/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 16:24:53,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 16:24:53,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 16:24:54,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 16:24:54,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 16:24:54,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 16:24:54,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 16:24:54,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 16:24:54,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 16:24:54,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 16:24:54,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 16:24:54,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 16:24:54,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 16:24:54,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 16:24:54,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 16:24:54,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 16:24:54,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 16:24:54,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 16:24:54,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 16:24:54,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 16:24:54,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 16:24:54,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 16:24:54,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 16:24:54,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 16:24:54,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 16:24:54,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 16:24:54,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 16:24:54,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 16:24:54,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 16:24:54,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 16:24:54,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 16:24:54,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 16:24:54,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 16:24:54,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 16:24:54,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 16:24:54,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 16:24:54,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 16:24:54,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 16:24:54,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 16:24:54,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 16:24:54,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 16:24:54,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-11 16:24:54,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 16:24:54,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 16:24:54,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 16:24:54,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 16:24:54,082 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 16:24:54,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 16:24:54,082 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 16:24:54,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 16:24:54,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 16:24:54,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 16:24:54,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 16:24:54,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 16:24:54,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 16:24:54,084 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 16:24:54,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 16:24:54,088 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 16:24:54,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 16:24:54,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 16:24:54,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 16:24:54,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 16:24:54,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 16:24:54,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 16:24:54,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 16:24:54,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 16:24:54,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 16:24:54,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 16:24:54,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 16:24:54,091 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 16:24:54,091 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 16:24:54,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 16:24:54,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 16:24:54,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 16:24:54,422 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 16:24:54,424 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 16:24:54,424 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 16:24:54,425 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-10-11 16:24:54,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae1cd6d18/99e5dd6172a94a2ca3c508cadd8719d7/FLAG4c6326db4 [2020-10-11 16:24:55,055 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 16:24:55,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-10-11 16:24:55,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae1cd6d18/99e5dd6172a94a2ca3c508cadd8719d7/FLAG4c6326db4 [2020-10-11 16:24:55,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae1cd6d18/99e5dd6172a94a2ca3c508cadd8719d7 [2020-10-11 16:24:55,295 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 16:24:55,297 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 16:24:55,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 16:24:55,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 16:24:55,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 16:24:55,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 04:24:55" (1/1) ... [2020-10-11 16:24:55,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a4d7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:55, skipping insertion in model container [2020-10-11 16:24:55,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 04:24:55" (1/1) ... [2020-10-11 16:24:55,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 16:24:55,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 16:24:55,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 16:24:55,847 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 16:24:55,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 16:24:55,977 INFO L208 MainTranslator]: Completed translation [2020-10-11 16:24:55,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:55 WrapperNode [2020-10-11 16:24:55,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 16:24:55,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 16:24:55,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 16:24:55,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 16:24:55,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:55" (1/1) ... [2020-10-11 16:24:56,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:55" (1/1) ... [2020-10-11 16:24:56,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 16:24:56,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 16:24:56,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 16:24:56,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 16:24:56,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:55" (1/1) ... [2020-10-11 16:24:56,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:55" (1/1) ... [2020-10-11 16:24:56,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:55" (1/1) ... [2020-10-11 16:24:56,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:55" (1/1) ... [2020-10-11 16:24:56,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:55" (1/1) ... [2020-10-11 16:24:56,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:55" (1/1) ... [2020-10-11 16:24:56,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:55" (1/1) ... [2020-10-11 16:24:56,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 16:24:56,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 16:24:56,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 16:24:56,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 16:24:56,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 16:24:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-11 16:24:56,111 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-11 16:24:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-11 16:24:56,111 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-11 16:24:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 16:24:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-11 16:24:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 16:24:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 16:24:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-11 16:24:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 16:24:56,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 16:24:56,114 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 16:24:56,448 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 16:24:56,449 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 16:24:56,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 04:24:56 BoogieIcfgContainer [2020-10-11 16:24:56,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 16:24:56,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 16:24:56,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 16:24:56,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 16:24:56,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 04:24:55" (1/3) ... [2020-10-11 16:24:56,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653f5d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 04:24:56, skipping insertion in model container [2020-10-11 16:24:56,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 04:24:55" (2/3) ... [2020-10-11 16:24:56,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653f5d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 04:24:56, skipping insertion in model container [2020-10-11 16:24:56,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 04:24:56" (3/3) ... [2020-10-11 16:24:56,460 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-10-11 16:24:56,472 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 16:24:56,480 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 16:24:56,481 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 16:24:56,512 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,513 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,513 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,513 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,514 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,514 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,514 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,515 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,515 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,515 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,516 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,516 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,517 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,517 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,518 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,518 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,518 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,518 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,519 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,519 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,519 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,520 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,520 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,521 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,521 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,521 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,521 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,522 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,525 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,526 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,526 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,526 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,526 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,527 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,533 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,534 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,534 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 16:24:56,559 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 16:24:56,585 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 16:24:56,585 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 16:24:56,585 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 16:24:56,585 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 16:24:56,585 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 16:24:56,586 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 16:24:56,586 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 16:24:56,586 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 16:24:56,599 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-11 16:24:56,646 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-11 16:24:56,646 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:24:56,655 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. [2020-10-11 16:24:56,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 57 transitions, 124 flow [2020-10-11 16:24:56,662 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 116 flow [2020-10-11 16:24:56,677 INFO L129 PetriNetUnfolder]: 4/42 cut-off events. [2020-10-11 16:24:56,677 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:24:56,677 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:24:56,679 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:24:56,679 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:24:56,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:24:56,686 INFO L82 PathProgramCache]: Analyzing trace with hash -229509324, now seen corresponding path program 1 times [2020-10-11 16:24:56,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:24:56,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892187027] [2020-10-11 16:24:56,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:24:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:24:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:24:57,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892187027] [2020-10-11 16:24:57,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:24:57,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-11 16:24:57,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030531963] [2020-10-11 16:24:57,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 16:24:57,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:24:57,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 16:24:57,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 16:24:57,360 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:24:57,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 116 flow. Second operand 6 states. [2020-10-11 16:24:57,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:24:57,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:24:57,366 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:24:57,560 INFO L129 PetriNetUnfolder]: 44/200 cut-off events. [2020-10-11 16:24:57,561 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 16:24:57,563 INFO L80 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 200 events. 44/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 870 event pairs, 0 based on Foata normal form. 47/225 useless extension candidates. Maximal degree in co-relation 255. Up to 29 conditions per place. [2020-10-11 16:24:57,566 INFO L132 encePairwiseOnDemand]: 46/57 looper letters, 11 selfloop transitions, 9 changer transitions 23/79 dead transitions. [2020-10-11 16:24:57,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 236 flow [2020-10-11 16:24:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 16:24:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-11 16:24:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 510 transitions. [2020-10-11 16:24:57,585 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8947368421052632 [2020-10-11 16:24:57,586 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 510 transitions. [2020-10-11 16:24:57,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 510 transitions. [2020-10-11 16:24:57,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:24:57,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 510 transitions. [2020-10-11 16:24:57,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-11 16:24:57,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-11 16:24:57,606 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-11 16:24:57,608 INFO L185 Difference]: Start difference. First operand has 57 places, 55 transitions, 116 flow. Second operand 10 states and 510 transitions. [2020-10-11 16:24:57,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 236 flow [2020-10-11 16:24:57,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 16:24:57,619 INFO L241 Difference]: Finished difference. Result has 71 places, 53 transitions, 159 flow [2020-10-11 16:24:57,622 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=159, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2020-10-11 16:24:57,623 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2020-10-11 16:24:57,623 INFO L481 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 159 flow [2020-10-11 16:24:57,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 16:24:57,624 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:24:57,624 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:24:57,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 16:24:57,624 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:24:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:24:57,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2049778618, now seen corresponding path program 1 times [2020-10-11 16:24:57,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:24:57,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540901373] [2020-10-11 16:24:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:24:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:24:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:24:57,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540901373] [2020-10-11 16:24:57,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:24:57,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-11 16:24:57,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691943543] [2020-10-11 16:24:57,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 16:24:57,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:24:57,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 16:24:57,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-11 16:24:58,100 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:24:58,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 159 flow. Second operand 7 states. [2020-10-11 16:24:58,100 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:24:58,101 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:24:58,101 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:24:58,241 INFO L129 PetriNetUnfolder]: 36/162 cut-off events. [2020-10-11 16:24:58,241 INFO L130 PetriNetUnfolder]: For 88/94 co-relation queries the response was YES. [2020-10-11 16:24:58,243 INFO L80 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 162 events. 36/162 cut-off events. For 88/94 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 591 event pairs, 0 based on Foata normal form. 9/155 useless extension candidates. Maximal degree in co-relation 285. Up to 36 conditions per place. [2020-10-11 16:24:58,245 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 12 selfloop transitions, 17 changer transitions 8/73 dead transitions. [2020-10-11 16:24:58,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 73 transitions, 326 flow [2020-10-11 16:24:58,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 16:24:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-11 16:24:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 531 transitions. [2020-10-11 16:24:58,249 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.84688995215311 [2020-10-11 16:24:58,249 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 531 transitions. [2020-10-11 16:24:58,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 531 transitions. [2020-10-11 16:24:58,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:24:58,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 531 transitions. [2020-10-11 16:24:58,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-11 16:24:58,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-11 16:24:58,254 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-11 16:24:58,255 INFO L185 Difference]: Start difference. First operand has 71 places, 53 transitions, 159 flow. Second operand 11 states and 531 transitions. [2020-10-11 16:24:58,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 73 transitions, 326 flow [2020-10-11 16:24:58,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 73 transitions, 310 flow, removed 8 selfloop flow, removed 4 redundant places. [2020-10-11 16:24:58,261 INFO L241 Difference]: Finished difference. Result has 71 places, 61 transitions, 254 flow [2020-10-11 16:24:58,261 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=254, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2020-10-11 16:24:58,262 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2020-10-11 16:24:58,262 INFO L481 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 254 flow [2020-10-11 16:24:58,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 16:24:58,263 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:24:58,263 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:24:58,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 16:24:58,263 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:24:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:24:58,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1550799068, now seen corresponding path program 1 times [2020-10-11 16:24:58,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:24:58,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963706929] [2020-10-11 16:24:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:24:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:24:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:24:58,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963706929] [2020-10-11 16:24:58,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:24:58,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-11 16:24:58,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201471766] [2020-10-11 16:24:58,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 16:24:58,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:24:58,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 16:24:58,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-11 16:24:58,434 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:24:58,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 254 flow. Second operand 7 states. [2020-10-11 16:24:58,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:24:58,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:24:58,435 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:24:58,596 INFO L129 PetriNetUnfolder]: 39/182 cut-off events. [2020-10-11 16:24:58,596 INFO L130 PetriNetUnfolder]: For 234/242 co-relation queries the response was YES. [2020-10-11 16:24:58,599 INFO L80 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 182 events. 39/182 cut-off events. For 234/242 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 692 event pairs, 0 based on Foata normal form. 10/173 useless extension candidates. Maximal degree in co-relation 405. Up to 41 conditions per place. [2020-10-11 16:24:58,600 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 21 selfloop transitions, 11 changer transitions 10/78 dead transitions. [2020-10-11 16:24:58,601 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 460 flow [2020-10-11 16:24:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 16:24:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-11 16:24:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 531 transitions. [2020-10-11 16:24:58,604 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.84688995215311 [2020-10-11 16:24:58,604 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 531 transitions. [2020-10-11 16:24:58,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 531 transitions. [2020-10-11 16:24:58,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:24:58,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 531 transitions. [2020-10-11 16:24:58,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-11 16:24:58,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-11 16:24:58,609 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-11 16:24:58,609 INFO L185 Difference]: Start difference. First operand has 71 places, 61 transitions, 254 flow. Second operand 11 states and 531 transitions. [2020-10-11 16:24:58,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 460 flow [2020-10-11 16:24:58,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 78 transitions, 431 flow, removed 7 selfloop flow, removed 5 redundant places. [2020-10-11 16:24:58,616 INFO L241 Difference]: Finished difference. Result has 79 places, 64 transitions, 294 flow [2020-10-11 16:24:58,616 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=294, PETRI_PLACES=79, PETRI_TRANSITIONS=64} [2020-10-11 16:24:58,617 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2020-10-11 16:24:58,617 INFO L481 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 294 flow [2020-10-11 16:24:58,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 16:24:58,617 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:24:58,617 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:24:58,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 16:24:58,618 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:24:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:24:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash 772166854, now seen corresponding path program 2 times [2020-10-11 16:24:58,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:24:58,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144195183] [2020-10-11 16:24:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:24:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:24:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:24:58,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144195183] [2020-10-11 16:24:58,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:24:58,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-11 16:24:58,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405471027] [2020-10-11 16:24:58,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 16:24:58,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:24:58,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 16:24:58,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-11 16:24:58,984 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:24:58,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 64 transitions, 294 flow. Second operand 7 states. [2020-10-11 16:24:58,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:24:58,985 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:24:58,985 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:24:59,185 INFO L129 PetriNetUnfolder]: 43/210 cut-off events. [2020-10-11 16:24:59,185 INFO L130 PetriNetUnfolder]: For 446/469 co-relation queries the response was YES. [2020-10-11 16:24:59,187 INFO L80 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 210 events. 43/210 cut-off events. For 446/469 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 900 event pairs, 0 based on Foata normal form. 10/199 useless extension candidates. Maximal degree in co-relation 521. Up to 41 conditions per place. [2020-10-11 16:24:59,190 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 12 selfloop transitions, 26 changer transitions 10/84 dead transitions. [2020-10-11 16:24:59,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 84 transitions, 576 flow [2020-10-11 16:24:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 16:24:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-11 16:24:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 674 transitions. [2020-10-11 16:24:59,197 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8446115288220551 [2020-10-11 16:24:59,198 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 674 transitions. [2020-10-11 16:24:59,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 674 transitions. [2020-10-11 16:24:59,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:24:59,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 674 transitions. [2020-10-11 16:24:59,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-11 16:24:59,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-11 16:24:59,211 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-11 16:24:59,211 INFO L185 Difference]: Start difference. First operand has 79 places, 64 transitions, 294 flow. Second operand 14 states and 674 transitions. [2020-10-11 16:24:59,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 84 transitions, 576 flow [2020-10-11 16:24:59,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 84 transitions, 548 flow, removed 6 selfloop flow, removed 5 redundant places. [2020-10-11 16:24:59,221 INFO L241 Difference]: Finished difference. Result has 90 places, 70 transitions, 408 flow [2020-10-11 16:24:59,222 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=408, PETRI_PLACES=90, PETRI_TRANSITIONS=70} [2020-10-11 16:24:59,222 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2020-10-11 16:24:59,222 INFO L481 AbstractCegarLoop]: Abstraction has has 90 places, 70 transitions, 408 flow [2020-10-11 16:24:59,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 16:24:59,222 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:24:59,222 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:24:59,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 16:24:59,223 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:24:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:24:59,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1767615312, now seen corresponding path program 1 times [2020-10-11 16:24:59,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:24:59,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566029619] [2020-10-11 16:24:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:24:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:24:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:24:59,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566029619] [2020-10-11 16:24:59,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:24:59,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-11 16:24:59,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910487455] [2020-10-11 16:24:59,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 16:24:59,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:24:59,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 16:24:59,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-11 16:24:59,620 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:24:59,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 70 transitions, 408 flow. Second operand 8 states. [2020-10-11 16:24:59,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:24:59,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:24:59,621 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:24:59,780 INFO L129 PetriNetUnfolder]: 45/228 cut-off events. [2020-10-11 16:24:59,780 INFO L130 PetriNetUnfolder]: For 769/801 co-relation queries the response was YES. [2020-10-11 16:24:59,782 INFO L80 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 228 events. 45/228 cut-off events. For 769/801 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 998 event pairs, 0 based on Foata normal form. 10/215 useless extension candidates. Maximal degree in co-relation 631. Up to 44 conditions per place. [2020-10-11 16:24:59,784 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 23 selfloop transitions, 18 changer transitions 10/87 dead transitions. [2020-10-11 16:24:59,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 87 transitions, 714 flow [2020-10-11 16:24:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 16:24:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-11 16:24:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 625 transitions. [2020-10-11 16:24:59,787 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8434547908232118 [2020-10-11 16:24:59,787 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 625 transitions. [2020-10-11 16:24:59,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 625 transitions. [2020-10-11 16:24:59,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:24:59,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 625 transitions. [2020-10-11 16:24:59,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-11 16:24:59,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-11 16:24:59,792 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-11 16:24:59,792 INFO L185 Difference]: Start difference. First operand has 90 places, 70 transitions, 408 flow. Second operand 13 states and 625 transitions. [2020-10-11 16:24:59,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 87 transitions, 714 flow [2020-10-11 16:24:59,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 87 transitions, 596 flow, removed 36 selfloop flow, removed 11 redundant places. [2020-10-11 16:24:59,799 INFO L241 Difference]: Finished difference. Result has 93 places, 73 transitions, 422 flow [2020-10-11 16:24:59,799 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=422, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2020-10-11 16:24:59,800 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 36 predicate places. [2020-10-11 16:24:59,800 INFO L481 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 422 flow [2020-10-11 16:24:59,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 16:24:59,800 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:24:59,800 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:24:59,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-11 16:24:59,801 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:24:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:24:59,801 INFO L82 PathProgramCache]: Analyzing trace with hash 613295442, now seen corresponding path program 2 times [2020-10-11 16:24:59,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:24:59,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847818312] [2020-10-11 16:24:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:24:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:24:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:24:59,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847818312] [2020-10-11 16:24:59,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:24:59,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-11 16:24:59,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414170861] [2020-10-11 16:24:59,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 16:24:59,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:24:59,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 16:24:59,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-11 16:25:00,186 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:00,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 422 flow. Second operand 8 states. [2020-10-11 16:25:00,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:00,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:00,187 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:00,398 INFO L129 PetriNetUnfolder]: 47/232 cut-off events. [2020-10-11 16:25:00,398 INFO L130 PetriNetUnfolder]: For 834/882 co-relation queries the response was YES. [2020-10-11 16:25:00,400 INFO L80 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 232 events. 47/232 cut-off events. For 834/882 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1024 event pairs, 0 based on Foata normal form. 12/219 useless extension candidates. Maximal degree in co-relation 653. Up to 47 conditions per place. [2020-10-11 16:25:00,402 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 15 selfloop transitions, 29 changer transitions 10/90 dead transitions. [2020-10-11 16:25:00,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 90 transitions, 740 flow [2020-10-11 16:25:00,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 16:25:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-11 16:25:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 768 transitions. [2020-10-11 16:25:00,405 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8421052631578947 [2020-10-11 16:25:00,405 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 768 transitions. [2020-10-11 16:25:00,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 768 transitions. [2020-10-11 16:25:00,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:00,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 768 transitions. [2020-10-11 16:25:00,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-11 16:25:00,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-11 16:25:00,410 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-11 16:25:00,410 INFO L185 Difference]: Start difference. First operand has 93 places, 73 transitions, 422 flow. Second operand 16 states and 768 transitions. [2020-10-11 16:25:00,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 90 transitions, 740 flow [2020-10-11 16:25:00,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 90 transitions, 664 flow, removed 22 selfloop flow, removed 9 redundant places. [2020-10-11 16:25:00,416 INFO L241 Difference]: Finished difference. Result has 101 places, 76 transitions, 492 flow [2020-10-11 16:25:00,417 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=492, PETRI_PLACES=101, PETRI_TRANSITIONS=76} [2020-10-11 16:25:00,417 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2020-10-11 16:25:00,417 INFO L481 AbstractCegarLoop]: Abstraction has has 101 places, 76 transitions, 492 flow [2020-10-11 16:25:00,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 16:25:00,417 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:00,417 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:00,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-11 16:25:00,418 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:00,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:00,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1784971164, now seen corresponding path program 3 times [2020-10-11 16:25:00,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:00,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782309215] [2020-10-11 16:25:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:00,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782309215] [2020-10-11 16:25:00,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 16:25:00,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-11 16:25:00,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922053603] [2020-10-11 16:25:00,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 16:25:00,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:00,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 16:25:00,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-11 16:25:00,795 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:00,796 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 76 transitions, 492 flow. Second operand 8 states. [2020-10-11 16:25:00,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:00,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:00,796 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:01,127 INFO L129 PetriNetUnfolder]: 70/363 cut-off events. [2020-10-11 16:25:01,127 INFO L130 PetriNetUnfolder]: For 1617/1677 co-relation queries the response was YES. [2020-10-11 16:25:01,130 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1121 conditions, 363 events. 70/363 cut-off events. For 1617/1677 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2119 event pairs, 0 based on Foata normal form. 15/342 useless extension candidates. Maximal degree in co-relation 1071. Up to 78 conditions per place. [2020-10-11 16:25:01,134 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 12 selfloop transitions, 50 changer transitions 13/111 dead transitions. [2020-10-11 16:25:01,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 111 transitions, 1086 flow [2020-10-11 16:25:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 16:25:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 16:25:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 913 transitions. [2020-10-11 16:25:01,138 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8430286241920592 [2020-10-11 16:25:01,138 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 913 transitions. [2020-10-11 16:25:01,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 913 transitions. [2020-10-11 16:25:01,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:01,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 913 transitions. [2020-10-11 16:25:01,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 16:25:01,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 16:25:01,145 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 16:25:01,145 INFO L185 Difference]: Start difference. First operand has 101 places, 76 transitions, 492 flow. Second operand 19 states and 913 transitions. [2020-10-11 16:25:01,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 111 transitions, 1086 flow [2020-10-11 16:25:01,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 111 transitions, 938 flow, removed 50 selfloop flow, removed 12 redundant places. [2020-10-11 16:25:01,156 INFO L241 Difference]: Finished difference. Result has 113 places, 94 transitions, 770 flow [2020-10-11 16:25:01,156 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=770, PETRI_PLACES=113, PETRI_TRANSITIONS=94} [2020-10-11 16:25:01,156 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2020-10-11 16:25:01,156 INFO L481 AbstractCegarLoop]: Abstraction has has 113 places, 94 transitions, 770 flow [2020-10-11 16:25:01,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 16:25:01,157 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:01,157 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:01,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-11 16:25:01,157 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:01,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:01,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1361085773, now seen corresponding path program 1 times [2020-10-11 16:25:01,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:01,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607586890] [2020-10-11 16:25:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:01,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607586890] [2020-10-11 16:25:01,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632566402] [2020-10-11 16:25:01,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:01,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 16:25:01,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:01,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:01,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:01,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-10-11 16:25:01,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790555652] [2020-10-11 16:25:01,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:25:01,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:01,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:25:01,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:25:01,853 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:01,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 94 transitions, 770 flow. Second operand 14 states. [2020-10-11 16:25:01,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:01,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:01,854 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:02,130 INFO L129 PetriNetUnfolder]: 69/384 cut-off events. [2020-10-11 16:25:02,130 INFO L130 PetriNetUnfolder]: For 1862/1904 co-relation queries the response was YES. [2020-10-11 16:25:02,133 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 384 events. 69/384 cut-off events. For 1862/1904 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2222 event pairs, 0 based on Foata normal form. 11/356 useless extension candidates. Maximal degree in co-relation 1188. Up to 79 conditions per place. [2020-10-11 16:25:02,137 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 38 selfloop transitions, 30 changer transitions 13/117 dead transitions. [2020-10-11 16:25:02,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 117 transitions, 1285 flow [2020-10-11 16:25:02,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 16:25:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-11 16:25:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 815 transitions. [2020-10-11 16:25:02,141 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8410732714138287 [2020-10-11 16:25:02,141 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 815 transitions. [2020-10-11 16:25:02,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 815 transitions. [2020-10-11 16:25:02,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:02,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 815 transitions. [2020-10-11 16:25:02,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-11 16:25:02,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-11 16:25:02,147 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-11 16:25:02,147 INFO L185 Difference]: Start difference. First operand has 113 places, 94 transitions, 770 flow. Second operand 17 states and 815 transitions. [2020-10-11 16:25:02,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 117 transitions, 1285 flow [2020-10-11 16:25:02,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 117 transitions, 1131 flow, removed 57 selfloop flow, removed 12 redundant places. [2020-10-11 16:25:02,161 INFO L241 Difference]: Finished difference. Result has 120 places, 98 transitions, 801 flow [2020-10-11 16:25:02,162 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=801, PETRI_PLACES=120, PETRI_TRANSITIONS=98} [2020-10-11 16:25:02,162 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2020-10-11 16:25:02,162 INFO L481 AbstractCegarLoop]: Abstraction has has 120 places, 98 transitions, 801 flow [2020-10-11 16:25:02,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:25:02,162 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:02,162 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:02,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-10-11 16:25:02,376 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:02,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2091247303, now seen corresponding path program 2 times [2020-10-11 16:25:02,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:02,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801655447] [2020-10-11 16:25:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:02,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801655447] [2020-10-11 16:25:02,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61937969] [2020-10-11 16:25:02,521 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:02,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:25:02,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:02,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:25:02,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:02,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:02,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:02,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-10-11 16:25:02,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944184937] [2020-10-11 16:25:02,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:25:02,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:02,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:25:02,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:25:02,996 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:02,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 98 transitions, 801 flow. Second operand 14 states. [2020-10-11 16:25:02,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:02,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:02,997 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:03,191 INFO L129 PetriNetUnfolder]: 67/389 cut-off events. [2020-10-11 16:25:03,192 INFO L130 PetriNetUnfolder]: For 1624/1675 co-relation queries the response was YES. [2020-10-11 16:25:03,195 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1198 conditions, 389 events. 67/389 cut-off events. For 1624/1675 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2295 event pairs, 0 based on Foata normal form. 8/356 useless extension candidates. Maximal degree in co-relation 1137. Up to 77 conditions per place. [2020-10-11 16:25:03,198 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 31 selfloop transitions, 41 changer transitions 5/113 dead transitions. [2020-10-11 16:25:03,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 113 transitions, 1185 flow [2020-10-11 16:25:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 16:25:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-11 16:25:03,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 717 transitions. [2020-10-11 16:25:03,201 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8385964912280702 [2020-10-11 16:25:03,201 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 717 transitions. [2020-10-11 16:25:03,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 717 transitions. [2020-10-11 16:25:03,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:03,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 717 transitions. [2020-10-11 16:25:03,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-11 16:25:03,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-11 16:25:03,205 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-11 16:25:03,205 INFO L185 Difference]: Start difference. First operand has 120 places, 98 transitions, 801 flow. Second operand 15 states and 717 transitions. [2020-10-11 16:25:03,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 113 transitions, 1185 flow [2020-10-11 16:25:03,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 113 transitions, 1116 flow, removed 21 selfloop flow, removed 11 redundant places. [2020-10-11 16:25:03,218 INFO L241 Difference]: Finished difference. Result has 122 places, 102 transitions, 912 flow [2020-10-11 16:25:03,218 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=912, PETRI_PLACES=122, PETRI_TRANSITIONS=102} [2020-10-11 16:25:03,218 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 65 predicate places. [2020-10-11 16:25:03,218 INFO L481 AbstractCegarLoop]: Abstraction has has 122 places, 102 transitions, 912 flow [2020-10-11 16:25:03,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:25:03,219 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:03,219 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:03,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:03,434 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:03,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:03,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2060051577, now seen corresponding path program 3 times [2020-10-11 16:25:03,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:03,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686484031] [2020-10-11 16:25:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:03,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686484031] [2020-10-11 16:25:03,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4344815] [2020-10-11 16:25:03,561 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:03,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 16:25:03,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:03,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:25:03,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:03,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:25:03,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:03,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:03,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-10-11 16:25:03,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791837344] [2020-10-11 16:25:03,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 16:25:03,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:03,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 16:25:03,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-11 16:25:04,060 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:04,060 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 102 transitions, 912 flow. Second operand 14 states. [2020-10-11 16:25:04,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:04,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:04,061 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:04,998 INFO L129 PetriNetUnfolder]: 123/718 cut-off events. [2020-10-11 16:25:04,998 INFO L130 PetriNetUnfolder]: For 4042/4126 co-relation queries the response was YES. [2020-10-11 16:25:05,006 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2356 conditions, 718 events. 123/718 cut-off events. For 4042/4126 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5251 event pairs, 0 based on Foata normal form. 27/672 useless extension candidates. Maximal degree in co-relation 2295. Up to 150 conditions per place. [2020-10-11 16:25:05,013 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 13 selfloop transitions, 112 changer transitions 25/186 dead transitions. [2020-10-11 16:25:05,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 186 transitions, 2466 flow [2020-10-11 16:25:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 16:25:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-11 16:25:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1772 transitions. [2020-10-11 16:25:05,018 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8402086296823139 [2020-10-11 16:25:05,018 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1772 transitions. [2020-10-11 16:25:05,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1772 transitions. [2020-10-11 16:25:05,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:05,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1772 transitions. [2020-10-11 16:25:05,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-11 16:25:05,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-11 16:25:05,026 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-11 16:25:05,026 INFO L185 Difference]: Start difference. First operand has 122 places, 102 transitions, 912 flow. Second operand 37 states and 1772 transitions. [2020-10-11 16:25:05,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 186 transitions, 2466 flow [2020-10-11 16:25:05,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 186 transitions, 2305 flow, removed 31 selfloop flow, removed 13 redundant places. [2020-10-11 16:25:05,052 INFO L241 Difference]: Finished difference. Result has 159 places, 159 transitions, 1874 flow [2020-10-11 16:25:05,052 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1874, PETRI_PLACES=159, PETRI_TRANSITIONS=159} [2020-10-11 16:25:05,053 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 102 predicate places. [2020-10-11 16:25:05,053 INFO L481 AbstractCegarLoop]: Abstraction has has 159 places, 159 transitions, 1874 flow [2020-10-11 16:25:05,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 16:25:05,053 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:05,053 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:05,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-11 16:25:05,268 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:05,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1240873424, now seen corresponding path program 4 times [2020-10-11 16:25:05,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:05,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271392278] [2020-10-11 16:25:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:05,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271392278] [2020-10-11 16:25:05,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353039603] [2020-10-11 16:25:05,399 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:05,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:25:05,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:05,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:25:05,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:05,599 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:05,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:05,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-10-11 16:25:05,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799397187] [2020-10-11 16:25:05,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:25:05,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:05,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:25:05,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:25:05,994 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:05,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 159 transitions, 1874 flow. Second operand 16 states. [2020-10-11 16:25:05,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:05,995 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:05,995 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:06,327 INFO L129 PetriNetUnfolder]: 111/709 cut-off events. [2020-10-11 16:25:06,327 INFO L130 PetriNetUnfolder]: For 4386/4448 co-relation queries the response was YES. [2020-10-11 16:25:06,334 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2397 conditions, 709 events. 111/709 cut-off events. For 4386/4448 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5260 event pairs, 0 based on Foata normal form. 10/645 useless extension candidates. Maximal degree in co-relation 2323. Up to 144 conditions per place. [2020-10-11 16:25:06,339 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 92 selfloop transitions, 49 changer transitions 5/182 dead transitions. [2020-10-11 16:25:06,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 182 transitions, 2609 flow [2020-10-11 16:25:06,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 16:25:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-11 16:25:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 810 transitions. [2020-10-11 16:25:06,341 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8359133126934984 [2020-10-11 16:25:06,342 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 810 transitions. [2020-10-11 16:25:06,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 810 transitions. [2020-10-11 16:25:06,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:06,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 810 transitions. [2020-10-11 16:25:06,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-11 16:25:06,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-11 16:25:06,347 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-11 16:25:06,347 INFO L185 Difference]: Start difference. First operand has 159 places, 159 transitions, 1874 flow. Second operand 17 states and 810 transitions. [2020-10-11 16:25:06,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 182 transitions, 2609 flow [2020-10-11 16:25:06,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 182 transitions, 2025 flow, removed 253 selfloop flow, removed 24 redundant places. [2020-10-11 16:25:06,381 INFO L241 Difference]: Finished difference. Result has 147 places, 167 transitions, 1679 flow [2020-10-11 16:25:06,381 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1679, PETRI_PLACES=147, PETRI_TRANSITIONS=167} [2020-10-11 16:25:06,381 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 90 predicate places. [2020-10-11 16:25:06,382 INFO L481 AbstractCegarLoop]: Abstraction has has 147 places, 167 transitions, 1679 flow [2020-10-11 16:25:06,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:25:06,382 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:06,382 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:06,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:06,596 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:06,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1385506802, now seen corresponding path program 5 times [2020-10-11 16:25:06,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:06,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950873574] [2020-10-11 16:25:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:06,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950873574] [2020-10-11 16:25:06,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947876739] [2020-10-11 16:25:06,717 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 [2020-10-11 16:25:06,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 16:25:06,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:06,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:25:06,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:06,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:06,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:06,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-10-11 16:25:06,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684035041] [2020-10-11 16:25:06,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:25:06,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:06,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:25:06,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:25:07,349 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:07,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 167 transitions, 1679 flow. Second operand 16 states. [2020-10-11 16:25:07,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:07,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:07,350 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:07,722 INFO L129 PetriNetUnfolder]: 114/729 cut-off events. [2020-10-11 16:25:07,722 INFO L130 PetriNetUnfolder]: For 2635/2695 co-relation queries the response was YES. [2020-10-11 16:25:07,728 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2066 conditions, 729 events. 114/729 cut-off events. For 2635/2695 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5494 event pairs, 0 based on Foata normal form. 10/662 useless extension candidates. Maximal degree in co-relation 2000. Up to 126 conditions per place. [2020-10-11 16:25:07,733 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 77 selfloop transitions, 69 changer transitions 5/187 dead transitions. [2020-10-11 16:25:07,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 187 transitions, 2264 flow [2020-10-11 16:25:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 16:25:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-11 16:25:07,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 952 transitions. [2020-10-11 16:25:07,744 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8350877192982457 [2020-10-11 16:25:07,744 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 952 transitions. [2020-10-11 16:25:07,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 952 transitions. [2020-10-11 16:25:07,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:07,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 952 transitions. [2020-10-11 16:25:07,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-11 16:25:07,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-11 16:25:07,748 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-11 16:25:07,748 INFO L185 Difference]: Start difference. First operand has 147 places, 167 transitions, 1679 flow. Second operand 20 states and 952 transitions. [2020-10-11 16:25:07,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 187 transitions, 2264 flow [2020-10-11 16:25:07,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 187 transitions, 2191 flow, removed 17 selfloop flow, removed 11 redundant places. [2020-10-11 16:25:07,773 INFO L241 Difference]: Finished difference. Result has 158 places, 172 transitions, 1889 flow [2020-10-11 16:25:07,774 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1889, PETRI_PLACES=158, PETRI_TRANSITIONS=172} [2020-10-11 16:25:07,774 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 101 predicate places. [2020-10-11 16:25:07,774 INFO L481 AbstractCegarLoop]: Abstraction has has 158 places, 172 transitions, 1889 flow [2020-10-11 16:25:07,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:25:07,774 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:07,774 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:07,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-11 16:25:07,988 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:07,988 INFO L82 PathProgramCache]: Analyzing trace with hash 2066167406, now seen corresponding path program 6 times [2020-10-11 16:25:07,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:07,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530179022] [2020-10-11 16:25:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:08,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530179022] [2020-10-11 16:25:08,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143093614] [2020-10-11 16:25:08,116 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 [2020-10-11 16:25:08,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 16:25:08,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:08,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:25:08,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:08,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:08,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:08,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:08,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-10-11 16:25:08,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326444978] [2020-10-11 16:25:08,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:25:08,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:08,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:25:08,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:25:08,819 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:08,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 172 transitions, 1889 flow. Second operand 15 states. [2020-10-11 16:25:08,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:08,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:08,820 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:09,527 INFO L129 PetriNetUnfolder]: 156/1000 cut-off events. [2020-10-11 16:25:09,528 INFO L130 PetriNetUnfolder]: For 4715/4794 co-relation queries the response was YES. [2020-10-11 16:25:09,537 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2958 conditions, 1000 events. 156/1000 cut-off events. For 4715/4794 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8080 event pairs, 0 based on Foata normal form. 32/928 useless extension candidates. Maximal degree in co-relation 2889. Up to 127 conditions per place. [2020-10-11 16:25:09,544 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 30 selfloop transitions, 157 changer transitions 11/234 dead transitions. [2020-10-11 16:25:09,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 234 transitions, 3158 flow [2020-10-11 16:25:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 16:25:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-11 16:25:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1340 transitions. [2020-10-11 16:25:09,547 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8395989974937343 [2020-10-11 16:25:09,547 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1340 transitions. [2020-10-11 16:25:09,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1340 transitions. [2020-10-11 16:25:09,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:09,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1340 transitions. [2020-10-11 16:25:09,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-11 16:25:09,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-11 16:25:09,553 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-11 16:25:09,553 INFO L185 Difference]: Start difference. First operand has 158 places, 172 transitions, 1889 flow. Second operand 28 states and 1340 transitions. [2020-10-11 16:25:09,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 234 transitions, 3158 flow [2020-10-11 16:25:09,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 234 transitions, 2976 flow, removed 40 selfloop flow, removed 16 redundant places. [2020-10-11 16:25:09,591 INFO L241 Difference]: Finished difference. Result has 175 places, 220 transitions, 2753 flow [2020-10-11 16:25:09,592 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2753, PETRI_PLACES=175, PETRI_TRANSITIONS=220} [2020-10-11 16:25:09,592 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 118 predicate places. [2020-10-11 16:25:09,592 INFO L481 AbstractCegarLoop]: Abstraction has has 175 places, 220 transitions, 2753 flow [2020-10-11 16:25:09,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:25:09,592 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:09,592 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:09,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:09,807 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:09,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:09,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1024241530, now seen corresponding path program 7 times [2020-10-11 16:25:09,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:09,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825994226] [2020-10-11 16:25:09,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:09,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825994226] [2020-10-11 16:25:09,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262365197] [2020-10-11 16:25:09,938 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 [2020-10-11 16:25:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:09,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:25:09,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:10,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:10,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:10,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-10-11 16:25:10,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765309533] [2020-10-11 16:25:10,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:25:10,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:10,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:25:10,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:25:10,900 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:10,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 220 transitions, 2753 flow. Second operand 16 states. [2020-10-11 16:25:10,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:10,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:10,901 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:11,444 INFO L129 PetriNetUnfolder]: 156/1053 cut-off events. [2020-10-11 16:25:11,444 INFO L130 PetriNetUnfolder]: For 4539/4608 co-relation queries the response was YES. [2020-10-11 16:25:11,455 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3230 conditions, 1053 events. 156/1053 cut-off events. For 4539/4608 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8746 event pairs, 0 based on Foata normal form. 10/952 useless extension candidates. Maximal degree in co-relation 3155. Up to 171 conditions per place. [2020-10-11 16:25:11,462 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 101 selfloop transitions, 107 changer transitions 5/249 dead transitions. [2020-10-11 16:25:11,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 249 transitions, 3635 flow [2020-10-11 16:25:11,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 16:25:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-11 16:25:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1142 transitions. [2020-10-11 16:25:11,465 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8347953216374269 [2020-10-11 16:25:11,465 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1142 transitions. [2020-10-11 16:25:11,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1142 transitions. [2020-10-11 16:25:11,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:11,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1142 transitions. [2020-10-11 16:25:11,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-11 16:25:11,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-11 16:25:11,469 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-11 16:25:11,469 INFO L185 Difference]: Start difference. First operand has 175 places, 220 transitions, 2753 flow. Second operand 24 states and 1142 transitions. [2020-10-11 16:25:11,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 249 transitions, 3635 flow [2020-10-11 16:25:11,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 249 transitions, 3431 flow, removed 59 selfloop flow, removed 18 redundant places. [2020-10-11 16:25:11,514 INFO L241 Difference]: Finished difference. Result has 181 places, 232 transitions, 3067 flow [2020-10-11 16:25:11,514 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2566, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3067, PETRI_PLACES=181, PETRI_TRANSITIONS=232} [2020-10-11 16:25:11,514 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 124 predicate places. [2020-10-11 16:25:11,515 INFO L481 AbstractCegarLoop]: Abstraction has has 181 places, 232 transitions, 3067 flow [2020-10-11 16:25:11,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:25:11,515 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:11,515 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:11,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-11 16:25:11,728 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash 54235774, now seen corresponding path program 8 times [2020-10-11 16:25:11,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:11,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746800068] [2020-10-11 16:25:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:11,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746800068] [2020-10-11 16:25:11,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529047919] [2020-10-11 16:25:11,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:11,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:25:11,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:11,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:25:11,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:12,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:12,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:12,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-10-11 16:25:12,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461817779] [2020-10-11 16:25:12,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:25:12,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:12,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:25:12,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:25:12,339 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:12,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 232 transitions, 3067 flow. Second operand 16 states. [2020-10-11 16:25:12,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:12,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:12,340 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:12,945 INFO L129 PetriNetUnfolder]: 170/1128 cut-off events. [2020-10-11 16:25:12,945 INFO L130 PetriNetUnfolder]: For 5808/5916 co-relation queries the response was YES. [2020-10-11 16:25:12,954 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 1128 events. 170/1128 cut-off events. For 5808/5916 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 9494 event pairs, 0 based on Foata normal form. 20/1029 useless extension candidates. Maximal degree in co-relation 3541. Up to 166 conditions per place. [2020-10-11 16:25:12,961 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 84 selfloop transitions, 136 changer transitions 13/269 dead transitions. [2020-10-11 16:25:12,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 269 transitions, 4191 flow [2020-10-11 16:25:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 16:25:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-11 16:25:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1385 transitions. [2020-10-11 16:25:12,964 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.837870538415003 [2020-10-11 16:25:12,964 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1385 transitions. [2020-10-11 16:25:12,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1385 transitions. [2020-10-11 16:25:12,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:12,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1385 transitions. [2020-10-11 16:25:12,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-11 16:25:12,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-11 16:25:12,969 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-11 16:25:12,969 INFO L185 Difference]: Start difference. First operand has 181 places, 232 transitions, 3067 flow. Second operand 29 states and 1385 transitions. [2020-10-11 16:25:12,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 269 transitions, 4191 flow [2020-10-11 16:25:13,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 269 transitions, 4071 flow, removed 20 selfloop flow, removed 17 redundant places. [2020-10-11 16:25:13,010 INFO L241 Difference]: Finished difference. Result has 199 places, 243 transitions, 3552 flow [2020-10-11 16:25:13,011 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3552, PETRI_PLACES=199, PETRI_TRANSITIONS=243} [2020-10-11 16:25:13,011 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 142 predicate places. [2020-10-11 16:25:13,011 INFO L481 AbstractCegarLoop]: Abstraction has has 199 places, 243 transitions, 3552 flow [2020-10-11 16:25:13,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:25:13,012 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:13,012 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:13,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 16:25:13,225 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:13,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:13,226 INFO L82 PathProgramCache]: Analyzing trace with hash 943140904, now seen corresponding path program 9 times [2020-10-11 16:25:13,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:13,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276711032] [2020-10-11 16:25:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:13,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276711032] [2020-10-11 16:25:13,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370473343] [2020-10-11 16:25:13,348 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:13,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 16:25:13,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:13,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:25:13,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:13,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:13,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:13,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-10-11 16:25:13,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391110271] [2020-10-11 16:25:13,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:25:13,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:13,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:25:13,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:25:13,982 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:13,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 243 transitions, 3552 flow. Second operand 15 states. [2020-10-11 16:25:13,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:13,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:13,984 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:14,695 INFO L129 PetriNetUnfolder]: 195/1307 cut-off events. [2020-10-11 16:25:14,695 INFO L130 PetriNetUnfolder]: For 7691/7800 co-relation queries the response was YES. [2020-10-11 16:25:14,711 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4339 conditions, 1307 events. 195/1307 cut-off events. For 7691/7800 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11531 event pairs, 0 based on Foata normal form. 34/1203 useless extension candidates. Maximal degree in co-relation 4257. Up to 181 conditions per place. [2020-10-11 16:25:14,722 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 45 selfloop transitions, 211 changer transitions 11/303 dead transitions. [2020-10-11 16:25:14,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 303 transitions, 5101 flow [2020-10-11 16:25:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 16:25:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-11 16:25:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1435 transitions. [2020-10-11 16:25:14,724 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8391812865497076 [2020-10-11 16:25:14,725 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1435 transitions. [2020-10-11 16:25:14,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1435 transitions. [2020-10-11 16:25:14,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:14,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1435 transitions. [2020-10-11 16:25:14,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 31 states. [2020-10-11 16:25:14,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 31 states. [2020-10-11 16:25:14,730 INFO L81 ComplementDD]: Finished complementDD. Result 31 states. [2020-10-11 16:25:14,730 INFO L185 Difference]: Start difference. First operand has 199 places, 243 transitions, 3552 flow. Second operand 30 states and 1435 transitions. [2020-10-11 16:25:14,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 303 transitions, 5101 flow [2020-10-11 16:25:14,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 303 transitions, 4912 flow, removed 33 selfloop flow, removed 23 redundant places. [2020-10-11 16:25:14,818 INFO L241 Difference]: Finished difference. Result has 208 places, 287 transitions, 4664 flow [2020-10-11 16:25:14,819 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3377, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4664, PETRI_PLACES=208, PETRI_TRANSITIONS=287} [2020-10-11 16:25:14,819 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 151 predicate places. [2020-10-11 16:25:14,819 INFO L481 AbstractCegarLoop]: Abstraction has has 208 places, 287 transitions, 4664 flow [2020-10-11 16:25:14,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:25:14,819 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:14,819 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:15,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-11 16:25:15,032 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1413832736, now seen corresponding path program 10 times [2020-10-11 16:25:15,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:15,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059597209] [2020-10-11 16:25:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:15,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059597209] [2020-10-11 16:25:15,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627093964] [2020-10-11 16:25:15,172 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:15,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:25:15,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:15,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:25:15,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:15,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:15,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:15,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:15,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-10-11 16:25:15,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142125491] [2020-10-11 16:25:15,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 16:25:15,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:15,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 16:25:15,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-11 16:25:15,901 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:15,902 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 287 transitions, 4664 flow. Second operand 15 states. [2020-10-11 16:25:15,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:15,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:15,902 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:16,496 INFO L129 PetriNetUnfolder]: 212/1451 cut-off events. [2020-10-11 16:25:16,496 INFO L130 PetriNetUnfolder]: For 9880/9998 co-relation queries the response was YES. [2020-10-11 16:25:16,506 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5197 conditions, 1451 events. 212/1451 cut-off events. For 9880/9998 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13150 event pairs, 0 based on Foata normal form. 22/1320 useless extension candidates. Maximal degree in co-relation 5111. Up to 289 conditions per place. [2020-10-11 16:25:16,517 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 168 selfloop transitions, 116 changer transitions 11/331 dead transitions. [2020-10-11 16:25:16,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 331 transitions, 6235 flow [2020-10-11 16:25:16,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 16:25:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-11 16:25:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1245 transitions. [2020-10-11 16:25:16,519 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.840080971659919 [2020-10-11 16:25:16,519 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1245 transitions. [2020-10-11 16:25:16,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1245 transitions. [2020-10-11 16:25:16,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:16,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1245 transitions. [2020-10-11 16:25:16,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-11 16:25:16,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-11 16:25:16,523 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-11 16:25:16,523 INFO L185 Difference]: Start difference. First operand has 208 places, 287 transitions, 4664 flow. Second operand 26 states and 1245 transitions. [2020-10-11 16:25:16,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 331 transitions, 6235 flow [2020-10-11 16:25:16,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 331 transitions, 5987 flow, removed 55 selfloop flow, removed 24 redundant places. [2020-10-11 16:25:16,579 INFO L241 Difference]: Finished difference. Result has 212 places, 315 transitions, 5291 flow [2020-10-11 16:25:16,580 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=4424, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5291, PETRI_PLACES=212, PETRI_TRANSITIONS=315} [2020-10-11 16:25:16,580 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 155 predicate places. [2020-10-11 16:25:16,580 INFO L481 AbstractCegarLoop]: Abstraction has has 212 places, 315 transitions, 5291 flow [2020-10-11 16:25:16,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 16:25:16,581 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:16,581 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:16,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 16:25:16,796 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:16,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1655852898, now seen corresponding path program 1 times [2020-10-11 16:25:16,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:16,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945488172] [2020-10-11 16:25:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:16,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945488172] [2020-10-11 16:25:16,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93916243] [2020-10-11 16:25:16,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:25:16,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:17,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:17,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:17,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-10-11 16:25:17,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360126569] [2020-10-11 16:25:17,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:25:17,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:17,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:25:17,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:25:17,498 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:17,499 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 315 transitions, 5291 flow. Second operand 16 states. [2020-10-11 16:25:17,499 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:17,499 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:17,499 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:18,089 INFO L129 PetriNetUnfolder]: 217/1482 cut-off events. [2020-10-11 16:25:18,089 INFO L130 PetriNetUnfolder]: For 10866/10998 co-relation queries the response was YES. [2020-10-11 16:25:18,100 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5476 conditions, 1482 events. 217/1482 cut-off events. For 10866/10998 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13504 event pairs, 0 based on Foata normal form. 16/1342 useless extension candidates. Maximal degree in co-relation 5387. Up to 311 conditions per place. [2020-10-11 16:25:18,108 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 238 selfloop transitions, 68 changer transitions 13/355 dead transitions. [2020-10-11 16:25:18,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 355 transitions, 6787 flow [2020-10-11 16:25:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 16:25:18,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-11 16:25:18,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1050 transitions. [2020-10-11 16:25:18,111 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8373205741626795 [2020-10-11 16:25:18,111 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1050 transitions. [2020-10-11 16:25:18,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1050 transitions. [2020-10-11 16:25:18,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:18,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1050 transitions. [2020-10-11 16:25:18,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-11 16:25:18,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-11 16:25:18,114 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-11 16:25:18,114 INFO L185 Difference]: Start difference. First operand has 212 places, 315 transitions, 5291 flow. Second operand 22 states and 1050 transitions. [2020-10-11 16:25:18,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 355 transitions, 6787 flow [2020-10-11 16:25:18,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 355 transitions, 6535 flow, removed 81 selfloop flow, removed 17 redundant places. [2020-10-11 16:25:18,176 INFO L241 Difference]: Finished difference. Result has 222 places, 322 transitions, 5410 flow [2020-10-11 16:25:18,176 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5410, PETRI_PLACES=222, PETRI_TRANSITIONS=322} [2020-10-11 16:25:18,176 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 165 predicate places. [2020-10-11 16:25:18,176 INFO L481 AbstractCegarLoop]: Abstraction has has 222 places, 322 transitions, 5410 flow [2020-10-11 16:25:18,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:25:18,176 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:18,177 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:18,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 16:25:18,378 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:18,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:18,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1931790828, now seen corresponding path program 2 times [2020-10-11 16:25:18,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:18,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387246176] [2020-10-11 16:25:18,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:18,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387246176] [2020-10-11 16:25:18,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513626949] [2020-10-11 16:25:18,508 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:18,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:25:18,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:18,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:25:18,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:18,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:18,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:18,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-10-11 16:25:18,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581403688] [2020-10-11 16:25:18,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:25:18,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:18,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:25:18,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:25:19,171 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:19,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 322 transitions, 5410 flow. Second operand 16 states. [2020-10-11 16:25:19,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:19,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:19,172 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:19,616 INFO L129 PetriNetUnfolder]: 213/1476 cut-off events. [2020-10-11 16:25:19,617 INFO L130 PetriNetUnfolder]: For 10307/10424 co-relation queries the response was YES. [2020-10-11 16:25:19,626 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5414 conditions, 1476 events. 213/1476 cut-off events. For 10307/10424 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13536 event pairs, 0 based on Foata normal form. 13/1333 useless extension candidates. Maximal degree in co-relation 5318. Up to 313 conditions per place. [2020-10-11 16:25:19,635 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 239 selfloop transitions, 68 changer transitions 5/348 dead transitions. [2020-10-11 16:25:19,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 348 transitions, 6552 flow [2020-10-11 16:25:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 16:25:19,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 16:25:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 904 transitions. [2020-10-11 16:25:19,642 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8347183748845799 [2020-10-11 16:25:19,642 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 904 transitions. [2020-10-11 16:25:19,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 904 transitions. [2020-10-11 16:25:19,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:19,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 904 transitions. [2020-10-11 16:25:19,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 16:25:19,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 16:25:19,646 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 16:25:19,647 INFO L185 Difference]: Start difference. First operand has 222 places, 322 transitions, 5410 flow. Second operand 19 states and 904 transitions. [2020-10-11 16:25:19,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 348 transitions, 6552 flow [2020-10-11 16:25:19,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 348 transitions, 6463 flow, removed 25 selfloop flow, removed 13 redundant places. [2020-10-11 16:25:19,738 INFO L241 Difference]: Finished difference. Result has 227 places, 325 transitions, 5590 flow [2020-10-11 16:25:19,739 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=5331, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5590, PETRI_PLACES=227, PETRI_TRANSITIONS=325} [2020-10-11 16:25:19,739 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 170 predicate places. [2020-10-11 16:25:19,739 INFO L481 AbstractCegarLoop]: Abstraction has has 227 places, 325 transitions, 5590 flow [2020-10-11 16:25:19,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:25:19,739 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:19,739 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:19,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:19,940 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:19,941 INFO L82 PathProgramCache]: Analyzing trace with hash 834204948, now seen corresponding path program 3 times [2020-10-11 16:25:19,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:19,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036034049] [2020-10-11 16:25:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:20,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036034049] [2020-10-11 16:25:20,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317484485] [2020-10-11 16:25:20,057 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:20,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 16:25:20,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:20,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:25:20,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:20,233 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:20,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:20,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-10-11 16:25:20,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326925967] [2020-10-11 16:25:20,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:25:20,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:20,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:25:20,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:25:20,681 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:20,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 325 transitions, 5590 flow. Second operand 16 states. [2020-10-11 16:25:20,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:20,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:20,683 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:21,198 INFO L129 PetriNetUnfolder]: 214/1478 cut-off events. [2020-10-11 16:25:21,198 INFO L130 PetriNetUnfolder]: For 11259/11385 co-relation queries the response was YES. [2020-10-11 16:25:21,209 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5533 conditions, 1478 events. 214/1478 cut-off events. For 11259/11385 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13522 event pairs, 0 based on Foata normal form. 13/1334 useless extension candidates. Maximal degree in co-relation 5436. Up to 288 conditions per place. [2020-10-11 16:25:21,218 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 214 selfloop transitions, 96 changer transitions 5/351 dead transitions. [2020-10-11 16:25:21,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 351 transitions, 6744 flow [2020-10-11 16:25:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 16:25:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-11 16:25:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 999 transitions. [2020-10-11 16:25:21,221 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8345864661654135 [2020-10-11 16:25:21,221 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 999 transitions. [2020-10-11 16:25:21,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 999 transitions. [2020-10-11 16:25:21,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:21,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 999 transitions. [2020-10-11 16:25:21,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-11 16:25:21,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-11 16:25:21,225 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-11 16:25:21,225 INFO L185 Difference]: Start difference. First operand has 227 places, 325 transitions, 5590 flow. Second operand 21 states and 999 transitions. [2020-10-11 16:25:21,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 351 transitions, 6744 flow [2020-10-11 16:25:21,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 351 transitions, 6641 flow, removed 9 selfloop flow, removed 13 redundant places. [2020-10-11 16:25:21,307 INFO L241 Difference]: Finished difference. Result has 237 places, 328 transitions, 5839 flow [2020-10-11 16:25:21,307 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=5497, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5839, PETRI_PLACES=237, PETRI_TRANSITIONS=328} [2020-10-11 16:25:21,307 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 180 predicate places. [2020-10-11 16:25:21,307 INFO L481 AbstractCegarLoop]: Abstraction has has 237 places, 328 transitions, 5839 flow [2020-10-11 16:25:21,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:25:21,308 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:21,308 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:21,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-10-11 16:25:21,509 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:21,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1386441160, now seen corresponding path program 4 times [2020-10-11 16:25:21,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:21,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337676827] [2020-10-11 16:25:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:21,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337676827] [2020-10-11 16:25:21,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756674773] [2020-10-11 16:25:21,661 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:21,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:25:21,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:21,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:25:21,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:21,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:21,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:21,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:21,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-10-11 16:25:21,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667336056] [2020-10-11 16:25:21,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:25:21,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:21,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:25:21,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:25:22,360 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:22,360 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 328 transitions, 5839 flow. Second operand 16 states. [2020-10-11 16:25:22,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:22,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:22,361 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:23,772 INFO L129 PetriNetUnfolder]: 276/1883 cut-off events. [2020-10-11 16:25:23,773 INFO L130 PetriNetUnfolder]: For 19600/19796 co-relation queries the response was YES. [2020-10-11 16:25:23,837 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7356 conditions, 1883 events. 276/1883 cut-off events. For 19600/19796 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18151 event pairs, 0 based on Foata normal form. 58/1743 useless extension candidates. Maximal degree in co-relation 7256. Up to 274 conditions per place. [2020-10-11 16:25:23,844 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 78 selfloop transitions, 290 changer transitions 28/432 dead transitions. [2020-10-11 16:25:23,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 432 transitions, 9152 flow [2020-10-11 16:25:23,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-11 16:25:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-11 16:25:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2248 transitions. [2020-10-11 16:25:23,847 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8391190742814483 [2020-10-11 16:25:23,847 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2248 transitions. [2020-10-11 16:25:23,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2248 transitions. [2020-10-11 16:25:23,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:23,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2248 transitions. [2020-10-11 16:25:23,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-11 16:25:23,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-11 16:25:23,852 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-11 16:25:23,852 INFO L185 Difference]: Start difference. First operand has 237 places, 328 transitions, 5839 flow. Second operand 47 states and 2248 transitions. [2020-10-11 16:25:23,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 432 transitions, 9152 flow [2020-10-11 16:25:23,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 432 transitions, 8895 flow, removed 34 selfloop flow, removed 18 redundant places. [2020-10-11 16:25:23,941 INFO L241 Difference]: Finished difference. Result has 282 places, 397 transitions, 7890 flow [2020-10-11 16:25:23,942 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=5671, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=7890, PETRI_PLACES=282, PETRI_TRANSITIONS=397} [2020-10-11 16:25:23,942 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 225 predicate places. [2020-10-11 16:25:23,942 INFO L481 AbstractCegarLoop]: Abstraction has has 282 places, 397 transitions, 7890 flow [2020-10-11 16:25:23,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:25:23,942 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:23,943 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:24,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:24,154 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:24,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:24,154 INFO L82 PathProgramCache]: Analyzing trace with hash -858451628, now seen corresponding path program 5 times [2020-10-11 16:25:24,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:24,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172553692] [2020-10-11 16:25:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:24,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172553692] [2020-10-11 16:25:24,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877450412] [2020-10-11 16:25:24,294 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:24,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 16:25:24,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:24,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:25:24,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:24,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:24,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:24,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-10-11 16:25:24,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450550040] [2020-10-11 16:25:24,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:25:24,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:24,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:25:24,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:25:24,972 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:24,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 397 transitions, 7890 flow. Second operand 16 states. [2020-10-11 16:25:24,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:24,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:24,974 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:26,053 INFO L129 PetriNetUnfolder]: 269/1897 cut-off events. [2020-10-11 16:25:26,054 INFO L130 PetriNetUnfolder]: For 18518/18683 co-relation queries the response was YES. [2020-10-11 16:25:26,079 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7667 conditions, 1897 events. 269/1897 cut-off events. For 18518/18683 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18367 event pairs, 0 based on Foata normal form. 20/1715 useless extension candidates. Maximal degree in co-relation 7551. Up to 315 conditions per place. [2020-10-11 16:25:26,094 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 218 selfloop transitions, 178 changer transitions 5/437 dead transitions. [2020-10-11 16:25:26,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 437 transitions, 9653 flow [2020-10-11 16:25:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 16:25:26,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-11 16:25:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1332 transitions. [2020-10-11 16:25:26,097 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8345864661654135 [2020-10-11 16:25:26,097 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1332 transitions. [2020-10-11 16:25:26,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1332 transitions. [2020-10-11 16:25:26,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:26,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1332 transitions. [2020-10-11 16:25:26,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-11 16:25:26,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-11 16:25:26,102 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-11 16:25:26,102 INFO L185 Difference]: Start difference. First operand has 282 places, 397 transitions, 7890 flow. Second operand 28 states and 1332 transitions. [2020-10-11 16:25:26,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 437 transitions, 9653 flow [2020-10-11 16:25:26,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 437 transitions, 8867 flow, removed 295 selfloop flow, removed 32 redundant places. [2020-10-11 16:25:26,249 INFO L241 Difference]: Finished difference. Result has 272 places, 407 transitions, 7940 flow [2020-10-11 16:25:26,249 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=7216, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7940, PETRI_PLACES=272, PETRI_TRANSITIONS=407} [2020-10-11 16:25:26,249 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 215 predicate places. [2020-10-11 16:25:26,249 INFO L481 AbstractCegarLoop]: Abstraction has has 272 places, 407 transitions, 7940 flow [2020-10-11 16:25:26,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:25:26,250 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:26,250 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:26,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-11 16:25:26,451 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:26,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1507574228, now seen corresponding path program 6 times [2020-10-11 16:25:26,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:26,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406031617] [2020-10-11 16:25:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:26,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406031617] [2020-10-11 16:25:26,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930916348] [2020-10-11 16:25:26,590 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:26,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 16:25:26,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:26,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 16:25:26,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:26,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:26,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:26,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:26,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-10-11 16:25:26,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617955053] [2020-10-11 16:25:26,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 16:25:26,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:26,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 16:25:26,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-11 16:25:27,057 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:27,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 407 transitions, 7940 flow. Second operand 16 states. [2020-10-11 16:25:27,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:27,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:27,059 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:28,375 INFO L129 PetriNetUnfolder]: 307/2148 cut-off events. [2020-10-11 16:25:28,375 INFO L130 PetriNetUnfolder]: For 23761/23971 co-relation queries the response was YES. [2020-10-11 16:25:28,392 INFO L80 FinitePrefix]: Finished finitePrefix Result has 8736 conditions, 2148 events. 307/2148 cut-off events. For 23761/23971 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21525 event pairs, 0 based on Foata normal form. 60/1981 useless extension candidates. Maximal degree in co-relation 8625. Up to 332 conditions per place. [2020-10-11 16:25:28,403 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 60 selfloop transitions, 371 changer transitions 17/484 dead transitions. [2020-10-11 16:25:28,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 484 transitions, 10947 flow [2020-10-11 16:25:28,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-11 16:25:28,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-11 16:25:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2148 transitions. [2020-10-11 16:25:28,406 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8374269005847953 [2020-10-11 16:25:28,407 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2148 transitions. [2020-10-11 16:25:28,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2148 transitions. [2020-10-11 16:25:28,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:28,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2148 transitions. [2020-10-11 16:25:28,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 46 states. [2020-10-11 16:25:28,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 46 states. [2020-10-11 16:25:28,413 INFO L81 ComplementDD]: Finished complementDD. Result 46 states. [2020-10-11 16:25:28,414 INFO L185 Difference]: Start difference. First operand has 272 places, 407 transitions, 7940 flow. Second operand 45 states and 2148 transitions. [2020-10-11 16:25:28,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 484 transitions, 10947 flow [2020-10-11 16:25:28,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 484 transitions, 10733 flow, removed 51 selfloop flow, removed 21 redundant places. [2020-10-11 16:25:28,576 INFO L241 Difference]: Finished difference. Result has 305 places, 454 transitions, 9975 flow [2020-10-11 16:25:28,577 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=7770, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=9975, PETRI_PLACES=305, PETRI_TRANSITIONS=454} [2020-10-11 16:25:28,577 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 248 predicate places. [2020-10-11 16:25:28,577 INFO L481 AbstractCegarLoop]: Abstraction has has 305 places, 454 transitions, 9975 flow [2020-10-11 16:25:28,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 16:25:28,577 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:28,577 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:28,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:28,778 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:28,779 INFO L82 PathProgramCache]: Analyzing trace with hash 344395941, now seen corresponding path program 11 times [2020-10-11 16:25:28,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:28,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709904208] [2020-10-11 16:25:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:28,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709904208] [2020-10-11 16:25:28,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429500315] [2020-10-11 16:25:28,932 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 [2020-10-11 16:25:28,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 16:25:28,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:28,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:25:28,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:29,178 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:29,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:29,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-10-11 16:25:29,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316729058] [2020-10-11 16:25:29,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 16:25:29,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:29,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 16:25:29,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-11 16:25:29,347 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:29,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 454 transitions, 9975 flow. Second operand 18 states. [2020-10-11 16:25:29,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:29,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:29,349 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:29,941 INFO L129 PetriNetUnfolder]: 300/2131 cut-off events. [2020-10-11 16:25:29,941 INFO L130 PetriNetUnfolder]: For 22627/22816 co-relation queries the response was YES. [2020-10-11 16:25:29,959 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9163 conditions, 2131 events. 300/2131 cut-off events. For 22627/22816 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 21366 event pairs, 0 based on Foata normal form. 10/1915 useless extension candidates. Maximal degree in co-relation 9042. Up to 466 conditions per place. [2020-10-11 16:25:29,970 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 366 selfloop transitions, 78 changer transitions 5/485 dead transitions. [2020-10-11 16:25:29,970 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 485 transitions, 11634 flow [2020-10-11 16:25:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 16:25:29,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-11 16:25:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 857 transitions. [2020-10-11 16:25:29,972 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8352826510721247 [2020-10-11 16:25:29,972 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 857 transitions. [2020-10-11 16:25:29,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 857 transitions. [2020-10-11 16:25:29,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:29,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 857 transitions. [2020-10-11 16:25:29,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-11 16:25:29,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-11 16:25:29,976 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-11 16:25:29,976 INFO L185 Difference]: Start difference. First operand has 305 places, 454 transitions, 9975 flow. Second operand 18 states and 857 transitions. [2020-10-11 16:25:29,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 485 transitions, 11634 flow [2020-10-11 16:25:30,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 485 transitions, 11176 flow, removed 161 selfloop flow, removed 29 redundant places. [2020-10-11 16:25:30,190 INFO L241 Difference]: Finished difference. Result has 290 places, 455 transitions, 9778 flow [2020-10-11 16:25:30,190 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=9537, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9778, PETRI_PLACES=290, PETRI_TRANSITIONS=455} [2020-10-11 16:25:30,190 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 233 predicate places. [2020-10-11 16:25:30,190 INFO L481 AbstractCegarLoop]: Abstraction has has 290 places, 455 transitions, 9778 flow [2020-10-11 16:25:30,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 16:25:30,191 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:30,191 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:30,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-11 16:25:30,392 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:30,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:30,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1605019417, now seen corresponding path program 12 times [2020-10-11 16:25:30,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:30,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528685894] [2020-10-11 16:25:30,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:30,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528685894] [2020-10-11 16:25:30,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466712755] [2020-10-11 16:25:30,547 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 [2020-10-11 16:25:30,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 16:25:30,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:30,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 16:25:30,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:30,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:30,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:30,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-10-11 16:25:30,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332631007] [2020-10-11 16:25:30,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 16:25:30,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:30,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 16:25:30,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-11 16:25:31,324 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:31,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 455 transitions, 9778 flow. Second operand 18 states. [2020-10-11 16:25:31,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:31,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:31,326 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:31,871 INFO L129 PetriNetUnfolder]: 301/2133 cut-off events. [2020-10-11 16:25:31,871 INFO L130 PetriNetUnfolder]: For 22813/23010 co-relation queries the response was YES. [2020-10-11 16:25:31,889 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9104 conditions, 2133 events. 301/2133 cut-off events. For 22813/23010 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21427 event pairs, 0 based on Foata normal form. 10/1916 useless extension candidates. Maximal degree in co-relation 8985. Up to 440 conditions per place. [2020-10-11 16:25:31,902 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 338 selfloop transitions, 107 changer transitions 5/486 dead transitions. [2020-10-11 16:25:31,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 486 transitions, 11439 flow [2020-10-11 16:25:31,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 16:25:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 16:25:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 905 transitions. [2020-10-11 16:25:31,904 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8356417359187442 [2020-10-11 16:25:31,905 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 905 transitions. [2020-10-11 16:25:31,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 905 transitions. [2020-10-11 16:25:31,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:31,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 905 transitions. [2020-10-11 16:25:31,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 16:25:31,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 16:25:31,908 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 16:25:31,908 INFO L185 Difference]: Start difference. First operand has 290 places, 455 transitions, 9778 flow. Second operand 19 states and 905 transitions. [2020-10-11 16:25:31,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 486 transitions, 11439 flow [2020-10-11 16:25:32,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 486 transitions, 11305 flow, removed 10 selfloop flow, removed 15 redundant places. [2020-10-11 16:25:32,090 INFO L241 Difference]: Finished difference. Result has 294 places, 456 transitions, 9977 flow [2020-10-11 16:25:32,091 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=9654, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9977, PETRI_PLACES=294, PETRI_TRANSITIONS=456} [2020-10-11 16:25:32,091 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 237 predicate places. [2020-10-11 16:25:32,091 INFO L481 AbstractCegarLoop]: Abstraction has has 294 places, 456 transitions, 9977 flow [2020-10-11 16:25:32,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 16:25:32,091 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:32,091 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:32,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-11 16:25:32,292 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:32,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:32,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1496277609, now seen corresponding path program 13 times [2020-10-11 16:25:32,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:32,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712630971] [2020-10-11 16:25:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:32,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712630971] [2020-10-11 16:25:32,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292461347] [2020-10-11 16:25:32,467 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 [2020-10-11 16:25:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:32,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:25:32,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:32,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:32,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:32,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:32,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-10-11 16:25:32,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827233215] [2020-10-11 16:25:32,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 16:25:32,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:32,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 16:25:32,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-10-11 16:25:33,015 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:33,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 456 transitions, 9977 flow. Second operand 18 states. [2020-10-11 16:25:33,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:33,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:33,016 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:34,694 INFO L129 PetriNetUnfolder]: 366/2566 cut-off events. [2020-10-11 16:25:34,694 INFO L130 PetriNetUnfolder]: For 36893/37157 co-relation queries the response was YES. [2020-10-11 16:25:34,717 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11435 conditions, 2566 events. 366/2566 cut-off events. For 36893/37157 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 26787 event pairs, 0 based on Foata normal form. 62/2357 useless extension candidates. Maximal degree in co-relation 11315. Up to 419 conditions per place. [2020-10-11 16:25:34,729 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 67 selfloop transitions, 442 changer transitions 17/562 dead transitions. [2020-10-11 16:25:34,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 562 transitions, 14119 flow [2020-10-11 16:25:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-11 16:25:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 16:25:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2434 transitions. [2020-10-11 16:25:34,732 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8372893016855865 [2020-10-11 16:25:34,732 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2434 transitions. [2020-10-11 16:25:34,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2434 transitions. [2020-10-11 16:25:34,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:34,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2434 transitions. [2020-10-11 16:25:34,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 52 states. [2020-10-11 16:25:34,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 52 states. [2020-10-11 16:25:34,739 INFO L81 ComplementDD]: Finished complementDD. Result 52 states. [2020-10-11 16:25:34,739 INFO L185 Difference]: Start difference. First operand has 294 places, 456 transitions, 9977 flow. Second operand 51 states and 2434 transitions. [2020-10-11 16:25:34,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 562 transitions, 14119 flow [2020-10-11 16:25:34,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 562 transitions, 13880 flow, removed 42 selfloop flow, removed 15 redundant places. [2020-10-11 16:25:34,972 INFO L241 Difference]: Finished difference. Result has 340 places, 534 transitions, 13080 flow [2020-10-11 16:25:34,972 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=9820, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=13080, PETRI_PLACES=340, PETRI_TRANSITIONS=534} [2020-10-11 16:25:34,973 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 283 predicate places. [2020-10-11 16:25:34,973 INFO L481 AbstractCegarLoop]: Abstraction has has 340 places, 534 transitions, 13080 flow [2020-10-11 16:25:34,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 16:25:34,973 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:34,973 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:35,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-11 16:25:35,187 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:35,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:35,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1476173785, now seen corresponding path program 7 times [2020-10-11 16:25:35,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:35,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977188429] [2020-10-11 16:25:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:35,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977188429] [2020-10-11 16:25:35,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524350622] [2020-10-11 16:25:35,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:35,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:25:35,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:36,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:36,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:36,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-10-11 16:25:36,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73364684] [2020-10-11 16:25:36,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 16:25:36,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 16:25:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 16:25:36,556 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:36,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 534 transitions, 13080 flow. Second operand 17 states. [2020-10-11 16:25:36,557 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:36,557 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:36,558 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:37,354 INFO L129 PetriNetUnfolder]: 360/2588 cut-off events. [2020-10-11 16:25:37,355 INFO L130 PetriNetUnfolder]: For 33211/33468 co-relation queries the response was YES. [2020-10-11 16:25:37,378 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11880 conditions, 2588 events. 360/2588 cut-off events. For 33211/33468 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 27291 event pairs, 0 based on Foata normal form. 12/2325 useless extension candidates. Maximal degree in co-relation 11749. Up to 551 conditions per place. [2020-10-11 16:25:37,388 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 432 selfloop transitions, 107 changer transitions 5/580 dead transitions. [2020-10-11 16:25:37,388 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 580 transitions, 15365 flow [2020-10-11 16:25:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 16:25:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 16:25:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 904 transitions. [2020-10-11 16:25:37,389 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8347183748845799 [2020-10-11 16:25:37,389 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 904 transitions. [2020-10-11 16:25:37,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 904 transitions. [2020-10-11 16:25:37,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:37,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 904 transitions. [2020-10-11 16:25:37,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 16:25:37,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 16:25:37,391 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 16:25:37,391 INFO L185 Difference]: Start difference. First operand has 340 places, 534 transitions, 13080 flow. Second operand 19 states and 904 transitions. [2020-10-11 16:25:37,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 580 transitions, 15365 flow [2020-10-11 16:25:37,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 580 transitions, 14735 flow, removed 216 selfloop flow, removed 35 redundant places. [2020-10-11 16:25:37,619 INFO L241 Difference]: Finished difference. Result has 322 places, 544 transitions, 13114 flow [2020-10-11 16:25:37,620 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=12511, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13114, PETRI_PLACES=322, PETRI_TRANSITIONS=544} [2020-10-11 16:25:37,620 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 265 predicate places. [2020-10-11 16:25:37,620 INFO L481 AbstractCegarLoop]: Abstraction has has 322 places, 544 transitions, 13114 flow [2020-10-11 16:25:37,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 16:25:37,620 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:37,621 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:37,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-11 16:25:37,821 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:37,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:37,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1848275249, now seen corresponding path program 8 times [2020-10-11 16:25:37,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:37,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827018983] [2020-10-11 16:25:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:37,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827018983] [2020-10-11 16:25:37,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805829911] [2020-10-11 16:25:37,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:38,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:25:38,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:38,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:25:38,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:38,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:38,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:38,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-10-11 16:25:38,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061864858] [2020-10-11 16:25:38,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 16:25:38,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:38,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 16:25:38,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-11 16:25:38,674 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:38,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 544 transitions, 13114 flow. Second operand 17 states. [2020-10-11 16:25:38,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:38,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:38,675 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:39,644 INFO L129 PetriNetUnfolder]: 363/2615 cut-off events. [2020-10-11 16:25:39,644 INFO L130 PetriNetUnfolder]: For 32020/32260 co-relation queries the response was YES. [2020-10-11 16:25:39,667 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11786 conditions, 2615 events. 363/2615 cut-off events. For 32020/32260 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 27632 event pairs, 0 based on Foata normal form. 12/2349 useless extension candidates. Maximal degree in co-relation 11655. Up to 567 conditions per place. [2020-10-11 16:25:39,677 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 444 selfloop transitions, 97 changer transitions 5/582 dead transitions. [2020-10-11 16:25:39,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 582 transitions, 15171 flow [2020-10-11 16:25:39,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 16:25:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 16:25:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 904 transitions. [2020-10-11 16:25:39,679 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8347183748845799 [2020-10-11 16:25:39,679 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 904 transitions. [2020-10-11 16:25:39,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 904 transitions. [2020-10-11 16:25:39,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:39,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 904 transitions. [2020-10-11 16:25:39,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 16:25:39,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 16:25:39,681 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 16:25:39,681 INFO L185 Difference]: Start difference. First operand has 322 places, 544 transitions, 13114 flow. Second operand 19 states and 904 transitions. [2020-10-11 16:25:39,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 582 transitions, 15171 flow [2020-10-11 16:25:39,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 582 transitions, 15045 flow, removed 11 selfloop flow, removed 14 redundant places. [2020-10-11 16:25:39,907 INFO L241 Difference]: Finished difference. Result has 329 places, 549 transitions, 13427 flow [2020-10-11 16:25:39,908 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=12998, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13427, PETRI_PLACES=329, PETRI_TRANSITIONS=549} [2020-10-11 16:25:39,908 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 272 predicate places. [2020-10-11 16:25:39,908 INFO L481 AbstractCegarLoop]: Abstraction has has 329 places, 549 transitions, 13427 flow [2020-10-11 16:25:39,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 16:25:39,908 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:39,908 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:40,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-11 16:25:40,118 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:40,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1569142519, now seen corresponding path program 9 times [2020-10-11 16:25:40,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:40,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034780028] [2020-10-11 16:25:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:40,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034780028] [2020-10-11 16:25:40,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903653506] [2020-10-11 16:25:40,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:40,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 16:25:40,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:40,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:25:40,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:40,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:40,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:40,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-10-11 16:25:40,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762468248] [2020-10-11 16:25:40,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 16:25:40,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:40,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 16:25:40,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-11 16:25:40,966 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:40,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 549 transitions, 13427 flow. Second operand 17 states. [2020-10-11 16:25:40,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:40,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:40,968 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:41,925 INFO L129 PetriNetUnfolder]: 367/2644 cut-off events. [2020-10-11 16:25:41,925 INFO L130 PetriNetUnfolder]: For 34051/34301 co-relation queries the response was YES. [2020-10-11 16:25:41,949 INFO L80 FinitePrefix]: Finished finitePrefix Result has 12024 conditions, 2644 events. 367/2644 cut-off events. For 34051/34301 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 28076 event pairs, 0 based on Foata normal form. 12/2375 useless extension candidates. Maximal degree in co-relation 11889. Up to 522 conditions per place. [2020-10-11 16:25:41,958 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 399 selfloop transitions, 151 changer transitions 5/591 dead transitions. [2020-10-11 16:25:41,958 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 591 transitions, 15608 flow [2020-10-11 16:25:41,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 16:25:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-11 16:25:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 999 transitions. [2020-10-11 16:25:41,960 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8345864661654135 [2020-10-11 16:25:41,960 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 999 transitions. [2020-10-11 16:25:41,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 999 transitions. [2020-10-11 16:25:41,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:41,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 999 transitions. [2020-10-11 16:25:41,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-11 16:25:41,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-11 16:25:41,962 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-11 16:25:41,962 INFO L185 Difference]: Start difference. First operand has 329 places, 549 transitions, 13427 flow. Second operand 21 states and 999 transitions. [2020-10-11 16:25:41,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 591 transitions, 15608 flow [2020-10-11 16:25:42,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 591 transitions, 15472 flow, removed 9 selfloop flow, removed 14 redundant places. [2020-10-11 16:25:42,206 INFO L241 Difference]: Finished difference. Result has 338 places, 556 transitions, 13958 flow [2020-10-11 16:25:42,207 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=13301, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13958, PETRI_PLACES=338, PETRI_TRANSITIONS=556} [2020-10-11 16:25:42,208 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 281 predicate places. [2020-10-11 16:25:42,208 INFO L481 AbstractCegarLoop]: Abstraction has has 338 places, 556 transitions, 13958 flow [2020-10-11 16:25:42,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 16:25:42,208 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:42,208 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:42,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:42,424 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:42,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:42,424 INFO L82 PathProgramCache]: Analyzing trace with hash -100955341, now seen corresponding path program 10 times [2020-10-11 16:25:42,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:42,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250809806] [2020-10-11 16:25:42,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:42,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250809806] [2020-10-11 16:25:42,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533908810] [2020-10-11 16:25:42,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:42,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:25:42,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:42,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:25:42,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:42,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:42,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:42,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-10-11 16:25:42,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50640710] [2020-10-11 16:25:42,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 16:25:42,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:42,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 16:25:42,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-11 16:25:43,205 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:43,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 556 transitions, 13958 flow. Second operand 17 states. [2020-10-11 16:25:43,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:43,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:43,206 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:44,080 INFO L129 PetriNetUnfolder]: 368/2646 cut-off events. [2020-10-11 16:25:44,080 INFO L130 PetriNetUnfolder]: For 36683/36936 co-relation queries the response was YES. [2020-10-11 16:25:44,105 INFO L80 FinitePrefix]: Finished finitePrefix Result has 12253 conditions, 2646 events. 368/2646 cut-off events. For 36683/36936 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 28084 event pairs, 0 based on Foata normal form. 12/2376 useless extension candidates. Maximal degree in co-relation 12115. Up to 535 conditions per place. [2020-10-11 16:25:44,114 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 410 selfloop transitions, 140 changer transitions 5/591 dead transitions. [2020-10-11 16:25:44,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 591 transitions, 15973 flow [2020-10-11 16:25:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 16:25:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-11 16:25:44,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1046 transitions. [2020-10-11 16:25:44,116 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8341307814992025 [2020-10-11 16:25:44,116 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1046 transitions. [2020-10-11 16:25:44,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1046 transitions. [2020-10-11 16:25:44,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:44,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1046 transitions. [2020-10-11 16:25:44,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-11 16:25:44,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-11 16:25:44,120 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-11 16:25:44,120 INFO L185 Difference]: Start difference. First operand has 338 places, 556 transitions, 13958 flow. Second operand 22 states and 1046 transitions. [2020-10-11 16:25:44,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 591 transitions, 15973 flow [2020-10-11 16:25:44,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 591 transitions, 15785 flow, removed 11 selfloop flow, removed 16 redundant places. [2020-10-11 16:25:44,978 INFO L241 Difference]: Finished difference. Result has 345 places, 558 transitions, 14237 flow [2020-10-11 16:25:44,978 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=13780, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=14237, PETRI_PLACES=345, PETRI_TRANSITIONS=558} [2020-10-11 16:25:44,979 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 288 predicate places. [2020-10-11 16:25:44,979 INFO L481 AbstractCegarLoop]: Abstraction has has 345 places, 558 transitions, 14237 flow [2020-10-11 16:25:44,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 16:25:44,979 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:44,979 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:45,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:45,180 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:45,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1556770767, now seen corresponding path program 11 times [2020-10-11 16:25:45,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:45,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542722426] [2020-10-11 16:25:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:45,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542722426] [2020-10-11 16:25:45,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732913921] [2020-10-11 16:25:45,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:45,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 16:25:45,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:45,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 16:25:45,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:45,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:45,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:45,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:45,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-10-11 16:25:45,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732082465] [2020-10-11 16:25:45,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 16:25:45,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:45,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 16:25:45,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-11 16:25:46,205 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:46,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 558 transitions, 14237 flow. Second operand 18 states. [2020-10-11 16:25:46,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:46,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:46,206 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:48,213 INFO L129 PetriNetUnfolder]: 436/3106 cut-off events. [2020-10-11 16:25:48,213 INFO L130 PetriNetUnfolder]: For 54294/54673 co-relation queries the response was YES. [2020-10-11 16:25:48,238 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14875 conditions, 3106 events. 436/3106 cut-off events. For 54294/54673 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 34053 event pairs, 0 based on Foata normal form. 99/2876 useless extension candidates. Maximal degree in co-relation 14735. Up to 532 conditions per place. [2020-10-11 16:25:48,249 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 55 selfloop transitions, 561 changer transitions 25/677 dead transitions. [2020-10-11 16:25:48,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 677 transitions, 19583 flow [2020-10-11 16:25:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-11 16:25:48,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 16:25:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2579 transitions. [2020-10-11 16:25:48,252 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8378817413905133 [2020-10-11 16:25:48,252 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2579 transitions. [2020-10-11 16:25:48,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2579 transitions. [2020-10-11 16:25:48,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:48,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2579 transitions. [2020-10-11 16:25:48,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 55 states. [2020-10-11 16:25:48,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 55 states. [2020-10-11 16:25:48,259 INFO L81 ComplementDD]: Finished complementDD. Result 55 states. [2020-10-11 16:25:48,259 INFO L185 Difference]: Start difference. First operand has 345 places, 558 transitions, 14237 flow. Second operand 54 states and 2579 transitions. [2020-10-11 16:25:48,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 677 transitions, 19583 flow [2020-10-11 16:25:48,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 677 transitions, 19356 flow, removed 22 selfloop flow, removed 18 redundant places. [2020-10-11 16:25:48,673 INFO L241 Difference]: Finished difference. Result has 396 places, 645 transitions, 18161 flow [2020-10-11 16:25:48,674 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=14067, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=18161, PETRI_PLACES=396, PETRI_TRANSITIONS=645} [2020-10-11 16:25:48,674 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 339 predicate places. [2020-10-11 16:25:48,675 INFO L481 AbstractCegarLoop]: Abstraction has has 396 places, 645 transitions, 18161 flow [2020-10-11 16:25:48,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 16:25:48,675 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:48,675 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:48,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:48,891 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:48,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:48,891 INFO L82 PathProgramCache]: Analyzing trace with hash -262986392, now seen corresponding path program 14 times [2020-10-11 16:25:48,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:48,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726492775] [2020-10-11 16:25:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:49,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726492775] [2020-10-11 16:25:49,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494183272] [2020-10-11 16:25:49,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:49,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:25:49,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:49,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:25:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:49,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:49,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:49,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:25:49,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133634699] [2020-10-11 16:25:49,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:25:49,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:49,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:25:49,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:25:50,103 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:50,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 645 transitions, 18161 flow. Second operand 20 states. [2020-10-11 16:25:50,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:50,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:50,105 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:51,151 INFO L129 PetriNetUnfolder]: 426/3092 cut-off events. [2020-10-11 16:25:51,151 INFO L130 PetriNetUnfolder]: For 50085/50385 co-relation queries the response was YES. [2020-10-11 16:25:51,179 INFO L80 FinitePrefix]: Finished finitePrefix Result has 15355 conditions, 3092 events. 426/3092 cut-off events. For 50085/50385 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 33972 event pairs, 0 based on Foata normal form. 11/2774 useless extension candidates. Maximal degree in co-relation 15199. Up to 676 conditions per place. [2020-10-11 16:25:51,191 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 538 selfloop transitions, 107 changer transitions 5/686 dead transitions. [2020-10-11 16:25:51,191 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 686 transitions, 20650 flow [2020-10-11 16:25:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 16:25:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-11 16:25:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 998 transitions. [2020-10-11 16:25:51,193 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.83375104427736 [2020-10-11 16:25:51,193 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 998 transitions. [2020-10-11 16:25:51,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 998 transitions. [2020-10-11 16:25:51,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:51,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 998 transitions. [2020-10-11 16:25:51,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-11 16:25:51,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-11 16:25:51,195 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-11 16:25:51,195 INFO L185 Difference]: Start difference. First operand has 396 places, 645 transitions, 18161 flow. Second operand 21 states and 998 transitions. [2020-10-11 16:25:51,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 686 transitions, 20650 flow [2020-10-11 16:25:51,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 686 transitions, 18850 flow, removed 787 selfloop flow, removed 32 redundant places. [2020-10-11 16:25:51,633 INFO L241 Difference]: Finished difference. Result has 378 places, 648 transitions, 16861 flow [2020-10-11 16:25:51,634 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=16445, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=16861, PETRI_PLACES=378, PETRI_TRANSITIONS=648} [2020-10-11 16:25:51,634 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 321 predicate places. [2020-10-11 16:25:51,634 INFO L481 AbstractCegarLoop]: Abstraction has has 378 places, 648 transitions, 16861 flow [2020-10-11 16:25:51,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:25:51,634 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:51,634 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:51,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-11 16:25:51,835 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:51,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:51,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1137614190, now seen corresponding path program 15 times [2020-10-11 16:25:51,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:51,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038431223] [2020-10-11 16:25:51,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:51,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038431223] [2020-10-11 16:25:51,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594964397] [2020-10-11 16:25:51,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:52,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 16:25:52,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:52,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:25:52,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:52,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:52,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:52,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:25:52,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723735896] [2020-10-11 16:25:52,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:25:52,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:52,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:25:52,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:25:53,319 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:53,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 648 transitions, 16861 flow. Second operand 20 states. [2020-10-11 16:25:53,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:53,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:53,320 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:54,509 INFO L129 PetriNetUnfolder]: 429/3112 cut-off events. [2020-10-11 16:25:54,509 INFO L130 PetriNetUnfolder]: For 45753/45989 co-relation queries the response was YES. [2020-10-11 16:25:54,535 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14592 conditions, 3112 events. 429/3112 cut-off events. For 45753/45989 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 34271 event pairs, 0 based on Foata normal form. 11/2791 useless extension candidates. Maximal degree in co-relation 14440. Up to 644 conditions per place. [2020-10-11 16:25:54,546 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 503 selfloop transitions, 146 changer transitions 5/690 dead transitions. [2020-10-11 16:25:54,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 690 transitions, 19302 flow [2020-10-11 16:25:54,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 16:25:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-11 16:25:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1234 transitions. [2020-10-11 16:25:54,548 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8326585695006747 [2020-10-11 16:25:54,548 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1234 transitions. [2020-10-11 16:25:54,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1234 transitions. [2020-10-11 16:25:54,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:54,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1234 transitions. [2020-10-11 16:25:54,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-11 16:25:54,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-11 16:25:54,551 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-11 16:25:54,551 INFO L185 Difference]: Start difference. First operand has 378 places, 648 transitions, 16861 flow. Second operand 26 states and 1234 transitions. [2020-10-11 16:25:54,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 690 transitions, 19302 flow [2020-10-11 16:25:54,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 690 transitions, 19095 flow, removed 33 selfloop flow, removed 17 redundant places. [2020-10-11 16:25:54,908 INFO L241 Difference]: Finished difference. Result has 388 places, 652 transitions, 17214 flow [2020-10-11 16:25:54,908 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=16676, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=17214, PETRI_PLACES=388, PETRI_TRANSITIONS=652} [2020-10-11 16:25:54,908 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 331 predicate places. [2020-10-11 16:25:54,908 INFO L481 AbstractCegarLoop]: Abstraction has has 388 places, 652 transitions, 17214 flow [2020-10-11 16:25:54,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:25:54,909 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:54,909 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:55,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:55,116 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:55,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:55,116 INFO L82 PathProgramCache]: Analyzing trace with hash -24417088, now seen corresponding path program 16 times [2020-10-11 16:25:55,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:55,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31215257] [2020-10-11 16:25:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:25:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:55,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31215257] [2020-10-11 16:25:55,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677651160] [2020-10-11 16:25:55,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:25:55,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:25:55,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:25:55,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 16:25:55,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:25:55,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:55,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:25:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:25:55,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:25:55,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:25:55,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530633536] [2020-10-11 16:25:55,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:25:55,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:25:55,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:25:55,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:25:56,527 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:25:56,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 652 transitions, 17214 flow. Second operand 20 states. [2020-10-11 16:25:56,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:25:56,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:25:56,528 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:25:59,163 INFO L129 PetriNetUnfolder]: 500/3600 cut-off events. [2020-10-11 16:25:59,163 INFO L130 PetriNetUnfolder]: For 68743/69065 co-relation queries the response was YES. [2020-10-11 16:25:59,199 INFO L80 FinitePrefix]: Finished finitePrefix Result has 17494 conditions, 3600 events. 500/3600 cut-off events. For 68743/69065 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 40284 event pairs, 0 based on Foata normal form. 90/3307 useless extension candidates. Maximal degree in co-relation 17340. Up to 521 conditions per place. [2020-10-11 16:25:59,212 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 74 selfloop transitions, 642 changer transitions 17/769 dead transitions. [2020-10-11 16:25:59,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 769 transitions, 22754 flow [2020-10-11 16:25:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-11 16:25:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 16:25:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 2671 transitions. [2020-10-11 16:25:59,215 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8367794486215538 [2020-10-11 16:25:59,215 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 2671 transitions. [2020-10-11 16:25:59,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 2671 transitions. [2020-10-11 16:25:59,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:25:59,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 2671 transitions. [2020-10-11 16:25:59,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 57 states. [2020-10-11 16:25:59,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 57 states. [2020-10-11 16:25:59,222 INFO L81 ComplementDD]: Finished complementDD. Result 57 states. [2020-10-11 16:25:59,222 INFO L185 Difference]: Start difference. First operand has 388 places, 652 transitions, 17214 flow. Second operand 56 states and 2671 transitions. [2020-10-11 16:25:59,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 769 transitions, 22754 flow [2020-10-11 16:25:59,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 769 transitions, 22487 flow, removed 26 selfloop flow, removed 23 redundant places. [2020-10-11 16:25:59,769 INFO L241 Difference]: Finished difference. Result has 431 places, 744 transitions, 21547 flow [2020-10-11 16:25:59,770 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=16991, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=560, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=21547, PETRI_PLACES=431, PETRI_TRANSITIONS=744} [2020-10-11 16:25:59,770 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 374 predicate places. [2020-10-11 16:25:59,770 INFO L481 AbstractCegarLoop]: Abstraction has has 431 places, 744 transitions, 21547 flow [2020-10-11 16:25:59,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:25:59,771 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:25:59,771 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:25:59,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-11 16:25:59,972 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:25:59,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:25:59,972 INFO L82 PathProgramCache]: Analyzing trace with hash 298310368, now seen corresponding path program 17 times [2020-10-11 16:25:59,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:25:59,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982696345] [2020-10-11 16:25:59,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:25:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:26:00,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982696345] [2020-10-11 16:26:00,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097603031] [2020-10-11 16:26:00,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:00,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 16:26:00,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:26:00,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:26:00,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:26:00,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:26:00,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:26:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:26:00,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:26:00,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:26:00,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013250011] [2020-10-11 16:26:00,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:26:00,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:26:00,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:26:00,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:26:01,405 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:26:01,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 744 transitions, 21547 flow. Second operand 20 states. [2020-10-11 16:26:01,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:26:01,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:26:01,406 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:26:04,197 INFO L129 PetriNetUnfolder]: 544/3942 cut-off events. [2020-10-11 16:26:04,197 INFO L130 PetriNetUnfolder]: For 77041/77473 co-relation queries the response was YES. [2020-10-11 16:26:04,246 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20006 conditions, 3942 events. 544/3942 cut-off events. For 77041/77473 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 44912 event pairs, 0 based on Foata normal form. 84/3606 useless extension candidates. Maximal degree in co-relation 19841. Up to 593 conditions per place. [2020-10-11 16:26:04,262 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 111 selfloop transitions, 686 changer transitions 17/850 dead transitions. [2020-10-11 16:26:04,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 850 transitions, 26972 flow [2020-10-11 16:26:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-11 16:26:04,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 16:26:04,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 2765 transitions. [2020-10-11 16:26:04,265 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8363581367211131 [2020-10-11 16:26:04,265 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 2765 transitions. [2020-10-11 16:26:04,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 2765 transitions. [2020-10-11 16:26:04,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:26:04,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 2765 transitions. [2020-10-11 16:26:04,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 59 states. [2020-10-11 16:26:04,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 59 states. [2020-10-11 16:26:04,271 INFO L81 ComplementDD]: Finished complementDD. Result 59 states. [2020-10-11 16:26:04,271 INFO L185 Difference]: Start difference. First operand has 431 places, 744 transitions, 21547 flow. Second operand 58 states and 2765 transitions. [2020-10-11 16:26:04,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 850 transitions, 26972 flow [2020-10-11 16:26:04,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 850 transitions, 26053 flow, removed 296 selfloop flow, removed 41 redundant places. [2020-10-11 16:26:04,945 INFO L241 Difference]: Finished difference. Result has 454 places, 823 transitions, 25030 flow [2020-10-11 16:26:04,946 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=20759, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=25030, PETRI_PLACES=454, PETRI_TRANSITIONS=823} [2020-10-11 16:26:04,946 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 397 predicate places. [2020-10-11 16:26:04,946 INFO L481 AbstractCegarLoop]: Abstraction has has 454 places, 823 transitions, 25030 flow [2020-10-11 16:26:04,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:26:04,946 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:26:04,946 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:26:05,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:05,147 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:26:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:26:05,148 INFO L82 PathProgramCache]: Analyzing trace with hash 434764608, now seen corresponding path program 18 times [2020-10-11 16:26:05,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:26:05,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020008829] [2020-10-11 16:26:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:26:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:26:05,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020008829] [2020-10-11 16:26:05,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186749209] [2020-10-11 16:26:05,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:05,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 16:26:05,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:26:05,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 16:26:05,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:26:05,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:26:05,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:26:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:26:05,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:26:05,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:26:05,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920032438] [2020-10-11 16:26:05,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:26:05,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:26:05,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:26:05,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:26:06,587 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:26:06,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 823 transitions, 25030 flow. Second operand 20 states. [2020-10-11 16:26:06,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:26:06,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:26:06,588 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:26:09,071 INFO L129 PetriNetUnfolder]: 584/4240 cut-off events. [2020-10-11 16:26:09,071 INFO L130 PetriNetUnfolder]: For 88263/88739 co-relation queries the response was YES. [2020-10-11 16:26:09,125 INFO L80 FinitePrefix]: Finished finitePrefix Result has 22373 conditions, 4240 events. 584/4240 cut-off events. For 88263/88739 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 49243 event pairs, 0 based on Foata normal form. 70/3858 useless extension candidates. Maximal degree in co-relation 22203. Up to 661 conditions per place. [2020-10-11 16:26:09,144 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 272 selfloop transitions, 594 changer transitions 17/919 dead transitions. [2020-10-11 16:26:09,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 919 transitions, 30603 flow [2020-10-11 16:26:09,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-11 16:26:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-11 16:26:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2243 transitions. [2020-10-11 16:26:09,147 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8372527062336693 [2020-10-11 16:26:09,147 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2243 transitions. [2020-10-11 16:26:09,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2243 transitions. [2020-10-11 16:26:09,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:26:09,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2243 transitions. [2020-10-11 16:26:09,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-11 16:26:09,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-11 16:26:09,152 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-11 16:26:09,152 INFO L185 Difference]: Start difference. First operand has 454 places, 823 transitions, 25030 flow. Second operand 47 states and 2243 transitions. [2020-10-11 16:26:09,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 919 transitions, 30603 flow [2020-10-11 16:26:09,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 919 transitions, 29314 flow, removed 426 selfloop flow, removed 41 redundant places. [2020-10-11 16:26:09,965 INFO L241 Difference]: Finished difference. Result has 467 places, 880 transitions, 27668 flow [2020-10-11 16:26:09,966 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=23907, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=27668, PETRI_PLACES=467, PETRI_TRANSITIONS=880} [2020-10-11 16:26:09,967 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 410 predicate places. [2020-10-11 16:26:09,967 INFO L481 AbstractCegarLoop]: Abstraction has has 467 places, 880 transitions, 27668 flow [2020-10-11 16:26:09,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:26:09,967 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:26:09,967 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:26:10,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-11 16:26:10,168 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:26:10,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:26:10,168 INFO L82 PathProgramCache]: Analyzing trace with hash -184969408, now seen corresponding path program 19 times [2020-10-11 16:26:10,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:26:10,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643092932] [2020-10-11 16:26:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:26:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:26:10,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643092932] [2020-10-11 16:26:10,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088702417] [2020-10-11 16:26:10,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:10,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:26:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:26:10,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:26:10,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:26:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:26:10,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:26:10,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:26:10,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235381300] [2020-10-11 16:26:10,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:26:10,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:26:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:26:10,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:26:11,439 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:26:11,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 880 transitions, 27668 flow. Second operand 20 states. [2020-10-11 16:26:11,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:26:11,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:26:11,441 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:26:13,925 INFO L129 PetriNetUnfolder]: 607/4417 cut-off events. [2020-10-11 16:26:13,925 INFO L130 PetriNetUnfolder]: For 95467/95949 co-relation queries the response was YES. [2020-10-11 16:26:13,986 INFO L80 FinitePrefix]: Finished finitePrefix Result has 23975 conditions, 4417 events. 607/4417 cut-off events. For 95467/95949 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 51581 event pairs, 0 based on Foata normal form. 80/4026 useless extension candidates. Maximal degree in co-relation 23798. Up to 659 conditions per place. [2020-10-11 16:26:14,006 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 276 selfloop transitions, 624 changer transitions 17/953 dead transitions. [2020-10-11 16:26:14,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 953 transitions, 32708 flow [2020-10-11 16:26:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-11 16:26:14,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 16:26:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2482 transitions. [2020-10-11 16:26:14,008 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8373819163292847 [2020-10-11 16:26:14,008 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2482 transitions. [2020-10-11 16:26:14,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2482 transitions. [2020-10-11 16:26:14,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:26:14,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2482 transitions. [2020-10-11 16:26:14,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 53 states. [2020-10-11 16:26:14,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 53 states. [2020-10-11 16:26:14,013 INFO L81 ComplementDD]: Finished complementDD. Result 53 states. [2020-10-11 16:26:14,013 INFO L185 Difference]: Start difference. First operand has 467 places, 880 transitions, 27668 flow. Second operand 52 states and 2482 transitions. [2020-10-11 16:26:14,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 953 transitions, 32708 flow [2020-10-11 16:26:14,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 953 transitions, 32158 flow, removed 181 selfloop flow, removed 33 redundant places. [2020-10-11 16:26:14,960 INFO L241 Difference]: Finished difference. Result has 490 places, 916 transitions, 30298 flow [2020-10-11 16:26:14,961 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=27142, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=30298, PETRI_PLACES=490, PETRI_TRANSITIONS=916} [2020-10-11 16:26:14,961 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 433 predicate places. [2020-10-11 16:26:14,962 INFO L481 AbstractCegarLoop]: Abstraction has has 490 places, 916 transitions, 30298 flow [2020-10-11 16:26:14,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:26:14,962 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:26:14,962 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:26:15,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:15,168 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:26:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:26:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash -973419032, now seen corresponding path program 12 times [2020-10-11 16:26:15,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:26:15,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871247002] [2020-10-11 16:26:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:26:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:26:15,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871247002] [2020-10-11 16:26:15,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750138756] [2020-10-11 16:26:15,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:15,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 16:26:15,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:26:15,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:26:15,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:26:15,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:26:15,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:26:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:26:15,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:26:15,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-10-11 16:26:15,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969979912] [2020-10-11 16:26:15,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 16:26:15,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:26:15,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 16:26:15,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-11 16:26:16,572 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:26:16,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 916 transitions, 30298 flow. Second operand 19 states. [2020-10-11 16:26:16,573 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:26:16,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:26:16,574 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:26:19,310 INFO L129 PetriNetUnfolder]: 671/4870 cut-off events. [2020-10-11 16:26:19,311 INFO L130 PetriNetUnfolder]: For 103168/103747 co-relation queries the response was YES. [2020-10-11 16:26:19,381 INFO L80 FinitePrefix]: Finished finitePrefix Result has 26878 conditions, 4870 events. 671/4870 cut-off events. For 103168/103747 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 58128 event pairs, 0 based on Foata normal form. 116/4467 useless extension candidates. Maximal degree in co-relation 26695. Up to 747 conditions per place. [2020-10-11 16:26:19,405 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 183 selfloop transitions, 812 changer transitions 11/1042 dead transitions. [2020-10-11 16:26:19,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 1042 transitions, 36583 flow [2020-10-11 16:26:19,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-11 16:26:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 16:26:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2385 transitions. [2020-10-11 16:26:19,408 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8368421052631579 [2020-10-11 16:26:19,408 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2385 transitions. [2020-10-11 16:26:19,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2385 transitions. [2020-10-11 16:26:19,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:26:19,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2385 transitions. [2020-10-11 16:26:19,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 51 states. [2020-10-11 16:26:19,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 51 states. [2020-10-11 16:26:19,414 INFO L81 ComplementDD]: Finished complementDD. Result 51 states. [2020-10-11 16:26:19,414 INFO L185 Difference]: Start difference. First operand has 490 places, 916 transitions, 30298 flow. Second operand 50 states and 2385 transitions. [2020-10-11 16:26:19,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 1042 transitions, 36583 flow [2020-10-11 16:26:20,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1042 transitions, 35822 flow, removed 191 selfloop flow, removed 45 redundant places. [2020-10-11 16:26:20,704 INFO L241 Difference]: Finished difference. Result has 496 places, 1024 transitions, 34940 flow [2020-10-11 16:26:20,705 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=29577, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=916, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=720, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=34940, PETRI_PLACES=496, PETRI_TRANSITIONS=1024} [2020-10-11 16:26:20,706 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 439 predicate places. [2020-10-11 16:26:20,706 INFO L481 AbstractCegarLoop]: Abstraction has has 496 places, 1024 transitions, 34940 flow [2020-10-11 16:26:20,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 16:26:20,706 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:26:20,706 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:26:20,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-11 16:26:20,907 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:26:20,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:26:20,907 INFO L82 PathProgramCache]: Analyzing trace with hash -701124888, now seen corresponding path program 13 times [2020-10-11 16:26:20,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:26:20,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607862065] [2020-10-11 16:26:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:26:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:26:21,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607862065] [2020-10-11 16:26:21,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483358839] [2020-10-11 16:26:21,120 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:21,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:26:21,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:26:21,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:26:21,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:26:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:26:21,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:26:21,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-10-11 16:26:21,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617799750] [2020-10-11 16:26:21,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 16:26:21,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:26:21,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 16:26:21,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-11 16:26:22,319 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:26:22,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 1024 transitions, 34940 flow. Second operand 19 states. [2020-10-11 16:26:22,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:26:22,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:26:22,321 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:26:25,421 INFO L129 PetriNetUnfolder]: 721/5281 cut-off events. [2020-10-11 16:26:25,421 INFO L130 PetriNetUnfolder]: For 117938/118561 co-relation queries the response was YES. [2020-10-11 16:26:25,475 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30261 conditions, 5281 events. 721/5281 cut-off events. For 117938/118561 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 63358 event pairs, 0 based on Foata normal form. 92/4809 useless extension candidates. Maximal degree in co-relation 30076. Up to 942 conditions per place. [2020-10-11 16:26:25,498 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 530 selfloop transitions, 536 changer transitions 11/1113 dead transitions. [2020-10-11 16:26:25,499 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 1113 transitions, 41106 flow [2020-10-11 16:26:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 16:26:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-11 16:26:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2290 transitions. [2020-10-11 16:26:25,501 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8369883040935673 [2020-10-11 16:26:25,501 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2290 transitions. [2020-10-11 16:26:25,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2290 transitions. [2020-10-11 16:26:25,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:26:25,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2290 transitions. [2020-10-11 16:26:25,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 49 states. [2020-10-11 16:26:25,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 49 states. [2020-10-11 16:26:25,506 INFO L81 ComplementDD]: Finished complementDD. Result 49 states. [2020-10-11 16:26:25,506 INFO L185 Difference]: Start difference. First operand has 496 places, 1024 transitions, 34940 flow. Second operand 48 states and 2290 transitions. [2020-10-11 16:26:25,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 1113 transitions, 41106 flow [2020-10-11 16:26:26,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 1113 transitions, 40042 flow, removed 373 selfloop flow, removed 35 redundant places. [2020-10-11 16:26:26,580 INFO L241 Difference]: Finished difference. Result has 513 places, 1095 transitions, 38115 flow [2020-10-11 16:26:26,581 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=33958, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=474, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=38115, PETRI_PLACES=513, PETRI_TRANSITIONS=1095} [2020-10-11 16:26:26,581 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 456 predicate places. [2020-10-11 16:26:26,581 INFO L481 AbstractCegarLoop]: Abstraction has has 513 places, 1095 transitions, 38115 flow [2020-10-11 16:26:26,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 16:26:26,582 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:26:26,582 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:26:26,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 16:26:26,783 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:26:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:26:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1611053688, now seen corresponding path program 14 times [2020-10-11 16:26:26,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:26:26,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674619812] [2020-10-11 16:26:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:26:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:26:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:26:26,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674619812] [2020-10-11 16:26:26,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344592106] [2020-10-11 16:26:26,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:26:27,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:26:27,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:26:27,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:26:27,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:26:31,669 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-11 16:26:31,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:26:31,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:26:31,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:26:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:26:31,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:26:31,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:26:31,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529476523] [2020-10-11 16:26:31,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:26:31,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:26:31,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:26:31,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=307, Unknown=1, NotChecked=0, Total=380 [2020-10-11 16:26:44,219 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:26:44,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1095 transitions, 38115 flow. Second operand 20 states. [2020-10-11 16:26:44,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:26:44,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:26:44,220 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:26:48,589 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-10-11 16:26:52,768 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2020-10-11 16:26:54,844 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-11 16:26:59,087 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-11 16:27:02,377 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-10-11 16:27:03,496 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-11 16:27:06,086 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-11 16:27:06,399 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-11 16:27:12,802 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-10-11 16:27:16,066 INFO L129 PetriNetUnfolder]: 781/5701 cut-off events. [2020-10-11 16:27:16,066 INFO L130 PetriNetUnfolder]: For 138112/138920 co-relation queries the response was YES. [2020-10-11 16:27:16,147 INFO L80 FinitePrefix]: Finished finitePrefix Result has 33300 conditions, 5701 events. 781/5701 cut-off events. For 138112/138920 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 69574 event pairs, 0 based on Foata normal form. 156/5249 useless extension candidates. Maximal degree in co-relation 33110. Up to 858 conditions per place. [2020-10-11 16:27:16,174 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 244 selfloop transitions, 920 changer transitions 17/1217 dead transitions. [2020-10-11 16:27:16,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1217 transitions, 45609 flow [2020-10-11 16:27:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-11 16:27:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 16:27:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2528 transitions. [2020-10-11 16:27:16,177 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8368090036411784 [2020-10-11 16:27:16,177 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2528 transitions. [2020-10-11 16:27:16,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2528 transitions. [2020-10-11 16:27:16,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:27:16,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2528 transitions. [2020-10-11 16:27:16,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 54 states. [2020-10-11 16:27:16,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 54 states. [2020-10-11 16:27:16,181 INFO L81 ComplementDD]: Finished complementDD. Result 54 states. [2020-10-11 16:27:16,181 INFO L185 Difference]: Start difference. First operand has 513 places, 1095 transitions, 38115 flow. Second operand 53 states and 2528 transitions. [2020-10-11 16:27:16,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1217 transitions, 45609 flow [2020-10-11 16:27:17,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 1217 transitions, 44748 flow, removed 272 selfloop flow, removed 33 redundant places. [2020-10-11 16:27:17,563 INFO L241 Difference]: Finished difference. Result has 540 places, 1179 transitions, 43063 flow [2020-10-11 16:27:17,564 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=37280, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=841, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=43063, PETRI_PLACES=540, PETRI_TRANSITIONS=1179} [2020-10-11 16:27:17,564 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 483 predicate places. [2020-10-11 16:27:17,565 INFO L481 AbstractCegarLoop]: Abstraction has has 540 places, 1179 transitions, 43063 flow [2020-10-11 16:27:17,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:27:17,565 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:27:17,565 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:27:17,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 16:27:17,766 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:27:17,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:27:17,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1460885068, now seen corresponding path program 15 times [2020-10-11 16:27:17,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:27:17,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321997974] [2020-10-11 16:27:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:27:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:27:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:27:18,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321997974] [2020-10-11 16:27:18,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299802752] [2020-10-11 16:27:18,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:27:18,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 16:27:18,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:27:18,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:27:18,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:27:18,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:27:18,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:27:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:27:18,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:27:18,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-10-11 16:27:18,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498684914] [2020-10-11 16:27:18,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 16:27:18,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:27:18,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 16:27:18,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-11 16:27:18,907 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:27:18,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 1179 transitions, 43063 flow. Second operand 19 states. [2020-10-11 16:27:18,908 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:27:18,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:27:18,908 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:27:22,243 INFO L129 PetriNetUnfolder]: 804/5871 cut-off events. [2020-10-11 16:27:22,244 INFO L130 PetriNetUnfolder]: For 146753/147532 co-relation queries the response was YES. [2020-10-11 16:27:22,366 INFO L80 FinitePrefix]: Finished finitePrefix Result has 35566 conditions, 5871 events. 804/5871 cut-off events. For 146753/147532 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 72125 event pairs, 0 based on Foata normal form. 127/5373 useless extension candidates. Maximal degree in co-relation 35368. Up to 1037 conditions per place. [2020-10-11 16:27:22,396 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 572 selfloop transitions, 635 changer transitions 11/1254 dead transitions. [2020-10-11 16:27:22,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 1254 transitions, 48897 flow [2020-10-11 16:27:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-11 16:27:22,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 16:27:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 2670 transitions. [2020-10-11 16:27:22,399 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8364661654135338 [2020-10-11 16:27:22,399 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 2670 transitions. [2020-10-11 16:27:22,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 2670 transitions. [2020-10-11 16:27:22,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:27:22,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 2670 transitions. [2020-10-11 16:27:22,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 57 states. [2020-10-11 16:27:22,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 57 states. [2020-10-11 16:27:22,402 INFO L81 ComplementDD]: Finished complementDD. Result 57 states. [2020-10-11 16:27:22,403 INFO L185 Difference]: Start difference. First operand has 540 places, 1179 transitions, 43063 flow. Second operand 56 states and 2670 transitions. [2020-10-11 16:27:22,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 1254 transitions, 48897 flow [2020-10-11 16:27:23,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1254 transitions, 47401 flow, removed 608 selfloop flow, removed 34 redundant places. [2020-10-11 16:27:23,979 INFO L241 Difference]: Finished difference. Result has 563 places, 1233 transitions, 45258 flow [2020-10-11 16:27:23,980 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=41587, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=587, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=45258, PETRI_PLACES=563, PETRI_TRANSITIONS=1233} [2020-10-11 16:27:23,980 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 506 predicate places. [2020-10-11 16:27:23,981 INFO L481 AbstractCegarLoop]: Abstraction has has 563 places, 1233 transitions, 45258 flow [2020-10-11 16:27:23,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 16:27:23,981 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:27:23,981 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:27:24,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-11 16:27:24,182 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:27:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:27:24,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1192737384, now seen corresponding path program 16 times [2020-10-11 16:27:24,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:27:24,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174095571] [2020-10-11 16:27:24,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:27:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:27:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:27:24,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174095571] [2020-10-11 16:27:24,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477786737] [2020-10-11 16:27:24,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:27:24,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:27:24,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:27:24,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:27:24,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:27:24,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:27:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:27:24,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:27:24,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:27:24,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44567318] [2020-10-11 16:27:24,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:27:24,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:27:24,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:27:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:27:25,556 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:27:25,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1233 transitions, 45258 flow. Second operand 20 states. [2020-10-11 16:27:25,557 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:27:25,557 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:27:25,557 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:27:28,043 INFO L129 PetriNetUnfolder]: 834/6134 cut-off events. [2020-10-11 16:27:28,044 INFO L130 PetriNetUnfolder]: For 151183/151996 co-relation queries the response was YES. [2020-10-11 16:27:28,147 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37162 conditions, 6134 events. 834/6134 cut-off events. For 151183/151996 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 76168 event pairs, 0 based on Foata normal form. 44/5524 useless extension candidates. Maximal degree in co-relation 36962. Up to 1341 conditions per place. [2020-10-11 16:27:28,179 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 1110 selfloop transitions, 201 changer transitions 13/1360 dead transitions. [2020-10-11 16:27:28,179 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1360 transitions, 52396 flow [2020-10-11 16:27:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 16:27:28,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-11 16:27:28,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1520 transitions. [2020-10-11 16:27:28,182 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2020-10-11 16:27:28,182 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1520 transitions. [2020-10-11 16:27:28,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1520 transitions. [2020-10-11 16:27:28,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:27:28,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1520 transitions. [2020-10-11 16:27:28,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-11 16:27:28,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-11 16:27:28,186 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-11 16:27:28,186 INFO L185 Difference]: Start difference. First operand has 563 places, 1233 transitions, 45258 flow. Second operand 32 states and 1520 transitions. [2020-10-11 16:27:28,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1360 transitions, 52396 flow [2020-10-11 16:27:29,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 1360 transitions, 51643 flow, removed 185 selfloop flow, removed 40 redundant places. [2020-10-11 16:27:29,882 INFO L241 Difference]: Finished difference. Result has 565 places, 1283 transitions, 46963 flow [2020-10-11 16:27:29,883 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=44551, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1037, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=46963, PETRI_PLACES=565, PETRI_TRANSITIONS=1283} [2020-10-11 16:27:29,883 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 508 predicate places. [2020-10-11 16:27:29,883 INFO L481 AbstractCegarLoop]: Abstraction has has 565 places, 1283 transitions, 46963 flow [2020-10-11 16:27:29,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:27:29,883 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:27:29,884 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:27:30,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:27:30,097 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:27:30,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:27:30,097 INFO L82 PathProgramCache]: Analyzing trace with hash -192864272, now seen corresponding path program 17 times [2020-10-11 16:27:30,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:27:30,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037828369] [2020-10-11 16:27:30,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:27:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:27:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:27:30,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037828369] [2020-10-11 16:27:30,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372498882] [2020-10-11 16:27:30,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:27:30,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 16:27:30,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:27:30,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:27:30,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:27:30,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:27:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:27:30,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:27:30,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:27:30,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365537074] [2020-10-11 16:27:30,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:27:30,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:27:30,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:27:30,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:27:31,555 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:27:31,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 1283 transitions, 46963 flow. Second operand 20 states. [2020-10-11 16:27:31,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:27:31,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:27:31,557 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:27:34,077 INFO L129 PetriNetUnfolder]: 838/6193 cut-off events. [2020-10-11 16:27:34,078 INFO L130 PetriNetUnfolder]: For 143548/144319 co-relation queries the response was YES. [2020-10-11 16:27:34,189 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37312 conditions, 6193 events. 838/6193 cut-off events. For 143548/144319 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 77408 event pairs, 0 based on Foata normal form. 41/5573 useless extension candidates. Maximal degree in co-relation 37102. Up to 1365 conditions per place. [2020-10-11 16:27:34,219 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 1123 selfloop transitions, 195 changer transitions 5/1359 dead transitions. [2020-10-11 16:27:34,220 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 1359 transitions, 52083 flow [2020-10-11 16:27:34,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 16:27:34,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-11 16:27:34,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1327 transitions. [2020-10-11 16:27:34,222 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.831453634085213 [2020-10-11 16:27:34,222 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1327 transitions. [2020-10-11 16:27:34,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1327 transitions. [2020-10-11 16:27:34,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:27:34,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1327 transitions. [2020-10-11 16:27:34,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-11 16:27:34,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-11 16:27:34,225 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-11 16:27:34,225 INFO L185 Difference]: Start difference. First operand has 565 places, 1283 transitions, 46963 flow. Second operand 28 states and 1327 transitions. [2020-10-11 16:27:34,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 1359 transitions, 52083 flow [2020-10-11 16:27:36,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 1359 transitions, 51874 flow, removed 47 selfloop flow, removed 20 redundant places. [2020-10-11 16:27:36,080 INFO L241 Difference]: Finished difference. Result has 572 places, 1298 transitions, 47910 flow [2020-10-11 16:27:36,081 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=46764, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1088, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=47910, PETRI_PLACES=572, PETRI_TRANSITIONS=1298} [2020-10-11 16:27:36,081 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 515 predicate places. [2020-10-11 16:27:36,081 INFO L481 AbstractCegarLoop]: Abstraction has has 572 places, 1298 transitions, 47910 flow [2020-10-11 16:27:36,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:27:36,082 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:27:36,082 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:27:36,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-10-11 16:27:36,283 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:27:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:27:36,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1432273984, now seen corresponding path program 18 times [2020-10-11 16:27:36,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:27:36,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283089701] [2020-10-11 16:27:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:27:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:27:36,424 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 3 [2020-10-11 16:27:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:27:36,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283089701] [2020-10-11 16:27:36,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916538320] [2020-10-11 16:27:36,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:27:36,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 16:27:36,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:27:36,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:27:36,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:27:37,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:27:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:27:37,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:27:37,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:27:37,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901689672] [2020-10-11 16:27:37,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:27:37,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:27:37,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:27:37,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:27:37,674 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:27:37,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 1298 transitions, 47910 flow. Second operand 20 states. [2020-10-11 16:27:37,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:27:37,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:27:37,675 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:27:40,290 INFO L129 PetriNetUnfolder]: 845/6263 cut-off events. [2020-10-11 16:27:40,290 INFO L130 PetriNetUnfolder]: For 149667/150428 co-relation queries the response was YES. [2020-10-11 16:27:40,396 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37959 conditions, 6263 events. 845/6263 cut-off events. For 149667/150428 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 78537 event pairs, 0 based on Foata normal form. 41/5635 useless extension candidates. Maximal degree in co-relation 37749. Up to 1368 conditions per place. [2020-10-11 16:27:40,427 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 1123 selfloop transitions, 206 changer transitions 5/1370 dead transitions. [2020-10-11 16:27:40,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 1370 transitions, 52949 flow [2020-10-11 16:27:40,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 16:27:40,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-11 16:27:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1468 transitions. [2020-10-11 16:27:40,429 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8307866440294284 [2020-10-11 16:27:40,429 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1468 transitions. [2020-10-11 16:27:40,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1468 transitions. [2020-10-11 16:27:40,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:27:40,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1468 transitions. [2020-10-11 16:27:40,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-11 16:27:40,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-11 16:27:40,431 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-11 16:27:40,431 INFO L185 Difference]: Start difference. First operand has 572 places, 1298 transitions, 47910 flow. Second operand 31 states and 1468 transitions. [2020-10-11 16:27:40,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 1370 transitions, 52949 flow [2020-10-11 16:27:42,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 1370 transitions, 52713 flow, removed 11 selfloop flow, removed 21 redundant places. [2020-10-11 16:27:42,649 INFO L241 Difference]: Finished difference. Result has 585 places, 1308 transitions, 48734 flow [2020-10-11 16:27:42,650 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=47688, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1092, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=48734, PETRI_PLACES=585, PETRI_TRANSITIONS=1308} [2020-10-11 16:27:42,650 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 528 predicate places. [2020-10-11 16:27:42,650 INFO L481 AbstractCegarLoop]: Abstraction has has 585 places, 1308 transitions, 48734 flow [2020-10-11 16:27:42,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:27:42,650 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:27:42,651 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:27:42,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-11 16:27:42,860 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:27:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:27:42,860 INFO L82 PathProgramCache]: Analyzing trace with hash -493666968, now seen corresponding path program 19 times [2020-10-11 16:27:42,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:27:42,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844579302] [2020-10-11 16:27:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:27:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:27:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:27:43,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844579302] [2020-10-11 16:27:43,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565521878] [2020-10-11 16:27:43,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:27:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:27:43,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:27:43,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:27:43,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:27:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:27:43,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:27:43,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:27:43,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282630767] [2020-10-11 16:27:43,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:27:43,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:27:43,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:27:43,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:27:43,825 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:27:43,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 1308 transitions, 48734 flow. Second operand 20 states. [2020-10-11 16:27:43,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:27:43,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:27:43,827 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:27:51,445 INFO L129 PetriNetUnfolder]: 863/6403 cut-off events. [2020-10-11 16:27:51,445 INFO L130 PetriNetUnfolder]: For 162956/163771 co-relation queries the response was YES. [2020-10-11 16:27:51,583 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39074 conditions, 6403 events. 863/6403 cut-off events. For 162956/163771 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 80774 event pairs, 0 based on Foata normal form. 42/5761 useless extension candidates. Maximal degree in co-relation 38860. Up to 1387 conditions per place. [2020-10-11 16:27:51,615 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 1143 selfloop transitions, 219 changer transitions 8/1406 dead transitions. [2020-10-11 16:27:51,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 1406 transitions, 54849 flow [2020-10-11 16:27:51,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 16:27:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-11 16:27:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1376 transitions. [2020-10-11 16:27:51,618 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8324258923169994 [2020-10-11 16:27:51,618 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1376 transitions. [2020-10-11 16:27:51,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1376 transitions. [2020-10-11 16:27:51,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:27:51,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1376 transitions. [2020-10-11 16:27:51,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-11 16:27:51,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-11 16:27:51,621 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-11 16:27:51,621 INFO L185 Difference]: Start difference. First operand has 585 places, 1308 transitions, 48734 flow. Second operand 29 states and 1376 transitions. [2020-10-11 16:27:51,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 1406 transitions, 54849 flow [2020-10-11 16:27:55,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 1406 transitions, 54604 flow, removed 13 selfloop flow, removed 22 redundant places. [2020-10-11 16:27:55,111 INFO L241 Difference]: Finished difference. Result has 597 places, 1330 transitions, 49974 flow [2020-10-11 16:27:55,113 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=48511, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1096, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=49974, PETRI_PLACES=597, PETRI_TRANSITIONS=1330} [2020-10-11 16:27:55,113 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 540 predicate places. [2020-10-11 16:27:55,113 INFO L481 AbstractCegarLoop]: Abstraction has has 597 places, 1330 transitions, 49974 flow [2020-10-11 16:27:55,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:27:55,113 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:27:55,113 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:27:55,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:27:55,314 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:27:55,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:27:55,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1062262126, now seen corresponding path program 20 times [2020-10-11 16:27:55,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:27:55,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832378691] [2020-10-11 16:27:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:27:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:27:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:27:55,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832378691] [2020-10-11 16:27:55,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685746621] [2020-10-11 16:27:55,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:27:55,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:27:55,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:27:55,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:27:55,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:27:55,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:27:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:27:55,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:27:55,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:27:55,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458472032] [2020-10-11 16:27:55,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:27:55,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:27:55,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:27:55,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:27:56,633 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:27:56,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 1330 transitions, 49974 flow. Second operand 20 states. [2020-10-11 16:27:56,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:27:56,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:27:56,634 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:27:59,839 INFO L129 PetriNetUnfolder]: 895/6713 cut-off events. [2020-10-11 16:27:59,840 INFO L130 PetriNetUnfolder]: For 166922/167685 co-relation queries the response was YES. [2020-10-11 16:27:59,961 INFO L80 FinitePrefix]: Finished finitePrefix Result has 40684 conditions, 6713 events. 895/6713 cut-off events. For 166922/167685 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 85897 event pairs, 0 based on Foata normal form. 43/6037 useless extension candidates. Maximal degree in co-relation 40464. Up to 1332 conditions per place. [2020-10-11 16:27:59,994 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 1055 selfloop transitions, 346 changer transitions 5/1442 dead transitions. [2020-10-11 16:27:59,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 1442 transitions, 56639 flow [2020-10-11 16:27:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 16:27:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-11 16:27:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1752 transitions. [2020-10-11 16:27:59,996 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8307254623044097 [2020-10-11 16:27:59,996 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1752 transitions. [2020-10-11 16:27:59,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1752 transitions. [2020-10-11 16:27:59,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:27:59,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1752 transitions. [2020-10-11 16:27:59,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 38 states. [2020-10-11 16:28:00,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 38 states. [2020-10-11 16:28:00,000 INFO L81 ComplementDD]: Finished complementDD. Result 38 states. [2020-10-11 16:28:00,000 INFO L185 Difference]: Start difference. First operand has 597 places, 1330 transitions, 49974 flow. Second operand 37 states and 1752 transitions. [2020-10-11 16:28:00,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 1442 transitions, 56639 flow [2020-10-11 16:28:02,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 1442 transitions, 56471 flow, removed 38 selfloop flow, removed 19 redundant places. [2020-10-11 16:28:02,249 INFO L241 Difference]: Finished difference. Result has 621 places, 1379 transitions, 52748 flow [2020-10-11 16:28:02,250 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=49815, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=991, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=52748, PETRI_PLACES=621, PETRI_TRANSITIONS=1379} [2020-10-11 16:28:02,251 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 564 predicate places. [2020-10-11 16:28:02,251 INFO L481 AbstractCegarLoop]: Abstraction has has 621 places, 1379 transitions, 52748 flow [2020-10-11 16:28:02,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:28:02,251 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:28:02,251 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:28:02,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-11 16:28:02,452 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:28:02,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:28:02,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1272034414, now seen corresponding path program 21 times [2020-10-11 16:28:02,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:28:02,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584603357] [2020-10-11 16:28:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:28:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:28:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:28:02,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584603357] [2020-10-11 16:28:02,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820657431] [2020-10-11 16:28:02,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:28:02,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 16:28:02,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:28:02,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:28:02,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:28:03,135 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:28:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:28:03,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:28:03,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:28:03,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823571314] [2020-10-11 16:28:03,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:28:03,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:28:03,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:28:03,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:28:03,934 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:28:03,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1379 transitions, 52748 flow. Second operand 20 states. [2020-10-11 16:28:03,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:28:03,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:28:03,936 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:28:07,548 INFO L129 PetriNetUnfolder]: 905/6789 cut-off events. [2020-10-11 16:28:07,548 INFO L130 PetriNetUnfolder]: For 174548/175350 co-relation queries the response was YES. [2020-10-11 16:28:08,006 INFO L80 FinitePrefix]: Finished finitePrefix Result has 41760 conditions, 6789 events. 905/6789 cut-off events. For 174548/175350 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 87143 event pairs, 0 based on Foata normal form. 43/6104 useless extension candidates. Maximal degree in co-relation 41532. Up to 1375 conditions per place. [2020-10-11 16:28:08,037 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 1084 selfloop transitions, 325 changer transitions 5/1450 dead transitions. [2020-10-11 16:28:08,037 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1450 transitions, 58023 flow [2020-10-11 16:28:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 16:28:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-11 16:28:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1705 transitions. [2020-10-11 16:28:08,039 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.830896686159844 [2020-10-11 16:28:08,039 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1705 transitions. [2020-10-11 16:28:08,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1705 transitions. [2020-10-11 16:28:08,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:28:08,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1705 transitions. [2020-10-11 16:28:08,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-11 16:28:08,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-11 16:28:08,041 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-11 16:28:08,042 INFO L185 Difference]: Start difference. First operand has 621 places, 1379 transitions, 52748 flow. Second operand 36 states and 1705 transitions. [2020-10-11 16:28:08,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1450 transitions, 58023 flow [2020-10-11 16:28:10,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 629 places, 1450 transitions, 57764 flow, removed 43 selfloop flow, removed 25 redundant places. [2020-10-11 16:28:10,214 INFO L241 Difference]: Finished difference. Result has 635 places, 1393 transitions, 54032 flow [2020-10-11 16:28:10,215 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=52499, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1054, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=54032, PETRI_PLACES=635, PETRI_TRANSITIONS=1393} [2020-10-11 16:28:10,215 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 578 predicate places. [2020-10-11 16:28:10,215 INFO L481 AbstractCegarLoop]: Abstraction has has 635 places, 1393 transitions, 54032 flow [2020-10-11 16:28:10,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:28:10,215 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:28:10,215 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:28:10,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:28:10,416 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:28:10,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:28:10,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1225101572, now seen corresponding path program 22 times [2020-10-11 16:28:10,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:28:10,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099497537] [2020-10-11 16:28:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:28:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:28:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:28:10,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099497537] [2020-10-11 16:28:10,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417259645] [2020-10-11 16:28:10,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:28:10,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:28:10,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:28:10,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 16:28:10,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:28:10,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:28:11,027 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:28:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:28:11,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:28:11,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:28:11,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94077787] [2020-10-11 16:28:11,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:28:11,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:28:11,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:28:11,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:28:12,336 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:28:12,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 1393 transitions, 54032 flow. Second operand 20 states. [2020-10-11 16:28:12,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:28:12,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:28:12,337 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:28:18,312 INFO L129 PetriNetUnfolder]: 1013/7526 cut-off events. [2020-10-11 16:28:18,312 INFO L130 PetriNetUnfolder]: For 238997/240082 co-relation queries the response was YES. [2020-10-11 16:28:18,438 INFO L80 FinitePrefix]: Finished finitePrefix Result has 47555 conditions, 7526 events. 1013/7526 cut-off events. For 238997/240082 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 98456 event pairs, 0 based on Foata normal form. 200/6922 useless extension candidates. Maximal degree in co-relation 47325. Up to 1168 conditions per place. [2020-10-11 16:28:18,474 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 329 selfloop transitions, 1193 changer transitions 28/1586 dead transitions. [2020-10-11 16:28:18,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 1586 transitions, 65846 flow [2020-10-11 16:28:18,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-11 16:28:18,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 16:28:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3387 transitions. [2020-10-11 16:28:18,477 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8369162342475908 [2020-10-11 16:28:18,477 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3387 transitions. [2020-10-11 16:28:18,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3387 transitions. [2020-10-11 16:28:18,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:28:18,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3387 transitions. [2020-10-11 16:28:18,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 72 states. [2020-10-11 16:28:18,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 72 states. [2020-10-11 16:28:18,481 INFO L81 ComplementDD]: Finished complementDD. Result 72 states. [2020-10-11 16:28:18,481 INFO L185 Difference]: Start difference. First operand has 635 places, 1393 transitions, 54032 flow. Second operand 71 states and 3387 transitions. [2020-10-11 16:28:18,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 1586 transitions, 65846 flow [2020-10-11 16:28:21,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 1586 transitions, 65402 flow, removed 32 selfloop flow, removed 30 redundant places. [2020-10-11 16:28:21,133 INFO L241 Difference]: Finished difference. Result has 692 places, 1532 transitions, 62589 flow [2020-10-11 16:28:21,135 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=53651, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1067, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=62589, PETRI_PLACES=692, PETRI_TRANSITIONS=1532} [2020-10-11 16:28:21,135 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 635 predicate places. [2020-10-11 16:28:21,135 INFO L481 AbstractCegarLoop]: Abstraction has has 692 places, 1532 transitions, 62589 flow [2020-10-11 16:28:21,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:28:21,135 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:28:21,136 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:28:21,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-11 16:28:21,350 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:28:21,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:28:21,350 INFO L82 PathProgramCache]: Analyzing trace with hash 190942162, now seen corresponding path program 23 times [2020-10-11 16:28:21,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:28:21,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570234] [2020-10-11 16:28:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:28:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:28:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:28:21,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570234] [2020-10-11 16:28:21,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80573537] [2020-10-11 16:28:21,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:28:21,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 16:28:21,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:28:21,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:28:21,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:28:21,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:28:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:28:21,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:28:21,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:28:21,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594648405] [2020-10-11 16:28:21,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:28:21,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:28:21,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:28:21,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:28:22,697 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:28:22,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 1532 transitions, 62589 flow. Second operand 20 states. [2020-10-11 16:28:22,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:28:22,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:28:22,699 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:28:27,362 INFO L129 PetriNetUnfolder]: 1073/8101 cut-off events. [2020-10-11 16:28:27,362 INFO L130 PetriNetUnfolder]: For 234529/235760 co-relation queries the response was YES. [2020-10-11 16:28:27,533 INFO L80 FinitePrefix]: Finished finitePrefix Result has 52097 conditions, 8101 events. 1073/8101 cut-off events. For 234529/235760 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 107530 event pairs, 0 based on Foata normal form. 77/7310 useless extension candidates. Maximal degree in co-relation 51849. Up to 1376 conditions per place. [2020-10-11 16:28:27,574 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 1009 selfloop transitions, 656 changer transitions 5/1706 dead transitions. [2020-10-11 16:28:27,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 725 places, 1706 transitions, 72750 flow [2020-10-11 16:28:27,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 16:28:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-11 16:28:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2087 transitions. [2020-10-11 16:28:27,577 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8321371610845295 [2020-10-11 16:28:27,577 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2087 transitions. [2020-10-11 16:28:27,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2087 transitions. [2020-10-11 16:28:27,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:28:27,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2087 transitions. [2020-10-11 16:28:27,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-11 16:28:27,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-11 16:28:27,579 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-11 16:28:27,579 INFO L185 Difference]: Start difference. First operand has 692 places, 1532 transitions, 62589 flow. Second operand 44 states and 2087 transitions. [2020-10-11 16:28:27,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 725 places, 1706 transitions, 72750 flow [2020-10-11 16:28:30,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 678 places, 1706 transitions, 70682 flow, removed 799 selfloop flow, removed 47 redundant places. [2020-10-11 16:28:30,899 INFO L241 Difference]: Finished difference. Result has 687 places, 1628 transitions, 66844 flow [2020-10-11 16:28:30,900 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=60851, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=574, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=66844, PETRI_PLACES=687, PETRI_TRANSITIONS=1628} [2020-10-11 16:28:30,901 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 630 predicate places. [2020-10-11 16:28:30,901 INFO L481 AbstractCegarLoop]: Abstraction has has 687 places, 1628 transitions, 66844 flow [2020-10-11 16:28:30,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:28:30,901 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:28:30,901 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:28:31,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-11 16:28:31,109 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:28:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:28:31,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1771891552, now seen corresponding path program 24 times [2020-10-11 16:28:31,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:28:31,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99592034] [2020-10-11 16:28:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:28:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:28:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:28:31,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99592034] [2020-10-11 16:28:31,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490427891] [2020-10-11 16:28:31,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:28:31,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 16:28:31,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:28:31,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:28:31,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:28:31,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:28:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:28:31,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:28:31,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:28:31,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452522855] [2020-10-11 16:28:31,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:28:31,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:28:31,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:28:31,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:28:31,833 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:28:31,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 1628 transitions, 66844 flow. Second operand 20 states. [2020-10-11 16:28:31,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:28:31,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:28:31,834 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:28:36,381 INFO L129 PetriNetUnfolder]: 1109/8425 cut-off events. [2020-10-11 16:28:36,382 INFO L130 PetriNetUnfolder]: For 240716/241852 co-relation queries the response was YES. [2020-10-11 16:28:36,736 INFO L80 FinitePrefix]: Finished finitePrefix Result has 54008 conditions, 8425 events. 1109/8425 cut-off events. For 240716/241852 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 112989 event pairs, 0 based on Foata normal form. 67/7588 useless extension candidates. Maximal degree in co-relation 53762. Up to 1573 conditions per place. [2020-10-11 16:28:36,781 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 1179 selfloop transitions, 530 changer transitions 5/1750 dead transitions. [2020-10-11 16:28:36,781 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 728 places, 1750 transitions, 74963 flow [2020-10-11 16:28:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 16:28:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-11 16:28:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2085 transitions. [2020-10-11 16:28:36,783 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8313397129186603 [2020-10-11 16:28:36,783 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2085 transitions. [2020-10-11 16:28:36,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2085 transitions. [2020-10-11 16:28:36,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:28:36,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2085 transitions. [2020-10-11 16:28:36,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 45 states. [2020-10-11 16:28:36,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 45 states. [2020-10-11 16:28:36,787 INFO L81 ComplementDD]: Finished complementDD. Result 45 states. [2020-10-11 16:28:36,787 INFO L185 Difference]: Start difference. First operand has 687 places, 1628 transitions, 66844 flow. Second operand 44 states and 2085 transitions. [2020-10-11 16:28:36,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 728 places, 1750 transitions, 74963 flow [2020-10-11 16:28:40,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1750 transitions, 74340 flow, removed 181 selfloop flow, removed 30 redundant places. [2020-10-11 16:28:40,421 INFO L241 Difference]: Finished difference. Result has 706 places, 1674 transitions, 69996 flow [2020-10-11 16:28:40,422 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=66243, PETRI_DIFFERENCE_MINUEND_PLACES=655, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=486, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=69996, PETRI_PLACES=706, PETRI_TRANSITIONS=1674} [2020-10-11 16:28:40,422 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 649 predicate places. [2020-10-11 16:28:40,422 INFO L481 AbstractCegarLoop]: Abstraction has has 706 places, 1674 transitions, 69996 flow [2020-10-11 16:28:40,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:28:40,423 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:28:40,423 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:28:40,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-11 16:28:40,624 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:28:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:28:40,624 INFO L82 PathProgramCache]: Analyzing trace with hash 846280082, now seen corresponding path program 25 times [2020-10-11 16:28:40,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:28:40,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83191077] [2020-10-11 16:28:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:28:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:28:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:28:40,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83191077] [2020-10-11 16:28:40,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674156945] [2020-10-11 16:28:40,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:28:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:28:40,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:28:40,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:28:41,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:28:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:28:41,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:28:41,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:28:41,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475675003] [2020-10-11 16:28:41,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:28:41,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:28:41,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:28:41,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:28:42,110 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:28:42,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 706 places, 1674 transitions, 69996 flow. Second operand 20 states. [2020-10-11 16:28:42,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:28:42,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:28:42,111 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:28:47,368 INFO L129 PetriNetUnfolder]: 1134/8629 cut-off events. [2020-10-11 16:28:47,368 INFO L130 PetriNetUnfolder]: For 256569/257851 co-relation queries the response was YES. [2020-10-11 16:28:47,651 INFO L80 FinitePrefix]: Finished finitePrefix Result has 56009 conditions, 8629 events. 1134/8629 cut-off events. For 256569/257851 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 116029 event pairs, 0 based on Foata normal form. 149/7851 useless extension candidates. Maximal degree in co-relation 55759. Up to 1315 conditions per place. [2020-10-11 16:28:47,697 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 728 selfloop transitions, 970 changer transitions 5/1739 dead transitions. [2020-10-11 16:28:47,697 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 1739 transitions, 76372 flow [2020-10-11 16:28:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-11 16:28:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 16:28:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2521 transitions. [2020-10-11 16:28:47,700 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.834491890102615 [2020-10-11 16:28:47,700 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2521 transitions. [2020-10-11 16:28:47,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2521 transitions. [2020-10-11 16:28:47,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:28:47,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2521 transitions. [2020-10-11 16:28:47,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 54 states. [2020-10-11 16:28:47,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 54 states. [2020-10-11 16:28:47,703 INFO L81 ComplementDD]: Finished complementDD. Result 54 states. [2020-10-11 16:28:47,703 INFO L185 Difference]: Start difference. First operand has 706 places, 1674 transitions, 69996 flow. Second operand 53 states and 2521 transitions. [2020-10-11 16:28:47,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 1739 transitions, 76372 flow [2020-10-11 16:28:50,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 722 places, 1739 transitions, 75983 flow, removed 78 selfloop flow, removed 34 redundant places. [2020-10-11 16:28:51,029 INFO L241 Difference]: Finished difference. Result has 726 places, 1703 transitions, 73612 flow [2020-10-11 16:28:51,030 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=69618, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=943, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=73612, PETRI_PLACES=726, PETRI_TRANSITIONS=1703} [2020-10-11 16:28:51,030 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 669 predicate places. [2020-10-11 16:28:51,030 INFO L481 AbstractCegarLoop]: Abstraction has has 726 places, 1703 transitions, 73612 flow [2020-10-11 16:28:51,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:28:51,031 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:28:51,031 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:28:51,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-11 16:28:51,232 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:28:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:28:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1556847722, now seen corresponding path program 26 times [2020-10-11 16:28:51,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:28:51,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179266187] [2020-10-11 16:28:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:28:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:28:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:28:51,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179266187] [2020-10-11 16:28:51,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407368291] [2020-10-11 16:28:51,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:28:51,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 16:28:51,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:28:51,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:28:51,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:28:51,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:28:51,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:28:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:28:51,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:28:51,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-10-11 16:28:51,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582654496] [2020-10-11 16:28:51,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 16:28:51,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:28:51,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 16:28:51,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-11 16:28:52,796 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:28:52,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 726 places, 1703 transitions, 73612 flow. Second operand 19 states. [2020-10-11 16:28:52,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:28:52,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:28:52,797 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:28:58,516 INFO L129 PetriNetUnfolder]: 1184/8958 cut-off events. [2020-10-11 16:28:58,516 INFO L130 PetriNetUnfolder]: For 296869/298335 co-relation queries the response was YES. [2020-10-11 16:28:58,847 INFO L80 FinitePrefix]: Finished finitePrefix Result has 59974 conditions, 8958 events. 1184/8958 cut-off events. For 296869/298335 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 121412 event pairs, 0 based on Foata normal form. 242/8240 useless extension candidates. Maximal degree in co-relation 59723. Up to 1394 conditions per place. [2020-10-11 16:28:58,895 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 392 selfloop transitions, 1357 changer transitions 11/1796 dead transitions. [2020-10-11 16:28:58,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 1796 transitions, 82101 flow [2020-10-11 16:28:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-11 16:28:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 16:28:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2575 transitions. [2020-10-11 16:28:58,898 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.836582196231319 [2020-10-11 16:28:58,898 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2575 transitions. [2020-10-11 16:28:58,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2575 transitions. [2020-10-11 16:28:58,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:28:58,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2575 transitions. [2020-10-11 16:28:58,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 55 states. [2020-10-11 16:28:58,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 55 states. [2020-10-11 16:28:58,903 INFO L81 ComplementDD]: Finished complementDD. Result 55 states. [2020-10-11 16:28:58,903 INFO L185 Difference]: Start difference. First operand has 726 places, 1703 transitions, 73612 flow. Second operand 54 states and 2575 transitions. [2020-10-11 16:28:58,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 1796 transitions, 82101 flow [2020-10-11 16:29:03,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 1796 transitions, 81412 flow, removed 110 selfloop flow, removed 39 redundant places. [2020-10-11 16:29:03,387 INFO L241 Difference]: Finished difference. Result has 746 places, 1770 transitions, 80099 flow [2020-10-11 16:29:03,388 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=72949, PETRI_DIFFERENCE_MINUEND_PLACES=685, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=80099, PETRI_PLACES=746, PETRI_TRANSITIONS=1770} [2020-10-11 16:29:03,388 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 689 predicate places. [2020-10-11 16:29:03,388 INFO L481 AbstractCegarLoop]: Abstraction has has 746 places, 1770 transitions, 80099 flow [2020-10-11 16:29:03,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 16:29:03,389 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:29:03,389 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:29:03,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:29:03,590 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:29:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:29:03,590 INFO L82 PathProgramCache]: Analyzing trace with hash -73128234, now seen corresponding path program 27 times [2020-10-11 16:29:03,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:29:03,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39124896] [2020-10-11 16:29:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:29:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:29:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:29:03,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39124896] [2020-10-11 16:29:03,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140455036] [2020-10-11 16:29:03,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:29:03,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 16:29:03,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:29:03,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:29:03,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:29:04,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:29:04,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:29:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:29:04,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:29:04,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:29:04,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642470153] [2020-10-11 16:29:04,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:29:04,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:29:04,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:29:04,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:29:05,043 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:29:05,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 1770 transitions, 80099 flow. Second operand 20 states. [2020-10-11 16:29:05,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:29:05,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:29:05,044 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:29:11,542 INFO L129 PetriNetUnfolder]: 1220/9305 cut-off events. [2020-10-11 16:29:11,542 INFO L130 PetriNetUnfolder]: For 312263/313787 co-relation queries the response was YES. [2020-10-11 16:29:11,717 INFO L80 FinitePrefix]: Finished finitePrefix Result has 64040 conditions, 9305 events. 1220/9305 cut-off events. For 312263/313787 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 127219 event pairs, 0 based on Foata normal form. 82/8388 useless extension candidates. Maximal degree in co-relation 63781. Up to 1627 conditions per place. [2020-10-11 16:29:11,765 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 1157 selfloop transitions, 703 changer transitions 5/1901 dead transitions. [2020-10-11 16:29:11,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 788 places, 1901 transitions, 89180 flow [2020-10-11 16:29:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-11 16:29:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-11 16:29:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2229 transitions. [2020-10-11 16:29:11,767 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.832026875699888 [2020-10-11 16:29:11,767 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2229 transitions. [2020-10-11 16:29:11,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2229 transitions. [2020-10-11 16:29:11,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:29:11,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2229 transitions. [2020-10-11 16:29:11,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-11 16:29:11,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-11 16:29:11,771 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-11 16:29:11,772 INFO L185 Difference]: Start difference. First operand has 746 places, 1770 transitions, 80099 flow. Second operand 47 states and 2229 transitions. [2020-10-11 16:29:11,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 788 places, 1901 transitions, 89180 flow [2020-10-11 16:29:16,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 1901 transitions, 87775 flow, removed 344 selfloop flow, removed 46 redundant places. [2020-10-11 16:29:16,369 INFO L241 Difference]: Finished difference. Result has 749 places, 1815 transitions, 83008 flow [2020-10-11 16:29:16,370 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=78741, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=658, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1072, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=83008, PETRI_PLACES=749, PETRI_TRANSITIONS=1815} [2020-10-11 16:29:16,370 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 692 predicate places. [2020-10-11 16:29:16,370 INFO L481 AbstractCegarLoop]: Abstraction has has 749 places, 1815 transitions, 83008 flow [2020-10-11 16:29:16,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:29:16,371 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:29:16,371 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:29:16,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-10-11 16:29:16,572 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:29:16,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:29:16,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1321558044, now seen corresponding path program 28 times [2020-10-11 16:29:16,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:29:16,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668558689] [2020-10-11 16:29:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:29:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:29:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:29:16,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668558689] [2020-10-11 16:29:16,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125673305] [2020-10-11 16:29:16,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:29:16,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 16:29:16,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:29:16,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 16:29:16,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:29:17,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:29:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:29:17,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:29:17,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:29:17,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303085311] [2020-10-11 16:29:17,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:29:17,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:29:17,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:29:17,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:29:18,324 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:29:18,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 1815 transitions, 83008 flow. Second operand 20 states. [2020-10-11 16:29:18,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:29:18,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:29:18,325 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:29:25,090 INFO L129 PetriNetUnfolder]: 1271/9764 cut-off events. [2020-10-11 16:29:25,091 INFO L130 PetriNetUnfolder]: For 329470/330950 co-relation queries the response was YES. [2020-10-11 16:29:25,384 INFO L80 FinitePrefix]: Finished finitePrefix Result has 67338 conditions, 9764 events. 1271/9764 cut-off events. For 329470/330950 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 134937 event pairs, 0 based on Foata normal form. 98/8812 useless extension candidates. Maximal degree in co-relation 67077. Up to 1596 conditions per place. [2020-10-11 16:29:25,437 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 1068 selfloop transitions, 846 changer transitions 5/1955 dead transitions. [2020-10-11 16:29:25,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 1955 transitions, 92859 flow [2020-10-11 16:29:25,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-11 16:29:25,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 16:29:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2374 transitions. [2020-10-11 16:29:25,439 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8329824561403508 [2020-10-11 16:29:25,439 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2374 transitions. [2020-10-11 16:29:25,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2374 transitions. [2020-10-11 16:29:25,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:29:25,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2374 transitions. [2020-10-11 16:29:25,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 51 states. [2020-10-11 16:29:25,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 51 states. [2020-10-11 16:29:25,442 INFO L81 ComplementDD]: Finished complementDD. Result 51 states. [2020-10-11 16:29:25,443 INFO L185 Difference]: Start difference. First operand has 749 places, 1815 transitions, 83008 flow. Second operand 50 states and 2374 transitions. [2020-10-11 16:29:25,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 1955 transitions, 92859 flow [2020-10-11 16:29:29,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 760 places, 1955 transitions, 91985 flow, removed 98 selfloop flow, removed 36 redundant places. [2020-10-11 16:29:30,060 INFO L241 Difference]: Finished difference. Result has 767 places, 1871 transitions, 87694 flow [2020-10-11 16:29:30,061 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=82156, PETRI_DIFFERENCE_MINUEND_PLACES=711, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=799, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=981, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=87694, PETRI_PLACES=767, PETRI_TRANSITIONS=1871} [2020-10-11 16:29:30,062 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 710 predicate places. [2020-10-11 16:29:30,062 INFO L481 AbstractCegarLoop]: Abstraction has has 767 places, 1871 transitions, 87694 flow [2020-10-11 16:29:30,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:29:30,062 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:29:30,062 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:29:30,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:29:30,263 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:29:30,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:29:30,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2091929390, now seen corresponding path program 29 times [2020-10-11 16:29:30,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:29:30,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431216191] [2020-10-11 16:29:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:29:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:29:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:29:30,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431216191] [2020-10-11 16:29:30,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210603534] [2020-10-11 16:29:30,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:29:30,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 16:29:30,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:29:30,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:29:30,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:29:30,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:29:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:29:30,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:29:30,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:29:30,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156235872] [2020-10-11 16:29:30,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:29:30,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:29:30,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:29:30,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-11 16:29:31,626 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:29:31,627 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 767 places, 1871 transitions, 87694 flow. Second operand 20 states. [2020-10-11 16:29:31,627 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:29:31,627 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:29:31,627 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:29:39,343 INFO L129 PetriNetUnfolder]: 1286/9871 cut-off events. [2020-10-11 16:29:39,344 INFO L130 PetriNetUnfolder]: For 350914/352548 co-relation queries the response was YES. [2020-10-11 16:29:39,861 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69023 conditions, 9871 events. 1286/9871 cut-off events. For 350914/352548 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 136717 event pairs, 0 based on Foata normal form. 132/8941 useless extension candidates. Maximal degree in co-relation 68760. Up to 1543 conditions per place. [2020-10-11 16:29:39,918 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 898 selfloop transitions, 1004 changer transitions 5/1943 dead transitions. [2020-10-11 16:29:39,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 1943 transitions, 94664 flow [2020-10-11 16:29:39,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-11 16:29:39,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 16:29:39,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2472 transitions. [2020-10-11 16:29:39,921 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8340080971659919 [2020-10-11 16:29:39,921 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2472 transitions. [2020-10-11 16:29:39,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2472 transitions. [2020-10-11 16:29:39,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:29:39,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2472 transitions. [2020-10-11 16:29:39,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 53 states. [2020-10-11 16:29:39,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 53 states. [2020-10-11 16:29:39,925 INFO L81 ComplementDD]: Finished complementDD. Result 53 states. [2020-10-11 16:29:39,925 INFO L185 Difference]: Start difference. First operand has 767 places, 1871 transitions, 87694 flow. Second operand 52 states and 2472 transitions. [2020-10-11 16:29:39,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 1943 transitions, 94664 flow [2020-10-11 16:29:45,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 782 places, 1943 transitions, 94252 flow, removed 86 selfloop flow, removed 34 redundant places. [2020-10-11 16:29:45,258 INFO L241 Difference]: Finished difference. Result has 785 places, 1886 transitions, 90934 flow [2020-10-11 16:29:45,260 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=87292, PETRI_DIFFERENCE_MINUEND_PLACES=731, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=989, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=867, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=90934, PETRI_PLACES=785, PETRI_TRANSITIONS=1886} [2020-10-11 16:29:45,260 INFO L341 CegarLoopForPetriNet]: 57 programPoint places, 728 predicate places. [2020-10-11 16:29:45,260 INFO L481 AbstractCegarLoop]: Abstraction has has 785 places, 1886 transitions, 90934 flow [2020-10-11 16:29:45,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 16:29:45,260 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 16:29:45,261 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 16:29:45,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-11 16:29:45,473 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 16:29:45,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 16:29:45,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1431357092, now seen corresponding path program 30 times [2020-10-11 16:29:45,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 16:29:45,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651643070] [2020-10-11 16:29:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 16:29:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 16:29:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:29:45,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651643070] [2020-10-11 16:29:45,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952616273] [2020-10-11 16:29:45,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 16:29:45,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 16:29:45,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 16:29:45,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 16:29:45,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 16:29:46,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:29:46,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 16:29:46,139 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-10-11 16:29:48,656 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30 [2020-10-11 16:29:48,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 16:29:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 16:29:48,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 16:29:48,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-10-11 16:29:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325707492] [2020-10-11 16:29:48,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 16:29:48,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 16:29:48,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 16:29:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=309, Unknown=1, NotChecked=0, Total=380 [2020-10-11 16:29:55,449 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 57 [2020-10-11 16:29:55,449 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 785 places, 1886 transitions, 90934 flow. Second operand 20 states. [2020-10-11 16:29:55,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 16:29:55,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 57 [2020-10-11 16:29:55,450 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 16:30:15,964 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-10-11 16:30:40,487 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-11 16:30:50,841 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-11 16:30:57,013 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2020-10-11 16:31:46,113 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-11 16:31:52,207 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 36 [2020-10-11 16:32:10,383 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-11 16:32:20,574 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-11 16:32:32,731 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-11 16:33:33,570 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 40 [2020-10-11 16:34:05,954 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-11 16:35:06,976 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 49 [2020-10-11 16:35:29,281 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-11 16:35:41,546 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-11 16:36:44,688 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-10-11 16:37:31,694 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-11 16:37:43,901 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 41 [2020-10-11 16:38:17,807 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-11 16:38:20,441 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-11 16:39:04,447 INFO L129 PetriNetUnfolder]: 1349/10308 cut-off events. [2020-10-11 16:39:04,447 INFO L130 PetriNetUnfolder]: For 418067/419970 co-relation queries the response was YES. [2020-10-11 16:39:04,861 INFO L80 FinitePrefix]: Finished finitePrefix Result has 74459 conditions, 10308 events. 1349/10308 cut-off events. For 418067/419970 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 143771 event pairs, 0 based on Foata normal form. 246/9447 useless extension candidates. Maximal degree in co-relation 74194. Up to 1653 conditions per place. [2020-10-11 16:39:04,919 INFO L132 encePairwiseOnDemand]: 50/57 looper letters, 484 selfloop transitions, 1498 changer transitions 17/2035 dead transitions. [2020-10-11 16:39:04,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 859 places, 2035 transitions, 103369 flow [2020-10-11 16:39:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-11 16:39:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 16:39:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 3661 transitions. [2020-10-11 16:39:04,926 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8341307814992025 [2020-10-11 16:39:04,926 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 3661 transitions. [2020-10-11 16:39:04,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 3661 transitions. [2020-10-11 16:39:04,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 16:39:04,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 3661 transitions. [2020-10-11 16:39:04,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 78 states. [2020-10-11 16:39:04,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 78 states. [2020-10-11 16:39:04,930 INFO L81 ComplementDD]: Finished complementDD. Result 78 states. [2020-10-11 16:39:04,930 INFO L185 Difference]: Start difference. First operand has 785 places, 1886 transitions, 90934 flow. Second operand 77 states and 3661 transitions. [2020-10-11 16:39:04,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 859 places, 2035 transitions, 103369 flow Received shutdown request... [2020-10-11 16:39:06,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-11 16:39:06,830 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-11 16:39:06,836 WARN L235 ceAbstractionStarter]: Timeout [2020-10-11 16:39:06,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 04:39:06 BasicIcfg [2020-10-11 16:39:06,836 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 16:39:06,837 INFO L168 Benchmark]: Toolchain (without parser) took 851541.01 ms. Allocated memory was 250.1 MB in the beginning and 3.6 GB in the end (delta: 3.4 GB). Free memory was 205.4 MB in the beginning and 1.2 GB in the end (delta: -977.6 MB). Peak memory consumption was 2.4 GB. Max. memory is 14.2 GB. [2020-10-11 16:39:06,838 INFO L168 Benchmark]: CDTParser took 1.70 ms. Allocated memory is still 250.1 MB. Free memory is still 226.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 16:39:06,838 INFO L168 Benchmark]: CACSL2BoogieTranslator took 679.89 ms. Allocated memory was 250.1 MB in the beginning and 311.4 MB in the end (delta: 61.3 MB). Free memory was 205.4 MB in the beginning and 267.1 MB in the end (delta: -61.7 MB). Peak memory consumption was 29.8 MB. Max. memory is 14.2 GB. [2020-10-11 16:39:06,838 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.57 ms. Allocated memory is still 311.4 MB. Free memory was 267.1 MB in the beginning and 264.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 16:39:06,838 INFO L168 Benchmark]: Boogie Preprocessor took 26.30 ms. Allocated memory is still 311.4 MB. Free memory is still 264.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 16:39:06,839 INFO L168 Benchmark]: RCFGBuilder took 403.37 ms. Allocated memory is still 311.4 MB. Free memory was 264.6 MB in the beginning and 242.7 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-11 16:39:06,839 INFO L168 Benchmark]: TraceAbstraction took 850383.90 ms. Allocated memory was 311.4 MB in the beginning and 3.6 GB in the end (delta: 3.3 GB). Free memory was 242.7 MB in the beginning and 1.2 GB in the end (delta: -940.3 MB). Peak memory consumption was 2.4 GB. Max. memory is 14.2 GB. [2020-10-11 16:39:06,841 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.70 ms. Allocated memory is still 250.1 MB. Free memory is still 226.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 679.89 ms. Allocated memory was 250.1 MB in the beginning and 311.4 MB in the end (delta: 61.3 MB). Free memory was 205.4 MB in the beginning and 267.1 MB in the end (delta: -61.7 MB). Peak memory consumption was 29.8 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 42.57 ms. Allocated memory is still 311.4 MB. Free memory was 267.1 MB in the beginning and 264.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.30 ms. Allocated memory is still 311.4 MB. Free memory is still 264.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 403.37 ms. Allocated memory is still 311.4 MB. Free memory was 264.6 MB in the beginning and 242.7 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 850383.90 ms. Allocated memory was 311.4 MB in the beginning and 3.6 GB in the end (delta: 3.3 GB). Free memory was 242.7 MB in the beginning and 1.2 GB in the end (delta: -940.3 MB). Peak memory consumption was 2.4 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while executing RemoveRedundantFlow. - 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: 850.2s, OverallIterations: 56, TraceHistogramMax: 5, AutomataDifference: 807.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 333 SDtfs, 2844 SDslu, 3007 SDs, 0 SdLazy, 18037 SolverSat, 3446 SolverUnsat, 85 SolverUnknown, 0 SolverNotchecked, 187.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4151 GetRequests, 2047 SyntacticMatches, 11 SemanticMatches, 2093 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27558 ImplicationChecksByTransitivity, 474.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90934occurred in iteration=55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 29.1s InterpolantComputationTime, 4865 NumberOfCodeBlocks, 4865 NumberOfCodeBlocksAsserted, 183 NumberOfCheckSat, 4760 ConstructedInterpolants, 18 QuantifiedInterpolants, 2388347 SizeOfPredicates, 202 NumberOfNonLiveVariables, 5438 ConjunctsInSsa, 620 ConjunctsInUnsatCore, 105 InterpolantComputations, 7 PerfectInterpolantSequences, 0/1602 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