./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:10:05,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:10:05,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:10:05,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:10:05,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:10:05,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:10:05,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:10:05,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:10:05,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:10:05,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:10:05,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:10:05,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:10:05,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:10:05,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:10:05,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:10:05,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:10:05,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:10:05,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:10:05,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:10:05,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:10:05,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:10:05,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:10:05,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:10:05,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:10:05,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:10:05,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:10:05,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:10:05,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:10:05,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:10:05,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:10:05,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:10:05,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:10:05,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:10:05,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:10:05,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:10:05,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:10:05,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:10:05,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:10:05,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:10:05,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:10:05,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:10:05,086 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:10:05,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:10:05,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:10:05,104 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:10:05,104 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:10:05,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:10:05,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:10:05,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:10:05,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:10:05,105 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:10:05,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:10:05,106 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:10:05,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:10:05,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:10:05,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:10:05,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:10:05,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:10:05,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:10:05,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:10:05,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:10:05,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:10:05,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:10:05,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:10:05,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:10:05,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:10:05,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:10:05,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:10:05,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:10:05,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:10:05,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:10:05,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:10:05,108 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:10:05,108 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:10:05,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:10:05,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:10:05,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca [2021-12-06 21:10:05,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:10:05,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:10:05,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:10:05,299 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:10:05,299 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:10:05,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2021-12-06 21:10:05,343 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/data/a2518bd78/b22b4386001549dfa625960367d458cb/FLAG06384874b [2021-12-06 21:10:05,748 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:10:05,749 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2021-12-06 21:10:05,754 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/data/a2518bd78/b22b4386001549dfa625960367d458cb/FLAG06384874b [2021-12-06 21:10:05,763 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/data/a2518bd78/b22b4386001549dfa625960367d458cb [2021-12-06 21:10:05,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:10:05,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:10:05,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:10:05,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:10:05,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:10:05,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:10:05" (1/1) ... [2021-12-06 21:10:05,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9e2aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:05, skipping insertion in model container [2021-12-06 21:10:05,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:10:05" (1/1) ... [2021-12-06 21:10:05,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:10:05,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:10:05,929 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2474,2487] [2021-12-06 21:10:05,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:10:05,939 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:10:05,954 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2474,2487] [2021-12-06 21:10:05,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:10:05,967 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:10:05,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:05 WrapperNode [2021-12-06 21:10:05,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:10:05,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:10:05,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:10:05,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:10:05,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:05" (1/1) ... [2021-12-06 21:10:05,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:05" (1/1) ... [2021-12-06 21:10:05,997 INFO L137 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 141 [2021-12-06 21:10:05,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:10:05,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:10:05,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:10:05,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:10:06,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:05" (1/1) ... [2021-12-06 21:10:06,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:05" (1/1) ... [2021-12-06 21:10:06,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:05" (1/1) ... [2021-12-06 21:10:06,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:05" (1/1) ... [2021-12-06 21:10:06,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:05" (1/1) ... [2021-12-06 21:10:06,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:05" (1/1) ... [2021-12-06 21:10:06,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:05" (1/1) ... [2021-12-06 21:10:06,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:10:06,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:10:06,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:10:06,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:10:06,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:05" (1/1) ... [2021-12-06 21:10:06,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:10:06,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:06,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:10:06,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:10:06,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:10:06,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 21:10:06,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 21:10:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 21:10:06,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 21:10:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:10:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 21:10:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 21:10:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 21:10:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:10:06,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:10:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 21:10:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 21:10:06,095 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 21:10:06,157 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:10:06,159 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:10:06,358 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:10:06,369 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:10:06,369 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 21:10:06,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:10:06 BoogieIcfgContainer [2021-12-06 21:10:06,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:10:06,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:10:06,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:10:06,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:10:06,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:10:05" (1/3) ... [2021-12-06 21:10:06,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325156bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:10:06, skipping insertion in model container [2021-12-06 21:10:06,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:05" (2/3) ... [2021-12-06 21:10:06,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325156bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:10:06, skipping insertion in model container [2021-12-06 21:10:06,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:10:06" (3/3) ... [2021-12-06 21:10:06,379 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2021-12-06 21:10:06,384 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 21:10:06,384 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:10:06,385 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:10:06,385 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 21:10:06,418 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,418 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,418 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,418 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,419 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,419 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,419 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,419 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,419 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,436 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,441 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,441 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,441 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,441 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,441 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,441 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,442 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,445 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,446 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,446 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,446 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,446 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,446 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,447 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,447 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,447 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,447 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,447 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,450 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,451 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,451 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,451 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,451 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,451 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,451 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 21:10:06,454 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-06 21:10:06,498 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:10:06,504 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 21:10:06,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-06 21:10:06,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 171 places, 179 transitions, 374 flow [2021-12-06 21:10:06,568 INFO L129 PetriNetUnfolder]: 15/177 cut-off events. [2021-12-06 21:10:06,568 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 21:10:06,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 15/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2021-12-06 21:10:06,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 179 transitions, 374 flow [2021-12-06 21:10:06,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2021-12-06 21:10:06,602 INFO L129 PetriNetUnfolder]: 14/165 cut-off events. [2021-12-06 21:10:06,602 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 21:10:06,602 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:06,602 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:06,603 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:06,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:06,607 INFO L85 PathProgramCache]: Analyzing trace with hash -999352640, now seen corresponding path program 1 times [2021-12-06 21:10:06,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:06,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775345625] [2021-12-06 21:10:06,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:06,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:06,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:06,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775345625] [2021-12-06 21:10:06,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775345625] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:06,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:06,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:10:06,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014246855] [2021-12-06 21:10:06,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:06,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 21:10:06,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 21:10:06,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:10:06,816 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 179 [2021-12-06 21:10:06,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 168 transitions, 348 flow. Second operand has 2 states, 2 states have (on average 165.5) internal successors, (331), 2 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:06,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:06,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 179 [2021-12-06 21:10:06,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:06,854 INFO L129 PetriNetUnfolder]: 4/157 cut-off events. [2021-12-06 21:10:06,854 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-06 21:10:06,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 157 events. 4/157 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 200 event pairs, 0 based on Foata normal form. 14/159 useless extension candidates. Maximal degree in co-relation 97. Up to 5 conditions per place. [2021-12-06 21:10:06,856 INFO L132 encePairwiseOnDemand]: 168/179 looper letters, 4 selfloop transitions, 0 changer transitions 4/157 dead transitions. [2021-12-06 21:10:06,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 334 flow [2021-12-06 21:10:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:10:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-06 21:10:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 341 transitions. [2021-12-06 21:10:06,867 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.952513966480447 [2021-12-06 21:10:06,868 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 341 transitions. [2021-12-06 21:10:06,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 341 transitions. [2021-12-06 21:10:06,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:06,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 341 transitions. [2021-12-06 21:10:06,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 170.5) internal successors, (341), 2 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:06,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:06,882 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:06,884 INFO L186 Difference]: Start difference. First operand has 160 places, 168 transitions, 348 flow. Second operand 2 states and 341 transitions. [2021-12-06 21:10:06,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 334 flow [2021-12-06 21:10:06,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 157 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 21:10:06,894 INFO L242 Difference]: Finished difference. Result has 157 places, 153 transitions, 310 flow [2021-12-06 21:10:06,896 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=310, PETRI_PLACES=157, PETRI_TRANSITIONS=153} [2021-12-06 21:10:06,900 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, -3 predicate places. [2021-12-06 21:10:06,900 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 153 transitions, 310 flow [2021-12-06 21:10:06,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 165.5) internal successors, (331), 2 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:06,901 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:06,901 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:06,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:10:06,901 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2047656499, now seen corresponding path program 1 times [2021-12-06 21:10:06,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:06,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619022904] [2021-12-06 21:10:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:06,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:07,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:07,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619022904] [2021-12-06 21:10:07,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619022904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:07,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:07,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:10:07,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695704578] [2021-12-06 21:10:07,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:07,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:10:07,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:07,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:10:07,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:10:07,121 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2021-12-06 21:10:07,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 153 transitions, 310 flow. Second operand has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:07,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2021-12-06 21:10:07,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:07,353 INFO L129 PetriNetUnfolder]: 149/816 cut-off events. [2021-12-06 21:10:07,353 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2021-12-06 21:10:07,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 816 events. 149/816 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 5009 event pairs, 65 based on Foata normal form. 0/719 useless extension candidates. Maximal degree in co-relation 1109. Up to 152 conditions per place. [2021-12-06 21:10:07,359 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 48 selfloop transitions, 7 changer transitions 0/186 dead transitions. [2021-12-06 21:10:07,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 186 transitions, 491 flow [2021-12-06 21:10:07,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:10:07,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 21:10:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 927 transitions. [2021-12-06 21:10:07,365 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8631284916201117 [2021-12-06 21:10:07,365 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 927 transitions. [2021-12-06 21:10:07,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 927 transitions. [2021-12-06 21:10:07,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:07,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 927 transitions. [2021-12-06 21:10:07,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.5) internal successors, (927), 6 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,373 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,373 INFO L186 Difference]: Start difference. First operand has 157 places, 153 transitions, 310 flow. Second operand 6 states and 927 transitions. [2021-12-06 21:10:07,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 186 transitions, 491 flow [2021-12-06 21:10:07,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 186 transitions, 491 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 21:10:07,377 INFO L242 Difference]: Finished difference. Result has 161 places, 157 transitions, 352 flow [2021-12-06 21:10:07,378 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=161, PETRI_TRANSITIONS=157} [2021-12-06 21:10:07,378 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 1 predicate places. [2021-12-06 21:10:07,379 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 157 transitions, 352 flow [2021-12-06 21:10:07,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,379 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:07,379 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:07,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:10:07,380 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1248426905, now seen corresponding path program 2 times [2021-12-06 21:10:07,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:07,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982096185] [2021-12-06 21:10:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:07,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:07,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:07,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982096185] [2021-12-06 21:10:07,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982096185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:07,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:07,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:10:07,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715482905] [2021-12-06 21:10:07,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:07,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:10:07,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:07,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:10:07,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:10:07,500 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 179 [2021-12-06 21:10:07,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 157 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:07,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 179 [2021-12-06 21:10:07,501 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:07,668 INFO L129 PetriNetUnfolder]: 132/851 cut-off events. [2021-12-06 21:10:07,668 INFO L130 PetriNetUnfolder]: For 141/168 co-relation queries the response was YES. [2021-12-06 21:10:07,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 851 events. 132/851 cut-off events. For 141/168 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 5375 event pairs, 61 based on Foata normal form. 34/829 useless extension candidates. Maximal degree in co-relation 1253. Up to 165 conditions per place. [2021-12-06 21:10:07,674 INFO L132 encePairwiseOnDemand]: 173/179 looper letters, 33 selfloop transitions, 8 changer transitions 0/176 dead transitions. [2021-12-06 21:10:07,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 176 transitions, 496 flow [2021-12-06 21:10:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:10:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-06 21:10:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2021-12-06 21:10:07,676 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8784916201117319 [2021-12-06 21:10:07,676 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2021-12-06 21:10:07,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2021-12-06 21:10:07,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:07,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2021-12-06 21:10:07,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,681 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,681 INFO L186 Difference]: Start difference. First operand has 161 places, 157 transitions, 352 flow. Second operand 4 states and 629 transitions. [2021-12-06 21:10:07,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 176 transitions, 496 flow [2021-12-06 21:10:07,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 176 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-06 21:10:07,686 INFO L242 Difference]: Finished difference. Result has 164 places, 162 transitions, 398 flow [2021-12-06 21:10:07,686 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=398, PETRI_PLACES=164, PETRI_TRANSITIONS=162} [2021-12-06 21:10:07,687 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 4 predicate places. [2021-12-06 21:10:07,687 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 162 transitions, 398 flow [2021-12-06 21:10:07,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,687 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:07,687 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:07,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:10:07,688 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:07,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:07,688 INFO L85 PathProgramCache]: Analyzing trace with hash 561552515, now seen corresponding path program 1 times [2021-12-06 21:10:07,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:07,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910811054] [2021-12-06 21:10:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:07,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:07,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:07,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910811054] [2021-12-06 21:10:07,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910811054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:07,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:07,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:10:07,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348095854] [2021-12-06 21:10:07,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:07,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:10:07,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:07,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:10:07,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:10:07,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2021-12-06 21:10:07,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 162 transitions, 398 flow. Second operand has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:07,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2021-12-06 21:10:07,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:08,081 INFO L129 PetriNetUnfolder]: 268/1433 cut-off events. [2021-12-06 21:10:08,081 INFO L130 PetriNetUnfolder]: For 426/440 co-relation queries the response was YES. [2021-12-06 21:10:08,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2425 conditions, 1433 events. 268/1433 cut-off events. For 426/440 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 10141 event pairs, 95 based on Foata normal form. 10/1343 useless extension candidates. Maximal degree in co-relation 2416. Up to 263 conditions per place. [2021-12-06 21:10:08,091 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 69 selfloop transitions, 16 changer transitions 1/217 dead transitions. [2021-12-06 21:10:08,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 217 transitions, 802 flow [2021-12-06 21:10:08,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:10:08,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 21:10:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 943 transitions. [2021-12-06 21:10:08,094 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8780260707635009 [2021-12-06 21:10:08,094 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 943 transitions. [2021-12-06 21:10:08,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 943 transitions. [2021-12-06 21:10:08,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:08,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 943 transitions. [2021-12-06 21:10:08,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.16666666666666) internal successors, (943), 6 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,109 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,109 INFO L186 Difference]: Start difference. First operand has 164 places, 162 transitions, 398 flow. Second operand 6 states and 943 transitions. [2021-12-06 21:10:08,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 217 transitions, 802 flow [2021-12-06 21:10:08,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 217 transitions, 802 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 21:10:08,115 INFO L242 Difference]: Finished difference. Result has 173 places, 174 transitions, 553 flow [2021-12-06 21:10:08,115 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=553, PETRI_PLACES=173, PETRI_TRANSITIONS=174} [2021-12-06 21:10:08,116 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 13 predicate places. [2021-12-06 21:10:08,116 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 174 transitions, 553 flow [2021-12-06 21:10:08,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,117 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:08,117 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:08,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 21:10:08,117 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:08,117 INFO L85 PathProgramCache]: Analyzing trace with hash 989028107, now seen corresponding path program 2 times [2021-12-06 21:10:08,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:08,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552857067] [2021-12-06 21:10:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:08,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:08,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:08,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552857067] [2021-12-06 21:10:08,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552857067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:08,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:08,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:10:08,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959126151] [2021-12-06 21:10:08,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:08,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:10:08,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:08,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:10:08,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:10:08,253 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2021-12-06 21:10:08,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 174 transitions, 553 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:08,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2021-12-06 21:10:08,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:08,528 INFO L129 PetriNetUnfolder]: 274/1476 cut-off events. [2021-12-06 21:10:08,528 INFO L130 PetriNetUnfolder]: For 1043/1047 co-relation queries the response was YES. [2021-12-06 21:10:08,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1476 events. 274/1476 cut-off events. For 1043/1047 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 10581 event pairs, 103 based on Foata normal form. 6/1383 useless extension candidates. Maximal degree in co-relation 2811. Up to 292 conditions per place. [2021-12-06 21:10:08,539 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 63 selfloop transitions, 22 changer transitions 1/217 dead transitions. [2021-12-06 21:10:08,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 217 transitions, 945 flow [2021-12-06 21:10:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:10:08,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 21:10:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1076 transitions. [2021-12-06 21:10:08,542 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8587390263367917 [2021-12-06 21:10:08,542 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1076 transitions. [2021-12-06 21:10:08,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1076 transitions. [2021-12-06 21:10:08,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:08,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1076 transitions. [2021-12-06 21:10:08,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,548 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,548 INFO L186 Difference]: Start difference. First operand has 173 places, 174 transitions, 553 flow. Second operand 7 states and 1076 transitions. [2021-12-06 21:10:08,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 217 transitions, 945 flow [2021-12-06 21:10:08,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 217 transitions, 945 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 21:10:08,556 INFO L242 Difference]: Finished difference. Result has 183 places, 179 transitions, 661 flow [2021-12-06 21:10:08,556 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=661, PETRI_PLACES=183, PETRI_TRANSITIONS=179} [2021-12-06 21:10:08,557 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 23 predicate places. [2021-12-06 21:10:08,557 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 179 transitions, 661 flow [2021-12-06 21:10:08,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,558 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:08,558 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:08,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 21:10:08,558 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:08,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:08,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1515646687, now seen corresponding path program 3 times [2021-12-06 21:10:08,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:08,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169837022] [2021-12-06 21:10:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:08,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:08,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:08,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169837022] [2021-12-06 21:10:08,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169837022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:08,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:08,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:10:08,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472279908] [2021-12-06 21:10:08,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:08,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:10:08,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:08,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:10:08,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:10:08,683 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2021-12-06 21:10:08,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 179 transitions, 661 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:08,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2021-12-06 21:10:08,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:09,008 INFO L129 PetriNetUnfolder]: 274/1435 cut-off events. [2021-12-06 21:10:09,009 INFO L130 PetriNetUnfolder]: For 1929/1929 co-relation queries the response was YES. [2021-12-06 21:10:09,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3017 conditions, 1435 events. 274/1435 cut-off events. For 1929/1929 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 10195 event pairs, 105 based on Foata normal form. 3/1339 useless extension candidates. Maximal degree in co-relation 2998. Up to 206 conditions per place. [2021-12-06 21:10:09,019 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 70 selfloop transitions, 29 changer transitions 1/231 dead transitions. [2021-12-06 21:10:09,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 231 transitions, 1152 flow [2021-12-06 21:10:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:10:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 21:10:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1235 transitions. [2021-12-06 21:10:09,023 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8624301675977654 [2021-12-06 21:10:09,023 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1235 transitions. [2021-12-06 21:10:09,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1235 transitions. [2021-12-06 21:10:09,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:09,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1235 transitions. [2021-12-06 21:10:09,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:09,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:09,030 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:09,030 INFO L186 Difference]: Start difference. First operand has 183 places, 179 transitions, 661 flow. Second operand 8 states and 1235 transitions. [2021-12-06 21:10:09,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 231 transitions, 1152 flow [2021-12-06 21:10:09,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 231 transitions, 1102 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-12-06 21:10:09,041 INFO L242 Difference]: Finished difference. Result has 190 places, 187 transitions, 787 flow [2021-12-06 21:10:09,042 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=787, PETRI_PLACES=190, PETRI_TRANSITIONS=187} [2021-12-06 21:10:09,042 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 30 predicate places. [2021-12-06 21:10:09,042 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 187 transitions, 787 flow [2021-12-06 21:10:09,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:09,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:09,043 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:09,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 21:10:09,043 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:09,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:09,044 INFO L85 PathProgramCache]: Analyzing trace with hash 11227386, now seen corresponding path program 1 times [2021-12-06 21:10:09,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:09,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882605472] [2021-12-06 21:10:09,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:09,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:09,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:09,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882605472] [2021-12-06 21:10:09,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882605472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:09,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:09,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 21:10:09,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192014474] [2021-12-06 21:10:09,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:09,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:10:09,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:09,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:10:09,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:10:09,138 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 179 [2021-12-06 21:10:09,139 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 187 transitions, 787 flow. Second operand has 8 states, 8 states have (on average 130.75) internal successors, (1046), 8 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:09,139 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:09,139 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 179 [2021-12-06 21:10:09,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:09,319 INFO L129 PetriNetUnfolder]: 106/1068 cut-off events. [2021-12-06 21:10:09,319 INFO L130 PetriNetUnfolder]: For 971/1011 co-relation queries the response was YES. [2021-12-06 21:10:09,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1838 conditions, 1068 events. 106/1068 cut-off events. For 971/1011 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7362 event pairs, 36 based on Foata normal form. 10/999 useless extension candidates. Maximal degree in co-relation 1817. Up to 144 conditions per place. [2021-12-06 21:10:09,327 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 33 selfloop transitions, 7 changer transitions 0/191 dead transitions. [2021-12-06 21:10:09,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 191 transitions, 875 flow [2021-12-06 21:10:09,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:10:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-06 21:10:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1057 transitions. [2021-12-06 21:10:09,331 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7381284916201117 [2021-12-06 21:10:09,331 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1057 transitions. [2021-12-06 21:10:09,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1057 transitions. [2021-12-06 21:10:09,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:09,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1057 transitions. [2021-12-06 21:10:09,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.125) internal successors, (1057), 8 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:09,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:09,337 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:09,337 INFO L186 Difference]: Start difference. First operand has 190 places, 187 transitions, 787 flow. Second operand 8 states and 1057 transitions. [2021-12-06 21:10:09,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 191 transitions, 875 flow [2021-12-06 21:10:09,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 191 transitions, 846 flow, removed 9 selfloop flow, removed 2 redundant places. [2021-12-06 21:10:09,344 INFO L242 Difference]: Finished difference. Result has 196 places, 188 transitions, 780 flow [2021-12-06 21:10:09,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=780, PETRI_PLACES=196, PETRI_TRANSITIONS=188} [2021-12-06 21:10:09,345 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 36 predicate places. [2021-12-06 21:10:09,346 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 188 transitions, 780 flow [2021-12-06 21:10:09,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.75) internal successors, (1046), 8 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:09,346 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:09,346 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:09,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 21:10:09,347 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:09,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:09,347 INFO L85 PathProgramCache]: Analyzing trace with hash 715964285, now seen corresponding path program 1 times [2021-12-06 21:10:09,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:09,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147168806] [2021-12-06 21:10:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:09,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:09,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:09,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147168806] [2021-12-06 21:10:09,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147168806] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:09,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394235386] [2021-12-06 21:10:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:09,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:09,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:09,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:09,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:10:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:09,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 21:10:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:10,403 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 21:10:10,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-12-06 21:10:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:10,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:10,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:10:10,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2021-12-06 21:10:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:11,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394235386] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:11,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:10:11,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 19] total 38 [2021-12-06 21:10:11,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802167922] [2021-12-06 21:10:11,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:11,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 21:10:11,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:11,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 21:10:11,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 21:10:11,916 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 179 [2021-12-06 21:10:11,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 188 transitions, 780 flow. Second operand has 38 states, 38 states have (on average 79.10526315789474) internal successors, (3006), 38 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:11,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:11,920 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 179 [2021-12-06 21:10:11,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:17,876 INFO L129 PetriNetUnfolder]: 6079/13224 cut-off events. [2021-12-06 21:10:17,876 INFO L130 PetriNetUnfolder]: For 19143/19143 co-relation queries the response was YES. [2021-12-06 21:10:17,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31644 conditions, 13224 events. 6079/13224 cut-off events. For 19143/19143 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 120569 event pairs, 801 based on Foata normal form. 9/12603 useless extension candidates. Maximal degree in co-relation 31621. Up to 2849 conditions per place. [2021-12-06 21:10:17,970 INFO L132 encePairwiseOnDemand]: 133/179 looper letters, 512 selfloop transitions, 105 changer transitions 283/964 dead transitions. [2021-12-06 21:10:17,970 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 964 transitions, 5535 flow [2021-12-06 21:10:17,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-06 21:10:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-12-06 21:10:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 7546 transitions. [2021-12-06 21:10:17,987 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46325741297808337 [2021-12-06 21:10:17,988 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 7546 transitions. [2021-12-06 21:10:17,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 7546 transitions. [2021-12-06 21:10:17,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:17,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 7546 transitions. [2021-12-06 21:10:18,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 82.92307692307692) internal successors, (7546), 91 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:18,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 179.0) internal successors, (16468), 92 states have internal predecessors, (16468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:18,032 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 179.0) internal successors, (16468), 92 states have internal predecessors, (16468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:18,032 INFO L186 Difference]: Start difference. First operand has 196 places, 188 transitions, 780 flow. Second operand 91 states and 7546 transitions. [2021-12-06 21:10:18,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 964 transitions, 5535 flow [2021-12-06 21:10:18,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 964 transitions, 5523 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-06 21:10:18,110 INFO L242 Difference]: Finished difference. Result has 340 places, 271 transitions, 1628 flow [2021-12-06 21:10:18,111 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=1628, PETRI_PLACES=340, PETRI_TRANSITIONS=271} [2021-12-06 21:10:18,111 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 180 predicate places. [2021-12-06 21:10:18,111 INFO L470 AbstractCegarLoop]: Abstraction has has 340 places, 271 transitions, 1628 flow [2021-12-06 21:10:18,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 79.10526315789474) internal successors, (3006), 38 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:18,112 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:18,113 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:18,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:18,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:18,314 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1840390791, now seen corresponding path program 1 times [2021-12-06 21:10:18,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:18,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430917897] [2021-12-06 21:10:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:18,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:18,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:18,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430917897] [2021-12-06 21:10:18,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430917897] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:18,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924199384] [2021-12-06 21:10:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:18,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:18,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:18,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:18,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:10:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 21:10:18,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:18,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:10:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:18,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:18,994 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 21:10:18,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 21:10:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:10:19,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924199384] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:19,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:19,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2021-12-06 21:10:19,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430912370] [2021-12-06 21:10:19,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:19,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 21:10:19,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:19,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 21:10:19,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:10:19,107 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2021-12-06 21:10:19,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 271 transitions, 1628 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:19,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:19,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2021-12-06 21:10:19,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:20,191 INFO L129 PetriNetUnfolder]: 1832/5824 cut-off events. [2021-12-06 21:10:20,191 INFO L130 PetriNetUnfolder]: For 16481/16703 co-relation queries the response was YES. [2021-12-06 21:10:20,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16849 conditions, 5824 events. 1832/5824 cut-off events. For 16481/16703 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 53801 event pairs, 339 based on Foata normal form. 32/5651 useless extension candidates. Maximal degree in co-relation 16766. Up to 1102 conditions per place. [2021-12-06 21:10:20,254 INFO L132 encePairwiseOnDemand]: 166/179 looper letters, 117 selfloop transitions, 68 changer transitions 7/382 dead transitions. [2021-12-06 21:10:20,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 382 transitions, 2426 flow [2021-12-06 21:10:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 21:10:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-06 21:10:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2514 transitions. [2021-12-06 21:10:20,257 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7022346368715083 [2021-12-06 21:10:20,257 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2514 transitions. [2021-12-06 21:10:20,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2514 transitions. [2021-12-06 21:10:20,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:20,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2514 transitions. [2021-12-06 21:10:20,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 125.7) internal successors, (2514), 20 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:20,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:20,265 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:20,265 INFO L186 Difference]: Start difference. First operand has 340 places, 271 transitions, 1628 flow. Second operand 20 states and 2514 transitions. [2021-12-06 21:10:20,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 382 transitions, 2426 flow [2021-12-06 21:10:20,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 382 transitions, 2202 flow, removed 89 selfloop flow, removed 35 redundant places. [2021-12-06 21:10:20,334 INFO L242 Difference]: Finished difference. Result has 286 places, 317 transitions, 1848 flow [2021-12-06 21:10:20,335 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1848, PETRI_PLACES=286, PETRI_TRANSITIONS=317} [2021-12-06 21:10:20,335 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 126 predicate places. [2021-12-06 21:10:20,335 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 317 transitions, 1848 flow [2021-12-06 21:10:20,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:20,336 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:20,336 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:20,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:10:20,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:20,537 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:20,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:20,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1978318625, now seen corresponding path program 2 times [2021-12-06 21:10:20,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:20,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496256447] [2021-12-06 21:10:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:20,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:20,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:20,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496256447] [2021-12-06 21:10:20,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496256447] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:20,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032715944] [2021-12-06 21:10:20,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:10:20,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:20,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:20,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:20,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:10:20,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:10:20,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:20,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 21:10:20,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:21,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:10:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:21,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:21,134 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 21:10:21,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 21:10:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:10:21,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032715944] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:21,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:21,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2021-12-06 21:10:21,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629945162] [2021-12-06 21:10:21,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:21,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 21:10:21,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:21,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 21:10:21,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:10:21,235 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2021-12-06 21:10:21,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 317 transitions, 1848 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:21,236 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:21,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2021-12-06 21:10:21,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:22,257 INFO L129 PetriNetUnfolder]: 1915/6204 cut-off events. [2021-12-06 21:10:22,257 INFO L130 PetriNetUnfolder]: For 10755/10930 co-relation queries the response was YES. [2021-12-06 21:10:22,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17884 conditions, 6204 events. 1915/6204 cut-off events. For 10755/10930 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 58644 event pairs, 407 based on Foata normal form. 53/6026 useless extension candidates. Maximal degree in co-relation 17819. Up to 1383 conditions per place. [2021-12-06 21:10:22,320 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 138 selfloop transitions, 63 changer transitions 4/395 dead transitions. [2021-12-06 21:10:22,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 395 transitions, 2591 flow [2021-12-06 21:10:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:10:22,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-06 21:10:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1899 transitions. [2021-12-06 21:10:22,323 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7072625698324022 [2021-12-06 21:10:22,323 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1899 transitions. [2021-12-06 21:10:22,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1899 transitions. [2021-12-06 21:10:22,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:22,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1899 transitions. [2021-12-06 21:10:22,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.6) internal successors, (1899), 15 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:22,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:22,329 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:22,329 INFO L186 Difference]: Start difference. First operand has 286 places, 317 transitions, 1848 flow. Second operand 15 states and 1899 transitions. [2021-12-06 21:10:22,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 395 transitions, 2591 flow [2021-12-06 21:10:22,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 395 transitions, 2561 flow, removed 15 selfloop flow, removed 2 redundant places. [2021-12-06 21:10:22,387 INFO L242 Difference]: Finished difference. Result has 305 places, 340 transitions, 2171 flow [2021-12-06 21:10:22,388 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2171, PETRI_PLACES=305, PETRI_TRANSITIONS=340} [2021-12-06 21:10:22,388 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 145 predicate places. [2021-12-06 21:10:22,388 INFO L470 AbstractCegarLoop]: Abstraction has has 305 places, 340 transitions, 2171 flow [2021-12-06 21:10:22,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:22,389 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:22,389 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:22,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:10:22,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 21:10:22,590 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:22,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:22,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1358415567, now seen corresponding path program 3 times [2021-12-06 21:10:22,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:22,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498878337] [2021-12-06 21:10:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:22,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:22,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:22,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498878337] [2021-12-06 21:10:22,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498878337] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:22,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483556423] [2021-12-06 21:10:22,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:10:22,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:22,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:22,802 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:22,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:10:22,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 21:10:22,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:22,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 21:10:22,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:23,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:10:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:23,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:23,328 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 21:10:23,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 21:10:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:10:23,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483556423] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:23,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:23,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 17 [2021-12-06 21:10:23,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263874410] [2021-12-06 21:10:23,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:23,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 21:10:23,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:23,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 21:10:23,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:10:23,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2021-12-06 21:10:23,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 340 transitions, 2171 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:23,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:23,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2021-12-06 21:10:23,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:24,588 INFO L129 PetriNetUnfolder]: 2086/6884 cut-off events. [2021-12-06 21:10:24,588 INFO L130 PetriNetUnfolder]: For 14550/14754 co-relation queries the response was YES. [2021-12-06 21:10:24,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21253 conditions, 6884 events. 2086/6884 cut-off events. For 14550/14754 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 67564 event pairs, 335 based on Foata normal form. 45/6685 useless extension candidates. Maximal degree in co-relation 21180. Up to 1297 conditions per place. [2021-12-06 21:10:24,657 INFO L132 encePairwiseOnDemand]: 166/179 looper letters, 156 selfloop transitions, 79 changer transitions 9/434 dead transitions. [2021-12-06 21:10:24,657 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 434 transitions, 3115 flow [2021-12-06 21:10:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:10:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-06 21:10:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1926 transitions. [2021-12-06 21:10:24,660 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.71731843575419 [2021-12-06 21:10:24,660 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1926 transitions. [2021-12-06 21:10:24,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1926 transitions. [2021-12-06 21:10:24,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:24,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1926 transitions. [2021-12-06 21:10:24,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.4) internal successors, (1926), 15 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:24,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:24,667 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:24,667 INFO L186 Difference]: Start difference. First operand has 305 places, 340 transitions, 2171 flow. Second operand 15 states and 1926 transitions. [2021-12-06 21:10:24,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 434 transitions, 3115 flow [2021-12-06 21:10:24,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 434 transitions, 3071 flow, removed 22 selfloop flow, removed 2 redundant places. [2021-12-06 21:10:24,771 INFO L242 Difference]: Finished difference. Result has 323 places, 359 transitions, 2537 flow [2021-12-06 21:10:24,771 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2537, PETRI_PLACES=323, PETRI_TRANSITIONS=359} [2021-12-06 21:10:24,772 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 163 predicate places. [2021-12-06 21:10:24,772 INFO L470 AbstractCegarLoop]: Abstraction has has 323 places, 359 transitions, 2537 flow [2021-12-06 21:10:24,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:24,772 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:24,772 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:24,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:24,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 21:10:24,973 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:24,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:24,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1788832759, now seen corresponding path program 4 times [2021-12-06 21:10:24,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:24,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852434647] [2021-12-06 21:10:24,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:24,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:25,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:25,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852434647] [2021-12-06 21:10:25,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852434647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:25,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648112000] [2021-12-06 21:10:25,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:10:25,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:25,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:25,126 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:25,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:10:25,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:10:25,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:25,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 21:10:25,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:25,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:10:25,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:10:25,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:10:25,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:10:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:25,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:26,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:10:26,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2021-12-06 21:10:26,094 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 21:10:26,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 173 [2021-12-06 21:10:26,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:10:26,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 59 [2021-12-06 21:10:26,106 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 21:10:26,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 94 [2021-12-06 21:10:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:26,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648112000] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:26,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:10:26,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 31 [2021-12-06 21:10:26,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569663473] [2021-12-06 21:10:26,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:26,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 21:10:26,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:26,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 21:10:26,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=676, Unknown=44, NotChecked=0, Total=930 [2021-12-06 21:10:26,218 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 179 [2021-12-06 21:10:26,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 359 transitions, 2537 flow. Second operand has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:26,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:26,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 179 [2021-12-06 21:10:26,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:27,860 INFO L129 PetriNetUnfolder]: 2143/7136 cut-off events. [2021-12-06 21:10:27,861 INFO L130 PetriNetUnfolder]: For 20644/20860 co-relation queries the response was YES. [2021-12-06 21:10:27,910 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23603 conditions, 7136 events. 2143/7136 cut-off events. For 20644/20860 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 70749 event pairs, 368 based on Foata normal form. 53/6922 useless extension candidates. Maximal degree in co-relation 23523. Up to 1611 conditions per place. [2021-12-06 21:10:27,929 INFO L132 encePairwiseOnDemand]: 155/179 looper letters, 173 selfloop transitions, 97 changer transitions 4/442 dead transitions. [2021-12-06 21:10:27,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 442 transitions, 3584 flow [2021-12-06 21:10:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 21:10:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-06 21:10:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2971 transitions. [2021-12-06 21:10:27,932 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5723367366596032 [2021-12-06 21:10:27,932 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2971 transitions. [2021-12-06 21:10:27,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2971 transitions. [2021-12-06 21:10:27,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:27,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2971 transitions. [2021-12-06 21:10:27,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 102.44827586206897) internal successors, (2971), 29 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:27,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 179.0) internal successors, (5370), 30 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:27,940 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 179.0) internal successors, (5370), 30 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:27,940 INFO L186 Difference]: Start difference. First operand has 323 places, 359 transitions, 2537 flow. Second operand 29 states and 2971 transitions. [2021-12-06 21:10:27,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 442 transitions, 3584 flow [2021-12-06 21:10:28,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 442 transitions, 3420 flow, removed 43 selfloop flow, removed 6 redundant places. [2021-12-06 21:10:28,031 INFO L242 Difference]: Finished difference. Result has 353 places, 380 transitions, 2910 flow [2021-12-06 21:10:28,032 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2910, PETRI_PLACES=353, PETRI_TRANSITIONS=380} [2021-12-06 21:10:28,032 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 193 predicate places. [2021-12-06 21:10:28,033 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 380 transitions, 2910 flow [2021-12-06 21:10:28,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:28,033 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:28,033 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:28,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 21:10:28,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:28,235 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:28,236 INFO L85 PathProgramCache]: Analyzing trace with hash -813689031, now seen corresponding path program 5 times [2021-12-06 21:10:28,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:28,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63391177] [2021-12-06 21:10:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:28,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:28,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:28,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63391177] [2021-12-06 21:10:28,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63391177] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:28,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557637171] [2021-12-06 21:10:28,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:10:28,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:28,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:28,403 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:28,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:10:28,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:10:28,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 21:10:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:28,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:10:28,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:10:28,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:10:28,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:10:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:28,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:29,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:10:29,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2021-12-06 21:10:29,237 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 21:10:29,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 173 [2021-12-06 21:10:29,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:10:29,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 59 [2021-12-06 21:10:29,247 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 21:10:29,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 94 [2021-12-06 21:10:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:29,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557637171] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:29,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:10:29,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 32 [2021-12-06 21:10:29,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058366091] [2021-12-06 21:10:29,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:29,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 21:10:29,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:29,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 21:10:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=728, Unknown=49, NotChecked=0, Total=992 [2021-12-06 21:10:29,338 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 179 [2021-12-06 21:10:29,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 380 transitions, 2910 flow. Second operand has 32 states, 32 states have (on average 101.0625) internal successors, (3234), 32 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:29,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:29,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 179 [2021-12-06 21:10:29,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:31,117 INFO L129 PetriNetUnfolder]: 2191/7494 cut-off events. [2021-12-06 21:10:31,117 INFO L130 PetriNetUnfolder]: For 25502/25842 co-relation queries the response was YES. [2021-12-06 21:10:31,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25725 conditions, 7494 events. 2191/7494 cut-off events. For 25502/25842 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 75930 event pairs, 444 based on Foata normal form. 90/7296 useless extension candidates. Maximal degree in co-relation 25636. Up to 1946 conditions per place. [2021-12-06 21:10:31,207 INFO L132 encePairwiseOnDemand]: 156/179 looper letters, 190 selfloop transitions, 76 changer transitions 4/438 dead transitions. [2021-12-06 21:10:31,207 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 438 transitions, 3767 flow [2021-12-06 21:10:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 21:10:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-06 21:10:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2365 transitions. [2021-12-06 21:10:31,210 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5744474131649259 [2021-12-06 21:10:31,210 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2365 transitions. [2021-12-06 21:10:31,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2365 transitions. [2021-12-06 21:10:31,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:31,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2365 transitions. [2021-12-06 21:10:31,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 102.82608695652173) internal successors, (2365), 23 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:31,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:31,218 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:31,219 INFO L186 Difference]: Start difference. First operand has 353 places, 380 transitions, 2910 flow. Second operand 23 states and 2365 transitions. [2021-12-06 21:10:31,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 438 transitions, 3767 flow [2021-12-06 21:10:31,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 438 transitions, 3641 flow, removed 52 selfloop flow, removed 12 redundant places. [2021-12-06 21:10:31,358 INFO L242 Difference]: Finished difference. Result has 366 places, 389 transitions, 3068 flow [2021-12-06 21:10:31,358 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3068, PETRI_PLACES=366, PETRI_TRANSITIONS=389} [2021-12-06 21:10:31,359 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 206 predicate places. [2021-12-06 21:10:31,359 INFO L470 AbstractCegarLoop]: Abstraction has has 366 places, 389 transitions, 3068 flow [2021-12-06 21:10:31,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 101.0625) internal successors, (3234), 32 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:31,360 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:31,360 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:31,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:31,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:31,561 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:31,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:31,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1628726643, now seen corresponding path program 6 times [2021-12-06 21:10:31,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:31,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802673808] [2021-12-06 21:10:31,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:31,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:31,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:31,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802673808] [2021-12-06 21:10:31,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802673808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:31,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863272507] [2021-12-06 21:10:31,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 21:10:31,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:31,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:31,734 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:31,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 21:10:31,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-06 21:10:31,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:31,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 21:10:31,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:32,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:10:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:32,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:32,199 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 21:10:32,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 21:10:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:10:32,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863272507] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:32,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:32,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2021-12-06 21:10:32,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784702693] [2021-12-06 21:10:32,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:32,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 21:10:32,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:32,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 21:10:32,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:10:32,289 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2021-12-06 21:10:32,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 389 transitions, 3068 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:32,290 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:32,291 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2021-12-06 21:10:32,291 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:33,832 INFO L129 PetriNetUnfolder]: 2215/7563 cut-off events. [2021-12-06 21:10:33,832 INFO L130 PetriNetUnfolder]: For 29137/29470 co-relation queries the response was YES. [2021-12-06 21:10:33,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26670 conditions, 7563 events. 2215/7563 cut-off events. For 29137/29470 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 76905 event pairs, 459 based on Foata normal form. 90/7355 useless extension candidates. Maximal degree in co-relation 26577. Up to 1935 conditions per place. [2021-12-06 21:10:33,920 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 176 selfloop transitions, 73 changer transitions 4/443 dead transitions. [2021-12-06 21:10:33,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 443 transitions, 3848 flow [2021-12-06 21:10:33,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 21:10:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 21:10:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2250 transitions. [2021-12-06 21:10:33,922 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6983240223463687 [2021-12-06 21:10:33,923 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2250 transitions. [2021-12-06 21:10:33,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2250 transitions. [2021-12-06 21:10:33,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:33,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2250 transitions. [2021-12-06 21:10:33,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 125.0) internal successors, (2250), 18 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:33,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:33,928 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:33,928 INFO L186 Difference]: Start difference. First operand has 366 places, 389 transitions, 3068 flow. Second operand 18 states and 2250 transitions. [2021-12-06 21:10:33,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 443 transitions, 3848 flow [2021-12-06 21:10:34,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 443 transitions, 3719 flow, removed 19 selfloop flow, removed 15 redundant places. [2021-12-06 21:10:34,060 INFO L242 Difference]: Finished difference. Result has 369 places, 393 transitions, 3154 flow [2021-12-06 21:10:34,060 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3154, PETRI_PLACES=369, PETRI_TRANSITIONS=393} [2021-12-06 21:10:34,061 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 209 predicate places. [2021-12-06 21:10:34,061 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 393 transitions, 3154 flow [2021-12-06 21:10:34,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:34,061 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:34,061 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:34,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:34,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 21:10:34,263 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:34,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:34,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1542285585, now seen corresponding path program 7 times [2021-12-06 21:10:34,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:34,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457790873] [2021-12-06 21:10:34,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:34,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:34,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:34,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457790873] [2021-12-06 21:10:34,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457790873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:34,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401812520] [2021-12-06 21:10:34,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 21:10:34,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:34,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:34,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:34,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 21:10:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:34,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 21:10:34,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:34,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:10:34,635 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:10:34,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 21:10:34,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 21:10:34,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:10:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:34,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:34,941 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_272 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_272) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)) is different from false [2021-12-06 21:10:34,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:10:34,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2021-12-06 21:10:34,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 21:10:35,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 21:10:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:35,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401812520] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:35,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:10:35,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 26 [2021-12-06 21:10:35,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795062045] [2021-12-06 21:10:35,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:35,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 21:10:35,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:35,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 21:10:35,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=519, Unknown=1, NotChecked=46, Total=650 [2021-12-06 21:10:35,422 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 179 [2021-12-06 21:10:35,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 393 transitions, 3154 flow. Second operand has 26 states, 26 states have (on average 104.46153846153847) internal successors, (2716), 26 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:35,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:35,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 179 [2021-12-06 21:10:35,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:37,399 INFO L129 PetriNetUnfolder]: 2445/8425 cut-off events. [2021-12-06 21:10:37,399 INFO L130 PetriNetUnfolder]: For 33858/34098 co-relation queries the response was YES. [2021-12-06 21:10:37,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29776 conditions, 8425 events. 2445/8425 cut-off events. For 33858/34098 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 88381 event pairs, 420 based on Foata normal form. 60/8171 useless extension candidates. Maximal degree in co-relation 29682. Up to 1538 conditions per place. [2021-12-06 21:10:37,490 INFO L132 encePairwiseOnDemand]: 158/179 looper letters, 204 selfloop transitions, 137 changer transitions 13/530 dead transitions. [2021-12-06 21:10:37,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 530 transitions, 4858 flow [2021-12-06 21:10:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 21:10:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-06 21:10:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3329 transitions. [2021-12-06 21:10:37,494 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5999279149396287 [2021-12-06 21:10:37,494 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3329 transitions. [2021-12-06 21:10:37,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3329 transitions. [2021-12-06 21:10:37,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:37,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3329 transitions. [2021-12-06 21:10:37,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 107.38709677419355) internal successors, (3329), 31 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:37,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:37,502 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:37,502 INFO L186 Difference]: Start difference. First operand has 369 places, 393 transitions, 3154 flow. Second operand 31 states and 3329 transitions. [2021-12-06 21:10:37,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 530 transitions, 4858 flow [2021-12-06 21:10:37,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 530 transitions, 4629 flow, removed 35 selfloop flow, removed 14 redundant places. [2021-12-06 21:10:37,644 INFO L242 Difference]: Finished difference. Result has 395 places, 434 transitions, 3901 flow [2021-12-06 21:10:37,644 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3901, PETRI_PLACES=395, PETRI_TRANSITIONS=434} [2021-12-06 21:10:37,645 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 235 predicate places. [2021-12-06 21:10:37,645 INFO L470 AbstractCegarLoop]: Abstraction has has 395 places, 434 transitions, 3901 flow [2021-12-06 21:10:37,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.46153846153847) internal successors, (2716), 26 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:37,645 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:37,645 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:37,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 21:10:37,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 21:10:37,847 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:37,848 INFO L85 PathProgramCache]: Analyzing trace with hash 623556553, now seen corresponding path program 8 times [2021-12-06 21:10:37,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:37,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404869503] [2021-12-06 21:10:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:37,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:38,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:38,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404869503] [2021-12-06 21:10:38,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404869503] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:38,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581456841] [2021-12-06 21:10:38,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:10:38,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:38,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:38,062 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:38,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 21:10:38,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:10:38,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:38,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 21:10:38,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:38,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:38,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:10:38,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:10:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:38,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:38,641 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_297 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_297) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)) c_~x1~0)) is different from false [2021-12-06 21:10:38,654 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_297 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_297) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)) is different from false [2021-12-06 21:10:38,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:10:38,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2021-12-06 21:10:38,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 21:10:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:38,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581456841] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:38,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:10:38,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 34 [2021-12-06 21:10:38,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357726335] [2021-12-06 21:10:38,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:38,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 21:10:38,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:38,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 21:10:38,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=870, Unknown=2, NotChecked=122, Total=1122 [2021-12-06 21:10:38,946 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 179 [2021-12-06 21:10:38,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 434 transitions, 3901 flow. Second operand has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:38,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:38,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 179 [2021-12-06 21:10:38,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:41,749 INFO L129 PetriNetUnfolder]: 2875/9952 cut-off events. [2021-12-06 21:10:41,749 INFO L130 PetriNetUnfolder]: For 60957/61318 co-relation queries the response was YES. [2021-12-06 21:10:41,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38004 conditions, 9952 events. 2875/9952 cut-off events. For 60957/61318 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 108647 event pairs, 496 based on Foata normal form. 71/9622 useless extension candidates. Maximal degree in co-relation 37900. Up to 2035 conditions per place. [2021-12-06 21:10:41,860 INFO L132 encePairwiseOnDemand]: 152/179 looper letters, 220 selfloop transitions, 167 changer transitions 6/568 dead transitions. [2021-12-06 21:10:41,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 568 transitions, 6159 flow [2021-12-06 21:10:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 21:10:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-06 21:10:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2466 transitions. [2021-12-06 21:10:41,863 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.598979839689094 [2021-12-06 21:10:41,863 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2466 transitions. [2021-12-06 21:10:41,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2466 transitions. [2021-12-06 21:10:41,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:41,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2466 transitions. [2021-12-06 21:10:41,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 107.21739130434783) internal successors, (2466), 23 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:41,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:41,869 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:41,869 INFO L186 Difference]: Start difference. First operand has 395 places, 434 transitions, 3901 flow. Second operand 23 states and 2466 transitions. [2021-12-06 21:10:41,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 568 transitions, 6159 flow [2021-12-06 21:10:42,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 568 transitions, 5374 flow, removed 340 selfloop flow, removed 15 redundant places. [2021-12-06 21:10:42,159 INFO L242 Difference]: Finished difference. Result has 408 places, 504 transitions, 4784 flow [2021-12-06 21:10:42,160 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3479, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4784, PETRI_PLACES=408, PETRI_TRANSITIONS=504} [2021-12-06 21:10:42,160 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 248 predicate places. [2021-12-06 21:10:42,160 INFO L470 AbstractCegarLoop]: Abstraction has has 408 places, 504 transitions, 4784 flow [2021-12-06 21:10:42,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:42,161 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:42,161 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:42,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 21:10:42,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 21:10:42,362 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:42,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1803001111, now seen corresponding path program 9 times [2021-12-06 21:10:42,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:42,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384175838] [2021-12-06 21:10:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:42,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:42,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:42,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384175838] [2021-12-06 21:10:42,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384175838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:42,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246631815] [2021-12-06 21:10:42,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:10:42,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:42,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:42,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:42,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 21:10:42,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 21:10:42,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:42,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 21:10:42,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:42,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:42,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:10:42,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:10:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:43,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:43,053 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_322 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_322) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)) is different from false [2021-12-06 21:10:43,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:10:43,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2021-12-06 21:10:43,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 21:10:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:10:43,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246631815] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:43,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:10:43,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 32 [2021-12-06 21:10:43,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577658649] [2021-12-06 21:10:43,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:43,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 21:10:43,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:43,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 21:10:43,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=810, Unknown=1, NotChecked=58, Total=992 [2021-12-06 21:10:43,307 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 179 [2021-12-06 21:10:43,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 504 transitions, 4784 flow. Second operand has 32 states, 32 states have (on average 103.625) internal successors, (3316), 32 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:43,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:43,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 179 [2021-12-06 21:10:43,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:45,837 INFO L129 PetriNetUnfolder]: 2926/10345 cut-off events. [2021-12-06 21:10:45,838 INFO L130 PetriNetUnfolder]: For 76961/77630 co-relation queries the response was YES. [2021-12-06 21:10:45,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44506 conditions, 10345 events. 2926/10345 cut-off events. For 76961/77630 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 114774 event pairs, 675 based on Foata normal form. 85/9980 useless extension candidates. Maximal degree in co-relation 44395. Up to 2990 conditions per place. [2021-12-06 21:10:45,973 INFO L132 encePairwiseOnDemand]: 154/179 looper letters, 298 selfloop transitions, 124 changer transitions 4/601 dead transitions. [2021-12-06 21:10:45,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 601 transitions, 6648 flow [2021-12-06 21:10:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 21:10:45,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-06 21:10:45,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2451 transitions. [2021-12-06 21:10:45,975 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5953364100072869 [2021-12-06 21:10:45,975 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2451 transitions. [2021-12-06 21:10:45,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2451 transitions. [2021-12-06 21:10:45,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:45,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2451 transitions. [2021-12-06 21:10:45,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 106.56521739130434) internal successors, (2451), 23 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:45,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:45,981 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:45,981 INFO L186 Difference]: Start difference. First operand has 408 places, 504 transitions, 4784 flow. Second operand 23 states and 2451 transitions. [2021-12-06 21:10:45,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 601 transitions, 6648 flow [2021-12-06 21:10:46,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 601 transitions, 6393 flow, removed 84 selfloop flow, removed 12 redundant places. [2021-12-06 21:10:46,318 INFO L242 Difference]: Finished difference. Result has 425 places, 543 transitions, 5470 flow [2021-12-06 21:10:46,318 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=4544, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5470, PETRI_PLACES=425, PETRI_TRANSITIONS=543} [2021-12-06 21:10:46,319 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 265 predicate places. [2021-12-06 21:10:46,319 INFO L470 AbstractCegarLoop]: Abstraction has has 425 places, 543 transitions, 5470 flow [2021-12-06 21:10:46,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 103.625) internal successors, (3316), 32 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:46,319 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:46,319 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:46,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:46,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 21:10:46,521 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:46,522 INFO L85 PathProgramCache]: Analyzing trace with hash 598545018, now seen corresponding path program 2 times [2021-12-06 21:10:46,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:46,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323161269] [2021-12-06 21:10:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:46,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:10:46,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:46,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323161269] [2021-12-06 21:10:46,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323161269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:46,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315789334] [2021-12-06 21:10:46,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:10:46,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:46,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:46,713 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:46,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 21:10:46,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:10:46,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:46,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 21:10:46,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:10:47,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:10:47,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315789334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:47,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:10:47,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 18 [2021-12-06 21:10:47,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759430311] [2021-12-06 21:10:47,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:47,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 21:10:47,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:47,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 21:10:47,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-12-06 21:10:47,689 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-12-06 21:10:47,691 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 543 transitions, 5470 flow. Second operand has 18 states, 18 states have (on average 144.83333333333334) internal successors, (2607), 18 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:47,691 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:47,691 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-12-06 21:10:47,691 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:50,391 INFO L129 PetriNetUnfolder]: 2298/8925 cut-off events. [2021-12-06 21:10:50,391 INFO L130 PetriNetUnfolder]: For 46817/47176 co-relation queries the response was YES. [2021-12-06 21:10:50,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34710 conditions, 8925 events. 2298/8925 cut-off events. For 46817/47176 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 97791 event pairs, 748 based on Foata normal form. 101/8396 useless extension candidates. Maximal degree in co-relation 34591. Up to 1000 conditions per place. [2021-12-06 21:10:50,514 INFO L132 encePairwiseOnDemand]: 166/179 looper letters, 129 selfloop transitions, 62 changer transitions 1/652 dead transitions. [2021-12-06 21:10:50,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 652 transitions, 6659 flow [2021-12-06 21:10:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 21:10:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-06 21:10:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3258 transitions. [2021-12-06 21:10:50,518 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273235144743525 [2021-12-06 21:10:50,518 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3258 transitions. [2021-12-06 21:10:50,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3258 transitions. [2021-12-06 21:10:50,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:10:50,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3258 transitions. [2021-12-06 21:10:50,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 148.0909090909091) internal successors, (3258), 22 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:50,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 179.0) internal successors, (4117), 23 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:50,527 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 179.0) internal successors, (4117), 23 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:50,527 INFO L186 Difference]: Start difference. First operand has 425 places, 543 transitions, 5470 flow. Second operand 22 states and 3258 transitions. [2021-12-06 21:10:50,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 652 transitions, 6659 flow [2021-12-06 21:10:50,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 652 transitions, 6461 flow, removed 77 selfloop flow, removed 12 redundant places. [2021-12-06 21:10:50,798 INFO L242 Difference]: Finished difference. Result has 440 places, 576 transitions, 5809 flow [2021-12-06 21:10:50,798 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=5272, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5809, PETRI_PLACES=440, PETRI_TRANSITIONS=576} [2021-12-06 21:10:50,799 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 280 predicate places. [2021-12-06 21:10:50,799 INFO L470 AbstractCegarLoop]: Abstraction has has 440 places, 576 transitions, 5809 flow [2021-12-06 21:10:50,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 144.83333333333334) internal successors, (2607), 18 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:50,799 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:10:50,799 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:50,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 21:10:51,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 21:10:51,001 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:10:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1795487122, now seen corresponding path program 3 times [2021-12-06 21:10:51,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:51,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101395066] [2021-12-06 21:10:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:51,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:10:51,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:51,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101395066] [2021-12-06 21:10:51,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101395066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:51,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541136967] [2021-12-06 21:10:51,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:10:51,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:51,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:51,148 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:51,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 21:10:51,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 21:10:51,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:51,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 21:10:51,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:10:51,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:10:51,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541136967] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:51,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:10:51,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-06 21:10:51,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717977644] [2021-12-06 21:10:51,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:51,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 21:10:51,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:51,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 21:10:51,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-12-06 21:10:51,906 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-12-06 21:10:51,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 576 transitions, 5809 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:51,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:10:51,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-12-06 21:10:51,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:10:59,926 INFO L129 PetriNetUnfolder]: 4294/17295 cut-off events. [2021-12-06 21:10:59,926 INFO L130 PetriNetUnfolder]: For 103260/103886 co-relation queries the response was YES. [2021-12-06 21:11:00,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70431 conditions, 17295 events. 4294/17295 cut-off events. For 103260/103886 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 214447 event pairs, 1176 based on Foata normal form. 154/16239 useless extension candidates. Maximal degree in co-relation 70306. Up to 1781 conditions per place. [2021-12-06 21:11:00,312 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 228 selfloop transitions, 273 changer transitions 0/961 dead transitions. [2021-12-06 21:11:00,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 961 transitions, 9919 flow [2021-12-06 21:11:00,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 21:11:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-12-06 21:11:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 10366 transitions. [2021-12-06 21:11:00,323 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8272944932162809 [2021-12-06 21:11:00,323 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 10366 transitions. [2021-12-06 21:11:00,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 10366 transitions. [2021-12-06 21:11:00,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:11:00,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 10366 transitions. [2021-12-06 21:11:00,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 148.0857142857143) internal successors, (10366), 70 states have internal predecessors, (10366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:00,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 179.0) internal successors, (12709), 71 states have internal predecessors, (12709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:00,351 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 179.0) internal successors, (12709), 71 states have internal predecessors, (12709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:00,351 INFO L186 Difference]: Start difference. First operand has 440 places, 576 transitions, 5809 flow. Second operand 70 states and 10366 transitions. [2021-12-06 21:11:00,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 961 transitions, 9919 flow [2021-12-06 21:11:01,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 961 transitions, 9617 flow, removed 124 selfloop flow, removed 2 redundant places. [2021-12-06 21:11:01,082 INFO L242 Difference]: Finished difference. Result has 533 places, 806 transitions, 8672 flow [2021-12-06 21:11:01,083 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=8672, PETRI_PLACES=533, PETRI_TRANSITIONS=806} [2021-12-06 21:11:01,083 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 373 predicate places. [2021-12-06 21:11:01,083 INFO L470 AbstractCegarLoop]: Abstraction has has 533 places, 806 transitions, 8672 flow [2021-12-06 21:11:01,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:01,084 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:11:01,084 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:11:01,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 21:11:01,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:01,285 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:11:01,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:01,286 INFO L85 PathProgramCache]: Analyzing trace with hash -474649438, now seen corresponding path program 4 times [2021-12-06 21:11:01,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:11:01,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323689589] [2021-12-06 21:11:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:01,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:11:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:01,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:11:01,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323689589] [2021-12-06 21:11:01,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323689589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:11:01,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941964816] [2021-12-06 21:11:01,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:11:01,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:01,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:11:01,445 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:11:01,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 21:11:01,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:11:01,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:11:01,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 21:11:01,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:01,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:11:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:02,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941964816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:11:02,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:11:02,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-06 21:11:02,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515569848] [2021-12-06 21:11:02,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:11:02,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 21:11:02,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:11:02,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 21:11:02,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-12-06 21:11:02,284 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-12-06 21:11:02,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 806 transitions, 8672 flow. Second operand has 25 states, 25 states have (on average 144.64) internal successors, (3616), 25 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:02,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:11:02,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-12-06 21:11:02,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:11:09,103 INFO L129 PetriNetUnfolder]: 5445/22340 cut-off events. [2021-12-06 21:11:09,103 INFO L130 PetriNetUnfolder]: For 165661/166449 co-relation queries the response was YES. [2021-12-06 21:11:09,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97059 conditions, 22340 events. 5445/22340 cut-off events. For 165661/166449 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 291372 event pairs, 1614 based on Foata normal form. 203/21006 useless extension candidates. Maximal degree in co-relation 96910. Up to 2237 conditions per place. [2021-12-06 21:11:09,613 INFO L132 encePairwiseOnDemand]: 163/179 looper letters, 271 selfloop transitions, 390 changer transitions 0/1121 dead transitions. [2021-12-06 21:11:09,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 1121 transitions, 13713 flow [2021-12-06 21:11:09,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 21:11:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-06 21:11:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5835 transitions. [2021-12-06 21:11:09,619 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8358401375161152 [2021-12-06 21:11:09,619 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5835 transitions. [2021-12-06 21:11:09,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5835 transitions. [2021-12-06 21:11:09,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:11:09,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5835 transitions. [2021-12-06 21:11:09,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 149.6153846153846) internal successors, (5835), 39 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:09,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 179.0) internal successors, (7160), 40 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:09,631 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 179.0) internal successors, (7160), 40 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:09,631 INFO L186 Difference]: Start difference. First operand has 533 places, 806 transitions, 8672 flow. Second operand 39 states and 5835 transitions. [2021-12-06 21:11:09,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 1121 transitions, 13713 flow [2021-12-06 21:11:11,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1121 transitions, 12611 flow, removed 539 selfloop flow, removed 1 redundant places. [2021-12-06 21:11:11,109 INFO L242 Difference]: Finished difference. Result has 589 places, 965 transitions, 11159 flow [2021-12-06 21:11:11,110 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=8087, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=11159, PETRI_PLACES=589, PETRI_TRANSITIONS=965} [2021-12-06 21:11:11,110 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 429 predicate places. [2021-12-06 21:11:11,110 INFO L470 AbstractCegarLoop]: Abstraction has has 589 places, 965 transitions, 11159 flow [2021-12-06 21:11:11,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 144.64) internal successors, (3616), 25 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:11,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:11:11,111 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:11:11,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 21:11:11,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:11,312 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:11:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash 907635282, now seen corresponding path program 5 times [2021-12-06 21:11:11,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:11:11,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156268702] [2021-12-06 21:11:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:11,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:11:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:11,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:11:11,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156268702] [2021-12-06 21:11:11,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156268702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:11:11,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127179305] [2021-12-06 21:11:11,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:11:11,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:11,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:11:11,500 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:11:11,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 21:11:11,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 21:11:11,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:11:11,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 21:11:11,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:11,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:11:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:12,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127179305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:11:12,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:11:12,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2021-12-06 21:11:12,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209873700] [2021-12-06 21:11:12,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:11:12,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 21:11:12,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:11:12,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 21:11:12,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-12-06 21:11:12,267 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-12-06 21:11:12,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 965 transitions, 11159 flow. Second operand has 20 states, 20 states have (on average 144.75) internal successors, (2895), 20 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:12,269 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:11:12,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-12-06 21:11:12,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:11:22,369 INFO L129 PetriNetUnfolder]: 5627/23379 cut-off events. [2021-12-06 21:11:22,369 INFO L130 PetriNetUnfolder]: For 191200/192062 co-relation queries the response was YES. [2021-12-06 21:11:22,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104484 conditions, 23379 events. 5627/23379 cut-off events. For 191200/192062 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 305979 event pairs, 1577 based on Foata normal form. 240/22088 useless extension candidates. Maximal degree in co-relation 104317. Up to 2290 conditions per place. [2021-12-06 21:11:22,897 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 243 selfloop transitions, 461 changer transitions 0/1164 dead transitions. [2021-12-06 21:11:22,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 1164 transitions, 14708 flow [2021-12-06 21:11:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-06 21:11:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-12-06 21:11:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 10075 transitions. [2021-12-06 21:11:22,904 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8277193558987841 [2021-12-06 21:11:22,904 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 10075 transitions. [2021-12-06 21:11:22,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 10075 transitions. [2021-12-06 21:11:22,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:11:22,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 10075 transitions. [2021-12-06 21:11:22,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 148.16176470588235) internal successors, (10075), 68 states have internal predecessors, (10075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:22,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 179.0) internal successors, (12351), 69 states have internal predecessors, (12351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:22,921 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 179.0) internal successors, (12351), 69 states have internal predecessors, (12351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:22,921 INFO L186 Difference]: Start difference. First operand has 589 places, 965 transitions, 11159 flow. Second operand 68 states and 10075 transitions. [2021-12-06 21:11:22,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 1164 transitions, 14708 flow [2021-12-06 21:11:24,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 1164 transitions, 14284 flow, removed 180 selfloop flow, removed 4 redundant places. [2021-12-06 21:11:24,602 INFO L242 Difference]: Finished difference. Result has 662 places, 1018 transitions, 12891 flow [2021-12-06 21:11:24,602 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=10839, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=12891, PETRI_PLACES=662, PETRI_TRANSITIONS=1018} [2021-12-06 21:11:24,603 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 502 predicate places. [2021-12-06 21:11:24,603 INFO L470 AbstractCegarLoop]: Abstraction has has 662 places, 1018 transitions, 12891 flow [2021-12-06 21:11:24,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 144.75) internal successors, (2895), 20 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:24,603 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:11:24,604 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:11:24,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 21:11:24,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:24,805 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:11:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:24,806 INFO L85 PathProgramCache]: Analyzing trace with hash -214701792, now seen corresponding path program 6 times [2021-12-06 21:11:24,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:11:24,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560632585] [2021-12-06 21:11:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:24,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:11:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:24,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:11:24,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560632585] [2021-12-06 21:11:24,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560632585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:11:24,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993061928] [2021-12-06 21:11:24,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 21:11:24,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:24,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:11:24,952 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:11:24,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 21:11:25,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-06 21:11:25,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:11:25,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 21:11:25,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:25,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:11:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:25,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993061928] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:11:25,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:11:25,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-06 21:11:25,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581149717] [2021-12-06 21:11:25,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:11:25,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 21:11:25,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:11:25,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 21:11:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-12-06 21:11:25,635 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-12-06 21:11:25,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 1018 transitions, 12891 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:25,636 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:11:25,636 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-12-06 21:11:25,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:11:34,603 INFO L129 PetriNetUnfolder]: 5744/23621 cut-off events. [2021-12-06 21:11:34,603 INFO L130 PetriNetUnfolder]: For 207998/208930 co-relation queries the response was YES. [2021-12-06 21:11:35,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109362 conditions, 23621 events. 5744/23621 cut-off events. For 207998/208930 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 309277 event pairs, 1661 based on Foata normal form. 238/22244 useless extension candidates. Maximal degree in co-relation 109184. Up to 2323 conditions per place. [2021-12-06 21:11:35,213 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 291 selfloop transitions, 401 changer transitions 0/1152 dead transitions. [2021-12-06 21:11:35,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 1152 transitions, 15679 flow [2021-12-06 21:11:35,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 21:11:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-06 21:11:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 6953 transitions. [2021-12-06 21:11:35,217 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8264590514679663 [2021-12-06 21:11:35,217 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 6953 transitions. [2021-12-06 21:11:35,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 6953 transitions. [2021-12-06 21:11:35,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:11:35,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 6953 transitions. [2021-12-06 21:11:35,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 147.93617021276594) internal successors, (6953), 47 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:35,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 179.0) internal successors, (8592), 48 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:35,228 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 179.0) internal successors, (8592), 48 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:35,228 INFO L186 Difference]: Start difference. First operand has 662 places, 1018 transitions, 12891 flow. Second operand 47 states and 6953 transitions. [2021-12-06 21:11:35,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 1152 transitions, 15679 flow [2021-12-06 21:11:37,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 1152 transitions, 14951 flow, removed 157 selfloop flow, removed 43 redundant places. [2021-12-06 21:11:37,255 INFO L242 Difference]: Finished difference. Result has 674 places, 1055 transitions, 13877 flow [2021-12-06 21:11:37,256 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=12255, PETRI_DIFFERENCE_MINUEND_PLACES=619, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1018, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=13877, PETRI_PLACES=674, PETRI_TRANSITIONS=1055} [2021-12-06 21:11:37,257 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 514 predicate places. [2021-12-06 21:11:37,257 INFO L470 AbstractCegarLoop]: Abstraction has has 674 places, 1055 transitions, 13877 flow [2021-12-06 21:11:37,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:37,257 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:11:37,257 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:11:37,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 21:11:37,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:37,459 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:11:37,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:37,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2066056026, now seen corresponding path program 7 times [2021-12-06 21:11:37,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:11:37,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279739343] [2021-12-06 21:11:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:37,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:11:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:37,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:11:37,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279739343] [2021-12-06 21:11:37,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279739343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:11:37,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453911749] [2021-12-06 21:11:37,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 21:11:37,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:37,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:11:37,604 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:11:37,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 21:11:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:37,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 21:11:37,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:38,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:11:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:38,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453911749] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:11:38,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:11:38,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-06 21:11:38,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004638788] [2021-12-06 21:11:38,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:11:38,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 21:11:38,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:11:38,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 21:11:38,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-06 21:11:38,345 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-12-06 21:11:38,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 1055 transitions, 13877 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:38,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:11:38,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-12-06 21:11:38,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:11:52,081 INFO L129 PetriNetUnfolder]: 7599/31545 cut-off events. [2021-12-06 21:11:52,081 INFO L130 PetriNetUnfolder]: For 298966/300149 co-relation queries the response was YES. [2021-12-06 21:11:52,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149461 conditions, 31545 events. 7599/31545 cut-off events. For 298966/300149 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 416898 event pairs, 1890 based on Foata normal form. 290/29946 useless extension candidates. Maximal degree in co-relation 149274. Up to 2914 conditions per place. [2021-12-06 21:11:52,969 INFO L132 encePairwiseOnDemand]: 163/179 looper letters, 503 selfloop transitions, 732 changer transitions 0/1695 dead transitions. [2021-12-06 21:11:52,970 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 1695 transitions, 25429 flow [2021-12-06 21:11:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 21:11:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-12-06 21:11:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 9976 transitions. [2021-12-06 21:11:52,975 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8318185608271492 [2021-12-06 21:11:52,975 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 9976 transitions. [2021-12-06 21:11:52,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 9976 transitions. [2021-12-06 21:11:52,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:11:52,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 9976 transitions. [2021-12-06 21:11:52,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 148.8955223880597) internal successors, (9976), 67 states have internal predecessors, (9976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:52,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 179.0) internal successors, (12172), 68 states have internal predecessors, (12172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:52,988 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 179.0) internal successors, (12172), 68 states have internal predecessors, (12172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:52,988 INFO L186 Difference]: Start difference. First operand has 674 places, 1055 transitions, 13877 flow. Second operand 67 states and 9976 transitions. [2021-12-06 21:11:52,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 1695 transitions, 25429 flow [2021-12-06 21:11:56,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 1695 transitions, 25018 flow, removed 79 selfloop flow, removed 21 redundant places. [2021-12-06 21:11:56,333 INFO L242 Difference]: Finished difference. Result has 746 places, 1387 transitions, 21172 flow [2021-12-06 21:11:56,334 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=13568, PETRI_DIFFERENCE_MINUEND_PLACES=653, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=21172, PETRI_PLACES=746, PETRI_TRANSITIONS=1387} [2021-12-06 21:11:56,335 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 586 predicate places. [2021-12-06 21:11:56,335 INFO L470 AbstractCegarLoop]: Abstraction has has 746 places, 1387 transitions, 21172 flow [2021-12-06 21:11:56,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:56,335 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:11:56,335 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:11:56,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 21:11:56,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 21:11:56,537 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:11:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:56,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1855981786, now seen corresponding path program 8 times [2021-12-06 21:11:56,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:11:56,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950844143] [2021-12-06 21:11:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:56,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:11:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:56,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:11:56,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950844143] [2021-12-06 21:11:56,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950844143] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:11:56,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716968971] [2021-12-06 21:11:56,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:11:56,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:11:56,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:11:56,717 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:11:56,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 21:11:56,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:11:56,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:11:56,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 21:11:56,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:57,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:11:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:11:57,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716968971] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:11:57,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:11:57,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-06 21:11:57,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18021270] [2021-12-06 21:11:57,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:11:57,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 21:11:57,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:11:57,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 21:11:57,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-12-06 21:11:57,350 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-12-06 21:11:57,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 1387 transitions, 21172 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:11:57,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:11:57,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-12-06 21:11:57,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:12:11,214 INFO L129 PetriNetUnfolder]: 8103/33187 cut-off events. [2021-12-06 21:12:11,214 INFO L130 PetriNetUnfolder]: For 370311/371897 co-relation queries the response was YES. [2021-12-06 21:12:12,228 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165965 conditions, 33187 events. 8103/33187 cut-off events. For 370311/371897 co-relation queries the response was YES. Maximal size of possible extension queue 916. Compared 442085 event pairs, 2190 based on Foata normal form. 415/31542 useless extension candidates. Maximal degree in co-relation 165752. Up to 3064 conditions per place. [2021-12-06 21:12:12,354 INFO L132 encePairwiseOnDemand]: 163/179 looper letters, 444 selfloop transitions, 698 changer transitions 0/1602 dead transitions. [2021-12-06 21:12:12,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 792 places, 1602 transitions, 26402 flow [2021-12-06 21:12:12,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 21:12:12,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-06 21:12:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 6983 transitions. [2021-12-06 21:12:12,357 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8300249613693094 [2021-12-06 21:12:12,358 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 6983 transitions. [2021-12-06 21:12:12,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 6983 transitions. [2021-12-06 21:12:12,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:12:12,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 6983 transitions. [2021-12-06 21:12:12,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 148.5744680851064) internal successors, (6983), 47 states have internal predecessors, (6983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:12,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 179.0) internal successors, (8592), 48 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:12,368 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 179.0) internal successors, (8592), 48 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:12,368 INFO L186 Difference]: Start difference. First operand has 746 places, 1387 transitions, 21172 flow. Second operand 47 states and 6983 transitions. [2021-12-06 21:12:12,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 792 places, 1602 transitions, 26402 flow [2021-12-06 21:12:16,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 790 places, 1602 transitions, 25307 flow, removed 531 selfloop flow, removed 2 redundant places. [2021-12-06 21:12:16,896 INFO L242 Difference]: Finished difference. Result has 805 places, 1461 transitions, 23464 flow [2021-12-06 21:12:16,898 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=20225, PETRI_DIFFERENCE_MINUEND_PLACES=744, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=626, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=23464, PETRI_PLACES=805, PETRI_TRANSITIONS=1461} [2021-12-06 21:12:16,898 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 645 predicate places. [2021-12-06 21:12:16,898 INFO L470 AbstractCegarLoop]: Abstraction has has 805 places, 1461 transitions, 23464 flow [2021-12-06 21:12:16,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:16,898 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:12:16,898 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:12:16,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 21:12:17,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 21:12:17,100 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:12:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:12:17,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1065363694, now seen corresponding path program 9 times [2021-12-06 21:12:17,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:12:17,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893763710] [2021-12-06 21:12:17,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:12:17,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:12:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:12:17,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:12:17,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893763710] [2021-12-06 21:12:17,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893763710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:12:17,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139105215] [2021-12-06 21:12:17,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:12:17,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:12:17,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:12:17,246 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:12:17,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 21:12:17,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 21:12:17,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:12:17,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 21:12:17,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:12:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:12:17,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:12:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:12:17,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139105215] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:12:17,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:12:17,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-06 21:12:17,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636756912] [2021-12-06 21:12:17,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:12:17,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 21:12:17,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:12:17,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 21:12:17,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-12-06 21:12:17,904 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-12-06 21:12:17,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 805 places, 1461 transitions, 23464 flow. Second operand has 19 states, 19 states have (on average 144.78947368421052) internal successors, (2751), 19 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:17,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:12:17,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-12-06 21:12:17,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:12:35,207 INFO L129 PetriNetUnfolder]: 8831/35679 cut-off events. [2021-12-06 21:12:35,207 INFO L130 PetriNetUnfolder]: For 417237/418905 co-relation queries the response was YES. [2021-12-06 21:12:36,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181274 conditions, 35679 events. 8831/35679 cut-off events. For 417237/418905 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 480994 event pairs, 2290 based on Foata normal form. 433/33824 useless extension candidates. Maximal degree in co-relation 181048. Up to 3332 conditions per place. [2021-12-06 21:12:36,498 INFO L132 encePairwiseOnDemand]: 163/179 looper letters, 444 selfloop transitions, 882 changer transitions 0/1786 dead transitions. [2021-12-06 21:12:36,498 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 878 places, 1786 transitions, 30785 flow [2021-12-06 21:12:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-06 21:12:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-12-06 21:12:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 10974 transitions. [2021-12-06 21:12:36,504 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8284765212139514 [2021-12-06 21:12:36,504 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 10974 transitions. [2021-12-06 21:12:36,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 10974 transitions. [2021-12-06 21:12:36,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:12:36,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 10974 transitions. [2021-12-06 21:12:36,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 148.2972972972973) internal successors, (10974), 74 states have internal predecessors, (10974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:36,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 179.0) internal successors, (13425), 75 states have internal predecessors, (13425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:36,519 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 179.0) internal successors, (13425), 75 states have internal predecessors, (13425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:36,519 INFO L186 Difference]: Start difference. First operand has 805 places, 1461 transitions, 23464 flow. Second operand 74 states and 10974 transitions. [2021-12-06 21:12:36,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 878 places, 1786 transitions, 30785 flow [2021-12-06 21:12:42,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 1786 transitions, 30090 flow, removed 245 selfloop flow, removed 5 redundant places. [2021-12-06 21:12:42,106 INFO L242 Difference]: Finished difference. Result has 887 places, 1590 transitions, 27677 flow [2021-12-06 21:12:42,108 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=22927, PETRI_DIFFERENCE_MINUEND_PLACES=800, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=763, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=27677, PETRI_PLACES=887, PETRI_TRANSITIONS=1590} [2021-12-06 21:12:42,108 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 727 predicate places. [2021-12-06 21:12:42,108 INFO L470 AbstractCegarLoop]: Abstraction has has 887 places, 1590 transitions, 27677 flow [2021-12-06 21:12:42,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.78947368421052) internal successors, (2751), 19 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:42,108 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:12:42,109 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:12:42,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 21:12:42,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 21:12:42,309 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:12:42,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:12:42,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1051776870, now seen corresponding path program 10 times [2021-12-06 21:12:42,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:12:42,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206611077] [2021-12-06 21:12:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:12:42,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:12:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:12:42,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:12:42,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206611077] [2021-12-06 21:12:42,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206611077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:12:42,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025235736] [2021-12-06 21:12:42,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:12:42,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:12:42,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:12:42,430 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:12:42,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 21:12:42,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:12:42,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:12:42,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 21:12:42,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:12:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:12:42,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:12:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:12:43,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025235736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:12:43,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:12:43,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-06 21:12:43,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942376816] [2021-12-06 21:12:43,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:12:43,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 21:12:43,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:12:43,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 21:12:43,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-12-06 21:12:43,073 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-12-06 21:12:43,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 887 places, 1590 transitions, 27677 flow. Second operand has 21 states, 21 states have (on average 144.71428571428572) internal successors, (3039), 21 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:12:43,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:12:43,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-12-06 21:12:43,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:13:02,035 INFO L129 PetriNetUnfolder]: 9415/37502 cut-off events. [2021-12-06 21:13:02,035 INFO L130 PetriNetUnfolder]: For 465721/467492 co-relation queries the response was YES. [2021-12-06 21:13:03,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 197935 conditions, 37502 events. 9415/37502 cut-off events. For 465721/467492 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 505646 event pairs, 2396 based on Foata normal form. 458/35507 useless extension candidates. Maximal degree in co-relation 197696. Up to 3467 conditions per place. [2021-12-06 21:13:03,852 INFO L132 encePairwiseOnDemand]: 162/179 looper letters, 529 selfloop transitions, 1057 changer transitions 0/2046 dead transitions. [2021-12-06 21:13:03,853 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 975 places, 2046 transitions, 38244 flow [2021-12-06 21:13:03,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 21:13:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-12-06 21:13:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 13219 transitions. [2021-12-06 21:13:03,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8297658652940807 [2021-12-06 21:13:03,859 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 13219 transitions. [2021-12-06 21:13:03,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 13219 transitions. [2021-12-06 21:13:03,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:13:03,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 13219 transitions. [2021-12-06 21:13:03,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 148.52808988764045) internal successors, (13219), 89 states have internal predecessors, (13219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:13:03,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 179.0) internal successors, (16110), 90 states have internal predecessors, (16110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:13:03,880 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 179.0) internal successors, (16110), 90 states have internal predecessors, (16110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:13:03,880 INFO L186 Difference]: Start difference. First operand has 887 places, 1590 transitions, 27677 flow. Second operand 89 states and 13219 transitions. [2021-12-06 21:13:03,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 975 places, 2046 transitions, 38244 flow [2021-12-06 21:13:10,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 945 places, 2046 transitions, 37217 flow, removed 183 selfloop flow, removed 30 redundant places. [2021-12-06 21:13:10,603 INFO L242 Difference]: Finished difference. Result has 969 places, 1749 transitions, 33746 flow [2021-12-06 21:13:10,605 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=26790, PETRI_DIFFERENCE_MINUEND_PLACES=857, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=904, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=33746, PETRI_PLACES=969, PETRI_TRANSITIONS=1749} [2021-12-06 21:13:10,605 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 809 predicate places. [2021-12-06 21:13:10,605 INFO L470 AbstractCegarLoop]: Abstraction has has 969 places, 1749 transitions, 33746 flow [2021-12-06 21:13:10,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 144.71428571428572) internal successors, (3039), 21 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:13:10,606 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:13:10,606 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:13:10,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 21:13:10,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 21:13:10,807 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:13:10,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:13:10,808 INFO L85 PathProgramCache]: Analyzing trace with hash -291412332, now seen corresponding path program 11 times [2021-12-06 21:13:10,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:13:10,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233854081] [2021-12-06 21:13:10,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:13:10,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:13:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:13:10,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:13:10,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233854081] [2021-12-06 21:13:10,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233854081] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:13:10,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340320611] [2021-12-06 21:13:10,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:13:10,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:13:10,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:13:10,950 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:13:10,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 21:13:11,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 21:13:11,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:13:11,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 21:13:11,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:13:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:13:11,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:13:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:13:11,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340320611] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:13:11,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:13:11,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-06 21:13:11,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045021743] [2021-12-06 21:13:11,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:13:11,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 21:13:11,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:13:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 21:13:11,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-12-06 21:13:11,563 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-12-06 21:13:11,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 1749 transitions, 33746 flow. Second operand has 25 states, 25 states have (on average 144.64) internal successors, (3616), 25 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:13:11,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 21:13:11,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-12-06 21:13:11,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 21:13:31,566 INFO L129 PetriNetUnfolder]: 10606/42122 cut-off events. [2021-12-06 21:13:31,566 INFO L130 PetriNetUnfolder]: For 593382/595351 co-relation queries the response was YES. [2021-12-06 21:13:33,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231444 conditions, 42122 events. 10606/42122 cut-off events. For 593382/595351 co-relation queries the response was YES. Maximal size of possible extension queue 1318. Compared 579378 event pairs, 3065 based on Foata normal form. 485/39817 useless extension candidates. Maximal degree in co-relation 231182. Up to 3780 conditions per place. [2021-12-06 21:13:33,655 INFO L132 encePairwiseOnDemand]: 163/179 looper letters, 545 selfloop transitions, 1185 changer transitions 0/2190 dead transitions. [2021-12-06 21:13:33,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1024 places, 2190 transitions, 45911 flow [2021-12-06 21:13:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 21:13:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-12-06 21:13:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 8333 transitions. [2021-12-06 21:13:33,659 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8313048683160414 [2021-12-06 21:13:33,659 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 8333 transitions. [2021-12-06 21:13:33,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 8333 transitions. [2021-12-06 21:13:33,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 21:13:33,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 8333 transitions. [2021-12-06 21:13:33,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 148.80357142857142) internal successors, (8333), 56 states have internal predecessors, (8333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:13:33,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 179.0) internal successors, (10203), 57 states have internal predecessors, (10203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:13:33,671 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 179.0) internal successors, (10203), 57 states have internal predecessors, (10203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:13:33,671 INFO L186 Difference]: Start difference. First operand has 969 places, 1749 transitions, 33746 flow. Second operand 56 states and 8333 transitions. [2021-12-06 21:13:33,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1024 places, 2190 transitions, 45911 flow [2021-12-06 21:13:43,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 994 places, 2190 transitions, 44140 flow, removed 530 selfloop flow, removed 30 redundant places. [2021-12-06 21:13:43,212 INFO L242 Difference]: Finished difference. Result has 1011 places, 1944 transitions, 40455 flow [2021-12-06 21:13:43,214 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=32329, PETRI_DIFFERENCE_MINUEND_PLACES=939, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=993, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=40455, PETRI_PLACES=1011, PETRI_TRANSITIONS=1944} [2021-12-06 21:13:43,214 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 851 predicate places. [2021-12-06 21:13:43,214 INFO L470 AbstractCegarLoop]: Abstraction has has 1011 places, 1944 transitions, 40455 flow [2021-12-06 21:13:43,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 144.64) internal successors, (3616), 25 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:13:43,215 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 21:13:43,215 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:13:43,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 21:13:43,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 21:13:43,416 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 21:13:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:13:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash 650179082, now seen corresponding path program 12 times [2021-12-06 21:13:43,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:13:43,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168842702] [2021-12-06 21:13:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:13:43,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:13:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:13:43,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:13:43,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168842702] [2021-12-06 21:13:43,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168842702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:13:43,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309148131] [2021-12-06 21:13:43,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 21:13:43,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:13:43,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:13:43,549 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:13:43,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e3d46-ba2b-4968-a3a5-ddebef1c5ff3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 21:13:43,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-06 21:13:43,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:13:43,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 21:13:43,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:13:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:13:43,868 INFO L328 TraceCheckSpWp]: Computing backward predicates...