:38,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b17e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 11:31:38, skipping insertion in model container [2020-10-15 23:31:38,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 11:31:38" (3/3) ... [2020-10-15 23:31:38,464 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-10-15 23:31:38,476 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 23:31:38,483 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 23:31:38,484 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 23:31:38,509 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,509 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,509 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,509 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,510 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,510 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,511 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,511 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,511 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,511 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,512 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,512 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,512 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,512 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,513 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,513 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,513 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,513 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,514 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,514 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,514 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,514 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,515 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,515 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,515 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,516 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,516 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,516 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,516 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,517 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,520 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,520 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,521 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,521 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,521 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,521 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,527 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,527 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,527 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,528 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,528 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:31:38,545 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 23:31:38,563 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 23:31:38,563 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-15 23:31:38,564 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 23:31:38,564 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 23:31:38,564 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 23:31:38,564 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 23:31:38,564 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 23:31:38,564 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 23:31:38,575 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-15 23:31:38,621 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-15 23:31:38,621 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 23:31:38,627 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-15 23:31:38,627 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 57 transitions, 124 flow [2020-10-15 23:31:38,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 116 flow [2020-10-15 23:31:38,635 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 23:31:38,638 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 116 flow [2020-10-15 23:31:38,640 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 116 flow [2020-10-15 23:31:38,640 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 116 flow [2020-10-15 23:31:38,658 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-15 23:31:38,658 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 23:31:38,659 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-15 23:31:38,662 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-15 23:31:39,852 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-15 23:31:39,988 INFO L132 LiptonReduction]: Checked pairs total: 1022 [2020-10-15 23:31:39,988 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-15 23:31:39,991 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1357 [2020-10-15 23:31:39,999 INFO L129 PetriNetUnfolder]: 2/10 cut-off events. [2020-10-15 23:31:39,999 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 23:31:40,000 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:40,001 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 23:31:40,001 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:40,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:40,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1620974928, now seen corresponding path program 1 times [2020-10-15 23:31:40,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:40,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154235257] [2020-10-15 23:31:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:40,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154235257] [2020-10-15 23:31:40,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:31:40,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 23:31:40,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745604824] [2020-10-15 23:31:40,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 23:31:40,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:40,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 23:31:40,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 23:31:40,280 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:40,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 32 flow. Second operand 4 states. [2020-10-15 23:31:40,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:40,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:40,283 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:40,346 INFO L129 PetriNetUnfolder]: 30/61 cut-off events. [2020-10-15 23:31:40,346 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 23:31:40,347 INFO L80 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 61 events. 30/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 153 event pairs, 3 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 107. Up to 40 conditions per place. [2020-10-15 23:31:40,348 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 5 selfloop transitions, 7 changer transitions 3/22 dead transitions. [2020-10-15 23:31:40,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 80 flow [2020-10-15 23:31:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 23:31:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-15 23:31:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 367 transitions. [2020-10-15 23:31:40,365 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.685981308411215 [2020-10-15 23:31:40,366 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 367 transitions. [2020-10-15 23:31:40,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 367 transitions. [2020-10-15 23:31:40,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:40,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 367 transitions. [2020-10-15 23:31:40,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-15 23:31:40,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-15 23:31:40,384 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-15 23:31:40,386 INFO L185 Difference]: Start difference. First operand has 18 places, 13 transitions, 32 flow. Second operand 5 states and 367 transitions. [2020-10-15 23:31:40,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 80 flow [2020-10-15 23:31:40,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 22 transitions, 78 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-15 23:31:40,391 INFO L241 Difference]: Finished difference. Result has 23 places, 18 transitions, 75 flow [2020-10-15 23:31:40,394 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2020-10-15 23:31:40,395 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2020-10-15 23:31:40,395 INFO L481 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 75 flow [2020-10-15 23:31:40,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 23:31:40,396 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:40,396 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:40,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 23:31:40,396 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1316738742, now seen corresponding path program 1 times [2020-10-15 23:31:40,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:40,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198172118] [2020-10-15 23:31:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:40,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198172118] [2020-10-15 23:31:40,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:31:40,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 23:31:40,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373678231] [2020-10-15 23:31:40,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 23:31:40,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:40,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 23:31:40,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 23:31:40,519 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:40,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 75 flow. Second operand 5 states. [2020-10-15 23:31:40,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:40,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:40,520 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:40,616 INFO L129 PetriNetUnfolder]: 25/57 cut-off events. [2020-10-15 23:31:40,617 INFO L130 PetriNetUnfolder]: For 36/38 co-relation queries the response was YES. [2020-10-15 23:31:40,618 INFO L80 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 57 events. 25/57 cut-off events. For 36/38 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 142 event pairs, 0 based on Foata normal form. 4/61 useless extension candidates. Maximal degree in co-relation 161. Up to 33 conditions per place. [2020-10-15 23:31:40,622 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 5 selfloop transitions, 14 changer transitions 0/26 dead transitions. [2020-10-15 23:31:40,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 26 transitions, 152 flow [2020-10-15 23:31:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 23:31:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-15 23:31:40,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 509 transitions. [2020-10-15 23:31:40,630 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6795727636849133 [2020-10-15 23:31:40,631 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 509 transitions. [2020-10-15 23:31:40,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 509 transitions. [2020-10-15 23:31:40,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:40,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 509 transitions. [2020-10-15 23:31:40,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-15 23:31:40,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-15 23:31:40,640 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-15 23:31:40,640 INFO L185 Difference]: Start difference. First operand has 23 places, 18 transitions, 75 flow. Second operand 7 states and 509 transitions. [2020-10-15 23:31:40,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 26 transitions, 152 flow [2020-10-15 23:31:40,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-15 23:31:40,643 INFO L241 Difference]: Finished difference. Result has 31 places, 25 transitions, 160 flow [2020-10-15 23:31:40,644 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=160, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2020-10-15 23:31:40,648 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 13 predicate places. [2020-10-15 23:31:40,648 INFO L481 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 160 flow [2020-10-15 23:31:40,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 23:31:40,648 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:40,649 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:40,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 23:31:40,649 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:40,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1316538637, now seen corresponding path program 1 times [2020-10-15 23:31:40,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:40,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727023087] [2020-10-15 23:31:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:40,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727023087] [2020-10-15 23:31:40,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:31:40,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 23:31:40,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460997471] [2020-10-15 23:31:40,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 23:31:40,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:40,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 23:31:40,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 23:31:40,771 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:40,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 160 flow. Second operand 5 states. [2020-10-15 23:31:40,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:40,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:40,772 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:40,811 INFO L129 PetriNetUnfolder]: 27/62 cut-off events. [2020-10-15 23:31:40,811 INFO L130 PetriNetUnfolder]: For 119/125 co-relation queries the response was YES. [2020-10-15 23:31:40,812 INFO L80 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 62 events. 27/62 cut-off events. For 119/125 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 160 event pairs, 0 based on Foata normal form. 8/70 useless extension candidates. Maximal degree in co-relation 245. Up to 38 conditions per place. [2020-10-15 23:31:40,813 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 12 selfloop transitions, 9 changer transitions 0/28 dead transitions. [2020-10-15 23:31:40,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 228 flow [2020-10-15 23:31:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 23:31:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-15 23:31:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 363 transitions. [2020-10-15 23:31:40,816 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2020-10-15 23:31:40,817 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 363 transitions. [2020-10-15 23:31:40,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 363 transitions. [2020-10-15 23:31:40,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:40,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 363 transitions. [2020-10-15 23:31:40,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-15 23:31:40,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-15 23:31:40,820 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-15 23:31:40,820 INFO L185 Difference]: Start difference. First operand has 31 places, 25 transitions, 160 flow. Second operand 5 states and 363 transitions. [2020-10-15 23:31:40,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 228 flow [2020-10-15 23:31:40,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 201 flow, removed 10 selfloop flow, removed 2 redundant places. [2020-10-15 23:31:40,825 INFO L241 Difference]: Finished difference. Result has 34 places, 26 transitions, 170 flow [2020-10-15 23:31:40,826 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2020-10-15 23:31:40,826 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 16 predicate places. [2020-10-15 23:31:40,826 INFO L481 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 170 flow [2020-10-15 23:31:40,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 23:31:40,827 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:40,827 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:40,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 23:31:40,827 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:40,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:40,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1316560957, now seen corresponding path program 2 times [2020-10-15 23:31:40,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:40,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914550616] [2020-10-15 23:31:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:40,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914550616] [2020-10-15 23:31:40,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:31:40,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 23:31:40,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030340416] [2020-10-15 23:31:40,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 23:31:40,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:40,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 23:31:40,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 23:31:40,889 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:40,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 170 flow. Second operand 5 states. [2020-10-15 23:31:40,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:40,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:40,890 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:40,977 INFO L129 PetriNetUnfolder]: 31/72 cut-off events. [2020-10-15 23:31:40,977 INFO L130 PetriNetUnfolder]: For 166/168 co-relation queries the response was YES. [2020-10-15 23:31:40,978 INFO L80 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 72 events. 31/72 cut-off events. For 166/168 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 201 event pairs, 0 based on Foata normal form. 4/76 useless extension candidates. Maximal degree in co-relation 287. Up to 41 conditions per place. [2020-10-15 23:31:40,979 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 12 selfloop transitions, 16 changer transitions 0/35 dead transitions. [2020-10-15 23:31:40,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 293 flow [2020-10-15 23:31:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 23:31:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-15 23:31:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 509 transitions. [2020-10-15 23:31:40,982 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6795727636849133 [2020-10-15 23:31:40,982 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 509 transitions. [2020-10-15 23:31:40,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 509 transitions. [2020-10-15 23:31:40,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:40,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 509 transitions. [2020-10-15 23:31:40,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-15 23:31:40,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-15 23:31:40,986 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-15 23:31:40,986 INFO L185 Difference]: Start difference. First operand has 34 places, 26 transitions, 170 flow. Second operand 7 states and 509 transitions. [2020-10-15 23:31:40,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 293 flow [2020-10-15 23:31:40,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 274 flow, removed 1 selfloop flow, removed 4 redundant places. [2020-10-15 23:31:40,990 INFO L241 Difference]: Finished difference. Result has 39 places, 33 transitions, 261 flow [2020-10-15 23:31:40,991 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=261, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2020-10-15 23:31:40,991 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 21 predicate places. [2020-10-15 23:31:40,991 INFO L481 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 261 flow [2020-10-15 23:31:40,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 23:31:40,992 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:40,992 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:40,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 23:31:40,992 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:40,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2130750244, now seen corresponding path program 2 times [2020-10-15 23:31:40,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:40,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559919266] [2020-10-15 23:31:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:41,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559919266] [2020-10-15 23:31:41,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293089406] [2020-10-15 23:31:41,058 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 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 [2020-10-15 23:31:41,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:31:41,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:41,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 23:31:41,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:41,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:31:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:41,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:41,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-15 23:31:41,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492183440] [2020-10-15 23:31:41,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 23:31:41,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:41,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 23:31:41,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-15 23:31:41,236 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:41,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 261 flow. Second operand 10 states. [2020-10-15 23:31:41,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:41,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:41,237 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:41,321 INFO L129 PetriNetUnfolder]: 37/87 cut-off events. [2020-10-15 23:31:41,322 INFO L130 PetriNetUnfolder]: For 320/326 co-relation queries the response was YES. [2020-10-15 23:31:41,323 INFO L80 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 87 events. 37/87 cut-off events. For 320/326 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 280 event pairs, 0 based on Foata normal form. 8/95 useless extension candidates. Maximal degree in co-relation 423. Up to 49 conditions per place. [2020-10-15 23:31:41,324 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 13 selfloop transitions, 22 changer transitions 0/42 dead transitions. [2020-10-15 23:31:41,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 42 transitions, 424 flow [2020-10-15 23:31:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 23:31:41,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-15 23:31:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 654 transitions. [2020-10-15 23:31:41,327 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6791277258566978 [2020-10-15 23:31:41,328 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 654 transitions. [2020-10-15 23:31:41,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 654 transitions. [2020-10-15 23:31:41,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:41,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 654 transitions. [2020-10-15 23:31:41,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-15 23:31:41,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-15 23:31:41,332 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-15 23:31:41,332 INFO L185 Difference]: Start difference. First operand has 39 places, 33 transitions, 261 flow. Second operand 9 states and 654 transitions. [2020-10-15 23:31:41,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 42 transitions, 424 flow [2020-10-15 23:31:41,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 389 flow, removed 14 selfloop flow, removed 2 redundant places. [2020-10-15 23:31:41,338 INFO L241 Difference]: Finished difference. Result has 48 places, 41 transitions, 375 flow [2020-10-15 23:31:41,338 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=375, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2020-10-15 23:31:41,338 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 30 predicate places. [2020-10-15 23:31:41,338 INFO L481 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 375 flow [2020-10-15 23:31:41,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 23:31:41,339 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:41,339 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:41,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:41,554 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:41,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2146805888, now seen corresponding path program 3 times [2020-10-15 23:31:41,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:41,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273306153] [2020-10-15 23:31:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:41,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273306153] [2020-10-15 23:31:41,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721565416] [2020-10-15 23:31:41,610 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 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 [2020-10-15 23:31:41,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 23:31:41,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:41,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 23:31:41,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:41,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:41,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 23:31:41,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111579705] [2020-10-15 23:31:41,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 23:31:41,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:41,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 23:31:41,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-15 23:31:41,752 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:41,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 375 flow. Second operand 9 states. [2020-10-15 23:31:41,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:41,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:41,753 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:41,826 INFO L129 PetriNetUnfolder]: 39/92 cut-off events. [2020-10-15 23:31:41,826 INFO L130 PetriNetUnfolder]: For 558/564 co-relation queries the response was YES. [2020-10-15 23:31:41,827 INFO L80 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 92 events. 39/92 cut-off events. For 558/564 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 311 event pairs, 0 based on Foata normal form. 8/100 useless extension candidates. Maximal degree in co-relation 519. Up to 55 conditions per place. [2020-10-15 23:31:41,829 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 25 selfloop transitions, 14 changer transitions 0/46 dead transitions. [2020-10-15 23:31:41,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 514 flow [2020-10-15 23:31:41,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 23:31:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-15 23:31:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 507 transitions. [2020-10-15 23:31:41,831 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6769025367156208 [2020-10-15 23:31:41,831 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 507 transitions. [2020-10-15 23:31:41,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 507 transitions. [2020-10-15 23:31:41,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:41,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 507 transitions. [2020-10-15 23:31:41,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-15 23:31:41,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-15 23:31:41,835 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-15 23:31:41,835 INFO L185 Difference]: Start difference. First operand has 48 places, 41 transitions, 375 flow. Second operand 7 states and 507 transitions. [2020-10-15 23:31:41,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 514 flow [2020-10-15 23:31:41,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 449 flow, removed 24 selfloop flow, removed 4 redundant places. [2020-10-15 23:31:41,841 INFO L241 Difference]: Finished difference. Result has 53 places, 44 transitions, 397 flow [2020-10-15 23:31:41,841 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=397, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2020-10-15 23:31:41,842 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 35 predicate places. [2020-10-15 23:31:41,842 INFO L481 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 397 flow [2020-10-15 23:31:41,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 23:31:41,842 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:41,842 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:42,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:42,058 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:42,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2136260618, now seen corresponding path program 4 times [2020-10-15 23:31:42,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:42,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598304132] [2020-10-15 23:31:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:42,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598304132] [2020-10-15 23:31:42,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267925196] [2020-10-15 23:31:42,110 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 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 [2020-10-15 23:31:42,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:31:42,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 23:31:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:42,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:31:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:42,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:42,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 23:31:42,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234076594] [2020-10-15 23:31:42,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 23:31:42,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:42,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 23:31:42,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-15 23:31:42,219 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:42,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 397 flow. Second operand 9 states. [2020-10-15 23:31:42,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:42,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:42,220 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:42,353 INFO L129 PetriNetUnfolder]: 44/105 cut-off events. [2020-10-15 23:31:42,353 INFO L130 PetriNetUnfolder]: For 777/783 co-relation queries the response was YES. [2020-10-15 23:31:42,354 INFO L80 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 105 events. 44/105 cut-off events. For 777/783 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 372 event pairs, 0 based on Foata normal form. 8/113 useless extension candidates. Maximal degree in co-relation 601. Up to 56 conditions per place. [2020-10-15 23:31:42,356 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 21 selfloop transitions, 26 changer transitions 0/54 dead transitions. [2020-10-15 23:31:42,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 54 transitions, 623 flow [2020-10-15 23:31:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 23:31:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-15 23:31:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 654 transitions. [2020-10-15 23:31:42,359 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6791277258566978 [2020-10-15 23:31:42,359 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 654 transitions. [2020-10-15 23:31:42,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 654 transitions. [2020-10-15 23:31:42,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:42,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 654 transitions. [2020-10-15 23:31:42,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-15 23:31:42,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-15 23:31:42,363 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-15 23:31:42,364 INFO L185 Difference]: Start difference. First operand has 53 places, 44 transitions, 397 flow. Second operand 9 states and 654 transitions. [2020-10-15 23:31:42,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 54 transitions, 623 flow [2020-10-15 23:31:42,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 54 transitions, 607 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-15 23:31:42,371 INFO L241 Difference]: Finished difference. Result has 61 places, 52 transitions, 576 flow [2020-10-15 23:31:42,371 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=576, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2020-10-15 23:31:42,372 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 43 predicate places. [2020-10-15 23:31:42,372 INFO L481 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 576 flow [2020-10-15 23:31:42,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 23:31:42,372 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:42,372 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:42,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:42,586 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:42,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1331687031, now seen corresponding path program 1 times [2020-10-15 23:31:42,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:42,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437471899] [2020-10-15 23:31:42,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:42,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437471899] [2020-10-15 23:31:42,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:31:42,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 23:31:42,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506736631] [2020-10-15 23:31:42,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 23:31:42,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:42,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 23:31:42,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 23:31:42,671 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:42,671 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 576 flow. Second operand 6 states. [2020-10-15 23:31:42,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:42,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:42,672 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:42,744 INFO L129 PetriNetUnfolder]: 45/108 cut-off events. [2020-10-15 23:31:42,744 INFO L130 PetriNetUnfolder]: For 1129/1135 co-relation queries the response was YES. [2020-10-15 23:31:42,745 INFO L80 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 108 events. 45/108 cut-off events. For 1129/1135 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 390 event pairs, 0 based on Foata normal form. 7/115 useless extension candidates. Maximal degree in co-relation 706. Up to 61 conditions per place. [2020-10-15 23:31:42,747 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 27 selfloop transitions, 21 changer transitions 0/55 dead transitions. [2020-10-15 23:31:42,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 714 flow [2020-10-15 23:31:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 23:31:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-15 23:31:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 508 transitions. [2020-10-15 23:31:42,750 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.678237650200267 [2020-10-15 23:31:42,750 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 508 transitions. [2020-10-15 23:31:42,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 508 transitions. [2020-10-15 23:31:42,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:42,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 508 transitions. [2020-10-15 23:31:42,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-15 23:31:42,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-15 23:31:42,754 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-15 23:31:42,754 INFO L185 Difference]: Start difference. First operand has 61 places, 52 transitions, 576 flow. Second operand 7 states and 508 transitions. [2020-10-15 23:31:42,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 714 flow [2020-10-15 23:31:42,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 621 flow, removed 34 selfloop flow, removed 5 redundant places. [2020-10-15 23:31:42,765 INFO L241 Difference]: Finished difference. Result has 63 places, 53 transitions, 556 flow [2020-10-15 23:31:42,766 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=556, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2020-10-15 23:31:42,766 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 45 predicate places. [2020-10-15 23:31:42,766 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 556 flow [2020-10-15 23:31:42,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 23:31:42,766 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:42,767 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:42,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 23:31:42,767 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:42,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:42,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1629082941, now seen corresponding path program 2 times [2020-10-15 23:31:42,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:42,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708968445] [2020-10-15 23:31:42,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:42,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708968445] [2020-10-15 23:31:42,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:31:42,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 23:31:42,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957381242] [2020-10-15 23:31:42,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 23:31:42,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:42,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 23:31:42,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 23:31:42,867 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:42,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 556 flow. Second operand 6 states. [2020-10-15 23:31:42,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:42,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:42,868 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:42,954 INFO L129 PetriNetUnfolder]: 51/123 cut-off events. [2020-10-15 23:31:42,954 INFO L130 PetriNetUnfolder]: For 1372/1378 co-relation queries the response was YES. [2020-10-15 23:31:42,955 INFO L80 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 123 events. 51/123 cut-off events. For 1372/1378 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 475 event pairs, 0 based on Foata normal form. 8/131 useless extension candidates. Maximal degree in co-relation 811. Up to 62 conditions per place. [2020-10-15 23:31:42,957 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 20 selfloop transitions, 36 changer transitions 0/63 dead transitions. [2020-10-15 23:31:42,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 834 flow [2020-10-15 23:31:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 23:31:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-15 23:31:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 654 transitions. [2020-10-15 23:31:42,960 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6791277258566978 [2020-10-15 23:31:42,960 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 654 transitions. [2020-10-15 23:31:42,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 654 transitions. [2020-10-15 23:31:42,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:42,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 654 transitions. [2020-10-15 23:31:42,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-15 23:31:42,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-15 23:31:42,964 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-15 23:31:42,964 INFO L185 Difference]: Start difference. First operand has 63 places, 53 transitions, 556 flow. Second operand 9 states and 654 transitions. [2020-10-15 23:31:42,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 834 flow [2020-10-15 23:31:42,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 795 flow, removed 1 selfloop flow, removed 6 redundant places. [2020-10-15 23:31:42,973 INFO L241 Difference]: Finished difference. Result has 68 places, 61 transitions, 774 flow [2020-10-15 23:31:42,973 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=774, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2020-10-15 23:31:42,973 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 50 predicate places. [2020-10-15 23:31:42,973 INFO L481 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 774 flow [2020-10-15 23:31:42,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 23:31:42,974 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:42,974 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:42,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 23:31:42,974 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:42,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:42,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1628726410, now seen corresponding path program 3 times [2020-10-15 23:31:42,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:42,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983419286] [2020-10-15 23:31:42,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:43,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983419286] [2020-10-15 23:31:43,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758890185] [2020-10-15 23:31:43,034 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 [2020-10-15 23:31:43,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 23:31:43,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:43,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:43,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:43,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:31:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:43,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:43,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-15 23:31:43,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241720278] [2020-10-15 23:31:43,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 23:31:43,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:43,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 23:31:43,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-15 23:31:43,173 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:43,174 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 774 flow. Second operand 12 states. [2020-10-15 23:31:43,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:43,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:43,174 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:43,282 INFO L129 PetriNetUnfolder]: 58/140 cut-off events. [2020-10-15 23:31:43,283 INFO L130 PetriNetUnfolder]: For 1958/1964 co-relation queries the response was YES. [2020-10-15 23:31:43,284 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 140 events. 58/140 cut-off events. For 1958/1964 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 580 event pairs, 0 based on Foata normal form. 8/148 useless extension candidates. Maximal degree in co-relation 1061. Up to 81 conditions per place. [2020-10-15 23:31:43,286 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 32 selfloop transitions, 32 changer transitions 0/71 dead transitions. [2020-10-15 23:31:43,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 71 transitions, 1096 flow [2020-10-15 23:31:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 23:31:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-15 23:31:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 799 transitions. [2020-10-15 23:31:43,289 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6788445199660152 [2020-10-15 23:31:43,290 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 799 transitions. [2020-10-15 23:31:43,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 799 transitions. [2020-10-15 23:31:43,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:43,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 799 transitions. [2020-10-15 23:31:43,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-15 23:31:43,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-15 23:31:43,295 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-15 23:31:43,295 INFO L185 Difference]: Start difference. First operand has 68 places, 61 transitions, 774 flow. Second operand 11 states and 799 transitions. [2020-10-15 23:31:43,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 71 transitions, 1096 flow [2020-10-15 23:31:43,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 1013 flow, removed 33 selfloop flow, removed 4 redundant places. [2020-10-15 23:31:43,307 INFO L241 Difference]: Finished difference. Result has 77 places, 70 transitions, 951 flow [2020-10-15 23:31:43,307 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=951, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2020-10-15 23:31:43,307 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 59 predicate places. [2020-10-15 23:31:43,307 INFO L481 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 951 flow [2020-10-15 23:31:43,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 23:31:43,308 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:43,308 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:43,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:43,522 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1799756541, now seen corresponding path program 3 times [2020-10-15 23:31:43,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:43,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393701993] [2020-10-15 23:31:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:43,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393701993] [2020-10-15 23:31:43,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:31:43,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 23:31:43,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632908653] [2020-10-15 23:31:43,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 23:31:43,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:43,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 23:31:43,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 23:31:43,572 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:43,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 951 flow. Second operand 6 states. [2020-10-15 23:31:43,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:43,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:43,573 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:43,670 INFO L129 PetriNetUnfolder]: 64/155 cut-off events. [2020-10-15 23:31:43,670 INFO L130 PetriNetUnfolder]: For 2665/2671 co-relation queries the response was YES. [2020-10-15 23:31:43,672 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1300 conditions, 155 events. 64/155 cut-off events. For 2665/2671 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 663 event pairs, 0 based on Foata normal form. 8/163 useless extension candidates. Maximal degree in co-relation 1261. Up to 83 conditions per place. [2020-10-15 23:31:43,675 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 30 selfloop transitions, 43 changer transitions 0/80 dead transitions. [2020-10-15 23:31:43,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 80 transitions, 1325 flow [2020-10-15 23:31:43,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 23:31:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-15 23:31:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 654 transitions. [2020-10-15 23:31:43,678 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6791277258566978 [2020-10-15 23:31:43,679 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 654 transitions. [2020-10-15 23:31:43,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 654 transitions. [2020-10-15 23:31:43,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:43,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 654 transitions. [2020-10-15 23:31:43,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-15 23:31:43,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-15 23:31:43,683 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-15 23:31:43,683 INFO L185 Difference]: Start difference. First operand has 77 places, 70 transitions, 951 flow. Second operand 9 states and 654 transitions. [2020-10-15 23:31:43,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 80 transitions, 1325 flow [2020-10-15 23:31:43,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 1175 flow, removed 61 selfloop flow, removed 6 redundant places. [2020-10-15 23:31:43,701 INFO L241 Difference]: Finished difference. Result has 82 places, 78 transitions, 1128 flow [2020-10-15 23:31:43,701 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1128, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2020-10-15 23:31:43,701 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 64 predicate places. [2020-10-15 23:31:43,702 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 1128 flow [2020-10-15 23:31:43,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 23:31:43,702 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:43,702 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:43,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 23:31:43,702 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:43,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2126472733, now seen corresponding path program 5 times [2020-10-15 23:31:43,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:43,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388572541] [2020-10-15 23:31:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:43,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388572541] [2020-10-15 23:31:43,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864846391] [2020-10-15 23:31:43,761 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 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 [2020-10-15 23:31:43,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:31:43,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:43,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:43,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:43,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:43,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405249809] [2020-10-15 23:31:43,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:43,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:43,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:43,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:43,896 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:43,897 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 1128 flow. Second operand 11 states. [2020-10-15 23:31:43,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:43,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:43,898 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:44,012 INFO L129 PetriNetUnfolder]: 66/163 cut-off events. [2020-10-15 23:31:44,012 INFO L130 PetriNetUnfolder]: For 3058/3064 co-relation queries the response was YES. [2020-10-15 23:31:44,014 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 163 events. 66/163 cut-off events. For 3058/3064 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 726 event pairs, 0 based on Foata normal form. 8/171 useless extension candidates. Maximal degree in co-relation 1315. Up to 98 conditions per place. [2020-10-15 23:31:44,016 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 57 selfloop transitions, 21 changer transitions 0/85 dead transitions. [2020-10-15 23:31:44,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 1398 flow [2020-10-15 23:31:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 23:31:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-15 23:31:44,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 579 transitions. [2020-10-15 23:31:44,020 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6764018691588785 [2020-10-15 23:31:44,020 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 579 transitions. [2020-10-15 23:31:44,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 579 transitions. [2020-10-15 23:31:44,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:44,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 579 transitions. [2020-10-15 23:31:44,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-15 23:31:44,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-15 23:31:44,026 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-15 23:31:44,026 INFO L185 Difference]: Start difference. First operand has 82 places, 78 transitions, 1128 flow. Second operand 8 states and 579 transitions. [2020-10-15 23:31:44,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 1398 flow [2020-10-15 23:31:44,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 85 transitions, 1271 flow, removed 46 selfloop flow, removed 5 redundant places. [2020-10-15 23:31:44,052 INFO L241 Difference]: Finished difference. Result has 86 places, 80 transitions, 1117 flow [2020-10-15 23:31:44,053 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1117, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2020-10-15 23:31:44,053 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 68 predicate places. [2020-10-15 23:31:44,053 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 1117 flow [2020-10-15 23:31:44,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:44,053 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:44,054 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:44,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-15 23:31:44,268 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:44,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1800261283, now seen corresponding path program 6 times [2020-10-15 23:31:44,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:44,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93743484] [2020-10-15 23:31:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:44,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93743484] [2020-10-15 23:31:44,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796528799] [2020-10-15 23:31:44,335 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 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 [2020-10-15 23:31:44,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 23:31:44,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:44,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:44,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:44,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:44,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:44,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71302562] [2020-10-15 23:31:44,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:44,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:44,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:44,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:44,490 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:44,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 1117 flow. Second operand 11 states. [2020-10-15 23:31:44,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:44,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:44,491 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:44,633 INFO L129 PetriNetUnfolder]: 70/174 cut-off events. [2020-10-15 23:31:44,633 INFO L130 PetriNetUnfolder]: For 3406/3412 co-relation queries the response was YES. [2020-10-15 23:31:44,634 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1430 conditions, 174 events. 70/174 cut-off events. For 3406/3412 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 808 event pairs, 0 based on Foata normal form. 8/182 useless extension candidates. Maximal degree in co-relation 1385. Up to 95 conditions per place. [2020-10-15 23:31:44,637 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 50 selfloop transitions, 32 changer transitions 0/89 dead transitions. [2020-10-15 23:31:44,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 89 transitions, 1398 flow [2020-10-15 23:31:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 23:31:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-15 23:31:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 724 transitions. [2020-10-15 23:31:44,640 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6766355140186916 [2020-10-15 23:31:44,640 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 724 transitions. [2020-10-15 23:31:44,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 724 transitions. [2020-10-15 23:31:44,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:44,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 724 transitions. [2020-10-15 23:31:44,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-15 23:31:44,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-15 23:31:44,645 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-15 23:31:44,645 INFO L185 Difference]: Start difference. First operand has 86 places, 80 transitions, 1117 flow. Second operand 10 states and 724 transitions. [2020-10-15 23:31:44,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 89 transitions, 1398 flow [2020-10-15 23:31:44,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 89 transitions, 1361 flow, removed 6 selfloop flow, removed 5 redundant places. [2020-10-15 23:31:44,664 INFO L241 Difference]: Finished difference. Result has 92 places, 84 transitions, 1239 flow [2020-10-15 23:31:44,665 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1239, PETRI_PLACES=92, PETRI_TRANSITIONS=84} [2020-10-15 23:31:44,665 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 74 predicate places. [2020-10-15 23:31:44,665 INFO L481 AbstractCegarLoop]: Abstraction has has 92 places, 84 transitions, 1239 flow [2020-10-15 23:31:44,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:44,665 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:44,666 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:44,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:44,879 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:44,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1799569363, now seen corresponding path program 7 times [2020-10-15 23:31:44,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:44,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430749472] [2020-10-15 23:31:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:44,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430749472] [2020-10-15 23:31:44,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487480140] [2020-10-15 23:31:44,976 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 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 [2020-10-15 23:31:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:45,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:45,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:45,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:45,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:45,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321793643] [2020-10-15 23:31:45,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:45,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:45,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:45,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:45,159 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:45,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 84 transitions, 1239 flow. Second operand 11 states. [2020-10-15 23:31:45,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:45,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:45,162 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:45,365 INFO L129 PetriNetUnfolder]: 72/179 cut-off events. [2020-10-15 23:31:45,365 INFO L130 PetriNetUnfolder]: For 3340/3346 co-relation queries the response was YES. [2020-10-15 23:31:45,367 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1483 conditions, 179 events. 72/179 cut-off events. For 3340/3346 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 820 event pairs, 0 based on Foata normal form. 8/187 useless extension candidates. Maximal degree in co-relation 1436. Up to 92 conditions per place. [2020-10-15 23:31:45,369 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 44 selfloop transitions, 39 changer transitions 0/90 dead transitions. [2020-10-15 23:31:45,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 90 transitions, 1490 flow [2020-10-15 23:31:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 23:31:45,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-15 23:31:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 725 transitions. [2020-10-15 23:31:45,374 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.677570093457944 [2020-10-15 23:31:45,374 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 725 transitions. [2020-10-15 23:31:45,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 725 transitions. [2020-10-15 23:31:45,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:45,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 725 transitions. [2020-10-15 23:31:45,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-15 23:31:45,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-15 23:31:45,384 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-15 23:31:45,384 INFO L185 Difference]: Start difference. First operand has 92 places, 84 transitions, 1239 flow. Second operand 10 states and 725 transitions. [2020-10-15 23:31:45,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 90 transitions, 1490 flow [2020-10-15 23:31:45,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 90 transitions, 1435 flow, removed 6 selfloop flow, removed 8 redundant places. [2020-10-15 23:31:45,408 INFO L241 Difference]: Finished difference. Result has 94 places, 85 transitions, 1317 flow [2020-10-15 23:31:45,408 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1317, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2020-10-15 23:31:45,408 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 76 predicate places. [2020-10-15 23:31:45,408 INFO L481 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 1317 flow [2020-10-15 23:31:45,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:45,409 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:45,409 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:45,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-15 23:31:45,625 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1799547043, now seen corresponding path program 8 times [2020-10-15 23:31:45,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:45,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182806763] [2020-10-15 23:31:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:45,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182806763] [2020-10-15 23:31:45,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695821982] [2020-10-15 23:31:45,675 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 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 [2020-10-15 23:31:45,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:31:45,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:45,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:45,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:45,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:31:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:45,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:45,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:45,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452326188] [2020-10-15 23:31:45,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:45,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:45,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:45,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:45,789 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:45,790 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 1317 flow. Second operand 11 states. [2020-10-15 23:31:45,790 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:45,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:45,790 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:46,048 INFO L129 PetriNetUnfolder]: 76/189 cut-off events. [2020-10-15 23:31:46,048 INFO L130 PetriNetUnfolder]: For 3652/3658 co-relation queries the response was YES. [2020-10-15 23:31:46,050 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1606 conditions, 189 events. 76/189 cut-off events. For 3652/3658 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 890 event pairs, 0 based on Foata normal form. 8/197 useless extension candidates. Maximal degree in co-relation 1559. Up to 98 conditions per place. [2020-10-15 23:31:46,053 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 46 selfloop transitions, 45 changer transitions 0/98 dead transitions. [2020-10-15 23:31:46,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 98 transitions, 1779 flow [2020-10-15 23:31:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 23:31:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-15 23:31:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 799 transitions. [2020-10-15 23:31:46,055 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6788445199660152 [2020-10-15 23:31:46,055 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 799 transitions. [2020-10-15 23:31:46,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 799 transitions. [2020-10-15 23:31:46,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:46,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 799 transitions. [2020-10-15 23:31:46,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-15 23:31:46,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-15 23:31:46,059 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-15 23:31:46,059 INFO L185 Difference]: Start difference. First operand has 94 places, 85 transitions, 1317 flow. Second operand 11 states and 799 transitions. [2020-10-15 23:31:46,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 98 transitions, 1779 flow [2020-10-15 23:31:46,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 1713 flow, removed 5 selfloop flow, removed 8 redundant places. [2020-10-15 23:31:46,100 INFO L241 Difference]: Finished difference. Result has 99 places, 94 transitions, 1617 flow [2020-10-15 23:31:46,100 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1617, PETRI_PLACES=99, PETRI_TRANSITIONS=94} [2020-10-15 23:31:46,101 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 81 predicate places. [2020-10-15 23:31:46,101 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 94 transitions, 1617 flow [2020-10-15 23:31:46,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:46,101 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:46,101 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:46,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 23:31:46,316 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:46,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:46,318 INFO L82 PathProgramCache]: Analyzing trace with hash -153403589, now seen corresponding path program 4 times [2020-10-15 23:31:46,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:46,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279042939] [2020-10-15 23:31:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:46,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279042939] [2020-10-15 23:31:46,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787636998] [2020-10-15 23:31:46,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:46,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:31:46,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:46,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:46,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:46,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:46,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:46,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019870054] [2020-10-15 23:31:46,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:46,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:46,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:46,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:46,604 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:46,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 94 transitions, 1617 flow. Second operand 11 states. [2020-10-15 23:31:46,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:46,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:46,606 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:46,730 INFO L129 PetriNetUnfolder]: 77/192 cut-off events. [2020-10-15 23:31:46,731 INFO L130 PetriNetUnfolder]: For 4295/4301 co-relation queries the response was YES. [2020-10-15 23:31:46,733 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 192 events. 77/192 cut-off events. For 4295/4301 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 910 event pairs, 0 based on Foata normal form. 7/199 useless extension candidates. Maximal degree in co-relation 1687. Up to 113 conditions per place. [2020-10-15 23:31:46,737 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 65 selfloop transitions, 28 changer transitions 0/100 dead transitions. [2020-10-15 23:31:46,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 100 transitions, 1892 flow [2020-10-15 23:31:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 23:31:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-15 23:31:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 580 transitions. [2020-10-15 23:31:46,741 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.677570093457944 [2020-10-15 23:31:46,741 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 580 transitions. [2020-10-15 23:31:46,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 580 transitions. [2020-10-15 23:31:46,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:46,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 580 transitions. [2020-10-15 23:31:46,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-15 23:31:46,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-15 23:31:46,753 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-15 23:31:46,753 INFO L185 Difference]: Start difference. First operand has 99 places, 94 transitions, 1617 flow. Second operand 8 states and 580 transitions. [2020-10-15 23:31:46,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 100 transitions, 1892 flow [2020-10-15 23:31:46,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 100 transitions, 1681 flow, removed 82 selfloop flow, removed 7 redundant places. [2020-10-15 23:31:46,789 INFO L241 Difference]: Finished difference. Result has 101 places, 96 transitions, 1528 flow [2020-10-15 23:31:46,790 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1528, PETRI_PLACES=101, PETRI_TRANSITIONS=96} [2020-10-15 23:31:46,790 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 83 predicate places. [2020-10-15 23:31:46,790 INFO L481 AbstractCegarLoop]: Abstraction has has 101 places, 96 transitions, 1528 flow [2020-10-15 23:31:46,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:46,790 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:46,791 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:47,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 23:31:47,006 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:47,007 INFO L82 PathProgramCache]: Analyzing trace with hash -153402628, now seen corresponding path program 5 times [2020-10-15 23:31:47,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:47,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812110275] [2020-10-15 23:31:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:47,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812110275] [2020-10-15 23:31:47,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54862275] [2020-10-15 23:31:47,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:47,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:31:47,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:47,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:47,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:47,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:47,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:47,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094523833] [2020-10-15 23:31:47,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:47,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:47,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:47,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:47,233 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:47,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 1528 flow. Second operand 11 states. [2020-10-15 23:31:47,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:47,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:47,236 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:47,346 INFO L129 PetriNetUnfolder]: 78/195 cut-off events. [2020-10-15 23:31:47,346 INFO L130 PetriNetUnfolder]: For 4422/4424 co-relation queries the response was YES. [2020-10-15 23:31:47,348 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1689 conditions, 195 events. 78/195 cut-off events. For 4422/4424 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 931 event pairs, 0 based on Foata normal form. 3/198 useless extension candidates. Maximal degree in co-relation 1637. Up to 109 conditions per place. [2020-10-15 23:31:47,350 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 61 selfloop transitions, 33 changer transitions 0/101 dead transitions. [2020-10-15 23:31:47,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 101 transitions, 1796 flow [2020-10-15 23:31:47,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 23:31:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-15 23:31:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 652 transitions. [2020-10-15 23:31:47,352 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6770508826583593 [2020-10-15 23:31:47,352 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 652 transitions. [2020-10-15 23:31:47,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 652 transitions. [2020-10-15 23:31:47,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:47,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 652 transitions. [2020-10-15 23:31:47,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-15 23:31:47,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-15 23:31:47,355 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-15 23:31:47,355 INFO L185 Difference]: Start difference. First operand has 101 places, 96 transitions, 1528 flow. Second operand 9 states and 652 transitions. [2020-10-15 23:31:47,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 101 transitions, 1796 flow [2020-10-15 23:31:47,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 101 transitions, 1763 flow, removed 0 selfloop flow, removed 5 redundant places. [2020-10-15 23:31:47,377 INFO L241 Difference]: Finished difference. Result has 106 places, 98 transitions, 1631 flow [2020-10-15 23:31:47,377 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1631, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2020-10-15 23:31:47,378 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 88 predicate places. [2020-10-15 23:31:47,378 INFO L481 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 1631 flow [2020-10-15 23:31:47,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:47,378 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:47,378 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:47,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 23:31:47,588 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:47,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:47,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1048414575, now seen corresponding path program 6 times [2020-10-15 23:31:47,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:47,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889262826] [2020-10-15 23:31:47,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:47,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889262826] [2020-10-15 23:31:47,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593767509] [2020-10-15 23:31:47,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:47,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 23:31:47,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:47,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:47,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:47,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:47,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:47,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662577427] [2020-10-15 23:31:47,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:47,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:47,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:47,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:47,786 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:47,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 1631 flow. Second operand 11 states. [2020-10-15 23:31:47,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:47,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:47,787 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:47,915 INFO L129 PetriNetUnfolder]: 79/197 cut-off events. [2020-10-15 23:31:47,915 INFO L130 PetriNetUnfolder]: For 4841/4843 co-relation queries the response was YES. [2020-10-15 23:31:47,917 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1769 conditions, 197 events. 79/197 cut-off events. For 4841/4843 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 942 event pairs, 0 based on Foata normal form. 3/200 useless extension candidates. Maximal degree in co-relation 1715. Up to 110 conditions per place. [2020-10-15 23:31:47,920 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 59 selfloop transitions, 36 changer transitions 0/102 dead transitions. [2020-10-15 23:31:47,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 102 transitions, 1895 flow [2020-10-15 23:31:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 23:31:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-15 23:31:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 653 transitions. [2020-10-15 23:31:47,922 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780893042575286 [2020-10-15 23:31:47,922 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 653 transitions. [2020-10-15 23:31:47,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 653 transitions. [2020-10-15 23:31:47,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:47,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 653 transitions. [2020-10-15 23:31:47,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-15 23:31:47,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-15 23:31:47,925 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-15 23:31:47,925 INFO L185 Difference]: Start difference. First operand has 106 places, 98 transitions, 1631 flow. Second operand 9 states and 653 transitions. [2020-10-15 23:31:47,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 102 transitions, 1895 flow [2020-10-15 23:31:47,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 102 transitions, 1862 flow, removed 0 selfloop flow, removed 5 redundant places. [2020-10-15 23:31:47,947 INFO L241 Difference]: Finished difference. Result has 110 places, 99 transitions, 1727 flow [2020-10-15 23:31:47,947 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1598, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1727, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2020-10-15 23:31:47,948 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 92 predicate places. [2020-10-15 23:31:47,948 INFO L481 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 1727 flow [2020-10-15 23:31:47,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:47,948 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:47,948 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:48,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 23:31:48,164 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:48,164 INFO L82 PathProgramCache]: Analyzing trace with hash -530808037, now seen corresponding path program 7 times [2020-10-15 23:31:48,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:48,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145257614] [2020-10-15 23:31:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:48,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145257614] [2020-10-15 23:31:48,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244974219] [2020-10-15 23:31:48,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:48,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:48,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:48,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:31:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:48,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:48,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:48,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050953839] [2020-10-15 23:31:48,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:48,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:48,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:48,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:48,421 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:48,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 99 transitions, 1727 flow. Second operand 11 states. [2020-10-15 23:31:48,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:48,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:48,422 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:48,694 INFO L129 PetriNetUnfolder]: 85/212 cut-off events. [2020-10-15 23:31:48,694 INFO L130 PetriNetUnfolder]: For 5878/5880 co-relation queries the response was YES. [2020-10-15 23:31:48,696 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1994 conditions, 212 events. 85/212 cut-off events. For 5878/5880 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1039 event pairs, 0 based on Foata normal form. 4/216 useless extension candidates. Maximal degree in co-relation 1939. Up to 106 conditions per place. [2020-10-15 23:31:48,699 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 44 selfloop transitions, 59 changer transitions 0/110 dead transitions. [2020-10-15 23:31:48,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 110 transitions, 2215 flow [2020-10-15 23:31:48,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 23:31:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-15 23:31:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 799 transitions. [2020-10-15 23:31:48,702 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6788445199660152 [2020-10-15 23:31:48,702 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 799 transitions. [2020-10-15 23:31:48,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 799 transitions. [2020-10-15 23:31:48,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:48,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 799 transitions. [2020-10-15 23:31:48,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-15 23:31:48,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-15 23:31:48,705 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-15 23:31:48,705 INFO L185 Difference]: Start difference. First operand has 110 places, 99 transitions, 1727 flow. Second operand 11 states and 799 transitions. [2020-10-15 23:31:48,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 110 transitions, 2215 flow [2020-10-15 23:31:48,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 110 transitions, 2164 flow, removed 0 selfloop flow, removed 7 redundant places. [2020-10-15 23:31:48,736 INFO L241 Difference]: Finished difference. Result has 116 places, 107 transitions, 2101 flow [2020-10-15 23:31:48,736 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2101, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2020-10-15 23:31:48,736 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 98 predicate places. [2020-10-15 23:31:48,736 INFO L481 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 2101 flow [2020-10-15 23:31:48,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:48,737 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:48,737 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:48,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:48,951 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1677920624, now seen corresponding path program 8 times [2020-10-15 23:31:48,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:48,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246660491] [2020-10-15 23:31:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:49,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246660491] [2020-10-15 23:31:49,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827785038] [2020-10-15 23:31:49,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:49,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:31:49,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:49,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:49,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:49,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:31:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:49,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:49,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:49,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557619957] [2020-10-15 23:31:49,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:49,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:49,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:49,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:49,131 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:49,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 2101 flow. Second operand 11 states. [2020-10-15 23:31:49,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:49,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:49,132 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:49,379 INFO L129 PetriNetUnfolder]: 90/224 cut-off events. [2020-10-15 23:31:49,379 INFO L130 PetriNetUnfolder]: For 7574/7580 co-relation queries the response was YES. [2020-10-15 23:31:49,381 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2304 conditions, 224 events. 90/224 cut-off events. For 7574/7580 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1135 event pairs, 0 based on Foata normal form. 8/232 useless extension candidates. Maximal degree in co-relation 2246. Up to 112 conditions per place. [2020-10-15 23:31:49,385 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 49 selfloop transitions, 61 changer transitions 0/117 dead transitions. [2020-10-15 23:31:49,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 117 transitions, 2587 flow [2020-10-15 23:31:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 23:31:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-15 23:31:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 799 transitions. [2020-10-15 23:31:49,387 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6788445199660152 [2020-10-15 23:31:49,387 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 799 transitions. [2020-10-15 23:31:49,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 799 transitions. [2020-10-15 23:31:49,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:49,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 799 transitions. [2020-10-15 23:31:49,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-15 23:31:49,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-15 23:31:49,391 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-15 23:31:49,391 INFO L185 Difference]: Start difference. First operand has 116 places, 107 transitions, 2101 flow. Second operand 11 states and 799 transitions. [2020-10-15 23:31:49,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 117 transitions, 2587 flow [2020-10-15 23:31:49,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 117 transitions, 2456 flow, removed 51 selfloop flow, removed 6 redundant places. [2020-10-15 23:31:49,422 INFO L241 Difference]: Finished difference. Result has 123 places, 114 transitions, 2374 flow [2020-10-15 23:31:49,422 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2374, PETRI_PLACES=123, PETRI_TRANSITIONS=114} [2020-10-15 23:31:49,422 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 105 predicate places. [2020-10-15 23:31:49,422 INFO L481 AbstractCegarLoop]: Abstraction has has 123 places, 114 transitions, 2374 flow [2020-10-15 23:31:49,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:49,422 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:49,423 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:49,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-10-15 23:31:49,635 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:49,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:49,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1677919663, now seen corresponding path program 9 times [2020-10-15 23:31:49,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:49,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169491040] [2020-10-15 23:31:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:49,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169491040] [2020-10-15 23:31:49,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355163329] [2020-10-15 23:31:49,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:49,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 23:31:49,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:49,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:49,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:31:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:49,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:49,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:49,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092506774] [2020-10-15 23:31:49,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:49,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:49,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:49,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:49,810 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:49,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 114 transitions, 2374 flow. Second operand 11 states. [2020-10-15 23:31:49,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:49,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:49,811 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:50,079 INFO L129 PetriNetUnfolder]: 97/243 cut-off events. [2020-10-15 23:31:50,080 INFO L130 PetriNetUnfolder]: For 9270/9272 co-relation queries the response was YES. [2020-10-15 23:31:50,082 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2647 conditions, 243 events. 97/243 cut-off events. For 9270/9272 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1254 event pairs, 0 based on Foata normal form. 4/247 useless extension candidates. Maximal degree in co-relation 2585. Up to 124 conditions per place. [2020-10-15 23:31:50,086 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 47 selfloop transitions, 70 changer transitions 0/124 dead transitions. [2020-10-15 23:31:50,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 124 transitions, 2943 flow [2020-10-15 23:31:50,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 23:31:50,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 23:31:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1089 transitions. [2020-10-15 23:31:50,088 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2020-10-15 23:31:50,088 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1089 transitions. [2020-10-15 23:31:50,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1089 transitions. [2020-10-15 23:31:50,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:50,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1089 transitions. [2020-10-15 23:31:50,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-15 23:31:50,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-15 23:31:50,092 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-15 23:31:50,092 INFO L185 Difference]: Start difference. First operand has 123 places, 114 transitions, 2374 flow. Second operand 15 states and 1089 transitions. [2020-10-15 23:31:50,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 124 transitions, 2943 flow [2020-10-15 23:31:50,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 124 transitions, 2712 flow, removed 85 selfloop flow, removed 7 redundant places. [2020-10-15 23:31:50,128 INFO L241 Difference]: Finished difference. Result has 133 places, 123 transitions, 2633 flow [2020-10-15 23:31:50,129 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2633, PETRI_PLACES=133, PETRI_TRANSITIONS=123} [2020-10-15 23:31:50,129 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 115 predicate places. [2020-10-15 23:31:50,129 INFO L481 AbstractCegarLoop]: Abstraction has has 133 places, 123 transitions, 2633 flow [2020-10-15 23:31:50,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:50,129 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:50,129 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:50,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:50,330 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:50,331 INFO L82 PathProgramCache]: Analyzing trace with hash 110727694, now seen corresponding path program 4 times [2020-10-15 23:31:50,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:50,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613463281] [2020-10-15 23:31:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:50,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613463281] [2020-10-15 23:31:50,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956965144] [2020-10-15 23:31:50,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:50,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:31:50,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:50,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:31:50,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:50,529 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:31:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:50,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:50,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-15 23:31:50,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690577570] [2020-10-15 23:31:50,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 23:31:50,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:50,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 23:31:50,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-15 23:31:50,553 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:50,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 123 transitions, 2633 flow. Second operand 14 states. [2020-10-15 23:31:50,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:50,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:50,554 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:50,733 INFO L129 PetriNetUnfolder]: 105/265 cut-off events. [2020-10-15 23:31:50,733 INFO L130 PetriNetUnfolder]: For 10097/10103 co-relation queries the response was YES. [2020-10-15 23:31:50,736 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2939 conditions, 265 events. 105/265 cut-off events. For 10097/10103 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1425 event pairs, 0 based on Foata normal form. 8/273 useless extension candidates. Maximal degree in co-relation 2874. Up to 161 conditions per place. [2020-10-15 23:31:50,741 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 84 selfloop transitions, 43 changer transitions 0/134 dead transitions. [2020-10-15 23:31:50,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 134 transitions, 3266 flow [2020-10-15 23:31:50,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 23:31:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-15 23:31:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 944 transitions. [2020-10-15 23:31:50,743 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6786484543493889 [2020-10-15 23:31:50,743 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 944 transitions. [2020-10-15 23:31:50,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 944 transitions. [2020-10-15 23:31:50,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:50,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 944 transitions. [2020-10-15 23:31:50,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-15 23:31:50,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-15 23:31:50,747 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-15 23:31:50,747 INFO L185 Difference]: Start difference. First operand has 133 places, 123 transitions, 2633 flow. Second operand 13 states and 944 transitions. [2020-10-15 23:31:50,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 134 transitions, 3266 flow [2020-10-15 23:31:50,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 134 transitions, 3022 flow, removed 84 selfloop flow, removed 12 redundant places. [2020-10-15 23:31:50,780 INFO L241 Difference]: Finished difference. Result has 136 places, 133 transitions, 2850 flow [2020-10-15 23:31:50,780 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=2407, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2850, PETRI_PLACES=136, PETRI_TRANSITIONS=133} [2020-10-15 23:31:50,780 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 118 predicate places. [2020-10-15 23:31:50,781 INFO L481 AbstractCegarLoop]: Abstraction has has 136 places, 133 transitions, 2850 flow [2020-10-15 23:31:50,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 23:31:50,781 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:50,781 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:50,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 23:31:50,988 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:50,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:50,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1496354426, now seen corresponding path program 10 times [2020-10-15 23:31:50,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:50,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074623900] [2020-10-15 23:31:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:51,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074623900] [2020-10-15 23:31:51,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672765627] [2020-10-15 23:31:51,046 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 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 [2020-10-15 23:31:51,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:31:51,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:51,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:51,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:51,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:51,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:51,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632442238] [2020-10-15 23:31:51,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:51,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:51,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:51,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:51,173 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:51,174 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 133 transitions, 2850 flow. Second operand 11 states. [2020-10-15 23:31:51,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:51,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:51,174 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:51,341 INFO L129 PetriNetUnfolder]: 110/278 cut-off events. [2020-10-15 23:31:51,342 INFO L130 PetriNetUnfolder]: For 10532/10538 co-relation queries the response was YES. [2020-10-15 23:31:51,345 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3007 conditions, 278 events. 110/278 cut-off events. For 10532/10538 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1530 event pairs, 0 based on Foata normal form. 7/285 useless extension candidates. Maximal degree in co-relation 2941. Up to 171 conditions per place. [2020-10-15 23:31:51,352 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 109 selfloop transitions, 32 changer transitions 0/148 dead transitions. [2020-10-15 23:31:51,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 148 transitions, 3452 flow [2020-10-15 23:31:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 23:31:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-15 23:31:51,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 651 transitions. [2020-10-15 23:31:51,354 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67601246105919 [2020-10-15 23:31:51,354 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 651 transitions. [2020-10-15 23:31:51,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 651 transitions. [2020-10-15 23:31:51,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:51,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 651 transitions. [2020-10-15 23:31:51,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-15 23:31:51,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-15 23:31:51,358 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-15 23:31:51,359 INFO L185 Difference]: Start difference. First operand has 136 places, 133 transitions, 2850 flow. Second operand 9 states and 651 transitions. [2020-10-15 23:31:51,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 148 transitions, 3452 flow [2020-10-15 23:31:51,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 148 transitions, 3260 flow, removed 74 selfloop flow, removed 8 redundant places. [2020-10-15 23:31:51,406 INFO L241 Difference]: Finished difference. Result has 139 places, 141 transitions, 3010 flow [2020-10-15 23:31:51,407 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3010, PETRI_PLACES=139, PETRI_TRANSITIONS=141} [2020-10-15 23:31:51,407 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 121 predicate places. [2020-10-15 23:31:51,407 INFO L481 AbstractCegarLoop]: Abstraction has has 139 places, 141 transitions, 3010 flow [2020-10-15 23:31:51,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:51,407 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:51,407 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:51,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:51,622 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:51,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:51,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1429031418, now seen corresponding path program 11 times [2020-10-15 23:31:51,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:51,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719000426] [2020-10-15 23:31:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:51,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719000426] [2020-10-15 23:31:51,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246241900] [2020-10-15 23:31:51,672 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 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 [2020-10-15 23:31:51,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:31:51,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:51,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:51,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:51,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:31:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:51,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:51,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:51,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023864729] [2020-10-15 23:31:51,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:51,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:51,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:51,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:51,788 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:51,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 141 transitions, 3010 flow. Second operand 11 states. [2020-10-15 23:31:51,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:51,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:51,788 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:52,075 INFO L129 PetriNetUnfolder]: 117/297 cut-off events. [2020-10-15 23:31:52,076 INFO L130 PetriNetUnfolder]: For 12049/12055 co-relation queries the response was YES. [2020-10-15 23:31:52,078 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3198 conditions, 297 events. 117/297 cut-off events. For 12049/12055 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 1663 event pairs, 0 based on Foata normal form. 8/305 useless extension candidates. Maximal degree in co-relation 3128. Up to 163 conditions per place. [2020-10-15 23:31:52,084 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 76 selfloop transitions, 70 changer transitions 0/153 dead transitions. [2020-10-15 23:31:52,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 153 transitions, 3657 flow [2020-10-15 23:31:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 23:31:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 23:31:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1089 transitions. [2020-10-15 23:31:52,087 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2020-10-15 23:31:52,087 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1089 transitions. [2020-10-15 23:31:52,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1089 transitions. [2020-10-15 23:31:52,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:52,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1089 transitions. [2020-10-15 23:31:52,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-15 23:31:52,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-15 23:31:52,091 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-15 23:31:52,091 INFO L185 Difference]: Start difference. First operand has 139 places, 141 transitions, 3010 flow. Second operand 15 states and 1089 transitions. [2020-10-15 23:31:52,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 153 transitions, 3657 flow [2020-10-15 23:31:52,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 153 transitions, 3624 flow, removed 1 selfloop flow, removed 5 redundant places. [2020-10-15 23:31:52,131 INFO L241 Difference]: Finished difference. Result has 151 places, 150 transitions, 3477 flow [2020-10-15 23:31:52,131 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3477, PETRI_PLACES=151, PETRI_TRANSITIONS=150} [2020-10-15 23:31:52,131 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 133 predicate places. [2020-10-15 23:31:52,132 INFO L481 AbstractCegarLoop]: Abstraction has has 151 places, 150 transitions, 3477 flow [2020-10-15 23:31:52,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:52,132 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:52,132 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:52,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-15 23:31:52,333 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash 26265932, now seen corresponding path program 12 times [2020-10-15 23:31:52,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:52,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222845475] [2020-10-15 23:31:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:52,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222845475] [2020-10-15 23:31:52,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288369648] [2020-10-15 23:31:52,417 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 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 [2020-10-15 23:31:52,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 23:31:52,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:52,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:52,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:52,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:52,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:52,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349312827] [2020-10-15 23:31:52,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:52,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:52,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:52,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:52,532 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:52,533 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 150 transitions, 3477 flow. Second operand 11 states. [2020-10-15 23:31:52,533 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:52,533 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:52,533 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:52,759 INFO L129 PetriNetUnfolder]: 118/299 cut-off events. [2020-10-15 23:31:52,759 INFO L130 PetriNetUnfolder]: For 13690/13696 co-relation queries the response was YES. [2020-10-15 23:31:52,761 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3426 conditions, 299 events. 118/299 cut-off events. For 13690/13696 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 1677 event pairs, 0 based on Foata normal form. 7/306 useless extension candidates. Maximal degree in co-relation 3353. Up to 171 conditions per place. [2020-10-15 23:31:52,767 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 105 selfloop transitions, 48 changer transitions 0/160 dead transitions. [2020-10-15 23:31:52,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 160 transitions, 3973 flow [2020-10-15 23:31:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 23:31:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-15 23:31:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 796 transitions. [2020-10-15 23:31:52,769 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6762956669498725 [2020-10-15 23:31:52,769 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 796 transitions. [2020-10-15 23:31:52,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 796 transitions. [2020-10-15 23:31:52,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:52,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 796 transitions. [2020-10-15 23:31:52,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-15 23:31:52,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-15 23:31:52,772 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-15 23:31:52,773 INFO L185 Difference]: Start difference. First operand has 151 places, 150 transitions, 3477 flow. Second operand 11 states and 796 transitions. [2020-10-15 23:31:52,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 160 transitions, 3973 flow [2020-10-15 23:31:52,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 160 transitions, 3734 flow, removed 84 selfloop flow, removed 11 redundant places. [2020-10-15 23:31:52,815 INFO L241 Difference]: Finished difference. Result has 152 places, 152 transitions, 3471 flow [2020-10-15 23:31:52,815 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3471, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2020-10-15 23:31:52,815 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 134 predicate places. [2020-10-15 23:31:52,815 INFO L481 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 3471 flow [2020-10-15 23:31:52,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:52,816 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:52,816 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:53,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 23:31:53,017 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:53,018 INFO L82 PathProgramCache]: Analyzing trace with hash 42143791, now seen corresponding path program 13 times [2020-10-15 23:31:53,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:53,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151727778] [2020-10-15 23:31:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:53,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151727778] [2020-10-15 23:31:53,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500110322] [2020-10-15 23:31:53,097 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 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 [2020-10-15 23:31:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:53,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:53,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:53,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:31:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:53,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:53,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:53,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368568605] [2020-10-15 23:31:53,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:53,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:53,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:53,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:53,192 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:53,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 3471 flow. Second operand 11 states. [2020-10-15 23:31:53,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:53,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:53,193 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:53,496 INFO L129 PetriNetUnfolder]: 125/318 cut-off events. [2020-10-15 23:31:53,496 INFO L130 PetriNetUnfolder]: For 15003/15009 co-relation queries the response was YES. [2020-10-15 23:31:53,497 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3657 conditions, 318 events. 125/318 cut-off events. For 15003/15009 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 1822 event pairs, 0 based on Foata normal form. 8/326 useless extension candidates. Maximal degree in co-relation 3582. Up to 183 conditions per place. [2020-10-15 23:31:53,501 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 90 selfloop transitions, 66 changer transitions 0/163 dead transitions. [2020-10-15 23:31:53,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 163 transitions, 4189 flow [2020-10-15 23:31:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:31:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:31:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1234 transitions. [2020-10-15 23:31:53,510 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783947223749313 [2020-10-15 23:31:53,510 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1234 transitions. [2020-10-15 23:31:53,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1234 transitions. [2020-10-15 23:31:53,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:53,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1234 transitions. [2020-10-15 23:31:53,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:31:53,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:31:53,514 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:31:53,514 INFO L185 Difference]: Start difference. First operand has 152 places, 152 transitions, 3471 flow. Second operand 17 states and 1234 transitions. [2020-10-15 23:31:53,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 163 transitions, 4189 flow [2020-10-15 23:31:53,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 163 transitions, 4128 flow, removed 1 selfloop flow, removed 8 redundant places. [2020-10-15 23:31:53,566 INFO L241 Difference]: Finished difference. Result has 163 places, 161 transitions, 3939 flow [2020-10-15 23:31:53,566 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3939, PETRI_PLACES=163, PETRI_TRANSITIONS=161} [2020-10-15 23:31:53,566 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 145 predicate places. [2020-10-15 23:31:53,566 INFO L481 AbstractCegarLoop]: Abstraction has has 163 places, 161 transitions, 3939 flow [2020-10-15 23:31:53,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:53,566 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:53,567 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:53,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 23:31:53,767 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:53,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:53,768 INFO L82 PathProgramCache]: Analyzing trace with hash 42122432, now seen corresponding path program 14 times [2020-10-15 23:31:53,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:53,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222043620] [2020-10-15 23:31:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:53,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222043620] [2020-10-15 23:31:53,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699763962] [2020-10-15 23:31:53,817 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 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 [2020-10-15 23:31:53,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:31:53,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:53,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:53,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:53,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:53,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:53,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548197817] [2020-10-15 23:31:53,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:53,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:53,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:53,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:53,932 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:53,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 161 transitions, 3939 flow. Second operand 11 states. [2020-10-15 23:31:53,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:53,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:53,933 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:54,206 INFO L129 PetriNetUnfolder]: 128/326 cut-off events. [2020-10-15 23:31:54,206 INFO L130 PetriNetUnfolder]: For 17276/17278 co-relation queries the response was YES. [2020-10-15 23:31:54,208 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3922 conditions, 326 events. 128/326 cut-off events. For 17276/17278 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 1883 event pairs, 0 based on Foata normal form. 3/329 useless extension candidates. Maximal degree in co-relation 3844. Up to 149 conditions per place. [2020-10-15 23:31:54,214 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 69 selfloop transitions, 97 changer transitions 0/173 dead transitions. [2020-10-15 23:31:54,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 173 transitions, 4520 flow [2020-10-15 23:31:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 23:31:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-15 23:31:54,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1015 transitions. [2020-10-15 23:31:54,219 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.677570093457944 [2020-10-15 23:31:54,219 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1015 transitions. [2020-10-15 23:31:54,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1015 transitions. [2020-10-15 23:31:54,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:54,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1015 transitions. [2020-10-15 23:31:54,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-15 23:31:54,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-15 23:31:54,223 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-15 23:31:54,224 INFO L185 Difference]: Start difference. First operand has 163 places, 161 transitions, 3939 flow. Second operand 14 states and 1015 transitions. [2020-10-15 23:31:54,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 173 transitions, 4520 flow [2020-10-15 23:31:54,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 173 transitions, 4238 flow, removed 101 selfloop flow, removed 12 redundant places. [2020-10-15 23:31:54,297 INFO L241 Difference]: Finished difference. Result has 165 places, 164 transitions, 4060 flow [2020-10-15 23:31:54,297 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4060, PETRI_PLACES=165, PETRI_TRANSITIONS=164} [2020-10-15 23:31:54,298 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 147 predicate places. [2020-10-15 23:31:54,298 INFO L481 AbstractCegarLoop]: Abstraction has has 165 places, 164 transitions, 4060 flow [2020-10-15 23:31:54,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:54,298 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:54,298 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:54,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-15 23:31:54,512 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:54,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:54,513 INFO L82 PathProgramCache]: Analyzing trace with hash 42144752, now seen corresponding path program 15 times [2020-10-15 23:31:54,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:54,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931579549] [2020-10-15 23:31:54,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:54,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931579549] [2020-10-15 23:31:54,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919109421] [2020-10-15 23:31:54,555 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 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 [2020-10-15 23:31:54,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 23:31:54,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:54,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 23:31:54,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:54,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:31:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:54,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:54,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:31:54,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134487106] [2020-10-15 23:31:54,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 23:31:54,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:54,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 23:31:54,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 23:31:54,655 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:54,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 164 transitions, 4060 flow. Second operand 11 states. [2020-10-15 23:31:54,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:54,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:54,656 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:55,131 INFO L129 PetriNetUnfolder]: 135/344 cut-off events. [2020-10-15 23:31:55,132 INFO L130 PetriNetUnfolder]: For 20091/20093 co-relation queries the response was YES. [2020-10-15 23:31:55,135 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4228 conditions, 344 events. 135/344 cut-off events. For 20091/20093 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2042 event pairs, 0 based on Foata normal form. 4/348 useless extension candidates. Maximal degree in co-relation 4148. Up to 133 conditions per place. [2020-10-15 23:31:55,141 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 41 selfloop transitions, 131 changer transitions 0/179 dead transitions. [2020-10-15 23:31:55,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 179 transitions, 4905 flow [2020-10-15 23:31:55,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 23:31:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-15 23:31:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1379 transitions. [2020-10-15 23:31:55,144 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783079193310378 [2020-10-15 23:31:55,144 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1379 transitions. [2020-10-15 23:31:55,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1379 transitions. [2020-10-15 23:31:55,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:55,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1379 transitions. [2020-10-15 23:31:55,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-15 23:31:55,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-15 23:31:55,149 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-15 23:31:55,149 INFO L185 Difference]: Start difference. First operand has 165 places, 164 transitions, 4060 flow. Second operand 19 states and 1379 transitions. [2020-10-15 23:31:55,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 179 transitions, 4905 flow [2020-10-15 23:31:55,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 179 transitions, 4744 flow, removed 17 selfloop flow, removed 14 redundant places. [2020-10-15 23:31:55,206 INFO L241 Difference]: Finished difference. Result has 172 places, 173 transitions, 4658 flow [2020-10-15 23:31:55,206 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4658, PETRI_PLACES=172, PETRI_TRANSITIONS=173} [2020-10-15 23:31:55,206 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 154 predicate places. [2020-10-15 23:31:55,206 INFO L481 AbstractCegarLoop]: Abstraction has has 172 places, 173 transitions, 4658 flow [2020-10-15 23:31:55,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 23:31:55,207 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:55,207 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:55,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 23:31:55,413 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:55,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1496144928, now seen corresponding path program 9 times [2020-10-15 23:31:55,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:55,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577348172] [2020-10-15 23:31:55,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:55,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577348172] [2020-10-15 23:31:55,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864371270] [2020-10-15 23:31:55,481 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 [2020-10-15 23:31:55,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 23:31:55,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:55,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:31:55,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:55,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:55,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:31:55,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591994296] [2020-10-15 23:31:55,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:31:55,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:55,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:31:55,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:31:55,643 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:55,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 173 transitions, 4658 flow. Second operand 13 states. [2020-10-15 23:31:55,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:55,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:55,646 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:55,830 INFO L129 PetriNetUnfolder]: 137/351 cut-off events. [2020-10-15 23:31:55,830 INFO L130 PetriNetUnfolder]: For 22807/22809 co-relation queries the response was YES. [2020-10-15 23:31:55,833 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4529 conditions, 351 events. 137/351 cut-off events. For 22807/22809 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2078 event pairs, 0 based on Foata normal form. 4/355 useless extension candidates. Maximal degree in co-relation 4451. Up to 219 conditions per place. [2020-10-15 23:31:55,839 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 142 selfloop transitions, 34 changer transitions 0/183 dead transitions. [2020-10-15 23:31:55,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 183 transitions, 5224 flow [2020-10-15 23:31:55,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 23:31:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-15 23:31:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 723 transitions. [2020-10-15 23:31:55,841 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757009345794392 [2020-10-15 23:31:55,841 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 723 transitions. [2020-10-15 23:31:55,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 723 transitions. [2020-10-15 23:31:55,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:55,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 723 transitions. [2020-10-15 23:31:55,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-15 23:31:55,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-15 23:31:55,844 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-15 23:31:55,844 INFO L185 Difference]: Start difference. First operand has 172 places, 173 transitions, 4658 flow. Second operand 10 states and 723 transitions. [2020-10-15 23:31:55,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 183 transitions, 5224 flow [2020-10-15 23:31:55,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 183 transitions, 4655 flow, removed 234 selfloop flow, removed 15 redundant places. [2020-10-15 23:31:55,902 INFO L241 Difference]: Finished difference. Result has 168 places, 175 transitions, 4297 flow [2020-10-15 23:31:55,902 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=4135, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4297, PETRI_PLACES=168, PETRI_TRANSITIONS=175} [2020-10-15 23:31:55,903 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 150 predicate places. [2020-10-15 23:31:55,903 INFO L481 AbstractCegarLoop]: Abstraction has has 168 places, 175 transitions, 4297 flow [2020-10-15 23:31:55,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:31:55,903 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:55,903 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:56,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:56,111 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:56,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:56,111 INFO L82 PathProgramCache]: Analyzing trace with hash 26475430, now seen corresponding path program 10 times [2020-10-15 23:31:56,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:56,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805993169] [2020-10-15 23:31:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:56,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805993169] [2020-10-15 23:31:56,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269788550] [2020-10-15 23:31:56,180 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 [2020-10-15 23:31:56,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:31:56,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:56,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:31:56,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:56,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:56,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:31:56,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502984042] [2020-10-15 23:31:56,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:31:56,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:56,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:31:56,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:31:56,344 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:56,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 175 transitions, 4297 flow. Second operand 13 states. [2020-10-15 23:31:56,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:56,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:56,346 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:56,620 INFO L129 PetriNetUnfolder]: 139/356 cut-off events. [2020-10-15 23:31:56,620 INFO L130 PetriNetUnfolder]: For 23713/23719 co-relation queries the response was YES. [2020-10-15 23:31:56,623 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4379 conditions, 356 events. 139/356 cut-off events. For 23713/23719 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2109 event pairs, 0 based on Foata normal form. 8/364 useless extension candidates. Maximal degree in co-relation 4302. Up to 204 conditions per place. [2020-10-15 23:31:56,630 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 125 selfloop transitions, 53 changer transitions 0/185 dead transitions. [2020-10-15 23:31:56,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 185 transitions, 4825 flow [2020-10-15 23:31:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 23:31:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-15 23:31:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 940 transitions. [2020-10-15 23:31:56,632 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757728253055356 [2020-10-15 23:31:56,632 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 940 transitions. [2020-10-15 23:31:56,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 940 transitions. [2020-10-15 23:31:56,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:56,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 940 transitions. [2020-10-15 23:31:56,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-15 23:31:56,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-15 23:31:56,636 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-15 23:31:56,637 INFO L185 Difference]: Start difference. First operand has 168 places, 175 transitions, 4297 flow. Second operand 13 states and 940 transitions. [2020-10-15 23:31:56,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 185 transitions, 4825 flow [2020-10-15 23:31:56,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 185 transitions, 4790 flow, removed 0 selfloop flow, removed 6 redundant places. [2020-10-15 23:31:56,728 INFO L241 Difference]: Finished difference. Result has 176 places, 177 transitions, 4482 flow [2020-10-15 23:31:56,728 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=4262, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4482, PETRI_PLACES=176, PETRI_TRANSITIONS=177} [2020-10-15 23:31:56,728 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 158 predicate places. [2020-10-15 23:31:56,729 INFO L481 AbstractCegarLoop]: Abstraction has has 176 places, 177 transitions, 4482 flow [2020-10-15 23:31:56,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:31:56,729 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:56,729 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:56,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:56,945 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:56,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:56,945 INFO L82 PathProgramCache]: Analyzing trace with hash 48616870, now seen corresponding path program 11 times [2020-10-15 23:31:56,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:56,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003569329] [2020-10-15 23:31:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:57,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003569329] [2020-10-15 23:31:57,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105403563] [2020-10-15 23:31:57,006 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 [2020-10-15 23:31:57,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 23:31:57,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:57,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:31:57,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:57,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:57,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:31:57,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167955367] [2020-10-15 23:31:57,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:31:57,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:57,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:31:57,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:31:57,140 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:57,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 177 transitions, 4482 flow. Second operand 13 states. [2020-10-15 23:31:57,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:57,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:57,141 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:57,421 INFO L129 PetriNetUnfolder]: 141/361 cut-off events. [2020-10-15 23:31:57,421 INFO L130 PetriNetUnfolder]: For 25323/25329 co-relation queries the response was YES. [2020-10-15 23:31:57,425 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4567 conditions, 361 events. 141/361 cut-off events. For 25323/25329 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2144 event pairs, 0 based on Foata normal form. 8/369 useless extension candidates. Maximal degree in co-relation 4488. Up to 195 conditions per place. [2020-10-15 23:31:57,437 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 112 selfloop transitions, 66 changer transitions 0/185 dead transitions. [2020-10-15 23:31:57,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 185 transitions, 4992 flow [2020-10-15 23:31:57,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 23:31:57,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-15 23:31:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 870 transitions. [2020-10-15 23:31:57,439 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.677570093457944 [2020-10-15 23:31:57,439 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 870 transitions. [2020-10-15 23:31:57,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 870 transitions. [2020-10-15 23:31:57,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:57,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 870 transitions. [2020-10-15 23:31:57,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-15 23:31:57,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-15 23:31:57,443 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-15 23:31:57,443 INFO L185 Difference]: Start difference. First operand has 176 places, 177 transitions, 4482 flow. Second operand 12 states and 870 transitions. [2020-10-15 23:31:57,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 185 transitions, 4992 flow [2020-10-15 23:31:57,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 185 transitions, 4911 flow, removed 6 selfloop flow, removed 11 redundant places. [2020-10-15 23:31:57,542 INFO L241 Difference]: Finished difference. Result has 177 places, 178 transitions, 4637 flow [2020-10-15 23:31:57,542 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=4403, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4637, PETRI_PLACES=177, PETRI_TRANSITIONS=178} [2020-10-15 23:31:57,543 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 159 predicate places. [2020-10-15 23:31:57,543 INFO L481 AbstractCegarLoop]: Abstraction has has 177 places, 178 transitions, 4637 flow [2020-10-15 23:31:57,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:31:57,543 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:57,543 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:57,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:57,757 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:57,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:57,758 INFO L82 PathProgramCache]: Analyzing trace with hash 48639190, now seen corresponding path program 12 times [2020-10-15 23:31:57,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:57,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048972287] [2020-10-15 23:31:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:57,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048972287] [2020-10-15 23:31:57,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060131658] [2020-10-15 23:31:57,814 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 [2020-10-15 23:31:57,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 23:31:57,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:57,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:31:57,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:57,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:31:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:57,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:57,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:31:57,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033311836] [2020-10-15 23:31:57,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:31:57,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:57,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:31:57,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:31:57,927 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:57,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 178 transitions, 4637 flow. Second operand 13 states. [2020-10-15 23:31:57,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:57,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:57,928 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:58,238 INFO L129 PetriNetUnfolder]: 145/371 cut-off events. [2020-10-15 23:31:58,238 INFO L130 PetriNetUnfolder]: For 26449/26451 co-relation queries the response was YES. [2020-10-15 23:31:58,241 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4801 conditions, 371 events. 145/371 cut-off events. For 26449/26451 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2227 event pairs, 0 based on Foata normal form. 4/375 useless extension candidates. Maximal degree in co-relation 4722. Up to 208 conditions per place. [2020-10-15 23:31:58,246 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 120 selfloop transitions, 65 changer transitions 0/192 dead transitions. [2020-10-15 23:31:58,246 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 192 transitions, 5560 flow [2020-10-15 23:31:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 23:31:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-15 23:31:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 944 transitions. [2020-10-15 23:31:58,248 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6786484543493889 [2020-10-15 23:31:58,248 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 944 transitions. [2020-10-15 23:31:58,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 944 transitions. [2020-10-15 23:31:58,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:58,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 944 transitions. [2020-10-15 23:31:58,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-15 23:31:58,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-15 23:31:58,251 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-15 23:31:58,252 INFO L185 Difference]: Start difference. First operand has 177 places, 178 transitions, 4637 flow. Second operand 13 states and 944 transitions. [2020-10-15 23:31:58,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 192 transitions, 5560 flow [2020-10-15 23:31:58,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 192 transitions, 5469 flow, removed 0 selfloop flow, removed 10 redundant places. [2020-10-15 23:31:58,322 INFO L241 Difference]: Finished difference. Result has 182 places, 187 transitions, 5206 flow [2020-10-15 23:31:58,322 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5206, PETRI_PLACES=182, PETRI_TRANSITIONS=187} [2020-10-15 23:31:58,322 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 164 predicate places. [2020-10-15 23:31:58,323 INFO L481 AbstractCegarLoop]: Abstraction has has 182 places, 187 transitions, 5206 flow [2020-10-15 23:31:58,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:31:58,323 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:58,323 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:58,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-15 23:31:58,524 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:58,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:58,524 INFO L82 PathProgramCache]: Analyzing trace with hash 724842712, now seen corresponding path program 16 times [2020-10-15 23:31:58,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:58,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751493738] [2020-10-15 23:31:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:58,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751493738] [2020-10-15 23:31:58,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632551334] [2020-10-15 23:31:58,585 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 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 [2020-10-15 23:31:58,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:31:58,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:58,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:31:58,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:58,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:31:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:58,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:58,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:31:58,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215275356] [2020-10-15 23:31:58,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:31:58,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:58,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:31:58,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:31:58,740 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:58,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 187 transitions, 5206 flow. Second operand 13 states. [2020-10-15 23:31:58,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:58,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:58,741 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:31:59,090 INFO L129 PetriNetUnfolder]: 149/381 cut-off events. [2020-10-15 23:31:59,091 INFO L130 PetriNetUnfolder]: For 30561/30567 co-relation queries the response was YES. [2020-10-15 23:31:59,095 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5158 conditions, 381 events. 149/381 cut-off events. For 30561/30567 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2311 event pairs, 0 based on Foata normal form. 8/389 useless extension candidates. Maximal degree in co-relation 5076. Up to 182 conditions per place. [2020-10-15 23:31:59,100 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 88 selfloop transitions, 104 changer transitions 0/199 dead transitions. [2020-10-15 23:31:59,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 199 transitions, 5996 flow [2020-10-15 23:31:59,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 23:31:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-15 23:31:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 944 transitions. [2020-10-15 23:31:59,103 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6786484543493889 [2020-10-15 23:31:59,103 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 944 transitions. [2020-10-15 23:31:59,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 944 transitions. [2020-10-15 23:31:59,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:31:59,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 944 transitions. [2020-10-15 23:31:59,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-15 23:31:59,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-15 23:31:59,106 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-15 23:31:59,107 INFO L185 Difference]: Start difference. First operand has 182 places, 187 transitions, 5206 flow. Second operand 13 states and 944 transitions. [2020-10-15 23:31:59,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 199 transitions, 5996 flow [2020-10-15 23:31:59,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 199 transitions, 5545 flow, removed 188 selfloop flow, removed 9 redundant places. [2020-10-15 23:31:59,217 INFO L241 Difference]: Finished difference. Result has 188 places, 193 transitions, 5372 flow [2020-10-15 23:31:59,217 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=4755, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5372, PETRI_PLACES=188, PETRI_TRANSITIONS=193} [2020-10-15 23:31:59,217 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 170 predicate places. [2020-10-15 23:31:59,217 INFO L481 AbstractCegarLoop]: Abstraction has has 188 places, 193 transitions, 5372 flow [2020-10-15 23:31:59,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:31:59,218 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:31:59,218 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:31:59,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:31:59,424 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:31:59,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:31:59,424 INFO L82 PathProgramCache]: Analyzing trace with hash 724841751, now seen corresponding path program 17 times [2020-10-15 23:31:59,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:31:59,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783637958] [2020-10-15 23:31:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:31:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:31:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:59,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783637958] [2020-10-15 23:31:59,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989573340] [2020-10-15 23:31:59,487 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 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 [2020-10-15 23:31:59,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:31:59,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:31:59,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:31:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:31:59,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:31:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:31:59,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:31:59,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:31:59,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244532043] [2020-10-15 23:31:59,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:31:59,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:31:59,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:31:59,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:31:59,677 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:31:59,677 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 193 transitions, 5372 flow. Second operand 13 states. [2020-10-15 23:31:59,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:31:59,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:31:59,678 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:00,136 INFO L129 PetriNetUnfolder]: 157/402 cut-off events. [2020-10-15 23:32:00,137 INFO L130 PetriNetUnfolder]: For 35240/35242 co-relation queries the response was YES. [2020-10-15 23:32:00,139 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5570 conditions, 402 events. 157/402 cut-off events. For 35240/35242 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2466 event pairs, 0 based on Foata normal form. 4/406 useless extension candidates. Maximal degree in co-relation 5485. Up to 205 conditions per place. [2020-10-15 23:32:00,142 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 89 selfloop transitions, 109 changer transitions 0/205 dead transitions. [2020-10-15 23:32:00,142 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 205 transitions, 6334 flow [2020-10-15 23:32:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:32:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:32:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1234 transitions. [2020-10-15 23:32:00,145 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783947223749313 [2020-10-15 23:32:00,145 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1234 transitions. [2020-10-15 23:32:00,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1234 transitions. [2020-10-15 23:32:00,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:00,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1234 transitions. [2020-10-15 23:32:00,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:32:00,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:32:00,149 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:32:00,149 INFO L185 Difference]: Start difference. First operand has 188 places, 193 transitions, 5372 flow. Second operand 17 states and 1234 transitions. [2020-10-15 23:32:00,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 205 transitions, 6334 flow [2020-10-15 23:32:00,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 205 transitions, 6028 flow, removed 101 selfloop flow, removed 9 redundant places. [2020-10-15 23:32:00,248 INFO L241 Difference]: Finished difference. Result has 198 places, 203 transitions, 5862 flow [2020-10-15 23:32:00,248 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=5070, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5862, PETRI_PLACES=198, PETRI_TRANSITIONS=203} [2020-10-15 23:32:00,248 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 180 predicate places. [2020-10-15 23:32:00,248 INFO L481 AbstractCegarLoop]: Abstraction has has 198 places, 203 transitions, 5862 flow [2020-10-15 23:32:00,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:00,248 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:00,248 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:00,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 23:32:00,463 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:00,463 INFO L82 PathProgramCache]: Analyzing trace with hash 714642441, now seen corresponding path program 18 times [2020-10-15 23:32:00,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:00,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399947248] [2020-10-15 23:32:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:00,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399947248] [2020-10-15 23:32:00,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566803299] [2020-10-15 23:32:00,561 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 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 [2020-10-15 23:32:00,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 23:32:00,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:00,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:00,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:00,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:00,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:32:00,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666722239] [2020-10-15 23:32:00,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:00,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:00,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:00,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:00,693 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:00,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 203 transitions, 5862 flow. Second operand 13 states. [2020-10-15 23:32:00,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:00,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:00,693 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:00,896 INFO L129 PetriNetUnfolder]: 158/404 cut-off events. [2020-10-15 23:32:00,896 INFO L130 PetriNetUnfolder]: For 37441/37447 co-relation queries the response was YES. [2020-10-15 23:32:00,901 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5777 conditions, 404 events. 158/404 cut-off events. For 37441/37447 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 2486 event pairs, 0 based on Foata normal form. 7/411 useless extension candidates. Maximal degree in co-relation 5689. Up to 241 conditions per place. [2020-10-15 23:32:00,906 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 152 selfloop transitions, 52 changer transitions 0/211 dead transitions. [2020-10-15 23:32:00,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 211 transitions, 6510 flow [2020-10-15 23:32:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 23:32:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-15 23:32:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 725 transitions. [2020-10-15 23:32:00,909 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.677570093457944 [2020-10-15 23:32:00,909 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 725 transitions. [2020-10-15 23:32:00,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 725 transitions. [2020-10-15 23:32:00,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:00,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 725 transitions. [2020-10-15 23:32:00,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-15 23:32:00,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-15 23:32:00,914 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-15 23:32:00,914 INFO L185 Difference]: Start difference. First operand has 198 places, 203 transitions, 5862 flow. Second operand 10 states and 725 transitions. [2020-10-15 23:32:00,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 211 transitions, 6510 flow [2020-10-15 23:32:01,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 211 transitions, 6142 flow, removed 133 selfloop flow, removed 13 redundant places. [2020-10-15 23:32:01,083 INFO L241 Difference]: Finished difference. Result has 196 places, 205 transitions, 5780 flow [2020-10-15 23:32:01,084 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=5553, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5780, PETRI_PLACES=196, PETRI_TRANSITIONS=205} [2020-10-15 23:32:01,084 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 178 predicate places. [2020-10-15 23:32:01,084 INFO L481 AbstractCegarLoop]: Abstraction has has 196 places, 205 transitions, 5780 flow [2020-10-15 23:32:01,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:01,084 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:01,084 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:01,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:01,299 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1483885949, now seen corresponding path program 19 times [2020-10-15 23:32:01,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:01,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947225917] [2020-10-15 23:32:01,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:01,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947225917] [2020-10-15 23:32:01,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632612419] [2020-10-15 23:32:01,358 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 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 [2020-10-15 23:32:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:01,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:01,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:01,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:32:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:01,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:01,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:32:01,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257717452] [2020-10-15 23:32:01,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:01,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:01,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:01,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:01,525 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:01,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 205 transitions, 5780 flow. Second operand 13 states. [2020-10-15 23:32:01,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:01,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:01,526 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:01,934 INFO L129 PetriNetUnfolder]: 163/419 cut-off events. [2020-10-15 23:32:01,934 INFO L130 PetriNetUnfolder]: For 37001/37003 co-relation queries the response was YES. [2020-10-15 23:32:01,937 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5808 conditions, 419 events. 163/419 cut-off events. For 37001/37003 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 2629 event pairs, 0 based on Foata normal form. 4/423 useless extension candidates. Maximal degree in co-relation 5718. Up to 223 conditions per place. [2020-10-15 23:32:01,940 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 119 selfloop transitions, 91 changer transitions 0/217 dead transitions. [2020-10-15 23:32:01,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 217 transitions, 6698 flow [2020-10-15 23:32:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 23:32:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-15 23:32:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 944 transitions. [2020-10-15 23:32:01,952 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6786484543493889 [2020-10-15 23:32:01,952 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 944 transitions. [2020-10-15 23:32:01,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 944 transitions. [2020-10-15 23:32:01,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:01,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 944 transitions. [2020-10-15 23:32:01,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-15 23:32:01,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-15 23:32:01,960 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-15 23:32:01,961 INFO L185 Difference]: Start difference. First operand has 196 places, 205 transitions, 5780 flow. Second operand 13 states and 944 transitions. [2020-10-15 23:32:01,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 217 transitions, 6698 flow [2020-10-15 23:32:02,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 217 transitions, 6626 flow, removed 0 selfloop flow, removed 8 redundant places. [2020-10-15 23:32:02,072 INFO L241 Difference]: Finished difference. Result has 203 places, 212 transitions, 6392 flow [2020-10-15 23:32:02,073 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=5709, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6392, PETRI_PLACES=203, PETRI_TRANSITIONS=212} [2020-10-15 23:32:02,073 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 185 predicate places. [2020-10-15 23:32:02,073 INFO L481 AbstractCegarLoop]: Abstraction has has 203 places, 212 transitions, 6392 flow [2020-10-15 23:32:02,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:02,073 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:02,073 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:02,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 23:32:02,279 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:02,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:02,279 INFO L82 PathProgramCache]: Analyzing trace with hash 149028777, now seen corresponding path program 20 times [2020-10-15 23:32:02,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:02,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654766569] [2020-10-15 23:32:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:02,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654766569] [2020-10-15 23:32:02,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461445961] [2020-10-15 23:32:02,347 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 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 [2020-10-15 23:32:02,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:02,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:02,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:02,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:02,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:02,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:32:02,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872117348] [2020-10-15 23:32:02,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:02,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:02,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:02,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:02,490 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:02,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 212 transitions, 6392 flow. Second operand 13 states. [2020-10-15 23:32:02,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:02,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:02,491 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:02,683 INFO L129 PetriNetUnfolder]: 166/428 cut-off events. [2020-10-15 23:32:02,683 INFO L130 PetriNetUnfolder]: For 41371/41377 co-relation queries the response was YES. [2020-10-15 23:32:02,687 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6200 conditions, 428 events. 166/428 cut-off events. For 41371/41377 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 2712 event pairs, 0 based on Foata normal form. 7/435 useless extension candidates. Maximal degree in co-relation 6107. Up to 250 conditions per place. [2020-10-15 23:32:02,693 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 161 selfloop transitions, 57 changer transitions 0/225 dead transitions. [2020-10-15 23:32:02,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 225 transitions, 7148 flow [2020-10-15 23:32:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 23:32:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-15 23:32:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 796 transitions. [2020-10-15 23:32:02,695 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6762956669498725 [2020-10-15 23:32:02,695 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 796 transitions. [2020-10-15 23:32:02,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 796 transitions. [2020-10-15 23:32:02,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:02,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 796 transitions. [2020-10-15 23:32:02,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-15 23:32:02,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-15 23:32:02,698 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-15 23:32:02,698 INFO L185 Difference]: Start difference. First operand has 203 places, 212 transitions, 6392 flow. Second operand 11 states and 796 transitions. [2020-10-15 23:32:02,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 225 transitions, 7148 flow [2020-10-15 23:32:02,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 225 transitions, 6915 flow, removed 94 selfloop flow, removed 8 redundant places. [2020-10-15 23:32:02,832 INFO L241 Difference]: Finished difference. Result has 208 places, 217 transitions, 6523 flow [2020-10-15 23:32:02,833 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=6160, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6523, PETRI_PLACES=208, PETRI_TRANSITIONS=217} [2020-10-15 23:32:02,833 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 190 predicate places. [2020-10-15 23:32:02,833 INFO L481 AbstractCegarLoop]: Abstraction has has 208 places, 217 transitions, 6523 flow [2020-10-15 23:32:02,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:02,833 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:02,833 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:03,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:03,034 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:03,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:03,035 INFO L82 PathProgramCache]: Analyzing trace with hash 453789746, now seen corresponding path program 21 times [2020-10-15 23:32:03,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:03,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962595522] [2020-10-15 23:32:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:03,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962595522] [2020-10-15 23:32:03,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268254492] [2020-10-15 23:32:03,114 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 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 [2020-10-15 23:32:03,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 23:32:03,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:03,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:03,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:03,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:03,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:32:03,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696235866] [2020-10-15 23:32:03,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:03,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:03,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:03,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:03,268 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:03,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 217 transitions, 6523 flow. Second operand 13 states. [2020-10-15 23:32:03,269 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:03,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:03,269 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:03,543 INFO L129 PetriNetUnfolder]: 169/436 cut-off events. [2020-10-15 23:32:03,543 INFO L130 PetriNetUnfolder]: For 43044/43050 co-relation queries the response was YES. [2020-10-15 23:32:03,548 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6353 conditions, 436 events. 169/436 cut-off events. For 43044/43050 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 2771 event pairs, 0 based on Foata normal form. 7/443 useless extension candidates. Maximal degree in co-relation 6256. Up to 250 conditions per place. [2020-10-15 23:32:03,555 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 160 selfloop transitions, 62 changer transitions 0/229 dead transitions. [2020-10-15 23:32:03,556 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 229 transitions, 7299 flow [2020-10-15 23:32:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 23:32:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-15 23:32:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 796 transitions. [2020-10-15 23:32:03,558 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6762956669498725 [2020-10-15 23:32:03,558 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 796 transitions. [2020-10-15 23:32:03,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 796 transitions. [2020-10-15 23:32:03,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:03,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 796 transitions. [2020-10-15 23:32:03,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-15 23:32:03,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-15 23:32:03,561 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-15 23:32:03,561 INFO L185 Difference]: Start difference. First operand has 208 places, 217 transitions, 6523 flow. Second operand 11 states and 796 transitions. [2020-10-15 23:32:03,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 229 transitions, 7299 flow [2020-10-15 23:32:03,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 229 transitions, 7226 flow, removed 10 selfloop flow, removed 6 redundant places. [2020-10-15 23:32:03,724 INFO L241 Difference]: Finished difference. Result has 215 places, 222 transitions, 6873 flow [2020-10-15 23:32:03,724 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=6454, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6873, PETRI_PLACES=215, PETRI_TRANSITIONS=222} [2020-10-15 23:32:03,725 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 197 predicate places. [2020-10-15 23:32:03,725 INFO L481 AbstractCegarLoop]: Abstraction has has 215 places, 222 transitions, 6873 flow [2020-10-15 23:32:03,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:03,725 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:03,725 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:03,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-15 23:32:03,926 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:03,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:03,926 INFO L82 PathProgramCache]: Analyzing trace with hash -438379848, now seen corresponding path program 22 times [2020-10-15 23:32:03,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:03,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368262387] [2020-10-15 23:32:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:03,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368262387] [2020-10-15 23:32:03,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80563255] [2020-10-15 23:32:03,985 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 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 [2020-10-15 23:32:04,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:32:04,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:04,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:04,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:04,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:32:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:04,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:04,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:32:04,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089686498] [2020-10-15 23:32:04,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:04,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:04,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:04,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:04,114 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:04,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 222 transitions, 6873 flow. Second operand 13 states. [2020-10-15 23:32:04,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:04,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:04,115 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:04,649 INFO L129 PetriNetUnfolder]: 178/458 cut-off events. [2020-10-15 23:32:04,649 INFO L130 PetriNetUnfolder]: For 47536/47542 co-relation queries the response was YES. [2020-10-15 23:32:04,653 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6828 conditions, 458 events. 178/458 cut-off events. For 47536/47542 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2947 event pairs, 0 based on Foata normal form. 9/467 useless extension candidates. Maximal degree in co-relation 6728. Up to 159 conditions per place. [2020-10-15 23:32:04,659 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 45 selfloop transitions, 188 changer transitions 0/240 dead transitions. [2020-10-15 23:32:04,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 240 transitions, 8216 flow [2020-10-15 23:32:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 23:32:04,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-15 23:32:04,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1525 transitions. [2020-10-15 23:32:04,662 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6786826880284824 [2020-10-15 23:32:04,662 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1525 transitions. [2020-10-15 23:32:04,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1525 transitions. [2020-10-15 23:32:04,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:04,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1525 transitions. [2020-10-15 23:32:04,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-15 23:32:04,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-15 23:32:04,667 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-15 23:32:04,667 INFO L185 Difference]: Start difference. First operand has 215 places, 222 transitions, 6873 flow. Second operand 21 states and 1525 transitions. [2020-10-15 23:32:04,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 240 transitions, 8216 flow [2020-10-15 23:32:04,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 240 transitions, 8152 flow, removed 0 selfloop flow, removed 7 redundant places. [2020-10-15 23:32:04,851 INFO L241 Difference]: Finished difference. Result has 231 places, 236 transitions, 8169 flow [2020-10-15 23:32:04,851 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=6811, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8169, PETRI_PLACES=231, PETRI_TRANSITIONS=236} [2020-10-15 23:32:04,851 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 213 predicate places. [2020-10-15 23:32:04,851 INFO L481 AbstractCegarLoop]: Abstraction has has 231 places, 236 transitions, 8169 flow [2020-10-15 23:32:04,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:04,852 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:04,852 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:05,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 23:32:05,053 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:05,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:05,053 INFO L82 PathProgramCache]: Analyzing trace with hash 475923715, now seen corresponding path program 23 times [2020-10-15 23:32:05,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:05,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568950294] [2020-10-15 23:32:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:05,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568950294] [2020-10-15 23:32:05,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552026482] [2020-10-15 23:32:05,109 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 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 [2020-10-15 23:32:05,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:05,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:05,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:05,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:05,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:32:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:05,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:05,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:32:05,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633235754] [2020-10-15 23:32:05,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:05,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:05,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:05,233 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:05,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 236 transitions, 8169 flow. Second operand 13 states. [2020-10-15 23:32:05,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:05,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:05,234 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:05,641 INFO L129 PetriNetUnfolder]: 186/480 cut-off events. [2020-10-15 23:32:05,641 INFO L130 PetriNetUnfolder]: For 52282/52288 co-relation queries the response was YES. [2020-10-15 23:32:05,644 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7630 conditions, 480 events. 186/480 cut-off events. For 52282/52288 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3134 event pairs, 0 based on Foata normal form. 8/488 useless extension candidates. Maximal degree in co-relation 7527. Up to 268 conditions per place. [2020-10-15 23:32:05,649 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 135 selfloop transitions, 107 changer transitions 0/249 dead transitions. [2020-10-15 23:32:05,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 249 transitions, 9413 flow [2020-10-15 23:32:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 23:32:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-15 23:32:05,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1379 transitions. [2020-10-15 23:32:05,651 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783079193310378 [2020-10-15 23:32:05,651 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1379 transitions. [2020-10-15 23:32:05,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1379 transitions. [2020-10-15 23:32:05,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:05,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1379 transitions. [2020-10-15 23:32:05,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-15 23:32:05,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-15 23:32:05,655 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-15 23:32:05,655 INFO L185 Difference]: Start difference. First operand has 231 places, 236 transitions, 8169 flow. Second operand 19 states and 1379 transitions. [2020-10-15 23:32:05,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 249 transitions, 9413 flow [2020-10-15 23:32:05,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 249 transitions, 8257 flow, removed 485 selfloop flow, removed 19 redundant places. [2020-10-15 23:32:05,834 INFO L241 Difference]: Finished difference. Result has 233 places, 247 transitions, 7984 flow [2020-10-15 23:32:05,835 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=7167, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7984, PETRI_PLACES=233, PETRI_TRANSITIONS=247} [2020-10-15 23:32:05,835 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 215 predicate places. [2020-10-15 23:32:05,835 INFO L481 AbstractCegarLoop]: Abstraction has has 233 places, 247 transitions, 7984 flow [2020-10-15 23:32:05,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:05,835 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:05,836 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:06,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 23:32:06,042 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:06,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:06,042 INFO L82 PathProgramCache]: Analyzing trace with hash 475953506, now seen corresponding path program 24 times [2020-10-15 23:32:06,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:06,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810672697] [2020-10-15 23:32:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:06,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810672697] [2020-10-15 23:32:06,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559319409] [2020-10-15 23:32:06,100 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 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 [2020-10-15 23:32:06,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 23:32:06,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:06,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:06,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:06,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:32:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:06,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:06,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:32:06,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416643748] [2020-10-15 23:32:06,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:06,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:06,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:06,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:06,234 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:06,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 247 transitions, 7984 flow. Second operand 13 states. [2020-10-15 23:32:06,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:06,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:06,235 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:06,722 INFO L129 PetriNetUnfolder]: 194/501 cut-off events. [2020-10-15 23:32:06,723 INFO L130 PetriNetUnfolder]: For 36804/36810 co-relation queries the response was YES. [2020-10-15 23:32:06,726 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6598 conditions, 501 events. 194/501 cut-off events. For 36804/36810 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3303 event pairs, 0 based on Foata normal form. 8/509 useless extension candidates. Maximal degree in co-relation 6499. Up to 236 conditions per place. [2020-10-15 23:32:06,731 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 99 selfloop transitions, 156 changer transitions 0/262 dead transitions. [2020-10-15 23:32:06,731 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 262 transitions, 9138 flow [2020-10-15 23:32:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 23:32:06,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-15 23:32:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1379 transitions. [2020-10-15 23:32:06,736 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783079193310378 [2020-10-15 23:32:06,736 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1379 transitions. [2020-10-15 23:32:06,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1379 transitions. [2020-10-15 23:32:06,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:06,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1379 transitions. [2020-10-15 23:32:06,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-15 23:32:06,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-15 23:32:06,740 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-15 23:32:06,741 INFO L185 Difference]: Start difference. First operand has 233 places, 247 transitions, 7984 flow. Second operand 19 states and 1379 transitions. [2020-10-15 23:32:06,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 262 transitions, 9138 flow [2020-10-15 23:32:06,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 262 transitions, 8871 flow, removed 99 selfloop flow, removed 11 redundant places. [2020-10-15 23:32:06,879 INFO L241 Difference]: Finished difference. Result has 243 places, 258 transitions, 8701 flow [2020-10-15 23:32:06,879 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=7717, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8701, PETRI_PLACES=243, PETRI_TRANSITIONS=258} [2020-10-15 23:32:06,879 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 225 predicate places. [2020-10-15 23:32:06,879 INFO L481 AbstractCegarLoop]: Abstraction has has 243 places, 258 transitions, 8701 flow [2020-10-15 23:32:06,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:06,880 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:06,880 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:07,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-15 23:32:07,080 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:07,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash -842350218, now seen corresponding path program 5 times [2020-10-15 23:32:07,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:07,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145459889] [2020-10-15 23:32:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:07,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145459889] [2020-10-15 23:32:07,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091616370] [2020-10-15 23:32:07,153 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 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 [2020-10-15 23:32:07,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 23:32:07,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:07,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:07,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:07,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:32:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:07,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:07,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 23:32:07,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490395743] [2020-10-15 23:32:07,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 23:32:07,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:07,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 23:32:07,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-15 23:32:07,322 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:07,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 258 transitions, 8701 flow. Second operand 16 states. [2020-10-15 23:32:07,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:07,322 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:07,322 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:07,558 INFO L129 PetriNetUnfolder]: 203/526 cut-off events. [2020-10-15 23:32:07,558 INFO L130 PetriNetUnfolder]: For 41269/41275 co-relation queries the response was YES. [2020-10-15 23:32:07,562 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7279 conditions, 526 events. 203/526 cut-off events. For 41269/41275 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 3526 event pairs, 0 based on Foata normal form. 8/534 useless extension candidates. Maximal degree in co-relation 7176. Up to 336 conditions per place. [2020-10-15 23:32:07,566 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 207 selfloop transitions, 58 changer transitions 0/272 dead transitions. [2020-10-15 23:32:07,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 272 transitions, 9977 flow [2020-10-15 23:32:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 23:32:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 23:32:07,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1089 transitions. [2020-10-15 23:32:07,568 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2020-10-15 23:32:07,568 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1089 transitions. [2020-10-15 23:32:07,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1089 transitions. [2020-10-15 23:32:07,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:07,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1089 transitions. [2020-10-15 23:32:07,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-15 23:32:07,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-15 23:32:07,570 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-15 23:32:07,570 INFO L185 Difference]: Start difference. First operand has 243 places, 258 transitions, 8701 flow. Second operand 15 states and 1089 transitions. [2020-10-15 23:32:07,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 272 transitions, 9977 flow [2020-10-15 23:32:07,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 272 transitions, 9585 flow, removed 117 selfloop flow, removed 14 redundant places. [2020-10-15 23:32:07,707 INFO L241 Difference]: Finished difference. Result has 246 places, 270 transitions, 9139 flow [2020-10-15 23:32:07,708 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=8327, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9139, PETRI_PLACES=246, PETRI_TRANSITIONS=270} [2020-10-15 23:32:07,708 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 228 predicate places. [2020-10-15 23:32:07,708 INFO L481 AbstractCegarLoop]: Abstraction has has 246 places, 270 transitions, 9139 flow [2020-10-15 23:32:07,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 23:32:07,708 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:07,708 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:07,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:07,916 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:07,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:07,916 INFO L82 PathProgramCache]: Analyzing trace with hash 863938345, now seen corresponding path program 25 times [2020-10-15 23:32:07,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:07,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879881930] [2020-10-15 23:32:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:07,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879881930] [2020-10-15 23:32:07,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109044684] [2020-10-15 23:32:07,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:08,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:08,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:08,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:08,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:32:08,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253046500] [2020-10-15 23:32:08,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:08,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:08,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:08,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:08,122 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:08,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 270 transitions, 9139 flow. Second operand 13 states. [2020-10-15 23:32:08,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:08,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:08,123 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:08,337 INFO L129 PetriNetUnfolder]: 204/529 cut-off events. [2020-10-15 23:32:08,338 INFO L130 PetriNetUnfolder]: For 40684/40690 co-relation queries the response was YES. [2020-10-15 23:32:08,342 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7265 conditions, 529 events. 204/529 cut-off events. For 40684/40690 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 3542 event pairs, 0 based on Foata normal form. 7/536 useless extension candidates. Maximal degree in co-relation 7158. Up to 338 conditions per place. [2020-10-15 23:32:08,346 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 236 selfloop transitions, 41 changer transitions 0/284 dead transitions. [2020-10-15 23:32:08,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 284 transitions, 10012 flow [2020-10-15 23:32:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 23:32:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-15 23:32:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 723 transitions. [2020-10-15 23:32:08,347 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757009345794392 [2020-10-15 23:32:08,347 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 723 transitions. [2020-10-15 23:32:08,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 723 transitions. [2020-10-15 23:32:08,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:08,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 723 transitions. [2020-10-15 23:32:08,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-15 23:32:08,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-15 23:32:08,350 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-15 23:32:08,350 INFO L185 Difference]: Start difference. First operand has 246 places, 270 transitions, 9139 flow. Second operand 10 states and 723 transitions. [2020-10-15 23:32:08,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 284 transitions, 10012 flow [2020-10-15 23:32:08,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 284 transitions, 9706 flow, removed 122 selfloop flow, removed 10 redundant places. [2020-10-15 23:32:08,528 INFO L241 Difference]: Finished difference. Result has 248 places, 273 transitions, 9093 flow [2020-10-15 23:32:08,528 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=8862, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9093, PETRI_PLACES=248, PETRI_TRANSITIONS=273} [2020-10-15 23:32:08,528 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 230 predicate places. [2020-10-15 23:32:08,528 INFO L481 AbstractCegarLoop]: Abstraction has has 248 places, 273 transitions, 9093 flow [2020-10-15 23:32:08,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:08,529 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:08,529 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:08,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-10-15 23:32:08,735 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:08,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:08,735 INFO L82 PathProgramCache]: Analyzing trace with hash 857653405, now seen corresponding path program 26 times [2020-10-15 23:32:08,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:08,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726217949] [2020-10-15 23:32:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:08,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726217949] [2020-10-15 23:32:08,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949162805] [2020-10-15 23:32:08,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:08,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:08,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:08,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:08,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:08,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:08,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:32:08,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880336450] [2020-10-15 23:32:08,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:08,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:08,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:08,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:08,930 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:08,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 273 transitions, 9093 flow. Second operand 13 states. [2020-10-15 23:32:08,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:08,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:08,931 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:09,208 INFO L129 PetriNetUnfolder]: 210/547 cut-off events. [2020-10-15 23:32:09,208 INFO L130 PetriNetUnfolder]: For 41272/41278 co-relation queries the response was YES. [2020-10-15 23:32:09,213 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7288 conditions, 547 events. 210/547 cut-off events. For 41272/41278 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 3739 event pairs, 0 based on Foata normal form. 7/554 useless extension candidates. Maximal degree in co-relation 7177. Up to 339 conditions per place. [2020-10-15 23:32:09,217 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 235 selfloop transitions, 52 changer transitions 0/294 dead transitions. [2020-10-15 23:32:09,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 294 transitions, 10266 flow [2020-10-15 23:32:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 23:32:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-15 23:32:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 867 transitions. [2020-10-15 23:32:09,218 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752336448598131 [2020-10-15 23:32:09,218 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 867 transitions. [2020-10-15 23:32:09,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 867 transitions. [2020-10-15 23:32:09,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:09,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 867 transitions. [2020-10-15 23:32:09,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-15 23:32:09,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-15 23:32:09,222 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-15 23:32:09,222 INFO L185 Difference]: Start difference. First operand has 248 places, 273 transitions, 9093 flow. Second operand 12 states and 867 transitions. [2020-10-15 23:32:09,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 294 transitions, 10266 flow [2020-10-15 23:32:09,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 294 transitions, 10219 flow, removed 4 selfloop flow, removed 5 redundant places. [2020-10-15 23:32:09,374 INFO L241 Difference]: Finished difference. Result has 257 places, 282 transitions, 9625 flow [2020-10-15 23:32:09,374 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=9047, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9625, PETRI_PLACES=257, PETRI_TRANSITIONS=282} [2020-10-15 23:32:09,374 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 239 predicate places. [2020-10-15 23:32:09,375 INFO L481 AbstractCegarLoop]: Abstraction has has 257 places, 282 transitions, 9625 flow [2020-10-15 23:32:09,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:09,375 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:09,375 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:09,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 23:32:09,582 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:09,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:09,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1305795747, now seen corresponding path program 27 times [2020-10-15 23:32:09,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:09,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291755362] [2020-10-15 23:32:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:09,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291755362] [2020-10-15 23:32:09,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246204569] [2020-10-15 23:32:09,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:09,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 23:32:09,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:09,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:09,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:09,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:09,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:32:09,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635195560] [2020-10-15 23:32:09,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:09,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:09,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:09,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:09,778 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:09,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 282 transitions, 9625 flow. Second operand 13 states. [2020-10-15 23:32:09,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:09,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:09,778 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:10,229 INFO L129 PetriNetUnfolder]: 217/566 cut-off events. [2020-10-15 23:32:10,229 INFO L130 PetriNetUnfolder]: For 45093/45095 co-relation queries the response was YES. [2020-10-15 23:32:10,234 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7636 conditions, 566 events. 217/566 cut-off events. For 45093/45095 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 3854 event pairs, 0 based on Foata normal form. 3/569 useless extension candidates. Maximal degree in co-relation 7522. Up to 276 conditions per place. [2020-10-15 23:32:10,238 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 159 selfloop transitions, 139 changer transitions 0/305 dead transitions. [2020-10-15 23:32:10,238 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 305 transitions, 10800 flow [2020-10-15 23:32:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 23:32:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-15 23:32:10,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1375 transitions. [2020-10-15 23:32:10,240 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676340383669454 [2020-10-15 23:32:10,240 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1375 transitions. [2020-10-15 23:32:10,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1375 transitions. [2020-10-15 23:32:10,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:10,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1375 transitions. [2020-10-15 23:32:10,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-15 23:32:10,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-15 23:32:10,244 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-15 23:32:10,244 INFO L185 Difference]: Start difference. First operand has 257 places, 282 transitions, 9625 flow. Second operand 19 states and 1375 transitions. [2020-10-15 23:32:10,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 305 transitions, 10800 flow [2020-10-15 23:32:10,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 305 transitions, 10742 flow, removed 0 selfloop flow, removed 8 redundant places. [2020-10-15 23:32:10,397 INFO L241 Difference]: Finished difference. Result has 271 places, 294 transitions, 10418 flow [2020-10-15 23:32:10,397 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=9567, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10418, PETRI_PLACES=271, PETRI_TRANSITIONS=294} [2020-10-15 23:32:10,397 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 253 predicate places. [2020-10-15 23:32:10,398 INFO L481 AbstractCegarLoop]: Abstraction has has 271 places, 294 transitions, 10418 flow [2020-10-15 23:32:10,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:10,398 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:10,398 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:10,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:10,606 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:10,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:10,606 INFO L82 PathProgramCache]: Analyzing trace with hash 426228201, now seen corresponding path program 28 times [2020-10-15 23:32:10,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:10,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287484204] [2020-10-15 23:32:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:10,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287484204] [2020-10-15 23:32:10,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656831047] [2020-10-15 23:32:10,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:10,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:32:10,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:10,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:10,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:10,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:32:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:10,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:10,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:32:10,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78895235] [2020-10-15 23:32:10,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:10,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:10,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:10,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:10,784 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:10,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 294 transitions, 10418 flow. Second operand 13 states. [2020-10-15 23:32:10,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:10,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:10,785 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:11,450 INFO L129 PetriNetUnfolder]: 225/587 cut-off events. [2020-10-15 23:32:11,450 INFO L130 PetriNetUnfolder]: For 52714/52720 co-relation queries the response was YES. [2020-10-15 23:32:11,459 INFO L80 FinitePrefix]: Finished finitePrefix Result has 8316 conditions, 587 events. 225/587 cut-off events. For 52714/52720 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 4096 event pairs, 0 based on Foata normal form. 8/595 useless extension candidates. Maximal degree in co-relation 8198. Up to 233 conditions per place. [2020-10-15 23:32:11,467 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 101 selfloop transitions, 204 changer transitions 0/312 dead transitions. [2020-10-15 23:32:11,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 312 transitions, 11847 flow [2020-10-15 23:32:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 23:32:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-15 23:32:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1814 transitions. [2020-10-15 23:32:11,470 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6781308411214954 [2020-10-15 23:32:11,470 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1814 transitions. [2020-10-15 23:32:11,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1814 transitions. [2020-10-15 23:32:11,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:11,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1814 transitions. [2020-10-15 23:32:11,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-15 23:32:11,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-15 23:32:11,475 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-15 23:32:11,475 INFO L185 Difference]: Start difference. First operand has 271 places, 294 transitions, 10418 flow. Second operand 25 states and 1814 transitions. [2020-10-15 23:32:11,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 312 transitions, 11847 flow [2020-10-15 23:32:11,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 312 transitions, 11663 flow, removed 10 selfloop flow, removed 15 redundant places. [2020-10-15 23:32:11,690 INFO L241 Difference]: Finished difference. Result has 283 places, 304 transitions, 11455 flow [2020-10-15 23:32:11,691 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=10237, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11455, PETRI_PLACES=283, PETRI_TRANSITIONS=304} [2020-10-15 23:32:11,691 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 265 predicate places. [2020-10-15 23:32:11,691 INFO L481 AbstractCegarLoop]: Abstraction has has 283 places, 304 transitions, 11455 flow [2020-10-15 23:32:11,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:11,691 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:11,691 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:11,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 23:32:11,892 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:11,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1306509026, now seen corresponding path program 29 times [2020-10-15 23:32:11,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:11,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568231130] [2020-10-15 23:32:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:11,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568231130] [2020-10-15 23:32:11,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182314230] [2020-10-15 23:32:11,949 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 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 [2020-10-15 23:32:12,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:12,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:12,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:12,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:12,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:32:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:12,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:12,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:32:12,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395745029] [2020-10-15 23:32:12,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:12,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:12,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:12,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:12,115 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:12,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 304 transitions, 11455 flow. Second operand 13 states. [2020-10-15 23:32:12,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:12,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:12,116 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:12,741 INFO L129 PetriNetUnfolder]: 248/651 cut-off events. [2020-10-15 23:32:12,742 INFO L130 PetriNetUnfolder]: For 66518/66520 co-relation queries the response was YES. [2020-10-15 23:32:12,747 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9675 conditions, 651 events. 248/651 cut-off events. For 66518/66520 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 4630 event pairs, 0 based on Foata normal form. 5/656 useless extension candidates. Maximal degree in co-relation 9555. Up to 277 conditions per place. [2020-10-15 23:32:12,752 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 91 selfloop transitions, 238 changer transitions 0/336 dead transitions. [2020-10-15 23:32:12,753 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 336 transitions, 13823 flow [2020-10-15 23:32:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 23:32:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-15 23:32:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1815 transitions. [2020-10-15 23:32:12,754 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2020-10-15 23:32:12,755 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1815 transitions. [2020-10-15 23:32:12,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1815 transitions. [2020-10-15 23:32:12,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:12,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1815 transitions. [2020-10-15 23:32:12,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-15 23:32:12,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-15 23:32:12,758 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-15 23:32:12,758 INFO L185 Difference]: Start difference. First operand has 283 places, 304 transitions, 11455 flow. Second operand 25 states and 1815 transitions. [2020-10-15 23:32:12,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 336 transitions, 13823 flow [2020-10-15 23:32:13,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 336 transitions, 13025 flow, removed 270 selfloop flow, removed 20 redundant places. [2020-10-15 23:32:13,047 INFO L241 Difference]: Finished difference. Result has 290 places, 334 transitions, 12969 flow [2020-10-15 23:32:13,049 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=10671, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12969, PETRI_PLACES=290, PETRI_TRANSITIONS=334} [2020-10-15 23:32:13,049 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 272 predicate places. [2020-10-15 23:32:13,049 INFO L481 AbstractCegarLoop]: Abstraction has has 290 places, 334 transitions, 12969 flow [2020-10-15 23:32:13,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:13,049 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:13,049 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:13,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:13,262 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:13,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:13,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1306480196, now seen corresponding path program 30 times [2020-10-15 23:32:13,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:13,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873683520] [2020-10-15 23:32:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:13,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873683520] [2020-10-15 23:32:13,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899457628] [2020-10-15 23:32:13,321 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 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 [2020-10-15 23:32:13,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 23:32:13,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:13,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 23:32:13,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:13,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:32:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:13,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:13,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 23:32:13,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646071750] [2020-10-15 23:32:13,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 23:32:13,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:13,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 23:32:13,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 23:32:13,468 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:13,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 334 transitions, 12969 flow. Second operand 13 states. [2020-10-15 23:32:13,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:13,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:13,468 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:14,199 INFO L129 PetriNetUnfolder]: 258/677 cut-off events. [2020-10-15 23:32:14,199 INFO L130 PetriNetUnfolder]: For 70784/70790 co-relation queries the response was YES. [2020-10-15 23:32:14,208 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10341 conditions, 677 events. 258/677 cut-off events. For 70784/70790 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 4880 event pairs, 0 based on Foata normal form. 9/686 useless extension candidates. Maximal degree in co-relation 10220. Up to 288 conditions per place. [2020-10-15 23:32:14,216 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 125 selfloop transitions, 224 changer transitions 0/356 dead transitions. [2020-10-15 23:32:14,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 356 transitions, 14837 flow [2020-10-15 23:32:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 23:32:14,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-15 23:32:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1815 transitions. [2020-10-15 23:32:14,218 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2020-10-15 23:32:14,218 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1815 transitions. [2020-10-15 23:32:14,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1815 transitions. [2020-10-15 23:32:14,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:14,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1815 transitions. [2020-10-15 23:32:14,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-15 23:32:14,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-15 23:32:14,221 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-15 23:32:14,221 INFO L185 Difference]: Start difference. First operand has 290 places, 334 transitions, 12969 flow. Second operand 25 states and 1815 transitions. [2020-10-15 23:32:14,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 356 transitions, 14837 flow [2020-10-15 23:32:14,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 356 transitions, 13937 flow, removed 344 selfloop flow, removed 22 redundant places. [2020-10-15 23:32:14,516 INFO L241 Difference]: Finished difference. Result has 295 places, 349 transitions, 13768 flow [2020-10-15 23:32:14,517 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=12204, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13768, PETRI_PLACES=295, PETRI_TRANSITIONS=349} [2020-10-15 23:32:14,517 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 277 predicate places. [2020-10-15 23:32:14,517 INFO L481 AbstractCegarLoop]: Abstraction has has 295 places, 349 transitions, 13768 flow [2020-10-15 23:32:14,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 23:32:14,518 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:14,518 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:14,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-15 23:32:14,732 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:14,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:14,733 INFO L82 PathProgramCache]: Analyzing trace with hash 864147843, now seen corresponding path program 13 times [2020-10-15 23:32:14,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:14,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799830702] [2020-10-15 23:32:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:14,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799830702] [2020-10-15 23:32:14,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264108894] [2020-10-15 23:32:14,804 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 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 [2020-10-15 23:32:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:14,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:14,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:14,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:14,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:14,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387105596] [2020-10-15 23:32:14,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:14,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:14,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:14,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:14,950 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:14,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 349 transitions, 13768 flow. Second operand 15 states. [2020-10-15 23:32:14,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:14,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:14,951 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:15,260 INFO L129 PetriNetUnfolder]: 260/683 cut-off events. [2020-10-15 23:32:15,260 INFO L130 PetriNetUnfolder]: For 68409/68411 co-relation queries the response was YES. [2020-10-15 23:32:15,266 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10199 conditions, 683 events. 260/683 cut-off events. For 68409/68411 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 4914 event pairs, 0 based on Foata normal form. 4/687 useless extension candidates. Maximal degree in co-relation 10079. Up to 441 conditions per place. [2020-10-15 23:32:15,271 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 310 selfloop transitions, 44 changer transitions 0/361 dead transitions. [2020-10-15 23:32:15,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 361 transitions, 14765 flow [2020-10-15 23:32:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 23:32:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-15 23:32:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 795 transitions. [2020-10-15 23:32:15,273 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675446049277825 [2020-10-15 23:32:15,273 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 795 transitions. [2020-10-15 23:32:15,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 795 transitions. [2020-10-15 23:32:15,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:15,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 795 transitions. [2020-10-15 23:32:15,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-15 23:32:15,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-15 23:32:15,274 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-15 23:32:15,274 INFO L185 Difference]: Start difference. First operand has 295 places, 349 transitions, 13768 flow. Second operand 11 states and 795 transitions. [2020-10-15 23:32:15,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 361 transitions, 14765 flow [2020-10-15 23:32:15,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 361 transitions, 13981 flow, removed 277 selfloop flow, removed 24 redundant places. [2020-10-15 23:32:15,534 INFO L241 Difference]: Finished difference. Result has 283 places, 351 transitions, 13216 flow [2020-10-15 23:32:15,535 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=12989, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13216, PETRI_PLACES=283, PETRI_TRANSITIONS=351} [2020-10-15 23:32:15,535 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 265 predicate places. [2020-10-15 23:32:15,536 INFO L481 AbstractCegarLoop]: Abstraction has has 283 places, 351 transitions, 13216 flow [2020-10-15 23:32:15,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:15,536 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:15,536 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:15,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 23:32:15,752 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:15,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1485673805, now seen corresponding path program 14 times [2020-10-15 23:32:15,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:15,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513008353] [2020-10-15 23:32:15,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:15,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513008353] [2020-10-15 23:32:15,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600106301] [2020-10-15 23:32:15,820 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 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 [2020-10-15 23:32:15,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:15,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:15,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:15,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:16,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:16,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:16,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727942434] [2020-10-15 23:32:16,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:16,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:16,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:16,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:16,044 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:16,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 351 transitions, 13216 flow. Second operand 15 states. [2020-10-15 23:32:16,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:16,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:16,045 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:16,636 INFO L129 PetriNetUnfolder]: 262/689 cut-off events. [2020-10-15 23:32:16,636 INFO L130 PetriNetUnfolder]: For 66270/66276 co-relation queries the response was YES. [2020-10-15 23:32:16,645 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9923 conditions, 689 events. 262/689 cut-off events. For 66270/66276 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 4973 event pairs, 0 based on Foata normal form. 8/697 useless extension candidates. Maximal degree in co-relation 9803. Up to 405 conditions per place. [2020-10-15 23:32:16,688 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 275 selfloop transitions, 84 changer transitions 0/366 dead transitions. [2020-10-15 23:32:16,688 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 366 transitions, 14281 flow [2020-10-15 23:32:16,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:32:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:32:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1229 transitions. [2020-10-15 23:32:16,695 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6756459593183067 [2020-10-15 23:32:16,695 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1229 transitions. [2020-10-15 23:32:16,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1229 transitions. [2020-10-15 23:32:16,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:16,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1229 transitions. [2020-10-15 23:32:16,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:32:16,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:32:16,698 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:32:16,698 INFO L185 Difference]: Start difference. First operand has 283 places, 351 transitions, 13216 flow. Second operand 17 states and 1229 transitions. [2020-10-15 23:32:16,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 366 transitions, 14281 flow [2020-10-15 23:32:16,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 366 transitions, 14224 flow, removed 1 selfloop flow, removed 9 redundant places. [2020-10-15 23:32:16,912 INFO L241 Difference]: Finished difference. Result has 292 places, 353 transitions, 13503 flow [2020-10-15 23:32:16,912 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=13159, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=13503, PETRI_PLACES=292, PETRI_TRANSITIONS=353} [2020-10-15 23:32:16,913 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 274 predicate places. [2020-10-15 23:32:16,913 INFO L481 AbstractCegarLoop]: Abstraction has has 292 places, 353 transitions, 13503 flow [2020-10-15 23:32:16,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:16,913 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:16,913 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:17,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 23:32:17,114 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:17,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1507123325, now seen corresponding path program 15 times [2020-10-15 23:32:17,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:17,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015336988] [2020-10-15 23:32:17,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:17,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015336988] [2020-10-15 23:32:17,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036702712] [2020-10-15 23:32:17,180 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 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 [2020-10-15 23:32:17,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 23:32:17,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:17,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:17,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:17,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:17,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:17,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150137395] [2020-10-15 23:32:17,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:17,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:17,337 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:17,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 353 transitions, 13503 flow. Second operand 15 states. [2020-10-15 23:32:17,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:17,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:17,337 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:17,790 INFO L129 PetriNetUnfolder]: 264/694 cut-off events. [2020-10-15 23:32:17,790 INFO L130 PetriNetUnfolder]: For 69756/69758 co-relation queries the response was YES. [2020-10-15 23:32:17,796 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10178 conditions, 694 events. 264/694 cut-off events. For 69756/69758 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 5004 event pairs, 0 based on Foata normal form. 4/698 useless extension candidates. Maximal degree in co-relation 10056. Up to 398 conditions per place. [2020-10-15 23:32:17,801 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 266 selfloop transitions, 95 changer transitions 0/368 dead transitions. [2020-10-15 23:32:17,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 368 transitions, 14576 flow [2020-10-15 23:32:17,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:32:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:32:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1230 transitions. [2020-10-15 23:32:17,803 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6761957119296317 [2020-10-15 23:32:17,803 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1230 transitions. [2020-10-15 23:32:17,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1230 transitions. [2020-10-15 23:32:17,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:17,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1230 transitions. [2020-10-15 23:32:17,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:32:17,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:32:17,805 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:32:17,805 INFO L185 Difference]: Start difference. First operand has 292 places, 353 transitions, 13503 flow. Second operand 17 states and 1230 transitions. [2020-10-15 23:32:17,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 368 transitions, 14576 flow [2020-10-15 23:32:18,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 368 transitions, 14462 flow, removed 6 selfloop flow, removed 13 redundant places. [2020-10-15 23:32:18,031 INFO L241 Difference]: Finished difference. Result has 297 places, 355 transitions, 13769 flow [2020-10-15 23:32:18,031 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=13393, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=13769, PETRI_PLACES=297, PETRI_TRANSITIONS=355} [2020-10-15 23:32:18,032 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 279 predicate places. [2020-10-15 23:32:18,032 INFO L481 AbstractCegarLoop]: Abstraction has has 297 places, 355 transitions, 13769 flow [2020-10-15 23:32:18,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:18,032 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:18,032 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:18,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-15 23:32:18,244 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:18,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1507837565, now seen corresponding path program 16 times [2020-10-15 23:32:18,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:18,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802522583] [2020-10-15 23:32:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:18,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802522583] [2020-10-15 23:32:18,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378346283] [2020-10-15 23:32:18,317 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 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 [2020-10-15 23:32:18,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:32:18,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:18,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:18,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:18,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:32:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:18,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:18,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:18,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762390660] [2020-10-15 23:32:18,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:18,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:18,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:18,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:18,446 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:18,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 355 transitions, 13769 flow. Second operand 15 states. [2020-10-15 23:32:18,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:18,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:18,447 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:18,937 INFO L129 PetriNetUnfolder]: 268/704 cut-off events. [2020-10-15 23:32:18,937 INFO L130 PetriNetUnfolder]: For 71486/71492 co-relation queries the response was YES. [2020-10-15 23:32:18,943 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10489 conditions, 704 events. 268/704 cut-off events. For 71486/71492 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 5109 event pairs, 0 based on Foata normal form. 8/712 useless extension candidates. Maximal degree in co-relation 10365. Up to 413 conditions per place. [2020-10-15 23:32:18,948 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 272 selfloop transitions, 93 changer transitions 0/372 dead transitions. [2020-10-15 23:32:18,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 372 transitions, 15332 flow [2020-10-15 23:32:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 23:32:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 23:32:18,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1089 transitions. [2020-10-15 23:32:18,950 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2020-10-15 23:32:18,950 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1089 transitions. [2020-10-15 23:32:18,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1089 transitions. [2020-10-15 23:32:18,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:18,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1089 transitions. [2020-10-15 23:32:18,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-15 23:32:18,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-15 23:32:18,953 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-15 23:32:18,953 INFO L185 Difference]: Start difference. First operand has 297 places, 355 transitions, 13769 flow. Second operand 15 states and 1089 transitions. [2020-10-15 23:32:18,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 372 transitions, 15332 flow [2020-10-15 23:32:19,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 372 transitions, 15185 flow, removed 9 selfloop flow, removed 15 redundant places. [2020-10-15 23:32:19,233 INFO L241 Difference]: Finished difference. Result has 299 places, 364 transitions, 14557 flow [2020-10-15 23:32:19,234 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=13631, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14557, PETRI_PLACES=299, PETRI_TRANSITIONS=364} [2020-10-15 23:32:19,234 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 281 predicate places. [2020-10-15 23:32:19,234 INFO L481 AbstractCegarLoop]: Abstraction has has 299 places, 364 transitions, 14557 flow [2020-10-15 23:32:19,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:19,234 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:19,234 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:19,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:19,448 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:19,448 INFO L82 PathProgramCache]: Analyzing trace with hash 324894394, now seen corresponding path program 31 times [2020-10-15 23:32:19,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:19,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289020765] [2020-10-15 23:32:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:19,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289020765] [2020-10-15 23:32:19,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140134122] [2020-10-15 23:32:19,526 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 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 [2020-10-15 23:32:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:19,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:19,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:19,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:19,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:19,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466393122] [2020-10-15 23:32:19,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:19,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:19,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:19,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:19,688 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:19,689 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 364 transitions, 14557 flow. Second operand 15 states. [2020-10-15 23:32:19,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:19,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:19,689 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:20,039 INFO L129 PetriNetUnfolder]: 269/706 cut-off events. [2020-10-15 23:32:20,040 INFO L130 PetriNetUnfolder]: For 72989/72991 co-relation queries the response was YES. [2020-10-15 23:32:20,046 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10677 conditions, 706 events. 269/706 cut-off events. For 72989/72991 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 5113 event pairs, 0 based on Foata normal form. 3/709 useless extension candidates. Maximal degree in co-relation 10551. Up to 411 conditions per place. [2020-10-15 23:32:20,052 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 284 selfloop transitions, 89 changer transitions 0/380 dead transitions. [2020-10-15 23:32:20,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 380 transitions, 15622 flow [2020-10-15 23:32:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 23:32:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-15 23:32:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 940 transitions. [2020-10-15 23:32:20,053 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757728253055356 [2020-10-15 23:32:20,053 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 940 transitions. [2020-10-15 23:32:20,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 940 transitions. [2020-10-15 23:32:20,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:20,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 940 transitions. [2020-10-15 23:32:20,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-15 23:32:20,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-15 23:32:20,055 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-15 23:32:20,055 INFO L185 Difference]: Start difference. First operand has 299 places, 364 transitions, 14557 flow. Second operand 13 states and 940 transitions. [2020-10-15 23:32:20,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 380 transitions, 15622 flow [2020-10-15 23:32:20,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 380 transitions, 14972 flow, removed 268 selfloop flow, removed 11 redundant places. [2020-10-15 23:32:20,304 INFO L241 Difference]: Finished difference. Result has 303 places, 367 transitions, 14298 flow [2020-10-15 23:32:20,305 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=13907, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14298, PETRI_PLACES=303, PETRI_TRANSITIONS=367} [2020-10-15 23:32:20,305 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 285 predicate places. [2020-10-15 23:32:20,305 INFO L481 AbstractCegarLoop]: Abstraction has has 303 places, 367 transitions, 14298 flow [2020-10-15 23:32:20,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:20,305 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:20,305 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:20,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-10-15 23:32:20,506 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:20,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:20,506 INFO L82 PathProgramCache]: Analyzing trace with hash 324895355, now seen corresponding path program 32 times [2020-10-15 23:32:20,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:20,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829103568] [2020-10-15 23:32:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:20,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829103568] [2020-10-15 23:32:20,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866384133] [2020-10-15 23:32:20,586 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 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 [2020-10-15 23:32:20,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:20,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:20,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:20,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:20,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:20,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:20,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768859750] [2020-10-15 23:32:20,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:20,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:20,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:20,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:20,753 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:20,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 367 transitions, 14298 flow. Second operand 15 states. [2020-10-15 23:32:20,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:20,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:20,753 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:21,118 INFO L129 PetriNetUnfolder]: 271/713 cut-off events. [2020-10-15 23:32:21,118 INFO L130 PetriNetUnfolder]: For 74364/74370 co-relation queries the response was YES. [2020-10-15 23:32:21,129 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10610 conditions, 713 events. 271/713 cut-off events. For 74364/74370 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 5205 event pairs, 0 based on Foata normal form. 7/720 useless extension candidates. Maximal degree in co-relation 10481. Up to 404 conditions per place. [2020-10-15 23:32:21,137 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 277 selfloop transitions, 99 changer transitions 0/383 dead transitions. [2020-10-15 23:32:21,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 383 transitions, 15448 flow [2020-10-15 23:32:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 23:32:21,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-15 23:32:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1012 transitions. [2020-10-15 23:32:21,140 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755674232309746 [2020-10-15 23:32:21,140 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1012 transitions. [2020-10-15 23:32:21,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1012 transitions. [2020-10-15 23:32:21,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:21,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1012 transitions. [2020-10-15 23:32:21,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-15 23:32:21,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-15 23:32:21,142 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-15 23:32:21,143 INFO L185 Difference]: Start difference. First operand has 303 places, 367 transitions, 14298 flow. Second operand 14 states and 1012 transitions. [2020-10-15 23:32:21,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 383 transitions, 15448 flow [2020-10-15 23:32:21,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 383 transitions, 15347 flow, removed 1 selfloop flow, removed 9 redundant places. [2020-10-15 23:32:21,386 INFO L241 Difference]: Finished difference. Result has 310 places, 373 transitions, 14739 flow [2020-10-15 23:32:21,386 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=14198, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14739, PETRI_PLACES=310, PETRI_TRANSITIONS=373} [2020-10-15 23:32:21,386 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 292 predicate places. [2020-10-15 23:32:21,386 INFO L481 AbstractCegarLoop]: Abstraction has has 310 places, 373 transitions, 14739 flow [2020-10-15 23:32:21,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:21,387 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:21,387 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:21,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:21,597 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1391027045, now seen corresponding path program 33 times [2020-10-15 23:32:21,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:21,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958067658] [2020-10-15 23:32:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:21,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958067658] [2020-10-15 23:32:21,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855596060] [2020-10-15 23:32:21,674 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 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 [2020-10-15 23:32:21,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 23:32:21,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:21,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:21,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:21,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:21,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:21,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450495095] [2020-10-15 23:32:21,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:21,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:21,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:21,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:21,839 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:21,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 373 transitions, 14739 flow. Second operand 15 states. [2020-10-15 23:32:21,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:21,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:21,840 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:22,290 INFO L129 PetriNetUnfolder]: 273/718 cut-off events. [2020-10-15 23:32:22,290 INFO L130 PetriNetUnfolder]: For 78177/78179 co-relation queries the response was YES. [2020-10-15 23:32:22,297 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10886 conditions, 718 events. 273/718 cut-off events. For 78177/78179 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 5266 event pairs, 0 based on Foata normal form. 3/721 useless extension candidates. Maximal degree in co-relation 10754. Up to 407 conditions per place. [2020-10-15 23:32:22,302 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 279 selfloop transitions, 99 changer transitions 0/385 dead transitions. [2020-10-15 23:32:22,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 385 transitions, 15861 flow [2020-10-15 23:32:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 23:32:22,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-15 23:32:22,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1012 transitions. [2020-10-15 23:32:22,304 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755674232309746 [2020-10-15 23:32:22,305 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1012 transitions. [2020-10-15 23:32:22,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1012 transitions. [2020-10-15 23:32:22,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:22,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1012 transitions. [2020-10-15 23:32:22,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-15 23:32:22,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-15 23:32:22,307 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-15 23:32:22,307 INFO L185 Difference]: Start difference. First operand has 310 places, 373 transitions, 14739 flow. Second operand 14 states and 1012 transitions. [2020-10-15 23:32:22,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 385 transitions, 15861 flow [2020-10-15 23:32:22,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 385 transitions, 15757 flow, removed 0 selfloop flow, removed 10 redundant places. [2020-10-15 23:32:22,580 INFO L241 Difference]: Finished difference. Result has 316 places, 377 transitions, 15162 flow [2020-10-15 23:32:22,581 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=14636, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15162, PETRI_PLACES=316, PETRI_TRANSITIONS=377} [2020-10-15 23:32:22,581 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 298 predicate places. [2020-10-15 23:32:22,581 INFO L481 AbstractCegarLoop]: Abstraction has has 316 places, 377 transitions, 15162 flow [2020-10-15 23:32:22,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:22,581 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:22,581 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:22,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-15 23:32:22,782 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:22,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:22,783 INFO L82 PathProgramCache]: Analyzing trace with hash 995310267, now seen corresponding path program 34 times [2020-10-15 23:32:22,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:22,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264278993] [2020-10-15 23:32:22,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:22,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264278993] [2020-10-15 23:32:22,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651120988] [2020-10-15 23:32:22,851 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 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 [2020-10-15 23:32:22,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:32:22,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:22,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:22,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:22,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:32:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:23,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:23,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:23,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607837934] [2020-10-15 23:32:23,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:23,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:23,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:23,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:23,014 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:23,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 377 transitions, 15162 flow. Second operand 15 states. [2020-10-15 23:32:23,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:23,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:23,016 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:23,569 INFO L129 PetriNetUnfolder]: 279/734 cut-off events. [2020-10-15 23:32:23,570 INFO L130 PetriNetUnfolder]: For 86867/86869 co-relation queries the response was YES. [2020-10-15 23:32:23,576 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11410 conditions, 734 events. 279/734 cut-off events. For 86867/86869 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 5376 event pairs, 0 based on Foata normal form. 4/738 useless extension candidates. Maximal degree in co-relation 11275. Up to 362 conditions per place. [2020-10-15 23:32:23,583 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 212 selfloop transitions, 176 changer transitions 0/395 dead transitions. [2020-10-15 23:32:23,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 395 transitions, 16736 flow [2020-10-15 23:32:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 23:32:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 23:32:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1089 transitions. [2020-10-15 23:32:23,584 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2020-10-15 23:32:23,584 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1089 transitions. [2020-10-15 23:32:23,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1089 transitions. [2020-10-15 23:32:23,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:23,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1089 transitions. [2020-10-15 23:32:23,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-15 23:32:23,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-15 23:32:23,586 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-15 23:32:23,586 INFO L185 Difference]: Start difference. First operand has 316 places, 377 transitions, 15162 flow. Second operand 15 states and 1089 transitions. [2020-10-15 23:32:23,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 395 transitions, 16736 flow [2020-10-15 23:32:23,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 395 transitions, 16607 flow, removed 15 selfloop flow, removed 10 redundant places. [2020-10-15 23:32:23,874 INFO L241 Difference]: Finished difference. Result has 323 places, 385 transitions, 16150 flow [2020-10-15 23:32:23,874 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=15033, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=16150, PETRI_PLACES=323, PETRI_TRANSITIONS=385} [2020-10-15 23:32:23,875 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 305 predicate places. [2020-10-15 23:32:23,875 INFO L481 AbstractCegarLoop]: Abstraction has has 323 places, 385 transitions, 16150 flow [2020-10-15 23:32:23,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:23,875 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:23,875 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:24,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 23:32:24,076 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:24,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:24,076 INFO L82 PathProgramCache]: Analyzing trace with hash 995309306, now seen corresponding path program 35 times [2020-10-15 23:32:24,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:24,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228398219] [2020-10-15 23:32:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228398219] [2020-10-15 23:32:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255544369] [2020-10-15 23:32:24,148 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 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 [2020-10-15 23:32:24,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 23:32:24,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:24,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:24,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:24,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:32:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:24,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:24,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:24,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857647079] [2020-10-15 23:32:24,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:24,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:24,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:24,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:24,356 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:24,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 385 transitions, 16150 flow. Second operand 15 states. [2020-10-15 23:32:24,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:24,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:24,357 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:25,146 INFO L129 PetriNetUnfolder]: 293/769 cut-off events. [2020-10-15 23:32:25,146 INFO L130 PetriNetUnfolder]: For 103154/103160 co-relation queries the response was YES. [2020-10-15 23:32:25,154 INFO L80 FinitePrefix]: Finished finitePrefix Result has 12481 conditions, 769 events. 293/769 cut-off events. For 103154/103160 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 5704 event pairs, 0 based on Foata normal form. 9/778 useless extension candidates. Maximal degree in co-relation 12343. Up to 368 conditions per place. [2020-10-15 23:32:25,161 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 178 selfloop transitions, 226 changer transitions 0/411 dead transitions. [2020-10-15 23:32:25,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 411 transitions, 18415 flow [2020-10-15 23:32:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 23:32:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-15 23:32:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1525 transitions. [2020-10-15 23:32:25,163 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6786826880284824 [2020-10-15 23:32:25,163 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1525 transitions. [2020-10-15 23:32:25,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1525 transitions. [2020-10-15 23:32:25,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:25,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1525 transitions. [2020-10-15 23:32:25,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-15 23:32:25,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-15 23:32:25,165 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-15 23:32:25,165 INFO L185 Difference]: Start difference. First operand has 323 places, 385 transitions, 16150 flow. Second operand 21 states and 1525 transitions. [2020-10-15 23:32:25,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 411 transitions, 18415 flow [2020-10-15 23:32:25,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 411 transitions, 17897 flow, removed 155 selfloop flow, removed 12 redundant places. [2020-10-15 23:32:25,488 INFO L241 Difference]: Finished difference. Result has 334 places, 406 transitions, 17644 flow [2020-10-15 23:32:25,488 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=15636, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=17644, PETRI_PLACES=334, PETRI_TRANSITIONS=406} [2020-10-15 23:32:25,489 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 316 predicate places. [2020-10-15 23:32:25,489 INFO L481 AbstractCegarLoop]: Abstraction has has 334 places, 406 transitions, 17644 flow [2020-10-15 23:32:25,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:25,489 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:25,489 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:25,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:25,690 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:25,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:25,690 INFO L82 PathProgramCache]: Analyzing trace with hash 995279515, now seen corresponding path program 36 times [2020-10-15 23:32:25,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:25,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932652232] [2020-10-15 23:32:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:25,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932652232] [2020-10-15 23:32:25,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806684932] [2020-10-15 23:32:25,763 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 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 [2020-10-15 23:32:25,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 23:32:25,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:25,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:25,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:25,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:32:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:25,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:25,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:25,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430780363] [2020-10-15 23:32:25,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:25,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:25,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:25,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:25,949 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:25,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 406 transitions, 17644 flow. Second operand 15 states. [2020-10-15 23:32:25,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:25,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:25,950 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:26,726 INFO L129 PetriNetUnfolder]: 302/793 cut-off events. [2020-10-15 23:32:26,726 INFO L130 PetriNetUnfolder]: For 105731/105733 co-relation queries the response was YES. [2020-10-15 23:32:26,734 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13239 conditions, 793 events. 302/793 cut-off events. For 105731/105733 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 5849 event pairs, 0 based on Foata normal form. 4/797 useless extension candidates. Maximal degree in co-relation 13099. Up to 445 conditions per place. [2020-10-15 23:32:26,741 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 252 selfloop transitions, 166 changer transitions 0/425 dead transitions. [2020-10-15 23:32:26,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 425 transitions, 19514 flow [2020-10-15 23:32:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 23:32:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-15 23:32:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1524 transitions. [2020-10-15 23:32:26,743 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.678237650200267 [2020-10-15 23:32:26,743 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1524 transitions. [2020-10-15 23:32:26,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1524 transitions. [2020-10-15 23:32:26,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:26,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1524 transitions. [2020-10-15 23:32:26,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-15 23:32:26,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-15 23:32:26,746 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-15 23:32:26,746 INFO L185 Difference]: Start difference. First operand has 334 places, 406 transitions, 17644 flow. Second operand 21 states and 1524 transitions. [2020-10-15 23:32:26,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 425 transitions, 19514 flow [2020-10-15 23:32:27,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 425 transitions, 18711 flow, removed 288 selfloop flow, removed 15 redundant places. [2020-10-15 23:32:27,115 INFO L241 Difference]: Finished difference. Result has 342 places, 419 transitions, 18165 flow [2020-10-15 23:32:27,116 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=16890, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=18165, PETRI_PLACES=342, PETRI_TRANSITIONS=419} [2020-10-15 23:32:27,116 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 324 predicate places. [2020-10-15 23:32:27,116 INFO L481 AbstractCegarLoop]: Abstraction has has 342 places, 419 transitions, 18165 flow [2020-10-15 23:32:27,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:27,116 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:27,116 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:27,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 23:32:27,317 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:27,317 INFO L82 PathProgramCache]: Analyzing trace with hash 679424545, now seen corresponding path program 37 times [2020-10-15 23:32:27,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:27,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131469024] [2020-10-15 23:32:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:27,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131469024] [2020-10-15 23:32:27,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679790729] [2020-10-15 23:32:27,425 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 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 [2020-10-15 23:32:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:27,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:27,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:27,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:27,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:27,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146516416] [2020-10-15 23:32:27,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:27,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:27,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:27,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:27,632 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:27,633 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 419 transitions, 18165 flow. Second operand 15 states. [2020-10-15 23:32:27,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:27,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:27,633 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:27,920 INFO L129 PetriNetUnfolder]: 303/795 cut-off events. [2020-10-15 23:32:27,920 INFO L130 PetriNetUnfolder]: For 104179/104185 co-relation queries the response was YES. [2020-10-15 23:32:27,928 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13261 conditions, 795 events. 303/795 cut-off events. For 104179/104185 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 5931 event pairs, 0 based on Foata normal form. 7/802 useless extension candidates. Maximal degree in co-relation 13118. Up to 496 conditions per place. [2020-10-15 23:32:27,935 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 351 selfloop transitions, 71 changer transitions 0/429 dead transitions. [2020-10-15 23:32:27,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 429 transitions, 19314 flow [2020-10-15 23:32:27,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 23:32:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-15 23:32:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 797 transitions. [2020-10-15 23:32:27,939 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6771452846219201 [2020-10-15 23:32:27,939 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 797 transitions. [2020-10-15 23:32:27,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 797 transitions. [2020-10-15 23:32:27,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:27,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 797 transitions. [2020-10-15 23:32:27,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-15 23:32:27,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-15 23:32:27,941 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-15 23:32:27,941 INFO L185 Difference]: Start difference. First operand has 342 places, 419 transitions, 18165 flow. Second operand 11 states and 797 transitions. [2020-10-15 23:32:27,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 429 transitions, 19314 flow [2020-10-15 23:32:28,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 429 transitions, 18868 flow, removed 138 selfloop flow, removed 17 redundant places. [2020-10-15 23:32:28,296 INFO L241 Difference]: Finished difference. Result has 337 places, 421 transitions, 18067 flow [2020-10-15 23:32:28,296 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=17738, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18067, PETRI_PLACES=337, PETRI_TRANSITIONS=421} [2020-10-15 23:32:28,296 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 319 predicate places. [2020-10-15 23:32:28,296 INFO L481 AbstractCegarLoop]: Abstraction has has 337 places, 421 transitions, 18067 flow [2020-10-15 23:32:28,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:28,296 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:28,297 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:28,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 23:32:28,497 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash -732586146, now seen corresponding path program 38 times [2020-10-15 23:32:28,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:28,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888053560] [2020-10-15 23:32:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:28,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888053560] [2020-10-15 23:32:28,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349174953] [2020-10-15 23:32:28,576 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 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 [2020-10-15 23:32:28,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:28,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:28,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:28,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:30,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:32:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:30,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:30,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:30,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695657047] [2020-10-15 23:32:30,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:30,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:30,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:30,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=144, Unknown=1, NotChecked=0, Total=210 [2020-10-15 23:32:30,821 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:30,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 421 transitions, 18067 flow. Second operand 15 states. [2020-10-15 23:32:30,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:30,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:30,822 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:35,144 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 23:32:39,271 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 23:32:40,004 INFO L129 PetriNetUnfolder]: 314/825 cut-off events. [2020-10-15 23:32:40,004 INFO L130 PetriNetUnfolder]: For 116347/116353 co-relation queries the response was YES. [2020-10-15 23:32:40,013 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13961 conditions, 825 events. 314/825 cut-off events. For 116347/116353 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 6221 event pairs, 0 based on Foata normal form. 9/834 useless extension candidates. Maximal degree in co-relation 13816. Up to 327 conditions per place. [2020-10-15 23:32:40,020 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 147 selfloop transitions, 287 changer transitions 0/441 dead transitions. [2020-10-15 23:32:40,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 441 transitions, 20269 flow [2020-10-15 23:32:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 23:32:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 23:32:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1670 transitions. [2020-10-15 23:32:40,023 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785859406745226 [2020-10-15 23:32:40,023 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1670 transitions. [2020-10-15 23:32:40,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1670 transitions. [2020-10-15 23:32:40,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:40,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1670 transitions. [2020-10-15 23:32:40,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-15 23:32:40,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-15 23:32:40,025 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-15 23:32:40,025 INFO L185 Difference]: Start difference. First operand has 337 places, 421 transitions, 18067 flow. Second operand 23 states and 1670 transitions. [2020-10-15 23:32:40,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 441 transitions, 20269 flow [2020-10-15 23:32:40,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 441 transitions, 20185 flow, removed 0 selfloop flow, removed 8 redundant places. [2020-10-15 23:32:40,395 INFO L241 Difference]: Finished difference. Result has 354 places, 437 transitions, 20050 flow [2020-10-15 23:32:40,396 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=17985, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=20050, PETRI_PLACES=354, PETRI_TRANSITIONS=437} [2020-10-15 23:32:40,396 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 336 predicate places. [2020-10-15 23:32:40,396 INFO L481 AbstractCegarLoop]: Abstraction has has 354 places, 437 transitions, 20050 flow [2020-10-15 23:32:40,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:40,396 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:40,396 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:40,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 23:32:40,597 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:40,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1790926416, now seen corresponding path program 39 times [2020-10-15 23:32:40,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:40,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360981328] [2020-10-15 23:32:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:40,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360981328] [2020-10-15 23:32:40,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000802565] [2020-10-15 23:32:40,687 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 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 [2020-10-15 23:32:40,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 23:32:40,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:40,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:40,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:40,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:40,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:40,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470148220] [2020-10-15 23:32:40,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:40,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:40,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:40,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:40,905 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:40,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 437 transitions, 20050 flow. Second operand 15 states. [2020-10-15 23:32:40,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:40,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:40,906 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:41,253 INFO L129 PetriNetUnfolder]: 316/828 cut-off events. [2020-10-15 23:32:41,253 INFO L130 PetriNetUnfolder]: For 120194/120200 co-relation queries the response was YES. [2020-10-15 23:32:41,261 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14578 conditions, 828 events. 316/828 cut-off events. For 120194/120200 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 6244 event pairs, 0 based on Foata normal form. 7/835 useless extension candidates. Maximal degree in co-relation 14430. Up to 489 conditions per place. [2020-10-15 23:32:41,269 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 342 selfloop transitions, 102 changer transitions 0/451 dead transitions. [2020-10-15 23:32:41,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 451 transitions, 21477 flow [2020-10-15 23:32:41,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 23:32:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-15 23:32:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 869 transitions. [2020-10-15 23:32:41,270 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676791277258567 [2020-10-15 23:32:41,270 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 869 transitions. [2020-10-15 23:32:41,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 869 transitions. [2020-10-15 23:32:41,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:41,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 869 transitions. [2020-10-15 23:32:41,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-15 23:32:41,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-15 23:32:41,272 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-15 23:32:41,272 INFO L185 Difference]: Start difference. First operand has 354 places, 437 transitions, 20050 flow. Second operand 12 states and 869 transitions. [2020-10-15 23:32:41,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 451 transitions, 21477 flow [2020-10-15 23:32:41,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 451 transitions, 20436 flow, removed 416 selfloop flow, removed 17 redundant places. [2020-10-15 23:32:41,724 INFO L241 Difference]: Finished difference. Result has 350 places, 440 transitions, 19637 flow [2020-10-15 23:32:41,724 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=19095, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=19637, PETRI_PLACES=350, PETRI_TRANSITIONS=440} [2020-10-15 23:32:41,724 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 332 predicate places. [2020-10-15 23:32:41,724 INFO L481 AbstractCegarLoop]: Abstraction has has 350 places, 440 transitions, 19637 flow [2020-10-15 23:32:41,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:41,724 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:41,725 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:41,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:41,925 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:41,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:41,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1244198512, now seen corresponding path program 40 times [2020-10-15 23:32:41,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:41,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599896791] [2020-10-15 23:32:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:41,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599896791] [2020-10-15 23:32:41,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664861709] [2020-10-15 23:32:41,999 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 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 [2020-10-15 23:32:42,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:32:42,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:42,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:42,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:42,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:32:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:42,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:42,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:42,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235295410] [2020-10-15 23:32:42,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:42,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:42,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:42,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:42,168 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:42,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 440 transitions, 19637 flow. Second operand 15 states. [2020-10-15 23:32:42,169 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:42,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:42,169 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:42,933 INFO L129 PetriNetUnfolder]: 322/845 cut-off events. [2020-10-15 23:32:42,933 INFO L130 PetriNetUnfolder]: For 122933/122935 co-relation queries the response was YES. [2020-10-15 23:32:42,947 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14576 conditions, 845 events. 322/845 cut-off events. For 122933/122935 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 6353 event pairs, 0 based on Foata normal form. 4/849 useless extension candidates. Maximal degree in co-relation 14426. Up to 443 conditions per place. [2020-10-15 23:32:42,955 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 271 selfloop transitions, 179 changer transitions 0/457 dead transitions. [2020-10-15 23:32:42,955 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 457 transitions, 21448 flow [2020-10-15 23:32:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 23:32:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 23:32:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1089 transitions. [2020-10-15 23:32:42,956 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2020-10-15 23:32:42,956 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1089 transitions. [2020-10-15 23:32:42,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1089 transitions. [2020-10-15 23:32:42,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:42,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1089 transitions. [2020-10-15 23:32:42,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-15 23:32:42,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-15 23:32:42,958 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-15 23:32:42,958 INFO L185 Difference]: Start difference. First operand has 350 places, 440 transitions, 19637 flow. Second operand 15 states and 1089 transitions. [2020-10-15 23:32:42,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 457 transitions, 21448 flow [2020-10-15 23:32:43,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 457 transitions, 21342 flow, removed 0 selfloop flow, removed 9 redundant places. [2020-10-15 23:32:43,386 INFO L241 Difference]: Finished difference. Result has 358 places, 448 transitions, 20739 flow [2020-10-15 23:32:43,386 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=19533, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=20739, PETRI_PLACES=358, PETRI_TRANSITIONS=448} [2020-10-15 23:32:43,386 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 340 predicate places. [2020-10-15 23:32:43,386 INFO L481 AbstractCegarLoop]: Abstraction has has 358 places, 448 transitions, 20739 flow [2020-10-15 23:32:43,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:43,386 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:43,387 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:43,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:43,587 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:43,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:43,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1868755952, now seen corresponding path program 41 times [2020-10-15 23:32:43,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:43,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615528733] [2020-10-15 23:32:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:43,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615528733] [2020-10-15 23:32:43,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143577914] [2020-10-15 23:32:43,661 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 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 [2020-10-15 23:32:43,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:43,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:43,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:43,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:32:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:43,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:43,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:43,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553632257] [2020-10-15 23:32:43,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:43,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:43,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:43,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:43,913 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:43,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 448 transitions, 20739 flow. Second operand 15 states. [2020-10-15 23:32:43,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:43,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:43,914 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:44,801 INFO L129 PetriNetUnfolder]: 329/868 cut-off events. [2020-10-15 23:32:44,801 INFO L130 PetriNetUnfolder]: For 131456/131458 co-relation queries the response was YES. [2020-10-15 23:32:44,810 INFO L80 FinitePrefix]: Finished finitePrefix Result has 15378 conditions, 868 events. 329/868 cut-off events. For 131456/131458 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 6654 event pairs, 0 based on Foata normal form. 4/872 useless extension candidates. Maximal degree in co-relation 15225. Up to 348 conditions per place. [2020-10-15 23:32:44,818 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 159 selfloop transitions, 300 changer transitions 0/466 dead transitions. [2020-10-15 23:32:44,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 466 transitions, 22645 flow [2020-10-15 23:32:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 23:32:44,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-15 23:32:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1814 transitions. [2020-10-15 23:32:44,820 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6781308411214954 [2020-10-15 23:32:44,820 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1814 transitions. [2020-10-15 23:32:44,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1814 transitions. [2020-10-15 23:32:44,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:44,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1814 transitions. [2020-10-15 23:32:44,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-15 23:32:44,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-15 23:32:44,824 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-15 23:32:44,824 INFO L185 Difference]: Start difference. First operand has 358 places, 448 transitions, 20739 flow. Second operand 25 states and 1814 transitions. [2020-10-15 23:32:44,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 466 transitions, 22645 flow [2020-10-15 23:32:45,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 466 transitions, 22166 flow, removed 159 selfloop flow, removed 11 redundant places. [2020-10-15 23:32:45,302 INFO L241 Difference]: Finished difference. Result has 374 places, 457 transitions, 21860 flow [2020-10-15 23:32:45,302 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=20260, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=21860, PETRI_PLACES=374, PETRI_TRANSITIONS=457} [2020-10-15 23:32:45,302 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 356 predicate places. [2020-10-15 23:32:45,302 INFO L481 AbstractCegarLoop]: Abstraction has has 374 places, 457 transitions, 21860 flow [2020-10-15 23:32:45,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:45,303 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:45,303 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:45,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:45,509 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:45,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:45,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1868994063, now seen corresponding path program 42 times [2020-10-15 23:32:45,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:45,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368620133] [2020-10-15 23:32:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:45,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368620133] [2020-10-15 23:32:45,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297396331] [2020-10-15 23:32:45,581 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 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 [2020-10-15 23:32:45,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 23:32:45,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:45,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:45,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:45,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:45,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:45,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991542613] [2020-10-15 23:32:45,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:45,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:45,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:45,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:45,749 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:45,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 457 transitions, 21860 flow. Second operand 15 states. [2020-10-15 23:32:45,750 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:45,750 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:45,750 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:46,302 INFO L129 PetriNetUnfolder]: 340/896 cut-off events. [2020-10-15 23:32:46,302 INFO L130 PetriNetUnfolder]: For 139296/139302 co-relation queries the response was YES. [2020-10-15 23:32:46,311 INFO L80 FinitePrefix]: Finished finitePrefix Result has 16267 conditions, 896 events. 340/896 cut-off events. For 139296/139302 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 6917 event pairs, 0 based on Foata normal form. 7/903 useless extension candidates. Maximal degree in co-relation 16111. Up to 462 conditions per place. [2020-10-15 23:32:46,320 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 307 selfloop transitions, 172 changer transitions 0/486 dead transitions. [2020-10-15 23:32:46,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 486 transitions, 24079 flow [2020-10-15 23:32:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 23:32:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 23:32:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1086 transitions. [2020-10-15 23:32:46,321 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6766355140186916 [2020-10-15 23:32:46,322 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1086 transitions. [2020-10-15 23:32:46,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1086 transitions. [2020-10-15 23:32:46,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:46,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1086 transitions. [2020-10-15 23:32:46,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-15 23:32:46,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-15 23:32:46,325 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-15 23:32:46,325 INFO L185 Difference]: Start difference. First operand has 374 places, 457 transitions, 21860 flow. Second operand 15 states and 1086 transitions. [2020-10-15 23:32:46,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 486 transitions, 24079 flow [2020-10-15 23:32:46,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 486 transitions, 23349 flow, removed 253 selfloop flow, removed 19 redundant places. [2020-10-15 23:32:46,915 INFO L241 Difference]: Finished difference. Result has 373 places, 473 transitions, 22699 flow [2020-10-15 23:32:46,916 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=21260, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22699, PETRI_PLACES=373, PETRI_TRANSITIONS=473} [2020-10-15 23:32:46,916 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 355 predicate places. [2020-10-15 23:32:46,916 INFO L481 AbstractCegarLoop]: Abstraction has has 373 places, 473 transitions, 22699 flow [2020-10-15 23:32:46,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:46,916 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:46,916 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:47,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:47,122 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:47,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:47,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1869709264, now seen corresponding path program 43 times [2020-10-15 23:32:47,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:47,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010726078] [2020-10-15 23:32:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:47,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010726078] [2020-10-15 23:32:47,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128263500] [2020-10-15 23:32:47,199 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 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 [2020-10-15 23:32:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:47,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:47,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:47,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:32:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:47,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:47,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:47,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300604944] [2020-10-15 23:32:47,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:47,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:47,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:47,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:47,329 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:47,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 473 transitions, 22699 flow. Second operand 15 states. [2020-10-15 23:32:47,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:47,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:47,330 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:47,933 INFO L129 PetriNetUnfolder]: 347/915 cut-off events. [2020-10-15 23:32:47,933 INFO L130 PetriNetUnfolder]: For 149623/149629 co-relation queries the response was YES. [2020-10-15 23:32:47,943 INFO L80 FinitePrefix]: Finished finitePrefix Result has 16820 conditions, 915 events. 347/915 cut-off events. For 149623/149629 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 7103 event pairs, 0 based on Foata normal form. 8/923 useless extension candidates. Maximal degree in co-relation 16660. Up to 507 conditions per place. [2020-10-15 23:32:47,952 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 324 selfloop transitions, 155 changer transitions 0/486 dead transitions. [2020-10-15 23:32:47,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 486 transitions, 24611 flow [2020-10-15 23:32:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 23:32:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 23:32:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1089 transitions. [2020-10-15 23:32:47,954 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2020-10-15 23:32:47,954 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1089 transitions. [2020-10-15 23:32:47,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1089 transitions. [2020-10-15 23:32:47,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:47,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1089 transitions. [2020-10-15 23:32:47,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-15 23:32:47,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-15 23:32:47,957 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-15 23:32:47,957 INFO L185 Difference]: Start difference. First operand has 373 places, 473 transitions, 22699 flow. Second operand 15 states and 1089 transitions. [2020-10-15 23:32:47,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 486 transitions, 24611 flow [2020-10-15 23:32:48,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 486 transitions, 24412 flow, removed 25 selfloop flow, removed 9 redundant places. [2020-10-15 23:32:48,489 INFO L241 Difference]: Finished difference. Result has 381 places, 482 transitions, 23788 flow [2020-10-15 23:32:48,490 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=22503, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=23788, PETRI_PLACES=381, PETRI_TRANSITIONS=482} [2020-10-15 23:32:48,490 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 363 predicate places. [2020-10-15 23:32:48,490 INFO L481 AbstractCegarLoop]: Abstraction has has 381 places, 482 transitions, 23788 flow [2020-10-15 23:32:48,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:48,490 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:48,490 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:48,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-15 23:32:48,691 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:48,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:48,692 INFO L82 PathProgramCache]: Analyzing trace with hash -704881477, now seen corresponding path program 44 times [2020-10-15 23:32:48,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:48,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161802649] [2020-10-15 23:32:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:48,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161802649] [2020-10-15 23:32:48,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231925001] [2020-10-15 23:32:48,764 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 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 [2020-10-15 23:32:48,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:32:48,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:48,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:48,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:48,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:32:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:48,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:48,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:48,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175631144] [2020-10-15 23:32:48,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:48,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:48,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:48,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:48,911 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:48,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 482 transitions, 23788 flow. Second operand 15 states. [2020-10-15 23:32:48,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:48,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:48,912 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:49,691 INFO L129 PetriNetUnfolder]: 360/949 cut-off events. [2020-10-15 23:32:49,691 INFO L130 PetriNetUnfolder]: For 164285/164287 co-relation queries the response was YES. [2020-10-15 23:32:49,702 INFO L80 FinitePrefix]: Finished finitePrefix Result has 17774 conditions, 949 events. 360/949 cut-off events. For 164285/164287 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 7330 event pairs, 0 based on Foata normal form. 4/953 useless extension candidates. Maximal degree in co-relation 17611. Up to 571 conditions per place. [2020-10-15 23:32:49,711 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 348 selfloop transitions, 151 changer transitions 0/506 dead transitions. [2020-10-15 23:32:49,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 506 transitions, 26146 flow [2020-10-15 23:32:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 23:32:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 23:32:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1669 transitions. [2020-10-15 23:32:49,713 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.678179601787891 [2020-10-15 23:32:49,713 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1669 transitions. [2020-10-15 23:32:49,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1669 transitions. [2020-10-15 23:32:49,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:49,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1669 transitions. [2020-10-15 23:32:49,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-15 23:32:49,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-15 23:32:49,715 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-15 23:32:49,715 INFO L185 Difference]: Start difference. First operand has 381 places, 482 transitions, 23788 flow. Second operand 23 states and 1669 transitions. [2020-10-15 23:32:49,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 506 transitions, 26146 flow [2020-10-15 23:32:50,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 506 transitions, 25500 flow, removed 258 selfloop flow, removed 9 redundant places. [2020-10-15 23:32:50,357 INFO L241 Difference]: Finished difference. Result has 397 places, 502 transitions, 24760 flow [2020-10-15 23:32:50,358 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=23145, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=24760, PETRI_PLACES=397, PETRI_TRANSITIONS=502} [2020-10-15 23:32:50,358 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 379 predicate places. [2020-10-15 23:32:50,358 INFO L481 AbstractCegarLoop]: Abstraction has has 397 places, 502 transitions, 24760 flow [2020-10-15 23:32:50,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:50,358 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:50,358 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:50,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:32:50,559 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:50,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:50,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1869708303, now seen corresponding path program 45 times [2020-10-15 23:32:50,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:50,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329423754] [2020-10-15 23:32:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:50,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329423754] [2020-10-15 23:32:50,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950083305] [2020-10-15 23:32:50,636 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 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 [2020-10-15 23:32:50,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 23:32:50,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:50,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:50,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:50,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:32:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:50,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:50,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:32:50,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487105459] [2020-10-15 23:32:50,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:32:50,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:50,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:32:50,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:32:50,801 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:50,802 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 502 transitions, 24760 flow. Second operand 15 states. [2020-10-15 23:32:50,802 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:50,802 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:50,803 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:32:51,695 INFO L129 PetriNetUnfolder]: 373/982 cut-off events. [2020-10-15 23:32:51,695 INFO L130 PetriNetUnfolder]: For 174948/174950 co-relation queries the response was YES. [2020-10-15 23:32:51,707 INFO L80 FinitePrefix]: Finished finitePrefix Result has 18532 conditions, 982 events. 373/982 cut-off events. For 174948/174950 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 7734 event pairs, 0 based on Foata normal form. 4/986 useless extension candidates. Maximal degree in co-relation 18366. Up to 498 conditions per place. [2020-10-15 23:32:51,717 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 261 selfloop transitions, 259 changer transitions 0/527 dead transitions. [2020-10-15 23:32:51,717 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 527 transitions, 27255 flow [2020-10-15 23:32:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 23:32:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 23:32:51,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1669 transitions. [2020-10-15 23:32:51,718 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.678179601787891 [2020-10-15 23:32:51,719 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1669 transitions. [2020-10-15 23:32:51,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1669 transitions. [2020-10-15 23:32:51,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:32:51,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1669 transitions. [2020-10-15 23:32:51,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-15 23:32:51,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-15 23:32:51,721 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-15 23:32:51,721 INFO L185 Difference]: Start difference. First operand has 397 places, 502 transitions, 24760 flow. Second operand 23 states and 1669 transitions. [2020-10-15 23:32:51,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 527 transitions, 27255 flow [2020-10-15 23:32:52,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 527 transitions, 26706 flow, removed 193 selfloop flow, removed 18 redundant places. [2020-10-15 23:32:52,325 INFO L241 Difference]: Finished difference. Result has 404 places, 521 transitions, 26197 flow [2020-10-15 23:32:52,326 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=24233, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=26197, PETRI_PLACES=404, PETRI_TRANSITIONS=521} [2020-10-15 23:32:52,326 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 386 predicate places. [2020-10-15 23:32:52,326 INFO L481 AbstractCegarLoop]: Abstraction has has 404 places, 521 transitions, 26197 flow [2020-10-15 23:32:52,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:32:52,326 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:32:52,326 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:32:52,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-15 23:32:52,527 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:32:52,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:32:52,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1869679473, now seen corresponding path program 46 times [2020-10-15 23:32:52,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:32:52,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165009345] [2020-10-15 23:32:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:32:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:32:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:52,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165009345] [2020-10-15 23:32:52,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493718929] [2020-10-15 23:32:52,611 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 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 [2020-10-15 23:32:52,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:32:52,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:32:52,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:32:52,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:32:52,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:32:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:32:54,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:32:54,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 23:32:54,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043616658] [2020-10-15 23:32:54,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 23:32:54,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:32:54,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 23:32:54,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=174, Unknown=1, NotChecked=0, Total=240 [2020-10-15 23:32:54,841 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:32:54,842 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 521 transitions, 26197 flow. Second operand 16 states. [2020-10-15 23:32:54,842 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:32:54,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:32:54,842 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:01,475 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 23:33:13,897 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 23:33:38,223 INFO L129 PetriNetUnfolder]: 388/1026 cut-off events. [2020-10-15 23:33:38,224 INFO L130 PetriNetUnfolder]: For 193772/193778 co-relation queries the response was YES. [2020-10-15 23:33:38,236 INFO L80 FinitePrefix]: Finished finitePrefix Result has 19881 conditions, 1026 events. 388/1026 cut-off events. For 193772/193778 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 8146 event pairs, 0 based on Foata normal form. 9/1035 useless extension candidates. Maximal degree in co-relation 19711. Up to 409 conditions per place. [2020-10-15 23:33:38,247 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 185 selfloop transitions, 355 changer transitions 0/547 dead transitions. [2020-10-15 23:33:38,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 547 transitions, 29209 flow [2020-10-15 23:33:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 23:33:38,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 23:33:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2104 transitions. [2020-10-15 23:33:38,249 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780534966161779 [2020-10-15 23:33:38,249 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2104 transitions. [2020-10-15 23:33:38,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2104 transitions. [2020-10-15 23:33:38,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:38,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2104 transitions. [2020-10-15 23:33:38,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-15 23:33:38,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-15 23:33:38,252 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-15 23:33:38,252 INFO L185 Difference]: Start difference. First operand has 404 places, 521 transitions, 26197 flow. Second operand 29 states and 2104 transitions. [2020-10-15 23:33:38,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 547 transitions, 29209 flow [2020-10-15 23:33:38,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 547 transitions, 28370 flow, removed 314 selfloop flow, removed 17 redundant places. [2020-10-15 23:33:38,972 INFO L241 Difference]: Finished difference. Result has 419 places, 542 transitions, 28163 flow [2020-10-15 23:33:38,973 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=25358, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=28163, PETRI_PLACES=419, PETRI_TRANSITIONS=542} [2020-10-15 23:33:38,973 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 401 predicate places. [2020-10-15 23:33:38,973 INFO L481 AbstractCegarLoop]: Abstraction has has 419 places, 542 transitions, 28163 flow [2020-10-15 23:33:38,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 23:33:38,973 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:38,973 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:33:39,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:39,180 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:33:39,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:39,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1869678512, now seen corresponding path program 47 times [2020-10-15 23:33:39,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:39,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071052829] [2020-10-15 23:33:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:39,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071052829] [2020-10-15 23:33:39,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563843537] [2020-10-15 23:33:39,262 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 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 [2020-10-15 23:33:39,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 23:33:39,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:33:39,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:33:39,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:39,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:33:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:39,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:39,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:33:39,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717343899] [2020-10-15 23:33:39,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:33:39,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:39,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:33:39,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:33:39,487 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:33:39,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 542 transitions, 28163 flow. Second operand 15 states. [2020-10-15 23:33:39,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:39,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:33:39,488 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:40,694 INFO L129 PetriNetUnfolder]: 398/1050 cut-off events. [2020-10-15 23:33:40,694 INFO L130 PetriNetUnfolder]: For 200965/200971 co-relation queries the response was YES. [2020-10-15 23:33:40,708 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20876 conditions, 1050 events. 398/1050 cut-off events. For 200965/200971 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 8355 event pairs, 0 based on Foata normal form. 8/1058 useless extension candidates. Maximal degree in co-relation 20701. Up to 562 conditions per place. [2020-10-15 23:33:40,718 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 297 selfloop transitions, 257 changer transitions 0/561 dead transitions. [2020-10-15 23:33:40,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 561 transitions, 30582 flow [2020-10-15 23:33:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 23:33:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 23:33:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1959 transitions. [2020-10-15 23:33:40,721 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780893042575286 [2020-10-15 23:33:40,721 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1959 transitions. [2020-10-15 23:33:40,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1959 transitions. [2020-10-15 23:33:40,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:40,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1959 transitions. [2020-10-15 23:33:40,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-15 23:33:40,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-15 23:33:40,723 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-15 23:33:40,723 INFO L185 Difference]: Start difference. First operand has 419 places, 542 transitions, 28163 flow. Second operand 27 states and 1959 transitions. [2020-10-15 23:33:40,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 561 transitions, 30582 flow [2020-10-15 23:33:41,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 561 transitions, 28704 flow, removed 757 selfloop flow, removed 23 redundant places. [2020-10-15 23:33:41,683 INFO L241 Difference]: Finished difference. Result has 425 places, 556 transitions, 28057 flow [2020-10-15 23:33:41,684 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=26290, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=28057, PETRI_PLACES=425, PETRI_TRANSITIONS=556} [2020-10-15 23:33:41,684 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 407 predicate places. [2020-10-15 23:33:41,684 INFO L481 AbstractCegarLoop]: Abstraction has has 425 places, 556 transitions, 28057 flow [2020-10-15 23:33:41,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:33:41,684 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:41,684 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:33:41,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-15 23:33:41,885 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:33:41,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:41,886 INFO L82 PathProgramCache]: Analyzing trace with hash -705564965, now seen corresponding path program 48 times [2020-10-15 23:33:41,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:41,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734574961] [2020-10-15 23:33:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:41,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734574961] [2020-10-15 23:33:41,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041144957] [2020-10-15 23:33:41,956 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 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 [2020-10-15 23:33:41,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 23:33:41,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:33:41,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:33:41,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:42,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:42,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:33:42,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895401720] [2020-10-15 23:33:42,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:33:42,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:42,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:33:42,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:33:42,123 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:33:42,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 556 transitions, 28057 flow. Second operand 15 states. [2020-10-15 23:33:42,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:42,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:33:42,124 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:42,953 INFO L129 PetriNetUnfolder]: 410/1082 cut-off events. [2020-10-15 23:33:42,953 INFO L130 PetriNetUnfolder]: For 190605/190611 co-relation queries the response was YES. [2020-10-15 23:33:42,967 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20727 conditions, 1082 events. 410/1082 cut-off events. For 190605/190611 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 8671 event pairs, 0 based on Foata normal form. 7/1089 useless extension candidates. Maximal degree in co-relation 20550. Up to 517 conditions per place. [2020-10-15 23:33:42,978 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 326 selfloop transitions, 264 changer transitions 0/597 dead transitions. [2020-10-15 23:33:42,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 597 transitions, 30730 flow [2020-10-15 23:33:42,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 23:33:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-15 23:33:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1520 transitions. [2020-10-15 23:33:42,979 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6764574988874055 [2020-10-15 23:33:42,979 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1520 transitions. [2020-10-15 23:33:42,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1520 transitions. [2020-10-15 23:33:42,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:42,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1520 transitions. [2020-10-15 23:33:42,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-15 23:33:42,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-15 23:33:42,981 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-15 23:33:42,981 INFO L185 Difference]: Start difference. First operand has 425 places, 556 transitions, 28057 flow. Second operand 21 states and 1520 transitions. [2020-10-15 23:33:42,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 597 transitions, 30730 flow [2020-10-15 23:33:43,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 597 transitions, 29669 flow, removed 378 selfloop flow, removed 24 redundant places. [2020-10-15 23:33:43,816 INFO L241 Difference]: Finished difference. Result has 424 places, 573 transitions, 28777 flow [2020-10-15 23:33:43,817 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=27040, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=28777, PETRI_PLACES=424, PETRI_TRANSITIONS=573} [2020-10-15 23:33:43,817 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 406 predicate places. [2020-10-15 23:33:43,817 INFO L481 AbstractCegarLoop]: Abstraction has has 424 places, 573 transitions, 28777 flow [2020-10-15 23:33:43,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:33:43,817 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:43,817 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:33:44,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:44,027 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:33:44,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:44,027 INFO L82 PathProgramCache]: Analyzing trace with hash -704851686, now seen corresponding path program 49 times [2020-10-15 23:33:44,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:44,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338187281] [2020-10-15 23:33:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:44,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338187281] [2020-10-15 23:33:44,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565905690] [2020-10-15 23:33:44,101 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 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 [2020-10-15 23:33:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:44,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:33:44,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:44,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:33:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:44,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:44,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:33:44,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504095634] [2020-10-15 23:33:44,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:33:44,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:44,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:33:44,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:33:44,243 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:33:44,244 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 573 transitions, 28777 flow. Second operand 15 states. [2020-10-15 23:33:44,244 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:44,244 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:33:44,244 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:45,424 INFO L129 PetriNetUnfolder]: 414/1090 cut-off events. [2020-10-15 23:33:45,424 INFO L130 PetriNetUnfolder]: For 195109/195115 co-relation queries the response was YES. [2020-10-15 23:33:45,437 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20907 conditions, 1090 events. 414/1090 cut-off events. For 195109/195115 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 8759 event pairs, 0 based on Foata normal form. 8/1098 useless extension candidates. Maximal degree in co-relation 20728. Up to 462 conditions per place. [2020-10-15 23:33:45,449 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 162 selfloop transitions, 412 changer transitions 0/581 dead transitions. [2020-10-15 23:33:45,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 581 transitions, 30582 flow [2020-10-15 23:33:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 23:33:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 23:33:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1959 transitions. [2020-10-15 23:33:45,455 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780893042575286 [2020-10-15 23:33:45,455 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1959 transitions. [2020-10-15 23:33:45,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1959 transitions. [2020-10-15 23:33:45,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:45,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1959 transitions. [2020-10-15 23:33:45,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-15 23:33:45,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-15 23:33:45,459 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-15 23:33:45,459 INFO L185 Difference]: Start difference. First operand has 424 places, 573 transitions, 28777 flow. Second operand 27 states and 1959 transitions. [2020-10-15 23:33:45,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 581 transitions, 30582 flow [2020-10-15 23:33:46,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 581 transitions, 30359 flow, removed 31 selfloop flow, removed 18 redundant places. [2020-10-15 23:33:46,294 INFO L241 Difference]: Finished difference. Result has 435 places, 579 transitions, 30085 flow [2020-10-15 23:33:46,295 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=28554, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=30085, PETRI_PLACES=435, PETRI_TRANSITIONS=579} [2020-10-15 23:33:46,295 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 417 predicate places. [2020-10-15 23:33:46,295 INFO L481 AbstractCegarLoop]: Abstraction has has 435 places, 579 transitions, 30085 flow [2020-10-15 23:33:46,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:33:46,295 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:46,295 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:33:46,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:46,509 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:33:46,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:46,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1868785743, now seen corresponding path program 50 times [2020-10-15 23:33:46,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:46,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906538310] [2020-10-15 23:33:46,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:46,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906538310] [2020-10-15 23:33:46,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550260109] [2020-10-15 23:33:46,586 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 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 [2020-10-15 23:33:46,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:33:46,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:33:46,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:33:46,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:46,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:33:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:46,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:46,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:33:46,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253609821] [2020-10-15 23:33:46,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:33:46,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:46,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:33:46,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:33:46,742 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:33:46,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 579 transitions, 30085 flow. Second operand 15 states. [2020-10-15 23:33:46,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:46,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:33:46,743 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:47,833 INFO L129 PetriNetUnfolder]: 420/1108 cut-off events. [2020-10-15 23:33:47,833 INFO L130 PetriNetUnfolder]: For 204699/204705 co-relation queries the response was YES. [2020-10-15 23:33:47,847 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21985 conditions, 1108 events. 420/1108 cut-off events. For 204699/204705 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 8929 event pairs, 0 based on Foata normal form. 8/1116 useless extension candidates. Maximal degree in co-relation 21807. Up to 466 conditions per place. [2020-10-15 23:33:47,859 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 238 selfloop transitions, 347 changer transitions 0/592 dead transitions. [2020-10-15 23:33:47,859 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 592 transitions, 32264 flow [2020-10-15 23:33:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 23:33:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 23:33:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1959 transitions. [2020-10-15 23:33:47,861 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780893042575286 [2020-10-15 23:33:47,862 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1959 transitions. [2020-10-15 23:33:47,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1959 transitions. [2020-10-15 23:33:47,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:47,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1959 transitions. [2020-10-15 23:33:47,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-15 23:33:47,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-15 23:33:47,866 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-15 23:33:47,866 INFO L185 Difference]: Start difference. First operand has 435 places, 579 transitions, 30085 flow. Second operand 27 states and 1959 transitions. [2020-10-15 23:33:47,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 592 transitions, 32264 flow [2020-10-15 23:33:48,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 592 transitions, 31380 flow, removed 263 selfloop flow, removed 23 redundant places. [2020-10-15 23:33:48,767 INFO L241 Difference]: Finished difference. Result has 441 places, 587 transitions, 30941 flow [2020-10-15 23:33:48,767 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=29203, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=30941, PETRI_PLACES=441, PETRI_TRANSITIONS=587} [2020-10-15 23:33:48,768 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 423 predicate places. [2020-10-15 23:33:48,768 INFO L481 AbstractCegarLoop]: Abstraction has has 441 places, 587 transitions, 30941 flow [2020-10-15 23:33:48,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:33:48,768 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:48,768 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:33:48,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-10-15 23:33:48,969 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:33:48,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:48,969 INFO L82 PathProgramCache]: Analyzing trace with hash -322994418, now seen corresponding path program 6 times [2020-10-15 23:33:48,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:48,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814523859] [2020-10-15 23:33:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:49,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814523859] [2020-10-15 23:33:49,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407818877] [2020-10-15 23:33:49,224 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 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 [2020-10-15 23:33:49,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 23:33:49,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:33:49,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:33:49,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:49,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:33:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:49,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:49,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 23:33:49,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898647817] [2020-10-15 23:33:49,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 23:33:49,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:49,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 23:33:49,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 23:33:49,447 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:33:49,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 587 transitions, 30941 flow. Second operand 18 states. [2020-10-15 23:33:49,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:49,448 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:33:49,448 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:50,037 INFO L129 PetriNetUnfolder]: 430/1135 cut-off events. [2020-10-15 23:33:50,037 INFO L130 PetriNetUnfolder]: For 218898/218904 co-relation queries the response was YES. [2020-10-15 23:33:50,052 INFO L80 FinitePrefix]: Finished finitePrefix Result has 23024 conditions, 1135 events. 430/1135 cut-off events. For 218898/218904 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 9221 event pairs, 0 based on Foata normal form. 8/1143 useless extension candidates. Maximal degree in co-relation 22843. Up to 756 conditions per place. [2020-10-15 23:33:50,064 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 523 selfloop transitions, 74 changer transitions 0/604 dead transitions. [2020-10-15 23:33:50,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 604 transitions, 33541 flow [2020-10-15 23:33:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:33:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:33:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1234 transitions. [2020-10-15 23:33:50,066 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783947223749313 [2020-10-15 23:33:50,066 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1234 transitions. [2020-10-15 23:33:50,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1234 transitions. [2020-10-15 23:33:50,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:50,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1234 transitions. [2020-10-15 23:33:50,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:33:50,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:33:50,068 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:33:50,068 INFO L185 Difference]: Start difference. First operand has 441 places, 587 transitions, 30941 flow. Second operand 17 states and 1234 transitions. [2020-10-15 23:33:50,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 604 transitions, 33541 flow [2020-10-15 23:33:50,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 604 transitions, 32187 flow, removed 468 selfloop flow, removed 21 redundant places. [2020-10-15 23:33:50,949 INFO L241 Difference]: Finished difference. Result has 439 places, 601 transitions, 31048 flow [2020-10-15 23:33:50,950 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=29591, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=31048, PETRI_PLACES=439, PETRI_TRANSITIONS=601} [2020-10-15 23:33:50,950 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 421 predicate places. [2020-10-15 23:33:50,950 INFO L481 AbstractCegarLoop]: Abstraction has has 439 places, 601 transitions, 31048 flow [2020-10-15 23:33:50,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 23:33:50,950 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:50,951 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:33:51,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:51,151 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:33:51,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:51,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1733307105, now seen corresponding path program 51 times [2020-10-15 23:33:51,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:51,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012989697] [2020-10-15 23:33:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:51,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012989697] [2020-10-15 23:33:51,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376490356] [2020-10-15 23:33:51,243 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 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 [2020-10-15 23:33:51,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 23:33:51,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:33:51,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:33:51,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:51,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:51,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:33:51,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847656403] [2020-10-15 23:33:51,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:33:51,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:51,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:33:51,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:33:51,408 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:33:51,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 601 transitions, 31048 flow. Second operand 15 states. [2020-10-15 23:33:51,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:51,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:33:51,409 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:52,106 INFO L129 PetriNetUnfolder]: 444/1176 cut-off events. [2020-10-15 23:33:52,106 INFO L130 PetriNetUnfolder]: For 222466/222472 co-relation queries the response was YES. [2020-10-15 23:33:52,122 INFO L80 FinitePrefix]: Finished finitePrefix Result has 23336 conditions, 1176 events. 444/1176 cut-off events. For 222466/222472 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 9633 event pairs, 0 based on Foata normal form. 7/1183 useless extension candidates. Maximal degree in co-relation 23152. Up to 743 conditions per place. [2020-10-15 23:33:52,134 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 552 selfloop transitions, 92 changer transitions 0/651 dead transitions. [2020-10-15 23:33:52,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 651 transitions, 34324 flow [2020-10-15 23:33:52,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 23:33:52,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 23:33:52,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1083 transitions. [2020-10-15 23:33:52,136 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6747663551401869 [2020-10-15 23:33:52,136 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1083 transitions. [2020-10-15 23:33:52,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1083 transitions. [2020-10-15 23:33:52,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:52,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1083 transitions. [2020-10-15 23:33:52,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-15 23:33:52,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-15 23:33:52,137 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-15 23:33:52,137 INFO L185 Difference]: Start difference. First operand has 439 places, 601 transitions, 31048 flow. Second operand 15 states and 1083 transitions. [2020-10-15 23:33:52,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 651 transitions, 34324 flow [2020-10-15 23:33:53,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 651 transitions, 33846 flow, removed 198 selfloop flow, removed 12 redundant places. [2020-10-15 23:33:53,160 INFO L241 Difference]: Finished difference. Result has 445 places, 625 transitions, 32277 flow [2020-10-15 23:33:53,161 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=30607, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=32277, PETRI_PLACES=445, PETRI_TRANSITIONS=625} [2020-10-15 23:33:53,162 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 427 predicate places. [2020-10-15 23:33:53,162 INFO L481 AbstractCegarLoop]: Abstraction has has 445 places, 625 transitions, 32277 flow [2020-10-15 23:33:53,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:33:53,162 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:53,162 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:33:53,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:53,376 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:33:53,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:53,377 INFO L82 PathProgramCache]: Analyzing trace with hash 817422343, now seen corresponding path program 52 times [2020-10-15 23:33:53,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:53,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508156899] [2020-10-15 23:33:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:53,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508156899] [2020-10-15 23:33:53,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115187538] [2020-10-15 23:33:53,454 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 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 [2020-10-15 23:33:53,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:33:53,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:33:53,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:33:53,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:53,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:53,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:33:53,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284926118] [2020-10-15 23:33:53,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:33:53,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:53,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:33:53,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:33:53,634 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:33:53,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 625 transitions, 32277 flow. Second operand 15 states. [2020-10-15 23:33:53,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:53,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:33:53,634 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:54,386 INFO L129 PetriNetUnfolder]: 450/1193 cut-off events. [2020-10-15 23:33:54,387 INFO L130 PetriNetUnfolder]: For 232782/232784 co-relation queries the response was YES. [2020-10-15 23:33:54,403 INFO L80 FinitePrefix]: Finished finitePrefix Result has 23628 conditions, 1193 events. 450/1193 cut-off events. For 232782/232784 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 9687 event pairs, 0 based on Foata normal form. 3/1196 useless extension candidates. Maximal degree in co-relation 23439. Up to 763 conditions per place. [2020-10-15 23:33:54,415 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 562 selfloop transitions, 84 changer transitions 0/653 dead transitions. [2020-10-15 23:33:54,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 653 transitions, 34642 flow [2020-10-15 23:33:54,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 23:33:54,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 23:33:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1083 transitions. [2020-10-15 23:33:54,417 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6747663551401869 [2020-10-15 23:33:54,417 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1083 transitions. [2020-10-15 23:33:54,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1083 transitions. [2020-10-15 23:33:54,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:54,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1083 transitions. [2020-10-15 23:33:54,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-15 23:33:54,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-15 23:33:54,419 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-15 23:33:54,419 INFO L185 Difference]: Start difference. First operand has 445 places, 625 transitions, 32277 flow. Second operand 15 states and 1083 transitions. [2020-10-15 23:33:54,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 653 transitions, 34642 flow [2020-10-15 23:33:55,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 653 transitions, 34568 flow, removed 0 selfloop flow, removed 9 redundant places. [2020-10-15 23:33:55,350 INFO L241 Difference]: Finished difference. Result has 453 places, 635 transitions, 33137 flow [2020-10-15 23:33:55,351 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=32204, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=33137, PETRI_PLACES=453, PETRI_TRANSITIONS=635} [2020-10-15 23:33:55,351 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 435 predicate places. [2020-10-15 23:33:55,351 INFO L481 AbstractCegarLoop]: Abstraction has has 453 places, 635 transitions, 33137 flow [2020-10-15 23:33:55,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:33:55,351 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:55,351 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:33:55,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-15 23:33:55,552 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:33:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:55,552 INFO L82 PathProgramCache]: Analyzing trace with hash -703011396, now seen corresponding path program 53 times [2020-10-15 23:33:55,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:55,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27846914] [2020-10-15 23:33:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:55,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27846914] [2020-10-15 23:33:55,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376908476] [2020-10-15 23:33:55,635 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 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 [2020-10-15 23:33:55,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:33:55,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:33:55,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:33:55,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:55,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:33:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:55,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:55,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:33:55,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747110040] [2020-10-15 23:33:55,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:33:55,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:55,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:33:55,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:33:55,811 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:33:55,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 635 transitions, 33137 flow. Second operand 15 states. [2020-10-15 23:33:55,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:55,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:33:55,812 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:57,197 INFO L129 PetriNetUnfolder]: 467/1239 cut-off events. [2020-10-15 23:33:57,197 INFO L130 PetriNetUnfolder]: For 259656/259662 co-relation queries the response was YES. [2020-10-15 23:33:57,213 INFO L80 FinitePrefix]: Finished finitePrefix Result has 25097 conditions, 1239 events. 467/1239 cut-off events. For 259656/259662 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 10318 event pairs, 0 based on Foata normal form. 9/1248 useless extension candidates. Maximal degree in co-relation 24905. Up to 767 conditions per place. [2020-10-15 23:33:57,226 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 496 selfloop transitions, 162 changer transitions 0/665 dead transitions. [2020-10-15 23:33:57,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 665 transitions, 36856 flow [2020-10-15 23:33:57,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 23:33:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 23:33:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1670 transitions. [2020-10-15 23:33:57,233 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785859406745226 [2020-10-15 23:33:57,233 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1670 transitions. [2020-10-15 23:33:57,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1670 transitions. [2020-10-15 23:33:57,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:33:57,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1670 transitions. [2020-10-15 23:33:57,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-15 23:33:57,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-15 23:33:57,237 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-15 23:33:57,237 INFO L185 Difference]: Start difference. First operand has 453 places, 635 transitions, 33137 flow. Second operand 23 states and 1670 transitions. [2020-10-15 23:33:57,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 665 transitions, 36856 flow [2020-10-15 23:33:58,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 665 transitions, 36744 flow, removed 12 selfloop flow, removed 10 redundant places. [2020-10-15 23:33:58,303 INFO L241 Difference]: Finished difference. Result has 468 places, 661 transitions, 35757 flow [2020-10-15 23:33:58,304 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=33027, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=35757, PETRI_PLACES=468, PETRI_TRANSITIONS=661} [2020-10-15 23:33:58,304 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 450 predicate places. [2020-10-15 23:33:58,304 INFO L481 AbstractCegarLoop]: Abstraction has has 468 places, 661 transitions, 35757 flow [2020-10-15 23:33:58,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:33:58,304 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:33:58,304 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:33:58,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:33:58,511 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:33:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:33:58,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1089668533, now seen corresponding path program 54 times [2020-10-15 23:33:58,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:33:58,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002056780] [2020-10-15 23:33:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:33:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:33:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:58,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002056780] [2020-10-15 23:33:58,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491186768] [2020-10-15 23:33:58,592 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 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 [2020-10-15 23:33:58,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 23:33:58,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:33:58,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:33:58,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:33:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:33:58,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:33:58,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:33:58,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841461534] [2020-10-15 23:33:58,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:33:58,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:33:58,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:33:58,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:33:58,789 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:33:58,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 661 transitions, 35757 flow. Second operand 15 states. [2020-10-15 23:33:58,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:33:58,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:33:58,790 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:33:59,966 INFO L129 PetriNetUnfolder]: 479/1276 cut-off events. [2020-10-15 23:33:59,966 INFO L130 PetriNetUnfolder]: For 270799/270801 co-relation queries the response was YES. [2020-10-15 23:33:59,985 INFO L80 FinitePrefix]: Finished finitePrefix Result has 26238 conditions, 1276 events. 479/1276 cut-off events. For 270799/270801 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 10598 event pairs, 0 based on Foata normal form. 3/1279 useless extension candidates. Maximal degree in co-relation 26043. Up to 656 conditions per place. [2020-10-15 23:33:59,998 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 426 selfloop transitions, 261 changer transitions 0/694 dead transitions. [2020-10-15 23:33:59,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 694 transitions, 38603 flow [2020-10-15 23:33:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 23:33:59,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 23:34:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1667 transitions. [2020-10-15 23:34:00,000 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6773669240146282 [2020-10-15 23:34:00,000 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1667 transitions. [2020-10-15 23:34:00,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1667 transitions. [2020-10-15 23:34:00,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:34:00,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1667 transitions. [2020-10-15 23:34:00,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-15 23:34:00,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-15 23:34:00,003 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-15 23:34:00,003 INFO L185 Difference]: Start difference. First operand has 468 places, 661 transitions, 35757 flow. Second operand 23 states and 1667 transitions. [2020-10-15 23:34:00,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 694 transitions, 38603 flow [2020-10-15 23:34:01,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 694 transitions, 37566 flow, removed 448 selfloop flow, removed 14 redundant places. [2020-10-15 23:34:01,363 INFO L241 Difference]: Finished difference. Result has 477 places, 675 transitions, 36492 flow [2020-10-15 23:34:01,363 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=34734, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=36492, PETRI_PLACES=477, PETRI_TRANSITIONS=675} [2020-10-15 23:34:01,363 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 459 predicate places. [2020-10-15 23:34:01,364 INFO L481 AbstractCegarLoop]: Abstraction has has 477 places, 675 transitions, 36492 flow [2020-10-15 23:34:01,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:34:01,364 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:34:01,364 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:34:01,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-15 23:34:01,565 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:34:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:34:01,565 INFO L82 PathProgramCache]: Analyzing trace with hash -703694884, now seen corresponding path program 55 times [2020-10-15 23:34:01,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:34:01,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117723269] [2020-10-15 23:34:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:34:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:34:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:01,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117723269] [2020-10-15 23:34:01,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254132666] [2020-10-15 23:34:01,645 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 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 [2020-10-15 23:34:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:34:01,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:34:01,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:34:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:01,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:34:01,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:34:01,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493624605] [2020-10-15 23:34:01,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:34:01,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:34:01,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:34:01,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:34:01,858 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:34:01,858 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 675 transitions, 36492 flow. Second operand 15 states. [2020-10-15 23:34:01,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:34:01,859 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:34:01,859 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:34:02,956 INFO L129 PetriNetUnfolder]: 483/1287 cut-off events. [2020-10-15 23:34:02,956 INFO L130 PetriNetUnfolder]: For 272476/272482 co-relation queries the response was YES. [2020-10-15 23:34:02,975 INFO L80 FinitePrefix]: Finished finitePrefix Result has 26557 conditions, 1287 events. 483/1287 cut-off events. For 272476/272482 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 10837 event pairs, 0 based on Foata normal form. 7/1294 useless extension candidates. Maximal degree in co-relation 26360. Up to 695 conditions per place. [2020-10-15 23:34:02,989 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 467 selfloop transitions, 225 changer transitions 0/699 dead transitions. [2020-10-15 23:34:02,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 699 transitions, 38851 flow [2020-10-15 23:34:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 23:34:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-15 23:34:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1592 transitions. [2020-10-15 23:34:02,990 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6762956669498725 [2020-10-15 23:34:02,990 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1592 transitions. [2020-10-15 23:34:02,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1592 transitions. [2020-10-15 23:34:02,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:34:02,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1592 transitions. [2020-10-15 23:34:02,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-15 23:34:02,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-15 23:34:02,993 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-15 23:34:02,993 INFO L185 Difference]: Start difference. First operand has 477 places, 675 transitions, 36492 flow. Second operand 22 states and 1592 transitions. [2020-10-15 23:34:02,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 699 transitions, 38851 flow [2020-10-15 23:34:04,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 699 transitions, 38511 flow, removed 44 selfloop flow, removed 16 redundant places. [2020-10-15 23:34:04,110 INFO L241 Difference]: Finished difference. Result has 485 places, 681 transitions, 37427 flow [2020-10-15 23:34:04,111 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=36154, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=37427, PETRI_PLACES=485, PETRI_TRANSITIONS=681} [2020-10-15 23:34:04,111 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 467 predicate places. [2020-10-15 23:34:04,112 INFO L481 AbstractCegarLoop]: Abstraction has has 485 places, 681 transitions, 37427 flow [2020-10-15 23:34:04,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:34:04,112 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:34:04,112 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:34:04,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-15 23:34:04,313 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:34:04,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:34:04,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1845488847, now seen corresponding path program 56 times [2020-10-15 23:34:04,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:34:04,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623486790] [2020-10-15 23:34:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:34:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:34:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:04,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623486790] [2020-10-15 23:34:04,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562461796] [2020-10-15 23:34:04,390 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 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 [2020-10-15 23:34:04,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:34:04,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:34:04,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:34:04,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:34:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:04,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:34:04,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:34:04,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885106287] [2020-10-15 23:34:04,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:34:04,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:34:04,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:34:04,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:34:04,573 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:34:04,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 681 transitions, 37427 flow. Second operand 15 states. [2020-10-15 23:34:04,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:34:04,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:34:04,574 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:34:05,942 INFO L129 PetriNetUnfolder]: 488/1301 cut-off events. [2020-10-15 23:34:05,942 INFO L130 PetriNetUnfolder]: For 283991/283993 co-relation queries the response was YES. [2020-10-15 23:34:05,960 INFO L80 FinitePrefix]: Finished finitePrefix Result has 27099 conditions, 1301 events. 488/1301 cut-off events. For 283991/283993 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 10859 event pairs, 0 based on Foata normal form. 3/1304 useless extension candidates. Maximal degree in co-relation 26900. Up to 656 conditions per place. [2020-10-15 23:34:05,974 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 423 selfloop transitions, 283 changer transitions 0/713 dead transitions. [2020-10-15 23:34:05,974 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 713 transitions, 39875 flow [2020-10-15 23:34:05,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 23:34:05,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-15 23:34:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1882 transitions. [2020-10-15 23:34:05,976 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676491732566499 [2020-10-15 23:34:05,976 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1882 transitions. [2020-10-15 23:34:05,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1882 transitions. [2020-10-15 23:34:05,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:34:05,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1882 transitions. [2020-10-15 23:34:05,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-15 23:34:05,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-15 23:34:05,979 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-15 23:34:05,979 INFO L185 Difference]: Start difference. First operand has 485 places, 681 transitions, 37427 flow. Second operand 26 states and 1882 transitions. [2020-10-15 23:34:05,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 713 transitions, 39875 flow [2020-10-15 23:34:07,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 713 transitions, 39615 flow, removed 20 selfloop flow, removed 17 redundant places. [2020-10-15 23:34:07,194 INFO L241 Difference]: Finished difference. Result has 495 places, 691 transitions, 38513 flow [2020-10-15 23:34:07,195 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=37175, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=38513, PETRI_PLACES=495, PETRI_TRANSITIONS=691} [2020-10-15 23:34:07,195 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 477 predicate places. [2020-10-15 23:34:07,195 INFO L481 AbstractCegarLoop]: Abstraction has has 495 places, 691 transitions, 38513 flow [2020-10-15 23:34:07,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:34:07,196 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:34:07,196 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:34:07,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 23:34:07,403 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:34:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:34:07,403 INFO L82 PathProgramCache]: Analyzing trace with hash -703010435, now seen corresponding path program 57 times [2020-10-15 23:34:07,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:34:07,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836195535] [2020-10-15 23:34:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:34:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:34:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:07,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836195535] [2020-10-15 23:34:07,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307233967] [2020-10-15 23:34:07,486 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 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 [2020-10-15 23:34:07,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 23:34:07,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:34:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 23:34:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:34:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:07,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:34:07,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:34:07,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526701545] [2020-10-15 23:34:07,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:34:07,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:34:07,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:34:07,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:34:07,622 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:34:07,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 691 transitions, 38513 flow. Second operand 15 states. [2020-10-15 23:34:07,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:34:07,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:34:07,622 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:34:08,836 INFO L129 PetriNetUnfolder]: 502/1339 cut-off events. [2020-10-15 23:34:08,836 INFO L130 PetriNetUnfolder]: For 321125/321127 co-relation queries the response was YES. [2020-10-15 23:34:08,855 INFO L80 FinitePrefix]: Finished finitePrefix Result has 28817 conditions, 1339 events. 502/1339 cut-off events. For 321125/321127 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 11248 event pairs, 0 based on Foata normal form. 5/1344 useless extension candidates. Maximal degree in co-relation 28618. Up to 645 conditions per place. [2020-10-15 23:34:08,870 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 365 selfloop transitions, 344 changer transitions 0/716 dead transitions. [2020-10-15 23:34:08,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 716 transitions, 42348 flow [2020-10-15 23:34:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 23:34:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-15 23:34:08,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1815 transitions. [2020-10-15 23:34:08,872 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2020-10-15 23:34:08,872 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1815 transitions. [2020-10-15 23:34:08,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1815 transitions. [2020-10-15 23:34:08,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:34:08,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1815 transitions. [2020-10-15 23:34:08,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-15 23:34:08,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-15 23:34:08,874 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-15 23:34:08,874 INFO L185 Difference]: Start difference. First operand has 495 places, 691 transitions, 38513 flow. Second operand 25 states and 1815 transitions. [2020-10-15 23:34:08,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 716 transitions, 42348 flow [2020-10-15 23:34:10,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 716 transitions, 42154 flow, removed 52 selfloop flow, removed 16 redundant places. [2020-10-15 23:34:10,375 INFO L241 Difference]: Finished difference. Result has 506 places, 710 transitions, 41543 flow [2020-10-15 23:34:10,376 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=38319, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=41543, PETRI_PLACES=506, PETRI_TRANSITIONS=710} [2020-10-15 23:34:10,376 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 488 predicate places. [2020-10-15 23:34:10,376 INFO L481 AbstractCegarLoop]: Abstraction has has 506 places, 710 transitions, 41543 flow [2020-10-15 23:34:10,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:34:10,376 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:34:10,376 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:34:10,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:34:10,577 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:34:10,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:34:10,578 INFO L82 PathProgramCache]: Analyzing trace with hash -703002964, now seen corresponding path program 58 times [2020-10-15 23:34:10,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:34:10,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091475846] [2020-10-15 23:34:10,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:34:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:34:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:10,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091475846] [2020-10-15 23:34:10,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393371563] [2020-10-15 23:34:10,654 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 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 [2020-10-15 23:34:10,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:34:10,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:34:10,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:34:10,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:34:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:10,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:34:10,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:34:10,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276290986] [2020-10-15 23:34:10,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:34:10,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:34:10,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:34:10,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:34:10,863 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:34:10,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 710 transitions, 41543 flow. Second operand 15 states. [2020-10-15 23:34:10,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:34:10,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:34:10,864 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:34:12,199 INFO L129 PetriNetUnfolder]: 507/1352 cut-off events. [2020-10-15 23:34:12,199 INFO L130 PetriNetUnfolder]: For 326585/326591 co-relation queries the response was YES. [2020-10-15 23:34:12,219 INFO L80 FinitePrefix]: Finished finitePrefix Result has 29701 conditions, 1352 events. 507/1352 cut-off events. For 326585/326591 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 11498 event pairs, 0 based on Foata normal form. 7/1359 useless extension candidates. Maximal degree in co-relation 29498. Up to 685 conditions per place. [2020-10-15 23:34:12,233 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 442 selfloop transitions, 285 changer transitions 0/734 dead transitions. [2020-10-15 23:34:12,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 734 transitions, 43960 flow [2020-10-15 23:34:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 23:34:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-15 23:34:12,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1884 transitions. [2020-10-15 23:34:12,235 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6772106398274622 [2020-10-15 23:34:12,235 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1884 transitions. [2020-10-15 23:34:12,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1884 transitions. [2020-10-15 23:34:12,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:34:12,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1884 transitions. [2020-10-15 23:34:12,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-15 23:34:12,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-15 23:34:12,238 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-15 23:34:12,238 INFO L185 Difference]: Start difference. First operand has 506 places, 710 transitions, 41543 flow. Second operand 26 states and 1884 transitions. [2020-10-15 23:34:12,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 734 transitions, 43960 flow [2020-10-15 23:34:13,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 734 transitions, 42245 flow, removed 773 selfloop flow, removed 17 redundant places. [2020-10-15 23:34:13,585 INFO L241 Difference]: Finished difference. Result has 515 places, 715 transitions, 41134 flow [2020-10-15 23:34:13,586 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=39959, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=41134, PETRI_PLACES=515, PETRI_TRANSITIONS=715} [2020-10-15 23:34:13,586 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 497 predicate places. [2020-10-15 23:34:13,586 INFO L481 AbstractCegarLoop]: Abstraction has has 515 places, 715 transitions, 41134 flow [2020-10-15 23:34:13,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:34:13,587 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:34:13,587 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:34:13,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:34:13,787 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:34:13,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:34:13,788 INFO L82 PathProgramCache]: Analyzing trace with hash -508148465, now seen corresponding path program 59 times [2020-10-15 23:34:13,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:34:13,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390809562] [2020-10-15 23:34:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:34:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:34:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:13,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390809562] [2020-10-15 23:34:13,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273197408] [2020-10-15 23:34:13,870 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 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 [2020-10-15 23:34:13,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:34:13,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:34:13,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:34:13,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:34:14,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:34:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:14,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:34:14,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:34:14,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768271852] [2020-10-15 23:34:14,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:34:14,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:34:14,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:34:14,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:34:14,032 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:34:14,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 715 transitions, 41134 flow. Second operand 15 states. [2020-10-15 23:34:14,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:34:14,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:34:14,032 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:34:15,624 INFO L129 PetriNetUnfolder]: 516/1378 cut-off events. [2020-10-15 23:34:15,624 INFO L130 PetriNetUnfolder]: For 326727/326729 co-relation queries the response was YES. [2020-10-15 23:34:15,643 INFO L80 FinitePrefix]: Finished finitePrefix Result has 29581 conditions, 1378 events. 516/1378 cut-off events. For 326727/326729 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 11719 event pairs, 0 based on Foata normal form. 4/1382 useless extension candidates. Maximal degree in co-relation 29377. Up to 815 conditions per place. [2020-10-15 23:34:15,658 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 501 selfloop transitions, 224 changer transitions 0/732 dead transitions. [2020-10-15 23:34:15,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 732 transitions, 43992 flow [2020-10-15 23:34:15,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 23:34:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 23:34:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1959 transitions. [2020-10-15 23:34:15,660 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780893042575286 [2020-10-15 23:34:15,660 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1959 transitions. [2020-10-15 23:34:15,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1959 transitions. [2020-10-15 23:34:15,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:34:15,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1959 transitions. [2020-10-15 23:34:15,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-15 23:34:15,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-15 23:34:15,663 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-15 23:34:15,663 INFO L185 Difference]: Start difference. First operand has 515 places, 715 transitions, 41134 flow. Second operand 27 states and 1959 transitions. [2020-10-15 23:34:15,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 732 transitions, 43992 flow [2020-10-15 23:34:16,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 732 transitions, 43646 flow, removed 13 selfloop flow, removed 20 redundant places. [2020-10-15 23:34:17,028 INFO L241 Difference]: Finished difference. Result has 524 places, 728 transitions, 42589 flow [2020-10-15 23:34:17,028 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=40798, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=42589, PETRI_PLACES=524, PETRI_TRANSITIONS=728} [2020-10-15 23:34:17,029 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 506 predicate places. [2020-10-15 23:34:17,029 INFO L481 AbstractCegarLoop]: Abstraction has has 524 places, 728 transitions, 42589 flow [2020-10-15 23:34:17,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:34:17,029 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:34:17,029 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:34:17,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:34:17,230 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:34:17,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:34:17,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1846411407, now seen corresponding path program 60 times [2020-10-15 23:34:17,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:34:17,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476576580] [2020-10-15 23:34:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:34:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:34:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:17,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476576580] [2020-10-15 23:34:17,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373197398] [2020-10-15 23:34:17,309 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 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 [2020-10-15 23:34:17,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 23:34:17,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:34:17,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:34:17,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:34:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:17,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:34:17,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:34:17,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695894237] [2020-10-15 23:34:17,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:34:17,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:34:17,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:34:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:34:17,484 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:34:17,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 728 transitions, 42589 flow. Second operand 15 states. [2020-10-15 23:34:17,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:34:17,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:34:17,485 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:34:18,668 INFO L129 PetriNetUnfolder]: 526/1406 cut-off events. [2020-10-15 23:34:18,668 INFO L130 PetriNetUnfolder]: For 344742/344748 co-relation queries the response was YES. [2020-10-15 23:34:18,689 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30571 conditions, 1406 events. 526/1406 cut-off events. For 344742/344748 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 12066 event pairs, 0 based on Foata normal form. 7/1413 useless extension candidates. Maximal degree in co-relation 30366. Up to 647 conditions per place. [2020-10-15 23:34:18,704 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 410 selfloop transitions, 353 changer transitions 0/770 dead transitions. [2020-10-15 23:34:18,704 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 770 transitions, 45970 flow [2020-10-15 23:34:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 23:34:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-15 23:34:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1810 transitions. [2020-10-15 23:34:18,706 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6766355140186916 [2020-10-15 23:34:18,706 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1810 transitions. [2020-10-15 23:34:18,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1810 transitions. [2020-10-15 23:34:18,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:34:18,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1810 transitions. [2020-10-15 23:34:18,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-15 23:34:18,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-15 23:34:18,708 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-15 23:34:18,708 INFO L185 Difference]: Start difference. First operand has 524 places, 728 transitions, 42589 flow. Second operand 25 states and 1810 transitions. [2020-10-15 23:34:18,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 770 transitions, 45970 flow [2020-10-15 23:34:20,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 770 transitions, 45224 flow, removed 279 selfloop flow, removed 20 redundant places. [2020-10-15 23:34:20,401 INFO L241 Difference]: Finished difference. Result has 529 places, 741 transitions, 44068 flow [2020-10-15 23:34:20,402 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=41873, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=44068, PETRI_PLACES=529, PETRI_TRANSITIONS=741} [2020-10-15 23:34:20,402 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 511 predicate places. [2020-10-15 23:34:20,402 INFO L481 AbstractCegarLoop]: Abstraction has has 529 places, 741 transitions, 44068 flow [2020-10-15 23:34:20,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:34:20,402 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:34:20,402 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:34:20,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:34:20,603 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:34:20,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:34:20,604 INFO L82 PathProgramCache]: Analyzing trace with hash -702980644, now seen corresponding path program 61 times [2020-10-15 23:34:20,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:34:20,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670042471] [2020-10-15 23:34:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:34:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:34:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:20,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670042471] [2020-10-15 23:34:20,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16256033] [2020-10-15 23:34:20,683 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 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 [2020-10-15 23:34:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:34:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:34:20,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:34:20,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:34:20,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:34:20,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:34:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:34:22,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:34:22,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 23:34:22,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527551644] [2020-10-15 23:34:22,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 23:34:22,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:34:22,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 23:34:22,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2020-10-15 23:34:22,233 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:34:22,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 741 transitions, 44068 flow. Second operand 16 states. [2020-10-15 23:34:22,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:34:22,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:34:22,234 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:34:30,128 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-15 23:34:34,829 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-15 23:34:38,980 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-15 23:34:40,520 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 41 [2020-10-15 23:35:04,787 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 45 [2020-10-15 23:35:17,132 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-15 23:35:35,601 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 51 DAG size of output: 22 [2020-10-15 23:36:12,177 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 48 [2020-10-15 23:36:27,083 INFO L129 PetriNetUnfolder]: 533/1424 cut-off events. [2020-10-15 23:36:27,083 INFO L130 PetriNetUnfolder]: For 362530/362536 co-relation queries the response was YES. [2020-10-15 23:36:27,105 INFO L80 FinitePrefix]: Finished finitePrefix Result has 31503 conditions, 1424 events. 533/1424 cut-off events. For 362530/362536 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 12235 event pairs, 0 based on Foata normal form. 8/1432 useless extension candidates. Maximal degree in co-relation 31296. Up to 840 conditions per place. [2020-10-15 23:36:27,122 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 506 selfloop transitions, 249 changer transitions 0/762 dead transitions. [2020-10-15 23:36:27,122 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 762 transitions, 47081 flow [2020-10-15 23:36:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 23:36:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-15 23:36:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2825 transitions. [2020-10-15 23:36:27,125 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6769710040738078 [2020-10-15 23:36:27,125 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2825 transitions. [2020-10-15 23:36:27,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2825 transitions. [2020-10-15 23:36:27,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:36:27,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2825 transitions. [2020-10-15 23:36:27,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 40 states. [2020-10-15 23:36:27,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 40 states. [2020-10-15 23:36:27,128 INFO L81 ComplementDD]: Finished complementDD. Result 40 states. [2020-10-15 23:36:27,128 INFO L185 Difference]: Start difference. First operand has 529 places, 741 transitions, 44068 flow. Second operand 39 states and 2825 transitions. [2020-10-15 23:36:27,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 762 transitions, 47081 flow [2020-10-15 23:36:28,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 762 transitions, 46932 flow, removed 14 selfloop flow, removed 17 redundant places. [2020-10-15 23:36:28,737 INFO L241 Difference]: Finished difference. Result has 554 places, 752 transitions, 45834 flow [2020-10-15 23:36:28,738 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=43919, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=45834, PETRI_PLACES=554, PETRI_TRANSITIONS=752} [2020-10-15 23:36:28,738 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 536 predicate places. [2020-10-15 23:36:28,738 INFO L481 AbstractCegarLoop]: Abstraction has has 554 places, 752 transitions, 45834 flow [2020-10-15 23:36:28,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 23:36:28,738 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:36:28,739 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:36:28,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-10-15 23:36:28,939 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:36:28,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:36:28,942 INFO L82 PathProgramCache]: Analyzing trace with hash -501862564, now seen corresponding path program 62 times [2020-10-15 23:36:28,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:36:28,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391181133] [2020-10-15 23:36:28,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:36:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:36:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:36:29,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391181133] [2020-10-15 23:36:29,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27286349] [2020-10-15 23:36:29,047 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 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 [2020-10-15 23:36:29,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:36:29,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:36:29,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:36:29,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:36:29,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:36:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:36:29,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:36:29,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:36:29,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592628376] [2020-10-15 23:36:29,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:36:29,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:36:29,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:36:29,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:36:29,279 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:36:29,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 752 transitions, 45834 flow. Second operand 15 states. [2020-10-15 23:36:29,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:36:29,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:36:29,280 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:36:31,320 INFO L129 PetriNetUnfolder]: 542/1448 cut-off events. [2020-10-15 23:36:31,320 INFO L130 PetriNetUnfolder]: For 379013/379019 co-relation queries the response was YES. [2020-10-15 23:36:31,343 INFO L80 FinitePrefix]: Finished finitePrefix Result has 32599 conditions, 1448 events. 542/1448 cut-off events. For 379013/379019 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 12518 event pairs, 0 based on Foata normal form. 8/1456 useless extension candidates. Maximal degree in co-relation 32388. Up to 866 conditions per place. [2020-10-15 23:36:31,360 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 563 selfloop transitions, 202 changer transitions 0/772 dead transitions. [2020-10-15 23:36:31,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 772 transitions, 48798 flow [2020-10-15 23:36:31,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 23:36:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 23:36:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1669 transitions. [2020-10-15 23:36:31,362 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.678179601787891 [2020-10-15 23:36:31,362 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1669 transitions. [2020-10-15 23:36:31,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1669 transitions. [2020-10-15 23:36:31,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:36:31,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1669 transitions. [2020-10-15 23:36:31,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-15 23:36:31,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-15 23:36:31,364 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-15 23:36:31,364 INFO L185 Difference]: Start difference. First operand has 554 places, 752 transitions, 45834 flow. Second operand 23 states and 1669 transitions. [2020-10-15 23:36:31,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 772 transitions, 48798 flow [2020-10-15 23:36:33,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 772 transitions, 47266 flow, removed 532 selfloop flow, removed 31 redundant places. [2020-10-15 23:36:33,059 INFO L241 Difference]: Finished difference. Result has 548 places, 764 transitions, 46062 flow [2020-10-15 23:36:33,060 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=44305, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=46062, PETRI_PLACES=548, PETRI_TRANSITIONS=764} [2020-10-15 23:36:33,060 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 530 predicate places. [2020-10-15 23:36:33,060 INFO L481 AbstractCegarLoop]: Abstraction has has 548 places, 764 transitions, 46062 flow [2020-10-15 23:36:33,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:36:33,060 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:36:33,060 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:36:33,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:36:33,261 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:36:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:36:33,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1847096817, now seen corresponding path program 63 times [2020-10-15 23:36:33,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:36:33,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253703722] [2020-10-15 23:36:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:36:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:36:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:36:33,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253703722] [2020-10-15 23:36:33,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261184093] [2020-10-15 23:36:33,371 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:36:33,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 23:36:33,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:36:33,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:36:33,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:36:33,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:36:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:36:33,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:36:33,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:36:33,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441442923] [2020-10-15 23:36:33,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:36:33,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:36:33,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:36:33,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:36:33,569 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:36:33,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 764 transitions, 46062 flow. Second operand 15 states. [2020-10-15 23:36:33,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:36:33,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:36:33,570 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:36:35,528 INFO L129 PetriNetUnfolder]: 555/1483 cut-off events. [2020-10-15 23:36:35,528 INFO L130 PetriNetUnfolder]: For 409197/409203 co-relation queries the response was YES. [2020-10-15 23:36:35,553 INFO L80 FinitePrefix]: Finished finitePrefix Result has 33574 conditions, 1483 events. 555/1483 cut-off events. For 409197/409203 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 12866 event pairs, 0 based on Foata normal form. 9/1492 useless extension candidates. Maximal degree in co-relation 33360. Up to 558 conditions per place. [2020-10-15 23:36:35,571 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 187 selfloop transitions, 592 changer transitions 0/786 dead transitions. [2020-10-15 23:36:35,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 786 transitions, 49981 flow [2020-10-15 23:36:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 23:36:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-15 23:36:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2250 transitions. [2020-10-15 23:36:35,574 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783237865541152 [2020-10-15 23:36:35,575 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2250 transitions. [2020-10-15 23:36:35,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2250 transitions. [2020-10-15 23:36:35,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:36:35,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2250 transitions. [2020-10-15 23:36:35,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-15 23:36:35,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-15 23:36:35,580 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-15 23:36:35,580 INFO L185 Difference]: Start difference. First operand has 548 places, 764 transitions, 46062 flow. Second operand 31 states and 2250 transitions. [2020-10-15 23:36:35,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 786 transitions, 49981 flow [2020-10-15 23:36:37,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 786 transitions, 49341 flow, removed 246 selfloop flow, removed 19 redundant places. [2020-10-15 23:36:37,467 INFO L241 Difference]: Finished difference. Result has 562 places, 782 transitions, 49292 flow [2020-10-15 23:36:37,468 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=45422, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=578, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=49292, PETRI_PLACES=562, PETRI_TRANSITIONS=782} [2020-10-15 23:36:37,468 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 544 predicate places. [2020-10-15 23:36:37,468 INFO L481 AbstractCegarLoop]: Abstraction has has 562 places, 782 transitions, 49292 flow [2020-10-15 23:36:37,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:36:37,468 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:36:37,468 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:36:37,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:36:37,669 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:36:37,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:36:37,670 INFO L82 PathProgramCache]: Analyzing trace with hash -702981605, now seen corresponding path program 64 times [2020-10-15 23:36:37,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:36:37,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382223543] [2020-10-15 23:36:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:36:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:36:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:36:37,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382223543] [2020-10-15 23:36:37,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084737334] [2020-10-15 23:36:37,788 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:36:37,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:36:37,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:36:37,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:36:37,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:36:40,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:36:46,246 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 42 DAG size of output: 20 [2020-10-15 23:36:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:36:46,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:36:46,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 23:36:46,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990989010] [2020-10-15 23:36:46,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 23:36:46,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:36:46,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 23:36:46,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=178, Unknown=2, NotChecked=0, Total=240 [2020-10-15 23:36:46,251 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:36:46,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 782 transitions, 49292 flow. Second operand 16 states. [2020-10-15 23:36:46,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:36:46,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:36:46,252 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:36:50,424 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-15 23:36:54,663 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-15 23:36:59,187 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 23:37:09,581 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 23:37:11,728 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-15 23:37:24,177 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-15 23:37:39,485 INFO L129 PetriNetUnfolder]: 576/1544 cut-off events. [2020-10-15 23:37:39,486 INFO L130 PetriNetUnfolder]: For 440539/440541 co-relation queries the response was YES. [2020-10-15 23:37:39,511 INFO L80 FinitePrefix]: Finished finitePrefix Result has 36112 conditions, 1544 events. 576/1544 cut-off events. For 440539/440541 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 13338 event pairs, 0 based on Foata normal form. 5/1549 useless extension candidates. Maximal degree in co-relation 35894. Up to 796 conditions per place. [2020-10-15 23:37:39,529 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 415 selfloop transitions, 395 changer transitions 0/817 dead transitions. [2020-10-15 23:37:39,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 817 transitions, 54089 flow [2020-10-15 23:37:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 23:37:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-15 23:37:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2249 transitions. [2020-10-15 23:37:39,532 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780223093156467 [2020-10-15 23:37:39,532 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2249 transitions. [2020-10-15 23:37:39,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2249 transitions. [2020-10-15 23:37:39,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:37:39,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2249 transitions. [2020-10-15 23:37:39,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-15 23:37:39,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-15 23:37:39,536 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-15 23:37:39,536 INFO L185 Difference]: Start difference. First operand has 562 places, 782 transitions, 49292 flow. Second operand 31 states and 2249 transitions. [2020-10-15 23:37:39,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 817 transitions, 54089 flow [2020-10-15 23:37:41,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 817 transitions, 51424 flow, removed 1076 selfloop flow, removed 29 redundant places. [2020-10-15 23:37:41,558 INFO L241 Difference]: Finished difference. Result has 567 places, 811 transitions, 50669 flow [2020-10-15 23:37:41,559 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=46661, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=50669, PETRI_PLACES=567, PETRI_TRANSITIONS=811} [2020-10-15 23:37:41,559 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 549 predicate places. [2020-10-15 23:37:41,559 INFO L481 AbstractCegarLoop]: Abstraction has has 567 places, 811 transitions, 50669 flow [2020-10-15 23:37:41,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 23:37:41,560 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:37:41,560 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:37:41,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:37:41,760 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:37:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:37:41,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1846202126, now seen corresponding path program 65 times [2020-10-15 23:37:41,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:37:41,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951031673] [2020-10-15 23:37:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:37:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:37:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:37:41,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951031673] [2020-10-15 23:37:41,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960372515] [2020-10-15 23:37:41,877 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:37:41,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 23:37:41,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:37:41,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:37:41,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:37:42,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:37:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:37:42,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:37:42,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:37:42,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987264611] [2020-10-15 23:37:42,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:37:42,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:37:42,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:37:42,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:37:42,144 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:37:42,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 811 transitions, 50669 flow. Second operand 15 states. [2020-10-15 23:37:42,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:37:42,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:37:42,145 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:37:44,310 INFO L129 PetriNetUnfolder]: 586/1572 cut-off events. [2020-10-15 23:37:44,310 INFO L130 PetriNetUnfolder]: For 421261/421267 co-relation queries the response was YES. [2020-10-15 23:37:44,335 INFO L80 FinitePrefix]: Finished finitePrefix Result has 35592 conditions, 1572 events. 586/1572 cut-off events. For 421261/421267 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 13730 event pairs, 0 based on Foata normal form. 8/1580 useless extension candidates. Maximal degree in co-relation 35376. Up to 779 conditions per place. [2020-10-15 23:37:44,353 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 391 selfloop transitions, 432 changer transitions 0/830 dead transitions. [2020-10-15 23:37:44,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 830 transitions, 54006 flow [2020-10-15 23:37:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 23:37:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-15 23:37:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2249 transitions. [2020-10-15 23:37:44,355 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780223093156467 [2020-10-15 23:37:44,355 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2249 transitions. [2020-10-15 23:37:44,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2249 transitions. [2020-10-15 23:37:44,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:37:44,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2249 transitions. [2020-10-15 23:37:44,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-15 23:37:44,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-15 23:37:44,359 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-15 23:37:44,359 INFO L185 Difference]: Start difference. First operand has 567 places, 811 transitions, 50669 flow. Second operand 31 states and 2249 transitions. [2020-10-15 23:37:44,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 830 transitions, 54006 flow [2020-10-15 23:37:46,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 830 transitions, 53174 flow, removed 302 selfloop flow, removed 22 redundant places. [2020-10-15 23:37:46,253 INFO L241 Difference]: Finished difference. Result has 578 places, 824 transitions, 52388 flow [2020-10-15 23:37:46,254 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=49883, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=52388, PETRI_PLACES=578, PETRI_TRANSITIONS=824} [2020-10-15 23:37:46,254 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 560 predicate places. [2020-10-15 23:37:46,254 INFO L481 AbstractCegarLoop]: Abstraction has has 578 places, 824 transitions, 52388 flow [2020-10-15 23:37:46,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:37:46,255 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:37:46,255 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:37:46,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:37:46,470 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:37:46,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:37:46,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1847095856, now seen corresponding path program 66 times [2020-10-15 23:37:46,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:37:46,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478567659] [2020-10-15 23:37:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:37:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:37:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:37:46,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478567659] [2020-10-15 23:37:46,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997456501] [2020-10-15 23:37:46,585 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:37:46,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 23:37:46,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:37:46,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:37:46,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:37:46,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:37:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:37:46,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:37:46,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:37:46,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575265802] [2020-10-15 23:37:46,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:37:46,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:37:46,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:37:46,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:37:46,796 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:37:46,796 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 824 transitions, 52388 flow. Second operand 15 states. [2020-10-15 23:37:46,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:37:46,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:37:46,797 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:37:48,812 INFO L129 PetriNetUnfolder]: 590/1579 cut-off events. [2020-10-15 23:37:48,813 INFO L130 PetriNetUnfolder]: For 431490/431492 co-relation queries the response was YES. [2020-10-15 23:37:48,838 INFO L80 FinitePrefix]: Finished finitePrefix Result has 36256 conditions, 1579 events. 590/1579 cut-off events. For 431490/431492 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 13707 event pairs, 0 based on Foata normal form. 4/1583 useless extension candidates. Maximal degree in co-relation 36036. Up to 843 conditions per place. [2020-10-15 23:37:48,856 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 442 selfloop transitions, 387 changer transitions 0/836 dead transitions. [2020-10-15 23:37:48,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 836 transitions, 54995 flow [2020-10-15 23:37:48,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 23:37:48,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-15 23:37:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2539 transitions. [2020-10-15 23:37:48,859 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6779706275033378 [2020-10-15 23:37:48,860 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2539 transitions. [2020-10-15 23:37:48,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2539 transitions. [2020-10-15 23:37:48,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:37:48,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2539 transitions. [2020-10-15 23:37:48,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-15 23:37:48,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-15 23:37:48,865 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-15 23:37:48,865 INFO L185 Difference]: Start difference. First operand has 578 places, 824 transitions, 52388 flow. Second operand 35 states and 2539 transitions. [2020-10-15 23:37:48,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 836 transitions, 54995 flow [2020-10-15 23:37:50,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 836 transitions, 54321 flow, removed 213 selfloop flow, removed 23 redundant places. [2020-10-15 23:37:50,969 INFO L241 Difference]: Finished difference. Result has 592 places, 832 transitions, 53399 flow [2020-10-15 23:37:50,970 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=51714, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=53399, PETRI_PLACES=592, PETRI_TRANSITIONS=832} [2020-10-15 23:37:50,970 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 574 predicate places. [2020-10-15 23:37:50,970 INFO L481 AbstractCegarLoop]: Abstraction has has 592 places, 832 transitions, 53399 flow [2020-10-15 23:37:50,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:37:50,970 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:37:50,970 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:37:51,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-15 23:37:51,171 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:37:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:37:51,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1847125647, now seen corresponding path program 67 times [2020-10-15 23:37:51,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:37:51,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671224877] [2020-10-15 23:37:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:37:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:37:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:37:51,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671224877] [2020-10-15 23:37:51,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480898366] [2020-10-15 23:37:51,289 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:37:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:37:51,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 23:37:51,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:37:51,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:37:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:37:51,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:37:51,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 23:37:51,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586590073] [2020-10-15 23:37:51,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 23:37:51,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:37:51,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 23:37:51,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 23:37:51,503 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:37:51,503 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 832 transitions, 53399 flow. Second operand 15 states. [2020-10-15 23:37:51,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:37:51,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:37:51,503 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:37:53,504 INFO L129 PetriNetUnfolder]: 598/1602 cut-off events. [2020-10-15 23:37:53,504 INFO L130 PetriNetUnfolder]: For 440178/440184 co-relation queries the response was YES. [2020-10-15 23:37:53,530 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37284 conditions, 1602 events. 598/1602 cut-off events. For 440178/440184 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 14052 event pairs, 0 based on Foata normal form. 8/1610 useless extension candidates. Maximal degree in co-relation 37061. Up to 795 conditions per place. [2020-10-15 23:37:53,548 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 410 selfloop transitions, 435 changer transitions 0/852 dead transitions. [2020-10-15 23:37:53,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 852 transitions, 56724 flow [2020-10-15 23:37:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 23:37:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-15 23:37:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2249 transitions. [2020-10-15 23:37:53,551 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780223093156467 [2020-10-15 23:37:53,551 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2249 transitions. [2020-10-15 23:37:53,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2249 transitions. [2020-10-15 23:37:53,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:37:53,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2249 transitions. [2020-10-15 23:37:53,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-15 23:37:53,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-15 23:37:53,554 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-15 23:37:53,554 INFO L185 Difference]: Start difference. First operand has 592 places, 832 transitions, 53399 flow. Second operand 31 states and 2249 transitions. [2020-10-15 23:37:53,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 852 transitions, 56724 flow [2020-10-15 23:37:55,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 852 transitions, 55942 flow, removed 201 selfloop flow, removed 26 redundant places. [2020-10-15 23:37:55,573 INFO L241 Difference]: Finished difference. Result has 599 places, 844 transitions, 55001 flow [2020-10-15 23:37:55,574 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=52618, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=55001, PETRI_PLACES=599, PETRI_TRANSITIONS=844} [2020-10-15 23:37:55,574 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 581 predicate places. [2020-10-15 23:37:55,574 INFO L481 AbstractCegarLoop]: Abstraction has has 599 places, 844 transitions, 55001 flow [2020-10-15 23:37:55,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 23:37:55,574 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:37:55,574 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:37:55,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-15 23:37:55,775 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:37:55,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:37:55,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1018779712, now seen corresponding path program 17 times [2020-10-15 23:37:55,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:37:55,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141643620] [2020-10-15 23:37:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:37:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:37:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:37:55,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141643620] [2020-10-15 23:37:55,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689411880] [2020-10-15 23:37:55,901 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:37:55,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 23:37:55,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:37:55,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:37:55,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:37:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:37:56,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:37:56,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:37:56,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845080018] [2020-10-15 23:37:56,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:37:56,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:37:56,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:37:56,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:37:56,139 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:37:56,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 844 transitions, 55001 flow. Second operand 17 states. [2020-10-15 23:37:56,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:37:56,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:37:56,140 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:37:57,476 INFO L129 PetriNetUnfolder]: 600/1604 cut-off events. [2020-10-15 23:37:57,477 INFO L130 PetriNetUnfolder]: For 454933/454939 co-relation queries the response was YES. [2020-10-15 23:37:57,502 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37920 conditions, 1604 events. 600/1604 cut-off events. For 454933/454939 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 14052 event pairs, 0 based on Foata normal form. 8/1612 useless extension candidates. Maximal degree in co-relation 37694. Up to 1068 conditions per place. [2020-10-15 23:37:57,522 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 794 selfloop transitions, 65 changer transitions 0/866 dead transitions. [2020-10-15 23:37:57,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 866 transitions, 57466 flow [2020-10-15 23:37:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 23:37:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-15 23:37:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 939 transitions. [2020-10-15 23:37:57,524 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6750539180445723 [2020-10-15 23:37:57,524 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 939 transitions. [2020-10-15 23:37:57,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 939 transitions. [2020-10-15 23:37:57,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:37:57,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 939 transitions. [2020-10-15 23:37:57,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-15 23:37:57,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-15 23:37:57,525 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-15 23:37:57,525 INFO L185 Difference]: Start difference. First operand has 599 places, 844 transitions, 55001 flow. Second operand 13 states and 939 transitions. [2020-10-15 23:37:57,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 866 transitions, 57466 flow [2020-10-15 23:37:59,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 866 transitions, 56929 flow, removed 159 selfloop flow, removed 23 redundant places. [2020-10-15 23:37:59,579 INFO L241 Difference]: Finished difference. Result has 590 places, 846 transitions, 54836 flow [2020-10-15 23:37:59,580 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=54466, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=54836, PETRI_PLACES=590, PETRI_TRANSITIONS=846} [2020-10-15 23:37:59,580 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 572 predicate places. [2020-10-15 23:37:59,580 INFO L481 AbstractCegarLoop]: Abstraction has has 590 places, 846 transitions, 54836 flow [2020-10-15 23:37:59,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:37:59,580 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:37:59,580 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:37:59,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:37:59,781 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:37:59,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:37:59,782 INFO L82 PathProgramCache]: Analyzing trace with hash -501675386, now seen corresponding path program 18 times [2020-10-15 23:37:59,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:37:59,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656552040] [2020-10-15 23:37:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:37:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:37:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:37:59,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656552040] [2020-10-15 23:37:59,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413951249] [2020-10-15 23:37:59,909 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:37:59,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 23:37:59,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:37:59,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:37:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:38:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:00,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:38:00,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:38:00,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344513251] [2020-10-15 23:38:00,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:38:00,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:38:00,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:38:00,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:38:00,159 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:38:00,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 846 transitions, 54836 flow. Second operand 17 states. [2020-10-15 23:38:00,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:38:00,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:38:00,160 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:38:01,603 INFO L129 PetriNetUnfolder]: 602/1610 cut-off events. [2020-10-15 23:38:01,603 INFO L130 PetriNetUnfolder]: For 459303/459309 co-relation queries the response was YES. [2020-10-15 23:38:01,631 INFO L80 FinitePrefix]: Finished finitePrefix Result has 38081 conditions, 1610 events. 602/1610 cut-off events. For 459303/459309 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 14086 event pairs, 0 based on Foata normal form. 8/1618 useless extension candidates. Maximal degree in co-relation 37852. Up to 990 conditions per place. [2020-10-15 23:38:01,651 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 710 selfloop transitions, 147 changer transitions 0/864 dead transitions. [2020-10-15 23:38:01,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 864 transitions, 57293 flow [2020-10-15 23:38:01,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 23:38:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-15 23:38:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1160 transitions. [2020-10-15 23:38:01,653 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.677570093457944 [2020-10-15 23:38:01,653 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1160 transitions. [2020-10-15 23:38:01,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1160 transitions. [2020-10-15 23:38:01,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:38:01,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1160 transitions. [2020-10-15 23:38:01,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-15 23:38:01,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-15 23:38:01,655 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-15 23:38:01,655 INFO L185 Difference]: Start difference. First operand has 590 places, 846 transitions, 54836 flow. Second operand 16 states and 1160 transitions. [2020-10-15 23:38:01,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 864 transitions, 57293 flow [2020-10-15 23:38:03,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 864 transitions, 57210 flow, removed 5 selfloop flow, removed 9 redundant places. [2020-10-15 23:38:03,721 INFO L241 Difference]: Finished difference. Result has 597 places, 847 transitions, 55330 flow [2020-10-15 23:38:03,722 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=54755, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=55330, PETRI_PLACES=597, PETRI_TRANSITIONS=847} [2020-10-15 23:38:03,722 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 579 predicate places. [2020-10-15 23:38:03,722 INFO L481 AbstractCegarLoop]: Abstraction has has 597 places, 847 transitions, 55330 flow [2020-10-15 23:38:03,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:38:03,722 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:38:03,723 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:38:03,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:03,923 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:38:03,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:38:03,924 INFO L82 PathProgramCache]: Analyzing trace with hash -501653066, now seen corresponding path program 19 times [2020-10-15 23:38:03,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:38:03,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738049894] [2020-10-15 23:38:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:38:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:38:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:04,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738049894] [2020-10-15 23:38:04,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598072506] [2020-10-15 23:38:04,060 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:38:04,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:38:04,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:38:04,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:38:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:04,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:38:04,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:38:04,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066156987] [2020-10-15 23:38:04,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:38:04,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:38:04,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:38:04,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:38:04,376 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:38:04,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 847 transitions, 55330 flow. Second operand 17 states. [2020-10-15 23:38:04,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:38:04,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:38:04,377 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:38:05,799 INFO L129 PetriNetUnfolder]: 606/1620 cut-off events. [2020-10-15 23:38:05,799 INFO L130 PetriNetUnfolder]: For 463758/463764 co-relation queries the response was YES. [2020-10-15 23:38:05,826 INFO L80 FinitePrefix]: Finished finitePrefix Result has 38670 conditions, 1620 events. 606/1620 cut-off events. For 463758/463764 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 14197 event pairs, 0 based on Foata normal form. 8/1628 useless extension candidates. Maximal degree in co-relation 38440. Up to 1024 conditions per place. [2020-10-15 23:38:05,845 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 733 selfloop transitions, 124 changer transitions 0/864 dead transitions. [2020-10-15 23:38:05,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 864 transitions, 58514 flow [2020-10-15 23:38:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:38:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:38:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1234 transitions. [2020-10-15 23:38:05,848 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783947223749313 [2020-10-15 23:38:05,848 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1234 transitions. [2020-10-15 23:38:05,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1234 transitions. [2020-10-15 23:38:05,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:38:05,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1234 transitions. [2020-10-15 23:38:05,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:38:05,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:38:05,850 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:38:05,850 INFO L185 Difference]: Start difference. First operand has 597 places, 847 transitions, 55330 flow. Second operand 17 states and 1234 transitions. [2020-10-15 23:38:05,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 864 transitions, 58514 flow [2020-10-15 23:38:07,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 864 transitions, 58311 flow, removed 3 selfloop flow, removed 14 redundant places. [2020-10-15 23:38:07,953 INFO L241 Difference]: Finished difference. Result has 602 places, 855 transitions, 56598 flow [2020-10-15 23:38:07,954 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=55129, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=56598, PETRI_PLACES=602, PETRI_TRANSITIONS=855} [2020-10-15 23:38:07,954 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 584 predicate places. [2020-10-15 23:38:07,955 INFO L481 AbstractCegarLoop]: Abstraction has has 602 places, 855 transitions, 56598 flow [2020-10-15 23:38:07,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:38:07,955 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:38:07,955 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:38:08,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:08,169 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:38:08,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:38:08,169 INFO L82 PathProgramCache]: Analyzing trace with hash -792747351, now seen corresponding path program 68 times [2020-10-15 23:38:08,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:38:08,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030051860] [2020-10-15 23:38:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:38:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:38:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:08,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030051860] [2020-10-15 23:38:08,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542446831] [2020-10-15 23:38:08,363 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:08,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:38:08,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:38:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:38:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:38:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:08,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:38:08,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:38:08,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926055241] [2020-10-15 23:38:08,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:38:08,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:38:08,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:38:08,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:38:08,659 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:38:08,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 855 transitions, 56598 flow. Second operand 17 states. [2020-10-15 23:38:08,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:38:08,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:38:08,660 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:38:09,800 INFO L129 PetriNetUnfolder]: 607/1623 cut-off events. [2020-10-15 23:38:09,800 INFO L130 PetriNetUnfolder]: For 469120/469126 co-relation queries the response was YES. [2020-10-15 23:38:09,830 INFO L80 FinitePrefix]: Finished finitePrefix Result has 38957 conditions, 1623 events. 607/1623 cut-off events. For 469120/469126 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 14241 event pairs, 0 based on Foata normal form. 7/1630 useless extension candidates. Maximal degree in co-relation 38725. Up to 1031 conditions per place. [2020-10-15 23:38:09,851 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 752 selfloop transitions, 115 changer transitions 0/874 dead transitions. [2020-10-15 23:38:09,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 874 transitions, 58909 flow [2020-10-15 23:38:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 23:38:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-15 23:38:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 940 transitions. [2020-10-15 23:38:09,854 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757728253055356 [2020-10-15 23:38:09,854 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 940 transitions. [2020-10-15 23:38:09,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 940 transitions. [2020-10-15 23:38:09,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:38:09,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 940 transitions. [2020-10-15 23:38:09,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-15 23:38:09,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-15 23:38:09,856 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-15 23:38:09,856 INFO L185 Difference]: Start difference. First operand has 602 places, 855 transitions, 56598 flow. Second operand 13 states and 940 transitions. [2020-10-15 23:38:09,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 874 transitions, 58909 flow [2020-10-15 23:38:12,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 874 transitions, 57829 flow, removed 460 selfloop flow, removed 14 redundant places. [2020-10-15 23:38:12,113 INFO L241 Difference]: Finished difference. Result has 603 places, 858 transitions, 56067 flow [2020-10-15 23:38:12,114 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=55518, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=56067, PETRI_PLACES=603, PETRI_TRANSITIONS=858} [2020-10-15 23:38:12,114 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 585 predicate places. [2020-10-15 23:38:12,114 INFO L481 AbstractCegarLoop]: Abstraction has has 603 places, 858 transitions, 56067 flow [2020-10-15 23:38:12,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:38:12,114 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:38:12,114 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:38:12,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:12,315 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:38:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:38:12,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1124321181, now seen corresponding path program 69 times [2020-10-15 23:38:12,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:38:12,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452634022] [2020-10-15 23:38:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:38:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:38:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:12,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452634022] [2020-10-15 23:38:12,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545540044] [2020-10-15 23:38:12,496 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:12,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 23:38:12,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:38:12,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:38:12,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:38:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:18,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:38:18,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:38:18,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130077051] [2020-10-15 23:38:18,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:38:18,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:38:18,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:38:18,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-15 23:38:18,595 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:38:18,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 858 transitions, 56067 flow. Second operand 17 states. [2020-10-15 23:38:18,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:38:18,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:38:18,595 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:38:22,822 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 23:38:24,146 INFO L129 PetriNetUnfolder]: 608/1626 cut-off events. [2020-10-15 23:38:24,146 INFO L130 PetriNetUnfolder]: For 473815/473821 co-relation queries the response was YES. [2020-10-15 23:38:24,175 INFO L80 FinitePrefix]: Finished finitePrefix Result has 38666 conditions, 1626 events. 608/1626 cut-off events. For 473815/473821 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 14286 event pairs, 0 based on Foata normal form. 7/1633 useless extension candidates. Maximal degree in co-relation 38431. Up to 981 conditions per place. [2020-10-15 23:38:24,194 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 718 selfloop transitions, 162 changer transitions 0/887 dead transitions. [2020-10-15 23:38:24,195 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 887 transitions, 58653 flow [2020-10-15 23:38:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 23:38:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 23:38:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1084 transitions. [2020-10-15 23:38:24,196 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753894080996885 [2020-10-15 23:38:24,197 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1084 transitions. [2020-10-15 23:38:24,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1084 transitions. [2020-10-15 23:38:24,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:38:24,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1084 transitions. [2020-10-15 23:38:24,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-15 23:38:24,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-15 23:38:24,198 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-15 23:38:24,198 INFO L185 Difference]: Start difference. First operand has 603 places, 858 transitions, 56067 flow. Second operand 15 states and 1084 transitions. [2020-10-15 23:38:24,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 887 transitions, 58653 flow [2020-10-15 23:38:26,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 887 transitions, 58498 flow, removed 20 selfloop flow, removed 8 redundant places. [2020-10-15 23:38:26,371 INFO L241 Difference]: Finished difference. Result has 612 places, 862 transitions, 56630 flow [2020-10-15 23:38:26,372 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=55912, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=56630, PETRI_PLACES=612, PETRI_TRANSITIONS=862} [2020-10-15 23:38:26,372 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 594 predicate places. [2020-10-15 23:38:26,373 INFO L481 AbstractCegarLoop]: Abstraction has has 612 places, 862 transitions, 56630 flow [2020-10-15 23:38:26,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:38:26,373 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:38:26,373 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:38:26,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:26,573 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:38:26,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:38:26,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1124292351, now seen corresponding path program 70 times [2020-10-15 23:38:26,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:38:26,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697914529] [2020-10-15 23:38:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:38:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:38:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:26,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697914529] [2020-10-15 23:38:26,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382844464] [2020-10-15 23:38:26,741 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:26,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:38:26,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:38:26,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:38:26,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:38:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:27,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:38:27,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:38:27,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742905352] [2020-10-15 23:38:27,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:38:27,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:38:27,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:38:27,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:38:27,121 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:38:27,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 862 transitions, 56630 flow. Second operand 17 states. [2020-10-15 23:38:27,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:38:27,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:38:27,122 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:38:28,467 INFO L129 PetriNetUnfolder]: 610/1632 cut-off events. [2020-10-15 23:38:28,467 INFO L130 PetriNetUnfolder]: For 477416/477422 co-relation queries the response was YES. [2020-10-15 23:38:28,498 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39158 conditions, 1632 events. 610/1632 cut-off events. For 477416/477422 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 14354 event pairs, 0 based on Foata normal form. 7/1639 useless extension candidates. Maximal degree in co-relation 38920. Up to 981 conditions per place. [2020-10-15 23:38:28,517 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 717 selfloop transitions, 167 changer transitions 0/891 dead transitions. [2020-10-15 23:38:28,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 891 transitions, 59385 flow [2020-10-15 23:38:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 23:38:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 23:38:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1084 transitions. [2020-10-15 23:38:28,519 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6753894080996885 [2020-10-15 23:38:28,519 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1084 transitions. [2020-10-15 23:38:28,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1084 transitions. [2020-10-15 23:38:28,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:38:28,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1084 transitions. [2020-10-15 23:38:28,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-15 23:38:28,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-15 23:38:28,521 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-15 23:38:28,521 INFO L185 Difference]: Start difference. First operand has 612 places, 862 transitions, 56630 flow. Second operand 15 states and 1084 transitions. [2020-10-15 23:38:28,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 891 transitions, 59385 flow [2020-10-15 23:38:30,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 891 transitions, 59260 flow, removed 1 selfloop flow, removed 8 redundant places. [2020-10-15 23:38:30,870 INFO L241 Difference]: Finished difference. Result has 621 places, 866 transitions, 57408 flow [2020-10-15 23:38:30,871 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=56506, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=57408, PETRI_PLACES=621, PETRI_TRANSITIONS=866} [2020-10-15 23:38:30,871 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 603 predicate places. [2020-10-15 23:38:30,871 INFO L481 AbstractCegarLoop]: Abstraction has has 621 places, 866 transitions, 57408 flow [2020-10-15 23:38:30,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:38:30,872 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:38:30,872 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:38:31,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:31,086 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:38:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:38:31,086 INFO L82 PathProgramCache]: Analyzing trace with hash -781707383, now seen corresponding path program 71 times [2020-10-15 23:38:31,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:38:31,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817401545] [2020-10-15 23:38:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:38:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:38:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:31,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817401545] [2020-10-15 23:38:31,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233746107] [2020-10-15 23:38:31,307 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:31,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 23:38:31,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:38:31,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:38:31,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:38:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:31,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:38:31,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:38:31,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202564948] [2020-10-15 23:38:31,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:38:31,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:38:31,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:38:31,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:38:31,579 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:38:31,579 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 866 transitions, 57408 flow. Second operand 17 states. [2020-10-15 23:38:31,579 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:38:31,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:38:31,579 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:38:32,615 INFO L129 PetriNetUnfolder]: 611/1635 cut-off events. [2020-10-15 23:38:32,615 INFO L130 PetriNetUnfolder]: For 487417/487419 co-relation queries the response was YES. [2020-10-15 23:38:32,644 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39524 conditions, 1635 events. 611/1635 cut-off events. For 487417/487419 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 14337 event pairs, 0 based on Foata normal form. 3/1638 useless extension candidates. Maximal degree in co-relation 39283. Up to 1090 conditions per place. [2020-10-15 23:38:32,664 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 803 selfloop transitions, 64 changer transitions 0/874 dead transitions. [2020-10-15 23:38:32,664 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 874 transitions, 59551 flow [2020-10-15 23:38:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 23:38:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-15 23:38:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 796 transitions. [2020-10-15 23:38:32,666 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6762956669498725 [2020-10-15 23:38:32,666 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 796 transitions. [2020-10-15 23:38:32,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 796 transitions. [2020-10-15 23:38:32,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:38:32,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 796 transitions. [2020-10-15 23:38:32,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-15 23:38:32,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-15 23:38:32,668 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-15 23:38:32,668 INFO L185 Difference]: Start difference. First operand has 621 places, 866 transitions, 57408 flow. Second operand 11 states and 796 transitions. [2020-10-15 23:38:32,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 874 transitions, 59551 flow [2020-10-15 23:38:35,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 874 transitions, 59364 flow, removed 1 selfloop flow, removed 11 redundant places. [2020-10-15 23:38:35,054 INFO L241 Difference]: Finished difference. Result has 622 places, 868 transitions, 57601 flow [2020-10-15 23:38:35,055 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=57221, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=802, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=57601, PETRI_PLACES=622, PETRI_TRANSITIONS=868} [2020-10-15 23:38:35,055 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 604 predicate places. [2020-10-15 23:38:35,055 INFO L481 AbstractCegarLoop]: Abstraction has has 622 places, 868 transitions, 57601 flow [2020-10-15 23:38:35,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:38:35,055 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:38:35,055 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:38:35,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:35,256 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:38:35,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:38:35,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1263731241, now seen corresponding path program 72 times [2020-10-15 23:38:35,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:38:35,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876706338] [2020-10-15 23:38:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:38:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:38:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:35,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876706338] [2020-10-15 23:38:35,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817256418] [2020-10-15 23:38:35,398 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:35,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 23:38:35,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:38:35,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:38:35,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:38:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:35,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:38:35,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:38:35,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376663317] [2020-10-15 23:38:35,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:38:35,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:38:35,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:38:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:38:35,743 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:38:35,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 868 transitions, 57601 flow. Second operand 17 states. [2020-10-15 23:38:35,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:38:35,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:38:35,743 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:38:37,727 INFO L129 PetriNetUnfolder]: 616/1648 cut-off events. [2020-10-15 23:38:37,727 INFO L130 PetriNetUnfolder]: For 499709/499715 co-relation queries the response was YES. [2020-10-15 23:38:37,932 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39924 conditions, 1648 events. 616/1648 cut-off events. For 499709/499715 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 14552 event pairs, 0 based on Foata normal form. 7/1655 useless extension candidates. Maximal degree in co-relation 39681. Up to 941 conditions per place. [2020-10-15 23:38:37,956 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 658 selfloop transitions, 226 changer transitions 0/891 dead transitions. [2020-10-15 23:38:37,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 891 transitions, 60399 flow [2020-10-15 23:38:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:38:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:38:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1231 transitions. [2020-10-15 23:38:37,958 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6767454645409565 [2020-10-15 23:38:37,958 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1231 transitions. [2020-10-15 23:38:37,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1231 transitions. [2020-10-15 23:38:37,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:38:37,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1231 transitions. [2020-10-15 23:38:37,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:38:37,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:38:37,961 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:38:37,962 INFO L185 Difference]: Start difference. First operand has 622 places, 868 transitions, 57601 flow. Second operand 17 states and 1231 transitions. [2020-10-15 23:38:37,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 891 transitions, 60399 flow [2020-10-15 23:38:40,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 891 transitions, 60323 flow, removed 1 selfloop flow, removed 8 redundant places. [2020-10-15 23:38:40,482 INFO L241 Difference]: Finished difference. Result has 634 places, 876 transitions, 58775 flow [2020-10-15 23:38:40,483 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=57525, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=58775, PETRI_PLACES=634, PETRI_TRANSITIONS=876} [2020-10-15 23:38:40,483 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 616 predicate places. [2020-10-15 23:38:40,483 INFO L481 AbstractCegarLoop]: Abstraction has has 634 places, 876 transitions, 58775 flow [2020-10-15 23:38:40,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:38:40,483 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:38:40,483 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:38:40,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-15 23:38:40,684 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:38:40,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:38:40,685 INFO L82 PathProgramCache]: Analyzing trace with hash -172166041, now seen corresponding path program 73 times [2020-10-15 23:38:40,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:38:40,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816195901] [2020-10-15 23:38:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:38:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:38:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:40,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816195901] [2020-10-15 23:38:40,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509301681] [2020-10-15 23:38:40,844 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:38:40,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:38:40,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:38:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:41,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:38:41,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:38:41,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786589399] [2020-10-15 23:38:41,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:38:41,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:38:41,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:38:41,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:38:41,170 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:38:41,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 876 transitions, 58775 flow. Second operand 17 states. [2020-10-15 23:38:41,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:38:41,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:38:41,171 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:38:42,988 INFO L129 PetriNetUnfolder]: 618/1654 cut-off events. [2020-10-15 23:38:42,988 INFO L130 PetriNetUnfolder]: For 509090/509092 co-relation queries the response was YES. [2020-10-15 23:38:43,021 INFO L80 FinitePrefix]: Finished finitePrefix Result has 40579 conditions, 1654 events. 618/1654 cut-off events. For 509090/509092 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 14576 event pairs, 0 based on Foata normal form. 3/1657 useless extension candidates. Maximal degree in co-relation 40332. Up to 992 conditions per place. [2020-10-15 23:38:43,044 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 729 selfloop transitions, 171 changer transitions 0/907 dead transitions. [2020-10-15 23:38:43,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 907 transitions, 61640 flow [2020-10-15 23:38:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:38:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:38:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1228 transitions. [2020-10-15 23:38:43,047 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6750962067069819 [2020-10-15 23:38:43,047 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1228 transitions. [2020-10-15 23:38:43,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1228 transitions. [2020-10-15 23:38:43,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:38:43,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1228 transitions. [2020-10-15 23:38:43,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:38:43,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:38:43,050 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:38:43,050 INFO L185 Difference]: Start difference. First operand has 634 places, 876 transitions, 58775 flow. Second operand 17 states and 1228 transitions. [2020-10-15 23:38:43,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 907 transitions, 61640 flow [2020-10-15 23:38:45,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 907 transitions, 61333 flow, removed 46 selfloop flow, removed 11 redundant places. [2020-10-15 23:38:45,792 INFO L241 Difference]: Finished difference. Result has 642 places, 881 transitions, 59398 flow [2020-10-15 23:38:45,793 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=58468, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=59398, PETRI_PLACES=642, PETRI_TRANSITIONS=881} [2020-10-15 23:38:45,793 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 624 predicate places. [2020-10-15 23:38:45,793 INFO L481 AbstractCegarLoop]: Abstraction has has 642 places, 881 transitions, 59398 flow [2020-10-15 23:38:45,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:38:45,793 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:38:45,793 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:38:45,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:45,994 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:38:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:38:45,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1481791977, now seen corresponding path program 74 times [2020-10-15 23:38:45,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:38:45,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388057219] [2020-10-15 23:38:45,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:38:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:38:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:46,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388057219] [2020-10-15 23:38:46,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183548965] [2020-10-15 23:38:46,156 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:46,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:38:46,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:38:46,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:38:46,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:38:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:46,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:38:46,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:38:46,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749095774] [2020-10-15 23:38:46,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:38:46,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:38:46,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:38:46,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:38:46,457 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:38:46,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 881 transitions, 59398 flow. Second operand 17 states. [2020-10-15 23:38:46,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:38:46,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:38:46,458 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:38:48,222 INFO L129 PetriNetUnfolder]: 621/1663 cut-off events. [2020-10-15 23:38:48,222 INFO L130 PetriNetUnfolder]: For 525728/525734 co-relation queries the response was YES. [2020-10-15 23:38:48,252 INFO L80 FinitePrefix]: Finished finitePrefix Result has 41129 conditions, 1663 events. 621/1663 cut-off events. For 525728/525734 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 14726 event pairs, 0 based on Foata normal form. 7/1670 useless extension candidates. Maximal degree in co-relation 40880. Up to 988 conditions per place. [2020-10-15 23:38:48,275 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 722 selfloop transitions, 182 changer transitions 0/911 dead transitions. [2020-10-15 23:38:48,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 911 transitions, 62437 flow [2020-10-15 23:38:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:38:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:38:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1228 transitions. [2020-10-15 23:38:48,277 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6750962067069819 [2020-10-15 23:38:48,277 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1228 transitions. [2020-10-15 23:38:48,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1228 transitions. [2020-10-15 23:38:48,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:38:48,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1228 transitions. [2020-10-15 23:38:48,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:38:48,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:38:48,279 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:38:48,279 INFO L185 Difference]: Start difference. First operand has 642 places, 881 transitions, 59398 flow. Second operand 17 states and 1228 transitions. [2020-10-15 23:38:48,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 911 transitions, 62437 flow [2020-10-15 23:38:50,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 911 transitions, 62236 flow, removed 3 selfloop flow, removed 13 redundant places. [2020-10-15 23:38:51,034 INFO L241 Difference]: Finished difference. Result has 648 places, 887 transitions, 60356 flow [2020-10-15 23:38:51,035 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=59198, PETRI_DIFFERENCE_MINUEND_PLACES=629, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=60356, PETRI_PLACES=648, PETRI_TRANSITIONS=887} [2020-10-15 23:38:51,036 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 630 predicate places. [2020-10-15 23:38:51,036 INFO L481 AbstractCegarLoop]: Abstraction has has 648 places, 887 transitions, 60356 flow [2020-10-15 23:38:51,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:38:51,036 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:38:51,036 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:38:51,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-10-15 23:38:51,237 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:38:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:38:51,237 INFO L82 PathProgramCache]: Analyzing trace with hash -172135289, now seen corresponding path program 75 times [2020-10-15 23:38:51,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:38:51,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79418086] [2020-10-15 23:38:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:38:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:38:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:51,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79418086] [2020-10-15 23:38:51,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272990683] [2020-10-15 23:38:51,397 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:51,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 23:38:51,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:38:51,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:38:51,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:38:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:51,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:38:51,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:38:51,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322812019] [2020-10-15 23:38:51,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:38:51,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:38:51,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:38:51,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:38:51,755 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:38:51,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 648 places, 887 transitions, 60356 flow. Second operand 17 states. [2020-10-15 23:38:51,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:38:51,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:38:51,756 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:38:53,471 INFO L129 PetriNetUnfolder]: 622/1666 cut-off events. [2020-10-15 23:38:53,471 INFO L130 PetriNetUnfolder]: For 532802/532808 co-relation queries the response was YES. [2020-10-15 23:38:53,504 INFO L80 FinitePrefix]: Finished finitePrefix Result has 41489 conditions, 1666 events. 622/1666 cut-off events. For 532802/532808 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 14759 event pairs, 0 based on Foata normal form. 7/1673 useless extension candidates. Maximal degree in co-relation 41237. Up to 1057 conditions per place. [2020-10-15 23:38:53,525 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 775 selfloop transitions, 120 changer transitions 0/902 dead transitions. [2020-10-15 23:38:53,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 902 transitions, 62729 flow [2020-10-15 23:38:53,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 23:38:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-15 23:38:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1012 transitions. [2020-10-15 23:38:53,529 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755674232309746 [2020-10-15 23:38:53,529 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1012 transitions. [2020-10-15 23:38:53,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1012 transitions. [2020-10-15 23:38:53,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:38:53,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1012 transitions. [2020-10-15 23:38:53,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-15 23:38:53,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-15 23:38:53,531 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-15 23:38:53,531 INFO L185 Difference]: Start difference. First operand has 648 places, 887 transitions, 60356 flow. Second operand 14 states and 1012 transitions. [2020-10-15 23:38:53,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 902 transitions, 62729 flow [2020-10-15 23:38:56,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 648 places, 902 transitions, 62533 flow, removed 7 selfloop flow, removed 13 redundant places. [2020-10-15 23:38:56,415 INFO L241 Difference]: Finished difference. Result has 650 places, 889 transitions, 60706 flow [2020-10-15 23:38:56,416 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=60160, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=767, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=60706, PETRI_PLACES=650, PETRI_TRANSITIONS=889} [2020-10-15 23:38:56,416 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 632 predicate places. [2020-10-15 23:38:56,416 INFO L481 AbstractCegarLoop]: Abstraction has has 650 places, 889 transitions, 60706 flow [2020-10-15 23:38:56,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:38:56,417 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:38:56,417 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:38:56,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:56,618 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:38:56,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:38:56,618 INFO L82 PathProgramCache]: Analyzing trace with hash -85244318, now seen corresponding path program 76 times [2020-10-15 23:38:56,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:38:56,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851688891] [2020-10-15 23:38:56,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:38:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:38:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:56,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851688891] [2020-10-15 23:38:56,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212413162] [2020-10-15 23:38:56,758 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:38:56,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:38:56,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:38:56,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:38:56,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:38:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:38:57,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:38:57,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:38:57,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081079360] [2020-10-15 23:38:57,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:38:57,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:38:57,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:38:57,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:38:57,157 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:38:57,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 889 transitions, 60706 flow. Second operand 17 states. [2020-10-15 23:38:57,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:38:57,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:38:57,157 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:38:59,067 INFO L129 PetriNetUnfolder]: 625/1674 cut-off events. [2020-10-15 23:38:59,067 INFO L130 PetriNetUnfolder]: For 550664/550670 co-relation queries the response was YES. [2020-10-15 23:38:59,101 INFO L80 FinitePrefix]: Finished finitePrefix Result has 42018 conditions, 1674 events. 625/1674 cut-off events. For 550664/550670 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 14850 event pairs, 0 based on Foata normal form. 7/1681 useless extension candidates. Maximal degree in co-relation 41764. Up to 918 conditions per place. [2020-10-15 23:38:59,124 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 643 selfloop transitions, 263 changer transitions 0/913 dead transitions. [2020-10-15 23:38:59,124 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 913 transitions, 63727 flow [2020-10-15 23:38:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:38:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:38:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1231 transitions. [2020-10-15 23:38:59,127 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6767454645409565 [2020-10-15 23:38:59,127 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1231 transitions. [2020-10-15 23:38:59,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1231 transitions. [2020-10-15 23:38:59,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:38:59,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1231 transitions. [2020-10-15 23:38:59,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:38:59,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:38:59,129 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:38:59,129 INFO L185 Difference]: Start difference. First operand has 650 places, 889 transitions, 60706 flow. Second operand 17 states and 1231 transitions. [2020-10-15 23:38:59,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 913 transitions, 63727 flow [2020-10-15 23:39:02,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 913 transitions, 63608 flow, removed 0 selfloop flow, removed 9 redundant places. [2020-10-15 23:39:02,102 INFO L241 Difference]: Finished difference. Result has 658 places, 892 transitions, 61862 flow [2020-10-15 23:39:02,103 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=60587, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=61862, PETRI_PLACES=658, PETRI_TRANSITIONS=892} [2020-10-15 23:39:02,104 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 640 predicate places. [2020-10-15 23:39:02,104 INFO L481 AbstractCegarLoop]: Abstraction has has 658 places, 892 transitions, 61862 flow [2020-10-15 23:39:02,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:39:02,104 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:39:02,104 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:39:02,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 23:39:02,311 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:39:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:39:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash -84529117, now seen corresponding path program 77 times [2020-10-15 23:39:02,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:39:02,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628147975] [2020-10-15 23:39:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:39:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:39:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:02,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628147975] [2020-10-15 23:39:02,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072491614] [2020-10-15 23:39:02,480 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:39:02,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:39:02,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:39:02,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:39:02,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:39:02,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:39:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:02,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:39:02,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:39:02,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293633691] [2020-10-15 23:39:02,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:39:02,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:39:02,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:39:02,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:39:02,765 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:39:02,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 658 places, 892 transitions, 61862 flow. Second operand 17 states. [2020-10-15 23:39:02,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:39:02,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:39:02,765 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:39:04,783 INFO L129 PetriNetUnfolder]: 631/1690 cut-off events. [2020-10-15 23:39:04,783 INFO L130 PetriNetUnfolder]: For 577605/577607 co-relation queries the response was YES. [2020-10-15 23:39:04,817 INFO L80 FinitePrefix]: Finished finitePrefix Result has 43132 conditions, 1690 events. 631/1690 cut-off events. For 577605/577607 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 14970 event pairs, 0 based on Foata normal form. 4/1694 useless extension candidates. Maximal degree in co-relation 42877. Up to 928 conditions per place. [2020-10-15 23:39:04,840 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 610 selfloop transitions, 289 changer transitions 0/906 dead transitions. [2020-10-15 23:39:04,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 906 transitions, 65132 flow [2020-10-15 23:39:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:39:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:39:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1234 transitions. [2020-10-15 23:39:04,842 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783947223749313 [2020-10-15 23:39:04,842 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1234 transitions. [2020-10-15 23:39:04,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1234 transitions. [2020-10-15 23:39:04,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:39:04,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1234 transitions. [2020-10-15 23:39:04,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:39:04,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:39:04,844 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:39:04,844 INFO L185 Difference]: Start difference. First operand has 658 places, 892 transitions, 61862 flow. Second operand 17 states and 1234 transitions. [2020-10-15 23:39:04,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 906 transitions, 65132 flow [2020-10-15 23:39:08,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 663 places, 906 transitions, 64901 flow, removed 0 selfloop flow, removed 11 redundant places. [2020-10-15 23:39:08,116 INFO L241 Difference]: Finished difference. Result has 666 places, 900 transitions, 63676 flow [2020-10-15 23:39:08,117 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=61633, PETRI_DIFFERENCE_MINUEND_PLACES=647, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=63676, PETRI_PLACES=666, PETRI_TRANSITIONS=900} [2020-10-15 23:39:08,117 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 648 predicate places. [2020-10-15 23:39:08,117 INFO L481 AbstractCegarLoop]: Abstraction has has 666 places, 900 transitions, 63676 flow [2020-10-15 23:39:08,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:39:08,117 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:39:08,118 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:39:08,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-15 23:39:08,318 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:39:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:39:08,319 INFO L82 PathProgramCache]: Analyzing trace with hash -173059771, now seen corresponding path program 78 times [2020-10-15 23:39:08,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:39:08,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79775262] [2020-10-15 23:39:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:39:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:39:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:08,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79775262] [2020-10-15 23:39:08,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556273414] [2020-10-15 23:39:08,531 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:39:08,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 23:39:08,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:39:08,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:39:08,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:39:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:09,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:39:09,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:39:09,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170944720] [2020-10-15 23:39:09,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:39:09,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:39:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:39:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:39:09,177 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:39:09,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 900 transitions, 63676 flow. Second operand 17 states. [2020-10-15 23:39:09,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:39:09,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:39:09,179 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:39:11,285 INFO L129 PetriNetUnfolder]: 633/1698 cut-off events. [2020-10-15 23:39:11,286 INFO L130 PetriNetUnfolder]: For 593904/593906 co-relation queries the response was YES. [2020-10-15 23:39:11,327 INFO L80 FinitePrefix]: Finished finitePrefix Result has 43861 conditions, 1698 events. 633/1698 cut-off events. For 593904/593906 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 15054 event pairs, 0 based on Foata normal form. 3/1701 useless extension candidates. Maximal degree in co-relation 43603. Up to 991 conditions per place. [2020-10-15 23:39:11,350 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 721 selfloop transitions, 198 changer transitions 0/926 dead transitions. [2020-10-15 23:39:11,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 926 transitions, 66542 flow [2020-10-15 23:39:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:39:11,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:39:11,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1228 transitions. [2020-10-15 23:39:11,352 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6750962067069819 [2020-10-15 23:39:11,352 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1228 transitions. [2020-10-15 23:39:11,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1228 transitions. [2020-10-15 23:39:11,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:39:11,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1228 transitions. [2020-10-15 23:39:11,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:39:11,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:39:11,354 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:39:11,354 INFO L185 Difference]: Start difference. First operand has 666 places, 900 transitions, 63676 flow. Second operand 17 states and 1228 transitions. [2020-10-15 23:39:11,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 926 transitions, 66542 flow [2020-10-15 23:39:14,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 926 transitions, 65662 flow, removed 306 selfloop flow, removed 13 redundant places. [2020-10-15 23:39:14,608 INFO L241 Difference]: Finished difference. Result has 671 places, 903 transitions, 63739 flow [2020-10-15 23:39:14,609 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=62796, PETRI_DIFFERENCE_MINUEND_PLACES=653, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=63739, PETRI_PLACES=671, PETRI_TRANSITIONS=903} [2020-10-15 23:39:14,609 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 653 predicate places. [2020-10-15 23:39:14,610 INFO L481 AbstractCegarLoop]: Abstraction has has 671 places, 903 transitions, 63739 flow [2020-10-15 23:39:14,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:39:14,610 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:39:14,610 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:39:14,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 23:39:14,811 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:39:14,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:39:14,811 INFO L82 PathProgramCache]: Analyzing trace with hash -754944029, now seen corresponding path program 79 times [2020-10-15 23:39:14,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:39:14,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547308009] [2020-10-15 23:39:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:39:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:39:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:15,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547308009] [2020-10-15 23:39:15,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421364224] [2020-10-15 23:39:15,001 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:39:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:39:15,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:39:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:39:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:20,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:39:20,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:39:20,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754962488] [2020-10-15 23:39:20,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:39:20,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:39:20,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:39:20,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-15 23:39:20,280 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:39:20,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 671 places, 903 transitions, 63739 flow. Second operand 17 states. [2020-10-15 23:39:20,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:39:20,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:39:20,281 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:39:24,567 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 23:39:26,196 INFO L129 PetriNetUnfolder]: 641/1720 cut-off events. [2020-10-15 23:39:26,196 INFO L130 PetriNetUnfolder]: For 605404/605410 co-relation queries the response was YES. [2020-10-15 23:39:26,232 INFO L80 FinitePrefix]: Finished finitePrefix Result has 44389 conditions, 1720 events. 641/1720 cut-off events. For 605404/605410 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 15386 event pairs, 0 based on Foata normal form. 7/1727 useless extension candidates. Maximal degree in co-relation 44129. Up to 1000 conditions per place. [2020-10-15 23:39:26,256 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 719 selfloop transitions, 209 changer transitions 0/935 dead transitions. [2020-10-15 23:39:26,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 935 transitions, 67217 flow [2020-10-15 23:39:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 23:39:26,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-15 23:39:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1157 transitions. [2020-10-15 23:39:26,258 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758177570093458 [2020-10-15 23:39:26,258 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1157 transitions. [2020-10-15 23:39:26,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1157 transitions. [2020-10-15 23:39:26,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:39:26,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1157 transitions. [2020-10-15 23:39:26,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-15 23:39:26,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-15 23:39:26,261 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-15 23:39:26,261 INFO L185 Difference]: Start difference. First operand has 671 places, 903 transitions, 63739 flow. Second operand 16 states and 1157 transitions. [2020-10-15 23:39:26,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 935 transitions, 67217 flow [2020-10-15 23:39:29,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 935 transitions, 67025 flow, removed 2 selfloop flow, removed 12 redundant places. [2020-10-15 23:39:29,772 INFO L241 Difference]: Finished difference. Result has 677 places, 916 transitions, 65282 flow [2020-10-15 23:39:29,773 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=63547, PETRI_DIFFERENCE_MINUEND_PLACES=659, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=65282, PETRI_PLACES=677, PETRI_TRANSITIONS=916} [2020-10-15 23:39:29,773 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 659 predicate places. [2020-10-15 23:39:29,773 INFO L481 AbstractCegarLoop]: Abstraction has has 677 places, 916 transitions, 65282 flow [2020-10-15 23:39:29,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:39:29,774 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:39:29,774 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:39:29,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:39:29,988 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:39:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:39:29,989 INFO L82 PathProgramCache]: Analyzing trace with hash -84558908, now seen corresponding path program 80 times [2020-10-15 23:39:29,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:39:29,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498306866] [2020-10-15 23:39:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:39:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:39:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:30,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498306866] [2020-10-15 23:39:30,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047048308] [2020-10-15 23:39:30,160 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:39:30,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:39:30,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:39:30,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:39:30,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:39:32,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:39:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:32,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:39:32,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:39:32,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075109649] [2020-10-15 23:39:32,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:39:32,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:39:32,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:39:32,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-15 23:39:32,679 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:39:32,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 916 transitions, 65282 flow. Second operand 17 states. [2020-10-15 23:39:32,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:39:32,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:39:32,680 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:39:37,164 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-15 23:39:41,332 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-15 23:39:42,378 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-15 23:39:43,723 INFO L129 PetriNetUnfolder]: 652/1748 cut-off events. [2020-10-15 23:39:43,724 INFO L130 PetriNetUnfolder]: For 656533/656539 co-relation queries the response was YES. [2020-10-15 23:39:43,759 INFO L80 FinitePrefix]: Finished finitePrefix Result has 46106 conditions, 1748 events. 652/1748 cut-off events. For 656533/656539 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 15716 event pairs, 0 based on Foata normal form. 9/1757 useless extension candidates. Maximal degree in co-relation 45843. Up to 831 conditions per place. [2020-10-15 23:39:43,782 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 480 selfloop transitions, 448 changer transitions 0/935 dead transitions. [2020-10-15 23:39:43,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 701 places, 935 transitions, 69614 flow [2020-10-15 23:39:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 23:39:43,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-15 23:39:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1815 transitions. [2020-10-15 23:39:43,785 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785046728971963 [2020-10-15 23:39:43,785 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1815 transitions. [2020-10-15 23:39:43,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1815 transitions. [2020-10-15 23:39:43,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:39:43,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1815 transitions. [2020-10-15 23:39:43,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-15 23:39:43,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-15 23:39:43,788 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-15 23:39:43,788 INFO L185 Difference]: Start difference. First operand has 677 places, 916 transitions, 65282 flow. Second operand 25 states and 1815 transitions. [2020-10-15 23:39:43,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 701 places, 935 transitions, 69614 flow [2020-10-15 23:39:46,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 935 transitions, 69456 flow, removed 6 selfloop flow, removed 9 redundant places. [2020-10-15 23:39:47,003 INFO L241 Difference]: Finished difference. Result has 695 places, 932 transitions, 68788 flow [2020-10-15 23:39:47,003 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=65124, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=916, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=68788, PETRI_PLACES=695, PETRI_TRANSITIONS=932} [2020-10-15 23:39:47,003 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 677 predicate places. [2020-10-15 23:39:47,003 INFO L481 AbstractCegarLoop]: Abstraction has has 695 places, 932 transitions, 68788 flow [2020-10-15 23:39:47,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:39:47,004 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:39:47,004 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:39:47,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-15 23:39:47,205 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:39:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:39:47,205 INFO L82 PathProgramCache]: Analyzing trace with hash -754915199, now seen corresponding path program 81 times [2020-10-15 23:39:47,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:39:47,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843769940] [2020-10-15 23:39:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:39:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:39:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:47,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843769940] [2020-10-15 23:39:47,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652368133] [2020-10-15 23:39:47,376 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:39:47,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 23:39:47,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:39:47,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:39:47,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:39:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:47,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:39:47,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:39:47,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955270760] [2020-10-15 23:39:47,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:39:47,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:39:47,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:39:47,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:39:47,740 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:39:47,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 695 places, 932 transitions, 68788 flow. Second operand 17 states. [2020-10-15 23:39:47,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:39:47,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:39:47,741 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:39:49,421 INFO L129 PetriNetUnfolder]: 656/1761 cut-off events. [2020-10-15 23:39:49,421 INFO L130 PetriNetUnfolder]: For 668967/668973 co-relation queries the response was YES. [2020-10-15 23:39:49,459 INFO L80 FinitePrefix]: Finished finitePrefix Result has 47414 conditions, 1761 events. 656/1761 cut-off events. For 668967/668973 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 15849 event pairs, 0 based on Foata normal form. 7/1768 useless extension candidates. Maximal degree in co-relation 47148. Up to 1026 conditions per place. [2020-10-15 23:39:49,482 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 739 selfloop transitions, 212 changer transitions 0/958 dead transitions. [2020-10-15 23:39:49,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 958 transitions, 72249 flow [2020-10-15 23:39:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 23:39:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-15 23:39:49,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1157 transitions. [2020-10-15 23:39:49,484 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758177570093458 [2020-10-15 23:39:49,485 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1157 transitions. [2020-10-15 23:39:49,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1157 transitions. [2020-10-15 23:39:49,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:39:49,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1157 transitions. [2020-10-15 23:39:49,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-15 23:39:49,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-15 23:39:49,487 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-15 23:39:49,487 INFO L185 Difference]: Start difference. First operand has 695 places, 932 transitions, 68788 flow. Second operand 16 states and 1157 transitions. [2020-10-15 23:39:49,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 958 transitions, 72249 flow [2020-10-15 23:39:53,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 958 transitions, 70320 flow, removed 852 selfloop flow, removed 18 redundant places. [2020-10-15 23:39:53,178 INFO L241 Difference]: Finished difference. Result has 695 places, 938 transitions, 68495 flow [2020-10-15 23:39:53,179 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=67122, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=68495, PETRI_PLACES=695, PETRI_TRANSITIONS=938} [2020-10-15 23:39:53,179 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 677 predicate places. [2020-10-15 23:39:53,179 INFO L481 AbstractCegarLoop]: Abstraction has has 695 places, 938 transitions, 68495 flow [2020-10-15 23:39:53,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:39:53,179 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:39:53,179 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:39:53,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:39:53,380 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:39:53,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:39:53,380 INFO L82 PathProgramCache]: Analyzing trace with hash 164359128, now seen corresponding path program 82 times [2020-10-15 23:39:53,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:39:53,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759201774] [2020-10-15 23:39:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:39:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:39:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:53,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759201774] [2020-10-15 23:39:53,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748933063] [2020-10-15 23:39:53,515 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:39:53,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:39:53,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:39:53,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:39:53,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:39:53,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:39:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:53,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:39:53,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:39:53,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982157353] [2020-10-15 23:39:53,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:39:53,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:39:53,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:39:53,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:39:53,809 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:39:53,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 695 places, 938 transitions, 68495 flow. Second operand 17 states. [2020-10-15 23:39:53,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:39:53,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:39:53,810 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:39:55,714 INFO L129 PetriNetUnfolder]: 663/1779 cut-off events. [2020-10-15 23:39:55,714 INFO L130 PetriNetUnfolder]: For 667537/667543 co-relation queries the response was YES. [2020-10-15 23:39:55,750 INFO L80 FinitePrefix]: Finished finitePrefix Result has 47179 conditions, 1779 events. 663/1779 cut-off events. For 667537/667543 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 16071 event pairs, 0 based on Foata normal form. 8/1787 useless extension candidates. Maximal degree in co-relation 46911. Up to 1025 conditions per place. [2020-10-15 23:39:55,773 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 689 selfloop transitions, 260 changer transitions 0/956 dead transitions. [2020-10-15 23:39:55,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 711 places, 956 transitions, 72184 flow [2020-10-15 23:39:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 23:39:55,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 23:39:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1234 transitions. [2020-10-15 23:39:55,775 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783947223749313 [2020-10-15 23:39:55,775 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1234 transitions. [2020-10-15 23:39:55,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1234 transitions. [2020-10-15 23:39:55,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:39:55,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1234 transitions. [2020-10-15 23:39:55,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-15 23:39:55,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-15 23:39:55,777 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-15 23:39:55,777 INFO L185 Difference]: Start difference. First operand has 695 places, 938 transitions, 68495 flow. Second operand 17 states and 1234 transitions. [2020-10-15 23:39:55,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 711 places, 956 transitions, 72184 flow [2020-10-15 23:39:59,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 956 transitions, 71944 flow, removed 3 selfloop flow, removed 12 redundant places. [2020-10-15 23:39:59,233 INFO L241 Difference]: Finished difference. Result has 702 places, 947 transitions, 70454 flow [2020-10-15 23:39:59,234 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=68255, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=70454, PETRI_PLACES=702, PETRI_TRANSITIONS=947} [2020-10-15 23:39:59,234 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 684 predicate places. [2020-10-15 23:39:59,234 INFO L481 AbstractCegarLoop]: Abstraction has has 702 places, 947 transitions, 70454 flow [2020-10-15 23:39:59,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:39:59,234 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:39:59,235 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:39:59,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 23:39:59,448 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:39:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:39:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash -84530078, now seen corresponding path program 83 times [2020-10-15 23:39:59,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:39:59,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038979747] [2020-10-15 23:39:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:39:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:39:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:59,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038979747] [2020-10-15 23:39:59,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189263308] [2020-10-15 23:39:59,612 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:39:59,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 23:39:59,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:39:59,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:39:59,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:39:59,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:39:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:39:59,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:39:59,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:39:59,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444446839] [2020-10-15 23:39:59,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:39:59,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:39:59,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:39:59,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:39:59,971 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:39:59,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 947 transitions, 70454 flow. Second operand 17 states. [2020-10-15 23:39:59,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:39:59,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:39:59,972 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:40:02,480 INFO L129 PetriNetUnfolder]: 680/1824 cut-off events. [2020-10-15 23:40:02,481 INFO L130 PetriNetUnfolder]: For 727088/727094 co-relation queries the response was YES. [2020-10-15 23:40:02,519 INFO L80 FinitePrefix]: Finished finitePrefix Result has 49355 conditions, 1824 events. 680/1824 cut-off events. For 727088/727094 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 16546 event pairs, 0 based on Foata normal form. 9/1833 useless extension candidates. Maximal degree in co-relation 49084. Up to 1011 conditions per place. [2020-10-15 23:40:02,546 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 617 selfloop transitions, 354 changer transitions 0/978 dead transitions. [2020-10-15 23:40:02,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 978 transitions, 75695 flow [2020-10-15 23:40:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 23:40:02,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 23:40:02,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1670 transitions. [2020-10-15 23:40:02,548 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6785859406745226 [2020-10-15 23:40:02,548 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1670 transitions. [2020-10-15 23:40:02,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1670 transitions. [2020-10-15 23:40:02,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:40:02,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1670 transitions. [2020-10-15 23:40:02,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-15 23:40:02,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-15 23:40:02,550 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-15 23:40:02,550 INFO L185 Difference]: Start difference. First operand has 702 places, 947 transitions, 70454 flow. Second operand 23 states and 1670 transitions. [2020-10-15 23:40:02,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 978 transitions, 75695 flow [2020-10-15 23:40:05,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 978 transitions, 75059 flow, removed 286 selfloop flow, removed 10 redundant places. [2020-10-15 23:40:06,042 INFO L241 Difference]: Finished difference. Result has 717 places, 971 transitions, 73900 flow [2020-10-15 23:40:06,043 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=69818, PETRI_DIFFERENCE_MINUEND_PLACES=692, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=947, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=73900, PETRI_PLACES=717, PETRI_TRANSITIONS=971} [2020-10-15 23:40:06,043 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 699 predicate places. [2020-10-15 23:40:06,043 INFO L481 AbstractCegarLoop]: Abstraction has has 717 places, 971 transitions, 73900 flow [2020-10-15 23:40:06,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:40:06,043 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:40:06,043 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:40:06,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:40:06,244 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:40:06,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:40:06,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1235311371, now seen corresponding path program 84 times [2020-10-15 23:40:06,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:40:06,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795911336] [2020-10-15 23:40:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:40:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:40:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:40:06,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795911336] [2020-10-15 23:40:06,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340420966] [2020-10-15 23:40:06,397 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:40:06,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 23:40:06,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:40:06,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:40:06,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:40:08,725 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:40:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:40:08,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:40:08,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:40:08,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284600956] [2020-10-15 23:40:08,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:40:08,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:40:08,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:40:08,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=192, Unknown=1, NotChecked=0, Total=272 [2020-10-15 23:40:08,783 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:40:08,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 717 places, 971 transitions, 73900 flow. Second operand 17 states. [2020-10-15 23:40:08,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:40:08,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:40:08,783 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:40:12,133 INFO L129 PetriNetUnfolder]: 692/1862 cut-off events. [2020-10-15 23:40:12,134 INFO L130 PetriNetUnfolder]: For 761511/761517 co-relation queries the response was YES. [2020-10-15 23:40:12,176 INFO L80 FinitePrefix]: Finished finitePrefix Result has 51261 conditions, 1862 events. 692/1862 cut-off events. For 761511/761517 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 16955 event pairs, 0 based on Foata normal form. 9/1871 useless extension candidates. Maximal degree in co-relation 50986. Up to 827 conditions per place. [2020-10-15 23:40:12,203 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 471 selfloop transitions, 517 changer transitions 0/995 dead transitions. [2020-10-15 23:40:12,203 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 995 transitions, 78821 flow [2020-10-15 23:40:12,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 23:40:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 23:40:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2105 transitions. [2020-10-15 23:40:12,206 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783757653883339 [2020-10-15 23:40:12,206 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2105 transitions. [2020-10-15 23:40:12,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2105 transitions. [2020-10-15 23:40:12,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:40:12,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2105 transitions. [2020-10-15 23:40:12,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-15 23:40:12,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-15 23:40:12,209 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-15 23:40:12,209 INFO L185 Difference]: Start difference. First operand has 717 places, 971 transitions, 73900 flow. Second operand 29 states and 2105 transitions. [2020-10-15 23:40:12,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 995 transitions, 78821 flow [2020-10-15 23:40:16,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 724 places, 995 transitions, 77410 flow, removed 476 selfloop flow, removed 21 redundant places. [2020-10-15 23:40:16,493 INFO L241 Difference]: Finished difference. Result has 727 places, 988 transitions, 76600 flow [2020-10-15 23:40:16,494 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=72489, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=76600, PETRI_PLACES=727, PETRI_TRANSITIONS=988} [2020-10-15 23:40:16,494 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 709 predicate places. [2020-10-15 23:40:16,494 INFO L481 AbstractCegarLoop]: Abstraction has has 727 places, 988 transitions, 76600 flow [2020-10-15 23:40:16,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:40:16,494 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:40:16,495 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:40:16,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:40:16,695 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:40:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:40:16,696 INFO L82 PathProgramCache]: Analyzing trace with hash -84559869, now seen corresponding path program 85 times [2020-10-15 23:40:16,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:40:16,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303852685] [2020-10-15 23:40:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:40:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:40:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:40:16,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303852685] [2020-10-15 23:40:16,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849767569] [2020-10-15 23:40:16,838 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:40:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:40:16,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:40:16,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:40:17,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:40:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:40:17,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:40:17,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:40:17,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129526569] [2020-10-15 23:40:17,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:40:17,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:40:17,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:40:17,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:40:17,280 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:40:17,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 727 places, 988 transitions, 76600 flow. Second operand 17 states. [2020-10-15 23:40:17,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:40:17,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:40:17,280 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:40:19,708 INFO L129 PetriNetUnfolder]: 702/1884 cut-off events. [2020-10-15 23:40:19,709 INFO L130 PetriNetUnfolder]: For 779531/779537 co-relation queries the response was YES. [2020-10-15 23:40:19,749 INFO L80 FinitePrefix]: Finished finitePrefix Result has 52551 conditions, 1884 events. 702/1884 cut-off events. For 779531/779537 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 17146 event pairs, 0 based on Foata normal form. 8/1892 useless extension candidates. Maximal degree in co-relation 52272. Up to 1154 conditions per place. [2020-10-15 23:40:19,774 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 751 selfloop transitions, 249 changer transitions 0/1007 dead transitions. [2020-10-15 23:40:19,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 749 places, 1007 transitions, 80676 flow [2020-10-15 23:40:19,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 23:40:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 23:40:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1669 transitions. [2020-10-15 23:40:19,777 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.678179601787891 [2020-10-15 23:40:19,777 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1669 transitions. [2020-10-15 23:40:19,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1669 transitions. [2020-10-15 23:40:19,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:40:19,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1669 transitions. [2020-10-15 23:40:19,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-15 23:40:19,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-15 23:40:19,779 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-15 23:40:19,779 INFO L185 Difference]: Start difference. First operand has 727 places, 988 transitions, 76600 flow. Second operand 23 states and 1669 transitions. [2020-10-15 23:40:19,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 749 places, 1007 transitions, 80676 flow [2020-10-15 23:40:24,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 1007 transitions, 77730 flow, removed 1205 selfloop flow, removed 22 redundant places. [2020-10-15 23:40:24,194 INFO L241 Difference]: Finished difference. Result has 730 places, 1002 transitions, 76111 flow [2020-10-15 23:40:24,195 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=73667, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=76111, PETRI_PLACES=730, PETRI_TRANSITIONS=1002} [2020-10-15 23:40:24,196 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 712 predicate places. [2020-10-15 23:40:24,196 INFO L481 AbstractCegarLoop]: Abstraction has has 730 places, 1002 transitions, 76111 flow [2020-10-15 23:40:24,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:40:24,196 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:40:24,196 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:40:24,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-10-15 23:40:24,411 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:40:24,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:40:24,412 INFO L82 PathProgramCache]: Analyzing trace with hash 789840089, now seen corresponding path program 86 times [2020-10-15 23:40:24,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:40:24,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061641117] [2020-10-15 23:40:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:40:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:40:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:40:24,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061641117] [2020-10-15 23:40:24,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330933190] [2020-10-15 23:40:24,564 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:40:24,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:40:24,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:40:24,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:40:24,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:40:24,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:40:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:40:24,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:40:24,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:40:24,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548615895] [2020-10-15 23:40:24,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:40:24,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:40:24,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:40:24,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:40:24,897 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:40:24,898 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 1002 transitions, 76111 flow. Second operand 17 states. [2020-10-15 23:40:24,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:40:24,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:40:24,898 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:40:28,021 INFO L129 PetriNetUnfolder]: 711/1911 cut-off events. [2020-10-15 23:40:28,021 INFO L130 PetriNetUnfolder]: For 768215/768217 co-relation queries the response was YES. [2020-10-15 23:40:28,063 INFO L80 FinitePrefix]: Finished finitePrefix Result has 52343 conditions, 1911 events. 711/1911 cut-off events. For 768215/768217 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 17311 event pairs, 0 based on Foata normal form. 4/1915 useless extension candidates. Maximal degree in co-relation 52061. Up to 835 conditions per place. [2020-10-15 23:40:28,089 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 447 selfloop transitions, 567 changer transitions 0/1021 dead transitions. [2020-10-15 23:40:28,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 758 places, 1021 transitions, 80414 flow [2020-10-15 23:40:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 23:40:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 23:40:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2104 transitions. [2020-10-15 23:40:28,093 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780534966161779 [2020-10-15 23:40:28,094 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2104 transitions. [2020-10-15 23:40:28,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2104 transitions. [2020-10-15 23:40:28,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:40:28,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2104 transitions. [2020-10-15 23:40:28,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-15 23:40:28,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-15 23:40:28,097 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-15 23:40:28,098 INFO L185 Difference]: Start difference. First operand has 730 places, 1002 transitions, 76111 flow. Second operand 29 states and 2104 transitions. [2020-10-15 23:40:28,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 758 places, 1021 transitions, 80414 flow [2020-10-15 23:40:32,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 741 places, 1021 transitions, 79748 flow, removed 247 selfloop flow, removed 17 redundant places. [2020-10-15 23:40:32,268 INFO L241 Difference]: Finished difference. Result has 744 places, 1013 transitions, 78908 flow [2020-10-15 23:40:32,269 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=75447, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=78908, PETRI_PLACES=744, PETRI_TRANSITIONS=1013} [2020-10-15 23:40:32,269 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 726 predicate places. [2020-10-15 23:40:32,269 INFO L481 AbstractCegarLoop]: Abstraction has has 744 places, 1013 transitions, 78908 flow [2020-10-15 23:40:32,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:40:32,269 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:40:32,269 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:40:32,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 23:40:32,470 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:40:32,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:40:32,471 INFO L82 PathProgramCache]: Analyzing trace with hash 767675368, now seen corresponding path program 87 times [2020-10-15 23:40:32,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:40:32,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092300802] [2020-10-15 23:40:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:40:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:40:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:40:32,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092300802] [2020-10-15 23:40:32,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490559793] [2020-10-15 23:40:32,633 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:40:32,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 23:40:32,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:40:32,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:40:32,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:40:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:40:33,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:40:33,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:40:33,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575025563] [2020-10-15 23:40:33,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:40:33,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:40:33,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:40:33,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:40:33,070 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:40:33,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 1013 transitions, 78908 flow. Second operand 17 states. [2020-10-15 23:40:33,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:40:33,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:40:33,070 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:40:35,304 INFO L129 PetriNetUnfolder]: 714/1923 cut-off events. [2020-10-15 23:40:35,304 INFO L130 PetriNetUnfolder]: For 780298/780300 co-relation queries the response was YES. [2020-10-15 23:40:35,347 INFO L80 FinitePrefix]: Finished finitePrefix Result has 53322 conditions, 1923 events. 714/1923 cut-off events. For 780298/780300 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 17439 event pairs, 0 based on Foata normal form. 3/1926 useless extension candidates. Maximal degree in co-relation 53037. Up to 1087 conditions per place. [2020-10-15 23:40:35,373 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 776 selfloop transitions, 266 changer transitions 0/1049 dead transitions. [2020-10-15 23:40:35,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 761 places, 1049 transitions, 82564 flow [2020-10-15 23:40:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 23:40:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-15 23:40:35,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1302 transitions. [2020-10-15 23:40:35,377 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67601246105919 [2020-10-15 23:40:35,377 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1302 transitions. [2020-10-15 23:40:35,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1302 transitions. [2020-10-15 23:40:35,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:40:35,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1302 transitions. [2020-10-15 23:40:35,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-15 23:40:35,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-15 23:40:35,380 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-15 23:40:35,380 INFO L185 Difference]: Start difference. First operand has 744 places, 1013 transitions, 78908 flow. Second operand 18 states and 1302 transitions. [2020-10-15 23:40:35,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 761 places, 1049 transitions, 82564 flow [2020-10-15 23:40:39,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 739 places, 1049 transitions, 81010 flow, removed 522 selfloop flow, removed 22 redundant places. [2020-10-15 23:40:39,621 INFO L241 Difference]: Finished difference. Result has 741 places, 1017 transitions, 78686 flow [2020-10-15 23:40:39,622 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=77359, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=747, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=78686, PETRI_PLACES=741, PETRI_TRANSITIONS=1017} [2020-10-15 23:40:39,622 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 723 predicate places. [2020-10-15 23:40:39,622 INFO L481 AbstractCegarLoop]: Abstraction has has 741 places, 1017 transitions, 78686 flow [2020-10-15 23:40:39,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:40:39,622 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:40:39,623 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:40:39,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:40:39,823 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:40:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:40:39,824 INFO L82 PathProgramCache]: Analyzing trace with hash 789839128, now seen corresponding path program 88 times [2020-10-15 23:40:39,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:40:39,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111632310] [2020-10-15 23:40:39,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:40:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:40:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:40:39,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111632310] [2020-10-15 23:40:39,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484021855] [2020-10-15 23:40:39,989 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:40:40,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:40:40,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:40:40,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:40:40,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:40:40,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:40:40,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:40:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:40:40,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:40:40,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:40:40,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012119014] [2020-10-15 23:40:40,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:40:40,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:40:40,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:40:40,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:40:40,542 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:40:40,543 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 741 places, 1017 transitions, 78686 flow. Second operand 17 states. [2020-10-15 23:40:40,543 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:40:40,543 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:40:40,543 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:40:44,245 INFO L129 PetriNetUnfolder]: 733/1970 cut-off events. [2020-10-15 23:40:44,245 INFO L130 PetriNetUnfolder]: For 842128/842134 co-relation queries the response was YES. [2020-10-15 23:40:44,289 INFO L80 FinitePrefix]: Finished finitePrefix Result has 55088 conditions, 1970 events. 733/1970 cut-off events. For 842128/842134 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 18079 event pairs, 0 based on Foata normal form. 9/1979 useless extension candidates. Maximal degree in co-relation 54801. Up to 1099 conditions per place. [2020-10-15 23:40:44,318 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 632 selfloop transitions, 410 changer transitions 0/1049 dead transitions. [2020-10-15 23:40:44,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 769 places, 1049 transitions, 84582 flow [2020-10-15 23:40:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 23:40:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 23:40:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2105 transitions. [2020-10-15 23:40:44,322 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783757653883339 [2020-10-15 23:40:44,322 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2105 transitions. [2020-10-15 23:40:44,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2105 transitions. [2020-10-15 23:40:44,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:40:44,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2105 transitions. [2020-10-15 23:40:44,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-15 23:40:44,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-15 23:40:44,325 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-15 23:40:44,325 INFO L185 Difference]: Start difference. First operand has 741 places, 1017 transitions, 78686 flow. Second operand 29 states and 2105 transitions. [2020-10-15 23:40:44,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 769 places, 1049 transitions, 84582 flow [2020-10-15 23:40:48,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 755 places, 1049 transitions, 84295 flow, removed 11 selfloop flow, removed 14 redundant places. [2020-10-15 23:40:48,909 INFO L241 Difference]: Finished difference. Result has 758 places, 1045 transitions, 83119 flow [2020-10-15 23:40:48,910 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=78407, PETRI_DIFFERENCE_MINUEND_PLACES=727, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=83119, PETRI_PLACES=758, PETRI_TRANSITIONS=1045} [2020-10-15 23:40:48,910 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 740 predicate places. [2020-10-15 23:40:48,910 INFO L481 AbstractCegarLoop]: Abstraction has has 758 places, 1045 transitions, 83119 flow [2020-10-15 23:40:48,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:40:48,910 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:40:48,910 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:40:49,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-15 23:40:49,111 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:40:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:40:49,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1234388811, now seen corresponding path program 89 times [2020-10-15 23:40:49,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:40:49,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435944339] [2020-10-15 23:40:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:40:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:40:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:40:49,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435944339] [2020-10-15 23:40:49,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039242942] [2020-10-15 23:40:49,286 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:40:49,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 23:40:49,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:40:49,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:40:49,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:40:49,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:40:49,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:40:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:40:49,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:40:49,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:40:49,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154557717] [2020-10-15 23:40:49,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:40:49,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:40:49,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:40:49,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:40:49,689 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:40:49,689 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 758 places, 1045 transitions, 83119 flow. Second operand 17 states. [2020-10-15 23:40:49,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:40:49,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:40:49,690 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:40:53,043 INFO L129 PetriNetUnfolder]: 743/1995 cut-off events. [2020-10-15 23:40:53,043 INFO L130 PetriNetUnfolder]: For 870815/870821 co-relation queries the response was YES. [2020-10-15 23:40:53,086 INFO L80 FinitePrefix]: Finished finitePrefix Result has 56781 conditions, 1995 events. 743/1995 cut-off events. For 870815/870821 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 18381 event pairs, 0 based on Foata normal form. 8/2003 useless extension candidates. Maximal degree in co-relation 56493. Up to 1047 conditions per place. [2020-10-15 23:40:53,114 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 601 selfloop transitions, 461 changer transitions 0/1069 dead transitions. [2020-10-15 23:40:53,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 1069 transitions, 87780 flow [2020-10-15 23:40:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 23:40:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 23:40:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1959 transitions. [2020-10-15 23:40:53,117 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780893042575286 [2020-10-15 23:40:53,117 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1959 transitions. [2020-10-15 23:40:53,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1959 transitions. [2020-10-15 23:40:53,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:40:53,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1959 transitions. [2020-10-15 23:40:53,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-15 23:40:53,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-15 23:40:53,120 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-15 23:40:53,120 INFO L185 Difference]: Start difference. First operand has 758 places, 1045 transitions, 83119 flow. Second operand 27 states and 1959 transitions. [2020-10-15 23:40:53,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 1069 transitions, 87780 flow [2020-10-15 23:40:57,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 1069 transitions, 85539 flow, removed 871 selfloop flow, removed 26 redundant places. [2020-10-15 23:40:57,990 INFO L241 Difference]: Finished difference. Result has 761 places, 1058 transitions, 84122 flow [2020-10-15 23:40:57,991 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=81038, PETRI_DIFFERENCE_MINUEND_PLACES=732, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=84122, PETRI_PLACES=761, PETRI_TRANSITIONS=1058} [2020-10-15 23:40:57,991 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 743 predicate places. [2020-10-15 23:40:57,991 INFO L481 AbstractCegarLoop]: Abstraction has has 761 places, 1058 transitions, 84122 flow [2020-10-15 23:40:57,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:40:57,991 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:40:57,992 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:40:58,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 23:40:58,207 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:40:58,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:40:58,207 INFO L82 PathProgramCache]: Analyzing trace with hash 788945398, now seen corresponding path program 90 times [2020-10-15 23:40:58,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:40:58,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883546444] [2020-10-15 23:40:58,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:40:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:40:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:40:58,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883546444] [2020-10-15 23:40:58,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708788937] [2020-10-15 23:40:58,374 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:40:58,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 23:40:58,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:40:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:40:58,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:41:11,712 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 23:41:11,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:41:11,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:41:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:41:11,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:41:11,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:41:11,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381721474] [2020-10-15 23:41:11,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:41:11,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:41:11,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:41:11,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=180, Unknown=7, NotChecked=0, Total=272 [2020-10-15 23:41:11,810 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:41:11,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 761 places, 1058 transitions, 84122 flow. Second operand 17 states. [2020-10-15 23:41:11,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:41:11,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:41:11,810 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:41:16,281 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 23:41:20,442 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 23:41:24,453 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-10-15 23:41:35,688 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-15 23:41:40,337 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-15 23:41:42,460 INFO L129 PetriNetUnfolder]: 752/2022 cut-off events. [2020-10-15 23:41:42,460 INFO L130 PetriNetUnfolder]: For 875477/875483 co-relation queries the response was YES. [2020-10-15 23:41:42,509 INFO L80 FinitePrefix]: Finished finitePrefix Result has 57247 conditions, 2022 events. 752/2022 cut-off events. For 875477/875483 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 18691 event pairs, 0 based on Foata normal form. 8/2030 useless extension candidates. Maximal degree in co-relation 56956. Up to 962 conditions per place. [2020-10-15 23:41:42,539 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 461 selfloop transitions, 607 changer transitions 0/1075 dead transitions. [2020-10-15 23:41:42,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 789 places, 1075 transitions, 88242 flow [2020-10-15 23:41:42,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 23:41:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 23:41:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2104 transitions. [2020-10-15 23:41:42,544 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780534966161779 [2020-10-15 23:41:42,544 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2104 transitions. [2020-10-15 23:41:42,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2104 transitions. [2020-10-15 23:41:42,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:41:42,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2104 transitions. [2020-10-15 23:41:42,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-15 23:41:42,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-15 23:41:42,547 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-15 23:41:42,547 INFO L185 Difference]: Start difference. First operand has 761 places, 1058 transitions, 84122 flow. Second operand 29 states and 2104 transitions. [2020-10-15 23:41:42,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 789 places, 1075 transitions, 88242 flow [2020-10-15 23:41:47,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 1075 transitions, 87090 flow, removed 380 selfloop flow, removed 22 redundant places. [2020-10-15 23:41:47,727 INFO L241 Difference]: Finished difference. Result has 770 places, 1070 transitions, 86094 flow [2020-10-15 23:41:47,728 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=82970, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=86094, PETRI_PLACES=770, PETRI_TRANSITIONS=1070} [2020-10-15 23:41:47,728 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 752 predicate places. [2020-10-15 23:41:47,728 INFO L481 AbstractCegarLoop]: Abstraction has has 770 places, 1070 transitions, 86094 flow [2020-10-15 23:41:47,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:41:47,728 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:41:47,728 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:41:47,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-15 23:41:47,929 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:41:47,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:41:47,930 INFO L82 PathProgramCache]: Analyzing trace with hash 788916568, now seen corresponding path program 91 times [2020-10-15 23:41:47,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:41:47,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609533653] [2020-10-15 23:41:47,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:41:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:41:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:41:48,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609533653] [2020-10-15 23:41:48,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575276990] [2020-10-15 23:41:48,120 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:41:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:41:48,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:41:48,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:41:48,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:41:48,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:41:48,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:41:48,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:41:48,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:41:48,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:41:48,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:41:48,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:41:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:41:48,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:41:48,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:41:48,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403733873] [2020-10-15 23:41:48,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:41:48,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:41:48,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:41:48,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:41:48,836 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:41:48,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 770 places, 1070 transitions, 86094 flow. Second operand 17 states. [2020-10-15 23:41:48,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:41:48,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:41:48,837 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:41:49,918 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-15 23:41:50,344 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-15 23:41:52,973 INFO L129 PetriNetUnfolder]: 759/2042 cut-off events. [2020-10-15 23:41:52,973 INFO L130 PetriNetUnfolder]: For 895300/895306 co-relation queries the response was YES. [2020-10-15 23:41:53,022 INFO L80 FinitePrefix]: Finished finitePrefix Result has 58696 conditions, 2042 events. 759/2042 cut-off events. For 895300/895306 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 18921 event pairs, 0 based on Foata normal form. 8/2050 useless extension candidates. Maximal degree in co-relation 58401. Up to 958 conditions per place. [2020-10-15 23:41:53,251 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 542 selfloop transitions, 539 changer transitions 0/1088 dead transitions. [2020-10-15 23:41:53,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 1088 transitions, 90286 flow [2020-10-15 23:41:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 23:41:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 23:41:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1959 transitions. [2020-10-15 23:41:53,254 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780893042575286 [2020-10-15 23:41:53,254 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1959 transitions. [2020-10-15 23:41:53,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1959 transitions. [2020-10-15 23:41:53,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:41:53,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1959 transitions. [2020-10-15 23:41:53,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 28 states. [2020-10-15 23:41:53,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 28 states. [2020-10-15 23:41:53,257 INFO L81 ComplementDD]: Finished complementDD. Result 28 states. [2020-10-15 23:41:53,257 INFO L185 Difference]: Start difference. First operand has 770 places, 1070 transitions, 86094 flow. Second operand 27 states and 1959 transitions. [2020-10-15 23:41:53,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 1088 transitions, 90286 flow [2020-10-15 23:41:57,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 773 places, 1088 transitions, 88961 flow, removed 430 selfloop flow, removed 23 redundant places. [2020-10-15 23:41:57,995 INFO L241 Difference]: Finished difference. Result has 776 places, 1079 transitions, 87841 flow [2020-10-15 23:41:57,996 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=84771, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=87841, PETRI_PLACES=776, PETRI_TRANSITIONS=1079} [2020-10-15 23:41:57,996 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 758 predicate places. [2020-10-15 23:41:57,996 INFO L481 AbstractCegarLoop]: Abstraction has has 776 places, 1079 transitions, 87841 flow [2020-10-15 23:41:57,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:41:57,996 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:41:57,996 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:41:58,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:41:58,206 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:41:58,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:41:58,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1046693220, now seen corresponding path program 92 times [2020-10-15 23:41:58,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:41:58,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236707289] [2020-10-15 23:41:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:41:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:41:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:41:58,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236707289] [2020-10-15 23:41:58,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163752839] [2020-10-15 23:41:58,362 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:41:58,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:41:58,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:41:58,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:41:58,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:41:58,599 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:41:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:41:58,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:41:58,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:41:58,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007248266] [2020-10-15 23:41:58,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:41:58,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:41:58,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:41:58,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:41:58,624 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:41:58,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 776 places, 1079 transitions, 87841 flow. Second operand 17 states. [2020-10-15 23:41:58,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:41:58,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:41:58,625 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:42:01,881 INFO L129 PetriNetUnfolder]: 772/2071 cut-off events. [2020-10-15 23:42:01,881 INFO L130 PetriNetUnfolder]: For 945739/945745 co-relation queries the response was YES. [2020-10-15 23:42:01,927 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60513 conditions, 2071 events. 772/2071 cut-off events. For 945739/945745 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 19243 event pairs, 0 based on Foata normal form. 9/2080 useless extension candidates. Maximal degree in co-relation 60215. Up to 985 conditions per place. [2020-10-15 23:42:01,956 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 601 selfloop transitions, 498 changer transitions 0/1106 dead transitions. [2020-10-15 23:42:01,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 806 places, 1106 transitions, 92988 flow [2020-10-15 23:42:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 23:42:01,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-15 23:42:01,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2250 transitions. [2020-10-15 23:42:01,960 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783237865541152 [2020-10-15 23:42:01,960 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2250 transitions. [2020-10-15 23:42:01,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2250 transitions. [2020-10-15 23:42:01,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:42:01,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2250 transitions. [2020-10-15 23:42:01,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-15 23:42:01,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-15 23:42:01,964 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-15 23:42:01,964 INFO L185 Difference]: Start difference. First operand has 776 places, 1079 transitions, 87841 flow. Second operand 31 states and 2250 transitions. [2020-10-15 23:42:01,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 806 places, 1106 transitions, 92988 flow [2020-10-15 23:42:07,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 1106 transitions, 91795 flow, removed 418 selfloop flow, removed 21 redundant places. [2020-10-15 23:42:07,356 INFO L241 Difference]: Finished difference. Result has 789 places, 1099 transitions, 90658 flow [2020-10-15 23:42:07,357 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=86648, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=482, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=90658, PETRI_PLACES=789, PETRI_TRANSITIONS=1099} [2020-10-15 23:42:07,357 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 771 predicate places. [2020-10-15 23:42:07,357 INFO L481 AbstractCegarLoop]: Abstraction has has 789 places, 1099 transitions, 90658 flow [2020-10-15 23:42:07,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:42:07,357 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:42:07,357 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:42:07,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-15 23:42:07,558 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:42:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:42:07,559 INFO L82 PathProgramCache]: Analyzing trace with hash 2096167138, now seen corresponding path program 93 times [2020-10-15 23:42:07,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:42:07,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668815638] [2020-10-15 23:42:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:42:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:42:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:42:07,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668815638] [2020-10-15 23:42:07,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791957505] [2020-10-15 23:42:07,708 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:42:07,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 23:42:07,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:42:07,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:42:07,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:42:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:42:08,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:42:08,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:42:08,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501757355] [2020-10-15 23:42:08,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:42:08,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:42:08,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:42:08,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:42:08,030 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:42:08,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 789 places, 1099 transitions, 90658 flow. Second operand 17 states. [2020-10-15 23:42:08,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:42:08,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:42:08,030 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:42:10,826 INFO L129 PetriNetUnfolder]: 780/2094 cut-off events. [2020-10-15 23:42:10,826 INFO L130 PetriNetUnfolder]: For 949321/949327 co-relation queries the response was YES. [2020-10-15 23:42:10,874 INFO L80 FinitePrefix]: Finished finitePrefix Result has 61381 conditions, 2094 events. 780/2094 cut-off events. For 949321/949327 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 19532 event pairs, 0 based on Foata normal form. 7/2101 useless extension candidates. Maximal degree in co-relation 61079. Up to 1089 conditions per place. [2020-10-15 23:42:10,903 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 745 selfloop transitions, 393 changer transitions 0/1145 dead transitions. [2020-10-15 23:42:10,904 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 1145 transitions, 95101 flow [2020-10-15 23:42:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 23:42:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 23:42:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2098 transitions. [2020-10-15 23:42:10,906 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6761198839832421 [2020-10-15 23:42:10,906 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2098 transitions. [2020-10-15 23:42:10,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2098 transitions. [2020-10-15 23:42:10,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:42:10,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2098 transitions. [2020-10-15 23:42:10,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-15 23:42:10,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-15 23:42:10,909 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-15 23:42:10,909 INFO L185 Difference]: Start difference. First operand has 789 places, 1099 transitions, 90658 flow. Second operand 29 states and 2098 transitions. [2020-10-15 23:42:10,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 1145 transitions, 95101 flow [2020-10-15 23:42:16,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 793 places, 1145 transitions, 92071 flow, removed 1227 selfloop flow, removed 24 redundant places. [2020-10-15 23:42:16,393 INFO L241 Difference]: Finished difference. Result has 795 places, 1108 transitions, 89757 flow [2020-10-15 23:42:16,393 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=87631, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1099, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=89757, PETRI_PLACES=795, PETRI_TRANSITIONS=1108} [2020-10-15 23:42:16,394 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 777 predicate places. [2020-10-15 23:42:16,394 INFO L481 AbstractCegarLoop]: Abstraction has has 795 places, 1108 transitions, 89757 flow [2020-10-15 23:42:16,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:42:16,394 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:42:16,394 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:42:16,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-15 23:42:16,595 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:42:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:42:16,595 INFO L82 PathProgramCache]: Analyzing trace with hash -376436841, now seen corresponding path program 94 times [2020-10-15 23:42:16,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:42:16,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091749884] [2020-10-15 23:42:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:42:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:42:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:42:16,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091749884] [2020-10-15 23:42:16,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373942876] [2020-10-15 23:42:16,766 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:42:16,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:42:16,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:42:16,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:42:16,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:42:17,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:42:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:42:17,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:42:17,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:42:17,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477178974] [2020-10-15 23:42:17,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:42:17,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:42:17,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:42:17,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:42:17,063 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:42:17,064 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 1108 transitions, 89757 flow. Second operand 17 states. [2020-10-15 23:42:17,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:42:17,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:42:17,064 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:42:20,890 INFO L129 PetriNetUnfolder]: 791/2122 cut-off events. [2020-10-15 23:42:20,890 INFO L130 PetriNetUnfolder]: For 989665/989671 co-relation queries the response was YES. [2020-10-15 23:42:20,937 INFO L80 FinitePrefix]: Finished finitePrefix Result has 61818 conditions, 2122 events. 791/2122 cut-off events. For 989665/989671 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 19817 event pairs, 0 based on Foata normal form. 9/2131 useless extension candidates. Maximal degree in co-relation 61515. Up to 876 conditions per place. [2020-10-15 23:42:20,967 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 463 selfloop transitions, 663 changer transitions 0/1133 dead transitions. [2020-10-15 23:42:20,967 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 829 places, 1133 transitions, 95070 flow [2020-10-15 23:42:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 23:42:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-15 23:42:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2540 transitions. [2020-10-15 23:42:20,970 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.678237650200267 [2020-10-15 23:42:20,970 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2540 transitions. [2020-10-15 23:42:20,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2540 transitions. [2020-10-15 23:42:20,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:42:20,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2540 transitions. [2020-10-15 23:42:20,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-15 23:42:20,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-15 23:42:20,973 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-15 23:42:20,973 INFO L185 Difference]: Start difference. First operand has 795 places, 1108 transitions, 89757 flow. Second operand 35 states and 2540 transitions. [2020-10-15 23:42:20,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 829 places, 1133 transitions, 95070 flow [2020-10-15 23:42:26,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 804 places, 1133 transitions, 94413 flow, removed 92 selfloop flow, removed 25 redundant places. [2020-10-15 23:42:26,216 INFO L241 Difference]: Finished difference. Result has 807 places, 1124 transitions, 93616 flow [2020-10-15 23:42:26,216 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=89100, PETRI_DIFFERENCE_MINUEND_PLACES=770, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=651, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=93616, PETRI_PLACES=807, PETRI_TRANSITIONS=1124} [2020-10-15 23:42:26,217 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 789 predicate places. [2020-10-15 23:42:26,217 INFO L481 AbstractCegarLoop]: Abstraction has has 807 places, 1124 transitions, 93616 flow [2020-10-15 23:42:26,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:42:26,217 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:42:26,217 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:42:26,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:42:26,418 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:42:26,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:42:26,418 INFO L82 PathProgramCache]: Analyzing trace with hash -346913960, now seen corresponding path program 95 times [2020-10-15 23:42:26,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:42:26,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143533583] [2020-10-15 23:42:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:42:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:42:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:42:26,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143533583] [2020-10-15 23:42:26,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588333047] [2020-10-15 23:42:26,628 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:42:26,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 23:42:26,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:42:26,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:42:26,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:42:27,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:42:31,200 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 20 [2020-10-15 23:42:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:42:31,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:42:31,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 23:42:31,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54602833] [2020-10-15 23:42:31,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 23:42:31,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:42:31,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 23:42:31,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=226, Unknown=1, NotChecked=0, Total=306 [2020-10-15 23:42:31,204 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:42:31,204 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 807 places, 1124 transitions, 93616 flow. Second operand 18 states. [2020-10-15 23:42:31,204 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:42:31,204 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:42:31,205 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:42:37,324 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 23:42:47,909 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 30 [2020-10-15 23:42:55,581 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-15 23:43:30,636 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-10-15 23:43:53,210 INFO L129 PetriNetUnfolder]: 803/2153 cut-off events. [2020-10-15 23:43:53,210 INFO L130 PetriNetUnfolder]: For 1023686/1023688 co-relation queries the response was YES. [2020-10-15 23:43:53,259 INFO L80 FinitePrefix]: Finished finitePrefix Result has 63756 conditions, 2153 events. 803/2153 cut-off events. For 1023686/1023688 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 19917 event pairs, 0 based on Foata normal form. 4/2157 useless extension candidates. Maximal degree in co-relation 63453. Up to 967 conditions per place. [2020-10-15 23:43:53,290 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 536 selfloop transitions, 612 changer transitions 0/1155 dead transitions. [2020-10-15 23:43:53,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 839 places, 1155 transitions, 98575 flow [2020-10-15 23:43:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 23:43:53,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-15 23:43:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2392 transitions. [2020-10-15 23:43:53,293 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6774284905126027 [2020-10-15 23:43:53,293 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2392 transitions. [2020-10-15 23:43:53,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2392 transitions. [2020-10-15 23:43:53,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:43:53,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2392 transitions. [2020-10-15 23:43:53,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-15 23:43:53,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-15 23:43:53,296 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-15 23:43:53,296 INFO L185 Difference]: Start difference. First operand has 807 places, 1124 transitions, 93616 flow. Second operand 33 states and 2392 transitions. [2020-10-15 23:43:53,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 839 places, 1155 transitions, 98575 flow [2020-10-15 23:43:59,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 811 places, 1155 transitions, 96099 flow, removed 1009 selfloop flow, removed 28 redundant places. [2020-10-15 23:43:59,208 INFO L241 Difference]: Finished difference. Result has 814 places, 1141 transitions, 94593 flow [2020-10-15 23:43:59,209 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=91160, PETRI_DIFFERENCE_MINUEND_PLACES=779, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=94593, PETRI_PLACES=814, PETRI_TRANSITIONS=1141} [2020-10-15 23:43:59,209 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 796 predicate places. [2020-10-15 23:43:59,209 INFO L481 AbstractCegarLoop]: Abstraction has has 814 places, 1141 transitions, 94593 flow [2020-10-15 23:43:59,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 23:43:59,209 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:43:59,209 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:43:59,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:43:59,410 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:43:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:43:59,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2096852548, now seen corresponding path program 96 times [2020-10-15 23:43:59,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:43:59,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578764278] [2020-10-15 23:43:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:43:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:43:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:43:59,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578764278] [2020-10-15 23:43:59,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596318381] [2020-10-15 23:43:59,584 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:43:59,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 23:43:59,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:43:59,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:43:59,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:43:59,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:43:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:43:59,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:43:59,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:43:59,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057640394] [2020-10-15 23:43:59,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:43:59,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:43:59,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:43:59,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:43:59,943 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:43:59,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 814 places, 1141 transitions, 94593 flow. Second operand 17 states. [2020-10-15 23:43:59,944 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:43:59,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:43:59,944 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:44:03,634 INFO L129 PetriNetUnfolder]: 811/2172 cut-off events. [2020-10-15 23:44:03,635 INFO L130 PetriNetUnfolder]: For 1035514/1035520 co-relation queries the response was YES. [2020-10-15 23:44:03,688 INFO L80 FinitePrefix]: Finished finitePrefix Result has 64389 conditions, 2172 events. 811/2172 cut-off events. For 1035514/1035520 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 20398 event pairs, 0 based on Foata normal form. 8/2180 useless extension candidates. Maximal degree in co-relation 64085. Up to 990 conditions per place. [2020-10-15 23:44:03,721 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 547 selfloop transitions, 610 changer transitions 0/1164 dead transitions. [2020-10-15 23:44:03,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 1164 transitions, 99233 flow [2020-10-15 23:44:03,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 23:44:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-15 23:44:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2249 transitions. [2020-10-15 23:44:03,725 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6780223093156467 [2020-10-15 23:44:03,725 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2249 transitions. [2020-10-15 23:44:03,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2249 transitions. [2020-10-15 23:44:03,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:44:03,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2249 transitions. [2020-10-15 23:44:03,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-15 23:44:03,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-15 23:44:03,728 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-15 23:44:03,728 INFO L185 Difference]: Start difference. First operand has 814 places, 1141 transitions, 94593 flow. Second operand 31 states and 2249 transitions. [2020-10-15 23:44:03,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 1164 transitions, 99233 flow [2020-10-15 23:44:10,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 820 places, 1164 transitions, 96565 flow, removed 1145 selfloop flow, removed 24 redundant places. [2020-10-15 23:44:10,179 INFO L241 Difference]: Finished difference. Result has 823 places, 1151 transitions, 95307 flow [2020-10-15 23:44:10,180 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=91931, PETRI_DIFFERENCE_MINUEND_PLACES=790, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=95307, PETRI_PLACES=823, PETRI_TRANSITIONS=1151} [2020-10-15 23:44:10,180 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 805 predicate places. [2020-10-15 23:44:10,180 INFO L481 AbstractCegarLoop]: Abstraction has has 823 places, 1151 transitions, 95307 flow [2020-10-15 23:44:10,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:44:10,181 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:44:10,181 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:44:10,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:44:10,381 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:44:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:44:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash -375543111, now seen corresponding path program 97 times [2020-10-15 23:44:10,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:44:10,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158710517] [2020-10-15 23:44:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:44:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:44:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:44:10,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158710517] [2020-10-15 23:44:10,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716750085] [2020-10-15 23:44:10,686 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:44:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:44:10,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:44:10,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:44:11,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 23:44:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:44:11,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:44:11,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:44:11,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804681812] [2020-10-15 23:44:11,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:44:11,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:44:11,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:44:11,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:44:11,229 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:44:11,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 1151 transitions, 95307 flow. Second operand 17 states. [2020-10-15 23:44:11,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:44:11,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:44:11,230 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:44:15,620 INFO L129 PetriNetUnfolder]: 816/2190 cut-off events. [2020-10-15 23:44:15,620 INFO L130 PetriNetUnfolder]: For 1008297/1008303 co-relation queries the response was YES. [2020-10-15 23:44:15,670 INFO L80 FinitePrefix]: Finished finitePrefix Result has 64800 conditions, 2190 events. 816/2190 cut-off events. For 1008297/1008303 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 20619 event pairs, 0 based on Foata normal form. 8/2198 useless extension candidates. Maximal degree in co-relation 64495. Up to 839 conditions per place. [2020-10-15 23:44:15,700 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 355 selfloop transitions, 806 changer transitions 0/1168 dead transitions. [2020-10-15 23:44:15,701 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 855 places, 1168 transitions, 99402 flow [2020-10-15 23:44:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 23:44:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-15 23:44:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2394 transitions. [2020-10-15 23:44:15,703 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6779949022939677 [2020-10-15 23:44:15,703 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2394 transitions. [2020-10-15 23:44:15,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2394 transitions. [2020-10-15 23:44:15,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:44:15,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2394 transitions. [2020-10-15 23:44:15,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-15 23:44:15,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-15 23:44:15,706 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-15 23:44:15,706 INFO L185 Difference]: Start difference. First operand has 823 places, 1151 transitions, 95307 flow. Second operand 33 states and 2394 transitions. [2020-10-15 23:44:15,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 855 places, 1168 transitions, 99402 flow [2020-10-15 23:44:21,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 830 places, 1168 transitions, 97944 flow, removed 547 selfloop flow, removed 25 redundant places. [2020-10-15 23:44:21,925 INFO L241 Difference]: Finished difference. Result has 833 places, 1158 transitions, 97179 flow [2020-10-15 23:44:21,925 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=93849, PETRI_DIFFERENCE_MINUEND_PLACES=798, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=97179, PETRI_PLACES=833, PETRI_TRANSITIONS=1158} [2020-10-15 23:44:21,925 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 815 predicate places. [2020-10-15 23:44:21,926 INFO L481 AbstractCegarLoop]: Abstraction has has 833 places, 1158 transitions, 97179 flow [2020-10-15 23:44:21,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:44:21,926 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:44:21,926 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:44:22,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:44:22,127 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:44:22,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:44:22,127 INFO L82 PathProgramCache]: Analyzing trace with hash -348522891, now seen corresponding path program 98 times [2020-10-15 23:44:22,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:44:22,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266308881] [2020-10-15 23:44:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:44:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:44:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:44:22,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266308881] [2020-10-15 23:44:22,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945156043] [2020-10-15 23:44:22,295 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:44:22,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 23:44:22,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:44:22,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:44:22,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:44:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:44:22,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:44:22,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:44:22,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343281346] [2020-10-15 23:44:22,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:44:22,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:44:22,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:44:22,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:44:22,678 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:44:22,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 833 places, 1158 transitions, 97179 flow. Second operand 17 states. [2020-10-15 23:44:22,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:44:22,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:44:22,679 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:44:26,391 INFO L129 PetriNetUnfolder]: 829/2224 cut-off events. [2020-10-15 23:44:26,391 INFO L130 PetriNetUnfolder]: For 1034296/1034302 co-relation queries the response was YES. [2020-10-15 23:44:26,441 INFO L80 FinitePrefix]: Finished finitePrefix Result has 66501 conditions, 2224 events. 829/2224 cut-off events. For 1034296/1034302 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 20984 event pairs, 0 based on Foata normal form. 7/2231 useless extension candidates. Maximal degree in co-relation 66192. Up to 1116 conditions per place. [2020-10-15 23:44:26,473 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 740 selfloop transitions, 462 changer transitions 0/1209 dead transitions. [2020-10-15 23:44:26,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 861 places, 1209 transitions, 102255 flow [2020-10-15 23:44:26,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 23:44:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 23:44:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2098 transitions. [2020-10-15 23:44:26,477 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6761198839832421 [2020-10-15 23:44:26,477 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2098 transitions. [2020-10-15 23:44:26,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2098 transitions. [2020-10-15 23:44:26,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:44:26,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2098 transitions. [2020-10-15 23:44:26,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-15 23:44:26,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-15 23:44:26,480 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-15 23:44:26,480 INFO L185 Difference]: Start difference. First operand has 833 places, 1158 transitions, 97179 flow. Second operand 29 states and 2098 transitions. [2020-10-15 23:44:26,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 861 places, 1209 transitions, 102255 flow [2020-10-15 23:44:33,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 834 places, 1209 transitions, 100438 flow, removed 604 selfloop flow, removed 27 redundant places. [2020-10-15 23:44:33,121 INFO L241 Difference]: Finished difference. Result has 835 places, 1171 transitions, 98191 flow [2020-10-15 23:44:33,122 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=95410, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=98191, PETRI_PLACES=835, PETRI_TRANSITIONS=1171} [2020-10-15 23:44:33,122 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 817 predicate places. [2020-10-15 23:44:33,122 INFO L481 AbstractCegarLoop]: Abstraction has has 835 places, 1171 transitions, 98191 flow [2020-10-15 23:44:33,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:44:33,123 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:44:33,123 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:44:33,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-15 23:44:33,324 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:44:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:44:33,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2096881378, now seen corresponding path program 99 times [2020-10-15 23:44:33,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:44:33,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278623074] [2020-10-15 23:44:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:44:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:44:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:44:33,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278623074] [2020-10-15 23:44:33,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011507693] [2020-10-15 23:44:33,507 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:44:33,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 23:44:33,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:44:33,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:44:33,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:44:33,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:44:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:44:33,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:44:33,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:44:33,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80867855] [2020-10-15 23:44:33,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:44:33,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:44:33,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:44:33,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:44:33,939 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:44:33,940 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 835 places, 1171 transitions, 98191 flow. Second operand 17 states. [2020-10-15 23:44:33,940 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:44:33,940 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:44:33,941 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:44:37,969 INFO L129 PetriNetUnfolder]: 848/2273 cut-off events. [2020-10-15 23:44:37,969 INFO L130 PetriNetUnfolder]: For 1120708/1120710 co-relation queries the response was YES. [2020-10-15 23:44:38,026 INFO L80 FinitePrefix]: Finished finitePrefix Result has 68776 conditions, 2273 events. 848/2273 cut-off events. For 1120708/1120710 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 21276 event pairs, 0 based on Foata normal form. 5/2278 useless extension candidates. Maximal degree in co-relation 68465. Up to 1131 conditions per place. [2020-10-15 23:44:38,063 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 579 selfloop transitions, 622 changer transitions 0/1208 dead transitions. [2020-10-15 23:44:38,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 865 places, 1208 transitions, 105143 flow [2020-10-15 23:44:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 23:44:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-15 23:44:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2250 transitions. [2020-10-15 23:44:38,068 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6783237865541152 [2020-10-15 23:44:38,069 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2250 transitions. [2020-10-15 23:44:38,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2250 transitions. [2020-10-15 23:44:38,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:44:38,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2250 transitions. [2020-10-15 23:44:38,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-15 23:44:38,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-15 23:44:38,072 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-15 23:44:38,072 INFO L185 Difference]: Start difference. First operand has 835 places, 1171 transitions, 98191 flow. Second operand 31 states and 2250 transitions. [2020-10-15 23:44:38,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 865 places, 1208 transitions, 105143 flow [2020-10-15 23:44:44,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 837 places, 1208 transitions, 104485 flow, removed 57 selfloop flow, removed 28 redundant places. [2020-10-15 23:44:44,361 INFO L241 Difference]: Finished difference. Result has 840 places, 1199 transitions, 103366 flow [2020-10-15 23:44:44,362 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=97541, PETRI_DIFFERENCE_MINUEND_PLACES=807, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=598, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=103366, PETRI_PLACES=840, PETRI_TRANSITIONS=1199} [2020-10-15 23:44:44,362 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 822 predicate places. [2020-10-15 23:44:44,362 INFO L481 AbstractCegarLoop]: Abstraction has has 840 places, 1199 transitions, 103366 flow [2020-10-15 23:44:44,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:44:44,362 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:44:44,362 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:44:44,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 23:44:44,570 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:44:44,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:44:44,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2097804899, now seen corresponding path program 100 times [2020-10-15 23:44:44,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:44:44,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896252213] [2020-10-15 23:44:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:44:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:44:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:44:44,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896252213] [2020-10-15 23:44:44,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677656782] [2020-10-15 23:44:44,752 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:44:44,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 23:44:44,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:44:44,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:44:44,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:44:45,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:44:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:44:45,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:44:45,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:44:45,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120580371] [2020-10-15 23:44:45,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:44:45,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:44:45,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:44:45,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:44:45,054 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:44:45,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 840 places, 1199 transitions, 103366 flow. Second operand 17 states. [2020-10-15 23:44:45,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:44:45,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:44:45,055 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:44:49,485 INFO L129 PetriNetUnfolder]: 862/2311 cut-off events. [2020-10-15 23:44:49,486 INFO L130 PetriNetUnfolder]: For 1177198/1177204 co-relation queries the response was YES. [2020-10-15 23:44:49,577 INFO L80 FinitePrefix]: Finished finitePrefix Result has 71186 conditions, 2311 events. 862/2311 cut-off events. For 1177198/1177204 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 21946 event pairs, 0 based on Foata normal form. 9/2320 useless extension candidates. Maximal degree in co-relation 70875. Up to 1105 conditions per place. [2020-10-15 23:44:49,615 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 556 selfloop transitions, 667 changer transitions 0/1230 dead transitions. [2020-10-15 23:44:49,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 872 places, 1230 transitions, 109451 flow [2020-10-15 23:44:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 23:44:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-15 23:44:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2395 transitions. [2020-10-15 23:44:49,619 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6782781081846503 [2020-10-15 23:44:49,619 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2395 transitions. [2020-10-15 23:44:49,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2395 transitions. [2020-10-15 23:44:49,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:44:49,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2395 transitions. [2020-10-15 23:44:49,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-15 23:44:49,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-15 23:44:49,623 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-15 23:44:49,623 INFO L185 Difference]: Start difference. First operand has 840 places, 1199 transitions, 103366 flow. Second operand 33 states and 2395 transitions. [2020-10-15 23:44:49,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 872 places, 1230 transitions, 109451 flow [2020-10-15 23:44:57,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 848 places, 1230 transitions, 107061 flow, removed 972 selfloop flow, removed 24 redundant places. [2020-10-15 23:44:57,419 INFO L241 Difference]: Finished difference. Result has 851 places, 1220 transitions, 105920 flow [2020-10-15 23:44:57,419 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=101044, PETRI_DIFFERENCE_MINUEND_PLACES=816, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=650, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=105920, PETRI_PLACES=851, PETRI_TRANSITIONS=1220} [2020-10-15 23:44:57,420 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 833 predicate places. [2020-10-15 23:44:57,420 INFO L481 AbstractCegarLoop]: Abstraction has has 851 places, 1220 transitions, 105920 flow [2020-10-15 23:44:57,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:44:57,420 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:44:57,420 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:44:57,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 23:44:57,621 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:44:57,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:44:57,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1046662468, now seen corresponding path program 101 times [2020-10-15 23:44:57,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:44:57,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376245366] [2020-10-15 23:44:57,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:44:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:44:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:44:57,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376245366] [2020-10-15 23:44:57,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390960816] [2020-10-15 23:44:57,822 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:44:57,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 23:44:57,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:44:57,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:44:57,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:44:58,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:44:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:44:58,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:44:58,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:44:58,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274320665] [2020-10-15 23:44:58,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:44:58,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:44:58,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:44:58,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:44:58,140 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:44:58,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 851 places, 1220 transitions, 105920 flow. Second operand 17 states. [2020-10-15 23:44:58,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:44:58,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:44:58,140 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:45:02,190 INFO L129 PetriNetUnfolder]: 888/2381 cut-off events. [2020-10-15 23:45:02,190 INFO L130 PetriNetUnfolder]: For 1226895/1226897 co-relation queries the response was YES. [2020-10-15 23:45:02,262 INFO L80 FinitePrefix]: Finished finitePrefix Result has 74376 conditions, 2381 events. 888/2381 cut-off events. For 1226895/1226897 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 22462 event pairs, 0 based on Foata normal form. 5/2386 useless extension candidates. Maximal degree in co-relation 74061. Up to 1237 conditions per place. [2020-10-15 23:45:02,309 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 635 selfloop transitions, 618 changer transitions 0/1260 dead transitions. [2020-10-15 23:45:02,309 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 885 places, 1260 transitions, 113993 flow [2020-10-15 23:45:02,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 23:45:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-15 23:45:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2540 transitions. [2020-10-15 23:45:02,316 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.678237650200267 [2020-10-15 23:45:02,316 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2540 transitions. [2020-10-15 23:45:02,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2540 transitions. [2020-10-15 23:45:02,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:45:02,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2540 transitions. [2020-10-15 23:45:02,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-15 23:45:02,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-15 23:45:02,321 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-15 23:45:02,321 INFO L185 Difference]: Start difference. First operand has 851 places, 1220 transitions, 105920 flow. Second operand 35 states and 2540 transitions. [2020-10-15 23:45:02,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 885 places, 1260 transitions, 113993 flow [2020-10-15 23:45:10,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 858 places, 1260 transitions, 112364 flow, removed 499 selfloop flow, removed 27 redundant places. [2020-10-15 23:45:10,967 INFO L241 Difference]: Finished difference. Result has 861 places, 1257 transitions, 111266 flow [2020-10-15 23:45:10,968 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=104309, PETRI_DIFFERENCE_MINUEND_PLACES=824, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=111266, PETRI_PLACES=861, PETRI_TRANSITIONS=1257} [2020-10-15 23:45:10,968 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 843 predicate places. [2020-10-15 23:45:10,968 INFO L481 AbstractCegarLoop]: Abstraction has has 861 places, 1257 transitions, 111266 flow [2020-10-15 23:45:10,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:45:10,968 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:45:10,968 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:45:11,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:45:11,176 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:45:11,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:45:11,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2125481699, now seen corresponding path program 102 times [2020-10-15 23:45:11,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:45:11,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691698508] [2020-10-15 23:45:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:45:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:45:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:45:11,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691698508] [2020-10-15 23:45:11,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613835627] [2020-10-15 23:45:11,387 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:45:11,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 23:45:11,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 23:45:11,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:45:11,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:45:11,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:45:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:45:11,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:45:11,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 23:45:11,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790184767] [2020-10-15 23:45:11,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 23:45:11,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:45:11,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 23:45:11,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 23:45:11,755 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:45:11,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 861 places, 1257 transitions, 111266 flow. Second operand 17 states. [2020-10-15 23:45:11,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:45:11,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:45:11,756 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:45:17,386 INFO L129 PetriNetUnfolder]: 894/2398 cut-off events. [2020-10-15 23:45:17,387 INFO L130 PetriNetUnfolder]: For 1224167/1224169 co-relation queries the response was YES. [2020-10-15 23:45:17,455 INFO L80 FinitePrefix]: Finished finitePrefix Result has 75534 conditions, 2398 events. 894/2398 cut-off events. For 1224167/1224169 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 22904 event pairs, 0 based on Foata normal form. 4/2402 useless extension candidates. Maximal degree in co-relation 75216. Up to 988 conditions per place. [2020-10-15 23:45:17,498 INFO L132 encePairwiseOnDemand]: 102/107 looper letters, 488 selfloop transitions, 780 changer transitions 0/1275 dead transitions. [2020-10-15 23:45:17,499 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 895 places, 1275 transitions, 115901 flow [2020-10-15 23:45:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 23:45:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-15 23:45:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2539 transitions. [2020-10-15 23:45:17,505 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6779706275033378 [2020-10-15 23:45:17,505 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2539 transitions. [2020-10-15 23:45:17,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2539 transitions. [2020-10-15 23:45:17,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-15 23:45:17,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2539 transitions. [2020-10-15 23:45:17,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-10-15 23:45:17,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-10-15 23:45:17,512 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-10-15 23:45:17,512 INFO L185 Difference]: Start difference. First operand has 861 places, 1257 transitions, 111266 flow. Second operand 35 states and 2539 transitions. [2020-10-15 23:45:17,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 895 places, 1275 transitions, 115901 flow [2020-10-15 23:45:25,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 866 places, 1275 transitions, 113080 flow, removed 1098 selfloop flow, removed 29 redundant places. [2020-10-15 23:45:25,963 INFO L241 Difference]: Finished difference. Result has 869 places, 1265 transitions, 112052 flow [2020-10-15 23:45:25,963 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=108447, PETRI_DIFFERENCE_MINUEND_PLACES=832, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=773, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=112052, PETRI_PLACES=869, PETRI_TRANSITIONS=1265} [2020-10-15 23:45:25,964 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 851 predicate places. [2020-10-15 23:45:25,964 INFO L481 AbstractCegarLoop]: Abstraction has has 869 places, 1265 transitions, 112052 flow [2020-10-15 23:45:25,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 23:45:25,964 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-15 23:45:25,964 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:45:26,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-15 23:45:26,175 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:45:26,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:45:26,175 INFO L82 PathProgramCache]: Analyzing trace with hash 2125510529, now seen corresponding path program 103 times [2020-10-15 23:45:26,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:45:26,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073043966] [2020-10-15 23:45:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:45:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:45:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:45:26,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073043966] [2020-10-15 23:45:26,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561422787] [2020-10-15 23:45:26,429 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:45:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:45:26,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 23:45:26,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:45:33,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 23:45:37,192 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-15 23:45:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:45:37,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:45:37,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 23:45:37,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620984919] [2020-10-15 23:45:37,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 23:45:37,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:45:37,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 23:45:37,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=223, Unknown=3, NotChecked=0, Total=306 [2020-10-15 23:45:37,197 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 107 [2020-10-15 23:45:37,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 869 places, 1265 transitions, 112052 flow. Second operand 18 states. [2020-10-15 23:45:37,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-15 23:45:37,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 107 [2020-10-15 23:45:37,198 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-15 23:45:41,547 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-15 23:45:46,125 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-15 23:45:50,811 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 23:45:55,336 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 52 DAG size of output: 40 Received shutdown request... [2020-10-15 23:45:57,634 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 23:45:57,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 23:45:57,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:45:57,861 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 23:45:57,867 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 23:45:57,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 11:45:57 BasicIcfg [2020-10-15 23:45:57,867 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 23:45:57,869 INFO L168 Benchmark]: Toolchain (without parser) took 860530.84 ms. Allocated memory was 250.6 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 205.7 MB in the beginning and 776.5 MB in the end (delta: -570.8 MB). Peak memory consumption was 2.0 GB. Max. memory is 14.2 GB. [2020-10-15 23:45:57,869 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 250.6 MB. Free memory is still 227.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 23:45:57,869 INFO L168 Benchmark]: CACSL2BoogieTranslator took 648.14 ms. Allocated memory was 250.6 MB in the beginning and 313.0 MB in the end (delta: 62.4 MB). Free memory was 205.7 MB in the beginning and 268.8 MB in the end (delta: -63.1 MB). Peak memory consumption was 29.5 MB. Max. memory is 14.2 GB. [2020-10-15 23:45:57,870 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.66 ms. Allocated memory is still 313.0 MB. Free memory was 268.8 MB in the beginning and 266.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 23:45:57,870 INFO L168 Benchmark]: Boogie Preprocessor took 29.12 ms. Allocated memory is still 313.0 MB. Free memory was 266.3 MB in the beginning and 263.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 23:45:57,870 INFO L168 Benchmark]: RCFGBuilder took 387.84 ms. Allocated memory is still 313.0 MB. Free memory was 263.8 MB in the beginning and 244.5 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-15 23:45:57,871 INFO L168 Benchmark]: TraceAbstraction took 859411.07 ms. Allocated memory was 313.0 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 244.5 MB in the beginning and 776.5 MB in the end (delta: -532.0 MB). Peak memory consumption was 1.9 GB. Max. memory is 14.2 GB. [2020-10-15 23:45:57,873 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 250.6 MB. Free memory is still 227.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 648.14 ms. Allocated memory was 250.6 MB in the beginning and 313.0 MB in the end (delta: 62.4 MB). Free memory was 205.7 MB in the beginning and 268.8 MB in the end (delta: -63.1 MB). Peak memory consumption was 29.5 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 49.66 ms. Allocated memory is still 313.0 MB. Free memory was 268.8 MB in the beginning and 266.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 29.12 ms. Allocated memory is still 313.0 MB. Free memory was 266.3 MB in the beginning and 263.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 387.84 ms. Allocated memory is still 313.0 MB. Free memory was 263.8 MB in the beginning and 244.5 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 859411.07 ms. Allocated memory was 313.0 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 244.5 MB in the beginning and 776.5 MB in the end (delta: -532.0 MB). Peak memory consumption was 1.9 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 711 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 21 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 57 PlacesBefore, 18 PlacesAfterwards, 55 TransitionsBefore, 13 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 50 TotalNumberOfCompositions, 1022 MoverChecksTotal - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 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: 859.3s, OverallIterations: 129, TraceHistogramMax: 6, AutomataDifference: 734.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 267 SDtfs, 2412 SDslu, 0 SDs, 0 SdLazy, 11236 SolverSat, 3398 SolverUnsat, 71 SolverUnknown, 0 SolverNotchecked, 158.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3843 GetRequests, 590 SyntacticMatches, 117 SemanticMatches, 3135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24194 ImplicationChecksByTransitivity, 362.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112052occurred in iteration=128, 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, 2.1s SatisfiabilityAnalysisTime, 90.8s InterpolantComputationTime, 3142 NumberOfCodeBlocks, 3142 NumberOfCodeBlocksAsserted, 393 NumberOfCheckSat, 2891 ConstructedInterpolants, 26 QuantifiedInterpolants, 325540 SizeOfPredicates, 122 NumberOfNonLiveVariables, 10611 ConjunctsInSsa, 1202 ConjunctsInUnsatCore, 251 InterpolantComputations, 7 PerfectInterpolantSequences, 0/1230 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