./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3 --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 57986f5df1647173a809f7445e253a7d11975932 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:21:10,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:21:10,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:21:10,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:21:10,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:21:10,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:21:10,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:21:10,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:21:10,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:21:10,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:21:10,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:21:10,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:21:10,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:21:10,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:21:11,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:21:11,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:21:11,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:21:11,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:21:11,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:21:11,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:21:11,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:21:11,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:21:11,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:21:11,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:21:11,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:21:11,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:21:11,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:21:11,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:21:11,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:21:11,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:21:11,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:21:11,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:21:11,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:21:11,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:21:11,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:21:11,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:21:11,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:21:11,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:21:11,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:21:11,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:21:11,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:21:11,056 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:21:11,105 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:21:11,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:21:11,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:21:11,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:21:11,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:21:11,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:21:11,115 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:21:11,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:21:11,115 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:21:11,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:21:11,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:21:11,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:21:11,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:21:11,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:21:11,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:21:11,119 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:21:11,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:21:11,119 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:21:11,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:21:11,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:21:11,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:21:11,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:21:11,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:21:11,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:21:11,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:21:11,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:21:11,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:21:11,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:21:11,123 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:21:11,125 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:21:11,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:21:11,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:21:11,126 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_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57986f5df1647173a809f7445e253a7d11975932 [2021-10-15 19:21:11,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:21:11,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:21:11,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:21:11,422 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:21:11,422 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:21:11,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem01_label05.c [2021-10-15 19:21:11,504 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/data/9a0c01ba3/45b255b1cd024dbe80112a7def89dfca/FLAG5d093868a [2021-10-15 19:21:12,078 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:21:12,079 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/sv-benchmarks/c/eca-rers2012/Problem01_label05.c [2021-10-15 19:21:12,090 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/data/9a0c01ba3/45b255b1cd024dbe80112a7def89dfca/FLAG5d093868a [2021-10-15 19:21:12,342 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/data/9a0c01ba3/45b255b1cd024dbe80112a7def89dfca [2021-10-15 19:21:12,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:21:12,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:21:12,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:21:12,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:21:12,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:21:12,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:21:12" (1/1) ... [2021-10-15 19:21:12,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c7a5e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:12, skipping insertion in model container [2021-10-15 19:21:12,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:21:12" (1/1) ... [2021-10-15 19:21:12,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:21:12,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:21:12,768 WARN L228 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_022dea53-df2d-44d3-8179-fd665d1bd0fc/sv-benchmarks/c/eca-rers2012/Problem01_label05.c[17240,17253] [2021-10-15 19:21:12,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:21:12,824 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:21:12,964 WARN L228 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_022dea53-df2d-44d3-8179-fd665d1bd0fc/sv-benchmarks/c/eca-rers2012/Problem01_label05.c[17240,17253] [2021-10-15 19:21:12,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:21:13,022 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:21:13,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:13 WrapperNode [2021-10-15 19:21:13,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:21:13,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:21:13,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:21:13,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:21:13,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:13" (1/1) ... [2021-10-15 19:21:13,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:13" (1/1) ... [2021-10-15 19:21:13,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:21:13,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:21:13,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:21:13,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:21:13,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:13" (1/1) ... [2021-10-15 19:21:13,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:13" (1/1) ... [2021-10-15 19:21:13,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:13" (1/1) ... [2021-10-15 19:21:13,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:13" (1/1) ... [2021-10-15 19:21:13,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:13" (1/1) ... [2021-10-15 19:21:13,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:13" (1/1) ... [2021-10-15 19:21:13,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:13" (1/1) ... [2021-10-15 19:21:13,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:21:13,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:21:13,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:21:13,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:21:13,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:13" (1/1) ... [2021-10-15 19:21:13,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:21:13,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:13,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:21:13,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:21:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:21:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:21:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:21:13,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:21:14,612 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:21:14,613 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:21:14,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:21:14 BoogieIcfgContainer [2021-10-15 19:21:14,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:21:14,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:21:14,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:21:14,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:21:14,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:21:12" (1/3) ... [2021-10-15 19:21:14,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ce840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:21:14, skipping insertion in model container [2021-10-15 19:21:14,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:21:13" (2/3) ... [2021-10-15 19:21:14,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ce840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:21:14, skipping insertion in model container [2021-10-15 19:21:14,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:21:14" (3/3) ... [2021-10-15 19:21:14,637 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label05.c [2021-10-15 19:21:14,652 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:21:14,652 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:21:14,724 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:21:14,730 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, mConcurrency=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 [2021-10-15 19:21:14,730 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:21:14,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:21:14,876 INFO L129 PetriNetUnfolder]: 130/327 cut-off events. [2021-10-15 19:21:14,876 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:21:14,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 327 events. 130/327 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 203 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2021-10-15 19:21:14,879 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:21:14,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 322 transitions, 644 flow [2021-10-15 19:21:14,934 INFO L129 PetriNetUnfolder]: 89/206 cut-off events. [2021-10-15 19:21:14,934 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:21:14,934 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:14,935 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] [2021-10-15 19:21:14,936 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:14,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1877985287, now seen corresponding path program 1 times [2021-10-15 19:21:14,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:14,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051033637] [2021-10-15 19:21:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:14,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:21:15,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:15,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051033637] [2021-10-15 19:21:15,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051033637] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:15,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:21:15,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:21:15,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761429004] [2021-10-15 19:21:15,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:15,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:15,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:15,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:21:15,410 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:15,414 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 322 transitions, 644 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2021-10-15 19:21:15,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:15,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:15,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:16,284 INFO L129 PetriNetUnfolder]: 115/465 cut-off events. [2021-10-15 19:21:16,284 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:21:16,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 465 events. 115/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 711 event pairs, 0 based on Foata normal form. 86/351 useless extension candidates. Maximal degree in co-relation 1. Up to 266 conditions per place. [2021-10-15 19:21:16,291 INFO L132 encePairwiseOnDemand]: 185/327 looper letters, 334 selfloop transitions, 36 changer transitions 85/461 dead transitions. [2021-10-15 19:21:16,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 461 transitions, 1832 flow [2021-10-15 19:21:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2021-10-15 19:21:16,312 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6340468909276249 [2021-10-15 19:21:16,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2021-10-15 19:21:16,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2021-10-15 19:21:16,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:16,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2021-10-15 19:21:16,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 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) [2021-10-15 19:21:16,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:16,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:16,343 INFO L186 Difference]: Start difference. First operand has 195 places, 322 transitions, 644 flow. Second operand 3 states and 622 transitions. [2021-10-15 19:21:16,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 461 transitions, 1832 flow [2021-10-15 19:21:16,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 461 transitions, 1832 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:21:16,368 INFO L242 Difference]: Finished difference. Result has 199 places, 227 transitions, 670 flow [2021-10-15 19:21:16,370 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=670, PETRI_PLACES=199, PETRI_TRANSITIONS=227} [2021-10-15 19:21:16,371 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, 4 predicate places. [2021-10-15 19:21:16,371 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 227 transitions, 670 flow [2021-10-15 19:21:16,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2021-10-15 19:21:16,372 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:16,373 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:16,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:21:16,373 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:16,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:16,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1993122394, now seen corresponding path program 1 times [2021-10-15 19:21:16,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:16,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851212957] [2021-10-15 19:21:16,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:16,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:21:16,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:16,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851212957] [2021-10-15 19:21:16,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851212957] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:16,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:21:16,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:21:16,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96423894] [2021-10-15 19:21:16,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:16,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:16,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:16,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:21:16,500 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:16,500 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 227 transitions, 670 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2021-10-15 19:21:16,500 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:16,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:16,501 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:17,112 INFO L129 PetriNetUnfolder]: 181/708 cut-off events. [2021-10-15 19:21:17,114 INFO L130 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2021-10-15 19:21:17,116 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1585 conditions, 708 events. 181/708 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1701 event pairs, 0 based on Foata normal form. 21/669 useless extension candidates. Maximal degree in co-relation 742. Up to 365 conditions per place. [2021-10-15 19:21:17,122 INFO L132 encePairwiseOnDemand]: 259/327 looper letters, 325 selfloop transitions, 81 changer transitions 0/412 dead transitions. [2021-10-15 19:21:17,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 412 transitions, 2002 flow [2021-10-15 19:21:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-10-15 19:21:17,126 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4240570846075433 [2021-10-15 19:21:17,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-10-15 19:21:17,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-10-15 19:21:17,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:17,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-10-15 19:21:17,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2021-10-15 19:21:17,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:17,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:17,137 INFO L186 Difference]: Start difference. First operand has 199 places, 227 transitions, 670 flow. Second operand 3 states and 416 transitions. [2021-10-15 19:21:17,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 412 transitions, 2002 flow [2021-10-15 19:21:17,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 412 transitions, 1880 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:21:17,167 INFO L242 Difference]: Finished difference. Result has 141 places, 285 transitions, 1280 flow [2021-10-15 19:21:17,168 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1280, PETRI_PLACES=141, PETRI_TRANSITIONS=285} [2021-10-15 19:21:17,175 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -54 predicate places. [2021-10-15 19:21:17,175 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 285 transitions, 1280 flow [2021-10-15 19:21:17,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2021-10-15 19:21:17,176 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:17,176 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-10-15 19:21:17,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:21:17,177 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:17,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1992663058, now seen corresponding path program 1 times [2021-10-15 19:21:17,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:17,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92790016] [2021-10-15 19:21:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:17,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:21:17,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:17,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92790016] [2021-10-15 19:21:17,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92790016] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:17,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:21:17,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:21:17,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516149150] [2021-10-15 19:21:17,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:17,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:21:17,309 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:17,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 285 transitions, 1280 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2021-10-15 19:21:17,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:17,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:17,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:18,009 INFO L129 PetriNetUnfolder]: 242/1293 cut-off events. [2021-10-15 19:21:18,010 INFO L130 PetriNetUnfolder]: For 574/574 co-relation queries the response was YES. [2021-10-15 19:21:18,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3104 conditions, 1293 events. 242/1293 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4845 event pairs, 0 based on Foata normal form. 120/1413 useless extension candidates. Maximal degree in co-relation 1257. Up to 636 conditions per place. [2021-10-15 19:21:18,018 INFO L132 encePairwiseOnDemand]: 260/327 looper letters, 345 selfloop transitions, 122 changer transitions 0/473 dead transitions. [2021-10-15 19:21:18,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 473 transitions, 2894 flow [2021-10-15 19:21:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-10-15 19:21:18,022 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4240570846075433 [2021-10-15 19:21:18,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-10-15 19:21:18,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-10-15 19:21:18,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:18,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-10-15 19:21:18,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2021-10-15 19:21:18,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:18,029 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:18,029 INFO L186 Difference]: Start difference. First operand has 141 places, 285 transitions, 1280 flow. Second operand 3 states and 416 transitions. [2021-10-15 19:21:18,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 473 transitions, 2894 flow [2021-10-15 19:21:18,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 473 transitions, 2672 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:21:18,057 INFO L242 Difference]: Finished difference. Result has 143 places, 346 transitions, 2152 flow [2021-10-15 19:21:18,058 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2152, PETRI_PLACES=143, PETRI_TRANSITIONS=346} [2021-10-15 19:21:18,058 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -52 predicate places. [2021-10-15 19:21:18,059 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 346 transitions, 2152 flow [2021-10-15 19:21:18,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2021-10-15 19:21:18,059 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:18,059 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 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] [2021-10-15 19:21:18,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:21:18,060 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:18,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:18,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1576233932, now seen corresponding path program 1 times [2021-10-15 19:21:18,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:18,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185350305] [2021-10-15 19:21:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:18,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:21:18,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:18,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185350305] [2021-10-15 19:21:18,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185350305] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:18,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:21:18,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:21:18,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782789672] [2021-10-15 19:21:18,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:18,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:18,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:18,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:21:18,193 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:18,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 346 transitions, 2152 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-10-15 19:21:18,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:18,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:18,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:19,188 INFO L129 PetriNetUnfolder]: 369/2206 cut-off events. [2021-10-15 19:21:19,188 INFO L130 PetriNetUnfolder]: For 1818/1818 co-relation queries the response was YES. [2021-10-15 19:21:19,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5568 conditions, 2206 events. 369/2206 cut-off events. For 1818/1818 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 11085 event pairs, 0 based on Foata normal form. 84/2290 useless extension candidates. Maximal degree in co-relation 1629. Up to 1228 conditions per place. [2021-10-15 19:21:19,205 INFO L132 encePairwiseOnDemand]: 260/327 looper letters, 408 selfloop transitions, 172 changer transitions 0/586 dead transitions. [2021-10-15 19:21:19,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 586 transitions, 4570 flow [2021-10-15 19:21:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:19,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-10-15 19:21:19,209 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4240570846075433 [2021-10-15 19:21:19,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-10-15 19:21:19,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-10-15 19:21:19,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:19,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-10-15 19:21:19,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2021-10-15 19:21:19,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:19,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:19,218 INFO L186 Difference]: Start difference. First operand has 143 places, 346 transitions, 2152 flow. Second operand 3 states and 416 transitions. [2021-10-15 19:21:19,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 586 transitions, 4570 flow [2021-10-15 19:21:19,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 586 transitions, 4198 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:21:19,256 INFO L242 Difference]: Finished difference. Result has 145 places, 459 transitions, 3752 flow [2021-10-15 19:21:19,257 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3752, PETRI_PLACES=145, PETRI_TRANSITIONS=459} [2021-10-15 19:21:19,258 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -50 predicate places. [2021-10-15 19:21:19,258 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 459 transitions, 3752 flow [2021-10-15 19:21:19,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-10-15 19:21:19,259 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:19,259 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:19,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:21:19,260 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash 491046698, now seen corresponding path program 1 times [2021-10-15 19:21:19,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:19,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905639883] [2021-10-15 19:21:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:19,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 19:21:19,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:19,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905639883] [2021-10-15 19:21:19,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905639883] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:19,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:21:19,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:21:19,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377543526] [2021-10-15 19:21:19,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:19,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:21:19,377 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:19,378 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 459 transitions, 3752 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2021-10-15 19:21:19,378 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:19,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:19,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:20,787 INFO L129 PetriNetUnfolder]: 443/3328 cut-off events. [2021-10-15 19:21:20,787 INFO L130 PetriNetUnfolder]: For 4357/4357 co-relation queries the response was YES. [2021-10-15 19:21:20,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8435 conditions, 3328 events. 443/3328 cut-off events. For 4357/4357 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 20897 event pairs, 0 based on Foata normal form. 168/3496 useless extension candidates. Maximal degree in co-relation 2909. Up to 1871 conditions per place. [2021-10-15 19:21:20,803 INFO L132 encePairwiseOnDemand]: 259/327 looper letters, 432 selfloop transitions, 63 changer transitions 143/644 dead transitions. [2021-10-15 19:21:20,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 644 transitions, 5882 flow [2021-10-15 19:21:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-10-15 19:21:20,807 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4240570846075433 [2021-10-15 19:21:20,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-10-15 19:21:20,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-10-15 19:21:20,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:20,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-10-15 19:21:20,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2021-10-15 19:21:20,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:20,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:20,814 INFO L186 Difference]: Start difference. First operand has 145 places, 459 transitions, 3752 flow. Second operand 3 states and 416 transitions. [2021-10-15 19:21:20,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 644 transitions, 5882 flow [2021-10-15 19:21:20,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 644 transitions, 5464 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:21:20,850 INFO L242 Difference]: Finished difference. Result has 147 places, 374 transitions, 2974 flow [2021-10-15 19:21:20,852 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3348, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2974, PETRI_PLACES=147, PETRI_TRANSITIONS=374} [2021-10-15 19:21:20,852 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -48 predicate places. [2021-10-15 19:21:20,852 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 374 transitions, 2974 flow [2021-10-15 19:21:20,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2021-10-15 19:21:20,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:20,853 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:20,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:21:20,853 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:20,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:20,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1642863660, now seen corresponding path program 1 times [2021-10-15 19:21:20,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:20,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840678680] [2021-10-15 19:21:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:20,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-15 19:21:20,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:20,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840678680] [2021-10-15 19:21:20,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840678680] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:20,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:21:20,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:21:20,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890748399] [2021-10-15 19:21:20,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:20,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:20,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:20,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:21:20,905 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:20,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 374 transitions, 2974 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2021-10-15 19:21:20,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:20,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:20,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:22,299 INFO L129 PetriNetUnfolder]: 458/3867 cut-off events. [2021-10-15 19:21:22,299 INFO L130 PetriNetUnfolder]: For 3957/3957 co-relation queries the response was YES. [2021-10-15 19:21:22,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9741 conditions, 3867 events. 458/3867 cut-off events. For 3957/3957 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 26340 event pairs, 0 based on Foata normal form. 4/3871 useless extension candidates. Maximal degree in co-relation 5008. Up to 2751 conditions per place. [2021-10-15 19:21:22,324 INFO L132 encePairwiseOnDemand]: 281/327 looper letters, 460 selfloop transitions, 153 changer transitions 0/619 dead transitions. [2021-10-15 19:21:22,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 619 transitions, 5774 flow [2021-10-15 19:21:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2021-10-15 19:21:22,327 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37920489296636084 [2021-10-15 19:21:22,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2021-10-15 19:21:22,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2021-10-15 19:21:22,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:22,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2021-10-15 19:21:22,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 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) [2021-10-15 19:21:22,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:22,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:22,334 INFO L186 Difference]: Start difference. First operand has 147 places, 374 transitions, 2974 flow. Second operand 3 states and 372 transitions. [2021-10-15 19:21:22,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 619 transitions, 5774 flow [2021-10-15 19:21:22,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 619 transitions, 5588 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:21:22,364 INFO L242 Difference]: Finished difference. Result has 149 places, 492 transitions, 4960 flow [2021-10-15 19:21:22,365 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2848, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4960, PETRI_PLACES=149, PETRI_TRANSITIONS=492} [2021-10-15 19:21:22,366 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -46 predicate places. [2021-10-15 19:21:22,366 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 492 transitions, 4960 flow [2021-10-15 19:21:22,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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) [2021-10-15 19:21:22,366 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:22,367 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-10-15 19:21:22,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:21:22,367 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash -848374645, now seen corresponding path program 1 times [2021-10-15 19:21:22,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:22,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473751043] [2021-10-15 19:21:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:22,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-15 19:21:22,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:22,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473751043] [2021-10-15 19:21:22,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473751043] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:22,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:21:22,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:21:22,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795377655] [2021-10-15 19:21:22,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:22,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:22,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:22,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:21:22,449 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:22,449 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 492 transitions, 4960 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2021-10-15 19:21:22,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:22,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:22,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:23,982 INFO L129 PetriNetUnfolder]: 455/3995 cut-off events. [2021-10-15 19:21:23,982 INFO L130 PetriNetUnfolder]: For 6162/6162 co-relation queries the response was YES. [2021-10-15 19:21:23,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10408 conditions, 3995 events. 455/3995 cut-off events. For 6162/6162 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 27550 event pairs, 0 based on Foata normal form. 20/4015 useless extension candidates. Maximal degree in co-relation 3400. Up to 3338 conditions per place. [2021-10-15 19:21:24,006 INFO L132 encePairwiseOnDemand]: 297/327 looper letters, 546 selfloop transitions, 53 changer transitions 11/616 dead transitions. [2021-10-15 19:21:24,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 616 transitions, 6418 flow [2021-10-15 19:21:24,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:24,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2021-10-15 19:21:24,009 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36289500509684 [2021-10-15 19:21:24,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2021-10-15 19:21:24,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2021-10-15 19:21:24,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:24,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2021-10-15 19:21:24,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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) [2021-10-15 19:21:24,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:24,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:24,016 INFO L186 Difference]: Start difference. First operand has 149 places, 492 transitions, 4960 flow. Second operand 3 states and 356 transitions. [2021-10-15 19:21:24,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 616 transitions, 6418 flow [2021-10-15 19:21:24,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 616 transitions, 5972 flow, removed 70 selfloop flow, removed 2 redundant places. [2021-10-15 19:21:24,053 INFO L242 Difference]: Finished difference. Result has 151 places, 478 transitions, 4598 flow [2021-10-15 19:21:24,054 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4598, PETRI_PLACES=151, PETRI_TRANSITIONS=478} [2021-10-15 19:21:24,055 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -44 predicate places. [2021-10-15 19:21:24,055 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 478 transitions, 4598 flow [2021-10-15 19:21:24,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2021-10-15 19:21:24,055 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:24,056 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-10-15 19:21:24,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:21:24,056 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:24,057 INFO L82 PathProgramCache]: Analyzing trace with hash -732302653, now seen corresponding path program 1 times [2021-10-15 19:21:24,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:24,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612015962] [2021-10-15 19:21:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:24,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 19:21:24,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:24,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612015962] [2021-10-15 19:21:24,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612015962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:24,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862819756] [2021-10-15 19:21:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:24,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:24,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:24,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:24,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:21:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:24,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:21:24,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-15 19:21:24,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862819756] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:24,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:24,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 19:21:24,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310231241] [2021-10-15 19:21:24,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:24,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:24,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:24,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:21:24,853 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:24,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 478 transitions, 4598 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2021-10-15 19:21:24,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:24,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:24,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:26,496 INFO L129 PetriNetUnfolder]: 416/3825 cut-off events. [2021-10-15 19:21:26,496 INFO L130 PetriNetUnfolder]: For 4973/4973 co-relation queries the response was YES. [2021-10-15 19:21:26,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9701 conditions, 3825 events. 416/3825 cut-off events. For 4973/4973 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 26091 event pairs, 0 based on Foata normal form. 28/3853 useless extension candidates. Maximal degree in co-relation 3082. Up to 2159 conditions per place. [2021-10-15 19:21:26,515 INFO L132 encePairwiseOnDemand]: 294/327 looper letters, 428 selfloop transitions, 155 changer transitions 0/589 dead transitions. [2021-10-15 19:21:26,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 589 transitions, 5830 flow [2021-10-15 19:21:26,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:26,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2021-10-15 19:21:26,518 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.35881753312945974 [2021-10-15 19:21:26,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2021-10-15 19:21:26,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2021-10-15 19:21:26,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:26,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2021-10-15 19:21:26,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 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) [2021-10-15 19:21:26,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:26,523 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:26,524 INFO L186 Difference]: Start difference. First operand has 151 places, 478 transitions, 4598 flow. Second operand 3 states and 352 transitions. [2021-10-15 19:21:26,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 589 transitions, 5830 flow [2021-10-15 19:21:26,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 589 transitions, 5724 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:21:26,556 INFO L242 Difference]: Finished difference. Result has 151 places, 462 transitions, 4614 flow [2021-10-15 19:21:26,557 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=4304, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4614, PETRI_PLACES=151, PETRI_TRANSITIONS=462} [2021-10-15 19:21:26,557 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -44 predicate places. [2021-10-15 19:21:26,557 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 462 transitions, 4614 flow [2021-10-15 19:21:26,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2021-10-15 19:21:26,558 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:26,558 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:26,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:26,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:26,771 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:26,772 INFO L82 PathProgramCache]: Analyzing trace with hash -545671403, now seen corresponding path program 1 times [2021-10-15 19:21:26,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:26,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022640805] [2021-10-15 19:21:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:26,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-15 19:21:26,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:26,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022640805] [2021-10-15 19:21:26,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022640805] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:26,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624347073] [2021-10-15 19:21:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:26,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:26,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:26,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:26,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:21:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:27,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:21:27,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-15 19:21:27,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624347073] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:27,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:27,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 19:21:27,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807444490] [2021-10-15 19:21:27,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:27,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:27,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:27,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:21:27,399 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:27,399 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 462 transitions, 4614 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2021-10-15 19:21:27,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:27,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:27,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:28,863 INFO L129 PetriNetUnfolder]: 364/3904 cut-off events. [2021-10-15 19:21:28,863 INFO L130 PetriNetUnfolder]: For 5577/5577 co-relation queries the response was YES. [2021-10-15 19:21:28,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9718 conditions, 3904 events. 364/3904 cut-off events. For 5577/5577 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 27083 event pairs, 0 based on Foata normal form. 69/3973 useless extension candidates. Maximal degree in co-relation 3794. Up to 2391 conditions per place. [2021-10-15 19:21:28,875 INFO L132 encePairwiseOnDemand]: 287/327 looper letters, 428 selfloop transitions, 124 changer transitions 0/558 dead transitions. [2021-10-15 19:21:28,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 558 transitions, 5564 flow [2021-10-15 19:21:28,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2021-10-15 19:21:28,878 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3669724770642202 [2021-10-15 19:21:28,878 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2021-10-15 19:21:28,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2021-10-15 19:21:28,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:28,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2021-10-15 19:21:28,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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) [2021-10-15 19:21:28,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:28,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:28,884 INFO L186 Difference]: Start difference. First operand has 151 places, 462 transitions, 4614 flow. Second operand 3 states and 360 transitions. [2021-10-15 19:21:28,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 558 transitions, 5564 flow [2021-10-15 19:21:28,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 558 transitions, 5419 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:21:28,912 INFO L242 Difference]: Finished difference. Result has 154 places, 431 transitions, 4591 flow [2021-10-15 19:21:28,912 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4591, PETRI_PLACES=154, PETRI_TRANSITIONS=431} [2021-10-15 19:21:28,913 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -41 predicate places. [2021-10-15 19:21:28,913 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 431 transitions, 4591 flow [2021-10-15 19:21:28,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2021-10-15 19:21:28,913 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:28,914 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:28,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-15 19:21:29,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:29,128 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:29,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:29,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2007939310, now seen corresponding path program 1 times [2021-10-15 19:21:29,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:29,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693452909] [2021-10-15 19:21:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:29,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-15 19:21:29,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:29,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693452909] [2021-10-15 19:21:29,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693452909] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:29,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393231574] [2021-10-15 19:21:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:29,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:29,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:29,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:29,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:21:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:29,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:21:29,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-15 19:21:29,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393231574] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:29,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:29,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 19:21:29,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740276329] [2021-10-15 19:21:29,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:29,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:29,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:29,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:21:29,826 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:29,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 431 transitions, 4591 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-10-15 19:21:29,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:29,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:29,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:31,554 INFO L129 PetriNetUnfolder]: 405/4731 cut-off events. [2021-10-15 19:21:31,554 INFO L130 PetriNetUnfolder]: For 8081/8081 co-relation queries the response was YES. [2021-10-15 19:21:31,559 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11839 conditions, 4731 events. 405/4731 cut-off events. For 8081/8081 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 35301 event pairs, 0 based on Foata normal form. 67/4798 useless extension candidates. Maximal degree in co-relation 4772. Up to 2643 conditions per place. [2021-10-15 19:21:31,571 INFO L132 encePairwiseOnDemand]: 294/327 looper letters, 433 selfloop transitions, 142 changer transitions 0/581 dead transitions. [2021-10-15 19:21:31,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 581 transitions, 6308 flow [2021-10-15 19:21:31,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2021-10-15 19:21:31,582 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.363914373088685 [2021-10-15 19:21:31,582 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2021-10-15 19:21:31,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2021-10-15 19:21:31,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:31,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2021-10-15 19:21:31,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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) [2021-10-15 19:21:31,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:31,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:31,588 INFO L186 Difference]: Start difference. First operand has 154 places, 431 transitions, 4591 flow. Second operand 3 states and 357 transitions. [2021-10-15 19:21:31,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 581 transitions, 6308 flow [2021-10-15 19:21:31,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 581 transitions, 6056 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:21:31,621 INFO L242 Difference]: Finished difference. Result has 156 places, 454 transitions, 5364 flow [2021-10-15 19:21:31,622 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3887, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5364, PETRI_PLACES=156, PETRI_TRANSITIONS=454} [2021-10-15 19:21:31,622 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -39 predicate places. [2021-10-15 19:21:31,623 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 454 transitions, 5364 flow [2021-10-15 19:21:31,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-10-15 19:21:31,623 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:31,623 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 19:21:31,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:31,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:21:31,844 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:31,845 INFO L82 PathProgramCache]: Analyzing trace with hash -773097767, now seen corresponding path program 1 times [2021-10-15 19:21:31,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:31,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737694355] [2021-10-15 19:21:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:31,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-15 19:21:31,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:31,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737694355] [2021-10-15 19:21:31,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737694355] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:31,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826060541] [2021-10-15 19:21:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:31,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:31,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:31,946 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:31,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:21:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:32,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:21:32,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-10-15 19:21:32,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826060541] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:32,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:32,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 19:21:32,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681780924] [2021-10-15 19:21:32,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:32,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:32,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:32,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:21:32,773 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:32,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 454 transitions, 5364 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2021-10-15 19:21:32,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:32,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:32,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:34,562 INFO L129 PetriNetUnfolder]: 447/5166 cut-off events. [2021-10-15 19:21:34,562 INFO L130 PetriNetUnfolder]: For 9186/9186 co-relation queries the response was YES. [2021-10-15 19:21:34,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13238 conditions, 5166 events. 447/5166 cut-off events. For 9186/9186 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 39917 event pairs, 0 based on Foata normal form. 1/5167 useless extension candidates. Maximal degree in co-relation 4860. Up to 4343 conditions per place. [2021-10-15 19:21:34,580 INFO L132 encePairwiseOnDemand]: 311/327 looper letters, 539 selfloop transitions, 78 changer transitions 0/623 dead transitions. [2021-10-15 19:21:34,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 623 transitions, 7497 flow [2021-10-15 19:21:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:34,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2021-10-15 19:21:34,583 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.34964322120285424 [2021-10-15 19:21:34,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2021-10-15 19:21:34,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2021-10-15 19:21:34,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:34,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2021-10-15 19:21:34,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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) [2021-10-15 19:21:34,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:34,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:34,588 INFO L186 Difference]: Start difference. First operand has 156 places, 454 transitions, 5364 flow. Second operand 3 states and 343 transitions. [2021-10-15 19:21:34,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 623 transitions, 7497 flow [2021-10-15 19:21:34,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 623 transitions, 7179 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:21:34,625 INFO L242 Difference]: Finished difference. Result has 158 places, 488 transitions, 5969 flow [2021-10-15 19:21:34,626 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=5080, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5969, PETRI_PLACES=158, PETRI_TRANSITIONS=488} [2021-10-15 19:21:34,626 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -37 predicate places. [2021-10-15 19:21:34,627 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 488 transitions, 5969 flow [2021-10-15 19:21:34,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2021-10-15 19:21:34,627 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:34,627 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:21:34,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:34,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 19:21:34,840 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:34,841 INFO L82 PathProgramCache]: Analyzing trace with hash 851501066, now seen corresponding path program 1 times [2021-10-15 19:21:34,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:34,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686648380] [2021-10-15 19:21:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:34,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-10-15 19:21:34,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:34,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686648380] [2021-10-15 19:21:34,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686648380] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:34,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:21:34,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:21:34,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099179732] [2021-10-15 19:21:34,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:21:34,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:21:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:21:34,928 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:34,929 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 488 transitions, 5969 flow. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2021-10-15 19:21:34,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:34,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:34,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:37,127 INFO L129 PetriNetUnfolder]: 426/5145 cut-off events. [2021-10-15 19:21:37,128 INFO L130 PetriNetUnfolder]: For 9357/9357 co-relation queries the response was YES. [2021-10-15 19:21:37,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13081 conditions, 5145 events. 426/5145 cut-off events. For 9357/9357 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 39514 event pairs, 0 based on Foata normal form. 21/5166 useless extension candidates. Maximal degree in co-relation 6024. Up to 3324 conditions per place. [2021-10-15 19:21:37,151 INFO L132 encePairwiseOnDemand]: 291/327 looper letters, 574 selfloop transitions, 149 changer transitions 0/729 dead transitions. [2021-10-15 19:21:37,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 729 transitions, 7721 flow [2021-10-15 19:21:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:21:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:21:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 496 transitions. [2021-10-15 19:21:37,155 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37920489296636084 [2021-10-15 19:21:37,155 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 496 transitions. [2021-10-15 19:21:37,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 496 transitions. [2021-10-15 19:21:37,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:37,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 496 transitions. [2021-10-15 19:21:37,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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) [2021-10-15 19:21:37,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 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) [2021-10-15 19:21:37,162 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 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) [2021-10-15 19:21:37,163 INFO L186 Difference]: Start difference. First operand has 158 places, 488 transitions, 5969 flow. Second operand 4 states and 496 transitions. [2021-10-15 19:21:37,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 729 transitions, 7721 flow [2021-10-15 19:21:37,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 729 transitions, 7539 flow, removed 17 selfloop flow, removed 2 redundant places. [2021-10-15 19:21:37,206 INFO L242 Difference]: Finished difference. Result has 159 places, 475 transitions, 5883 flow [2021-10-15 19:21:37,207 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=5585, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5883, PETRI_PLACES=159, PETRI_TRANSITIONS=475} [2021-10-15 19:21:37,207 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -36 predicate places. [2021-10-15 19:21:37,208 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 475 transitions, 5883 flow [2021-10-15 19:21:37,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2021-10-15 19:21:37,208 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:37,209 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-10-15 19:21:37,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:21:37,209 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:37,210 INFO L82 PathProgramCache]: Analyzing trace with hash 596669353, now seen corresponding path program 1 times [2021-10-15 19:21:37,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:37,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72182592] [2021-10-15 19:21:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:37,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 119 proven. 29 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-15 19:21:37,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:37,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72182592] [2021-10-15 19:21:37,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72182592] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:37,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177318565] [2021-10-15 19:21:37,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:37,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:37,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:37,304 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:37,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:21:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:37,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:21:37,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-15 19:21:38,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177318565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:38,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:38,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:21:38,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488440809] [2021-10-15 19:21:38,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:38,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:38,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:21:38,007 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:38,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 475 transitions, 5883 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2021-10-15 19:21:38,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:38,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:38,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:39,931 INFO L129 PetriNetUnfolder]: 393/5112 cut-off events. [2021-10-15 19:21:39,931 INFO L130 PetriNetUnfolder]: For 9577/9577 co-relation queries the response was YES. [2021-10-15 19:21:39,941 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12855 conditions, 5112 events. 393/5112 cut-off events. For 9577/9577 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 38689 event pairs, 0 based on Foata normal form. 33/5145 useless extension candidates. Maximal degree in co-relation 4364. Up to 3480 conditions per place. [2021-10-15 19:21:39,956 INFO L132 encePairwiseOnDemand]: 306/327 looper letters, 433 selfloop transitions, 130 changer transitions 0/569 dead transitions. [2021-10-15 19:21:39,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 569 transitions, 6681 flow [2021-10-15 19:21:39,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:39,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2021-10-15 19:21:39,959 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3486238532110092 [2021-10-15 19:21:39,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2021-10-15 19:21:39,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2021-10-15 19:21:39,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:39,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2021-10-15 19:21:39,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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) [2021-10-15 19:21:39,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:39,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:39,966 INFO L186 Difference]: Start difference. First operand has 159 places, 475 transitions, 5883 flow. Second operand 3 states and 342 transitions. [2021-10-15 19:21:39,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 569 transitions, 6681 flow [2021-10-15 19:21:39,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 569 transitions, 6560 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:21:40,009 INFO L242 Difference]: Finished difference. Result has 160 places, 442 transitions, 5440 flow [2021-10-15 19:21:40,010 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=5180, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5440, PETRI_PLACES=160, PETRI_TRANSITIONS=442} [2021-10-15 19:21:40,010 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -35 predicate places. [2021-10-15 19:21:40,011 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 442 transitions, 5440 flow [2021-10-15 19:21:40,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2021-10-15 19:21:40,011 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:21:40,012 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 19:21:40,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:40,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:21:40,228 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:21:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:21:40,229 INFO L82 PathProgramCache]: Analyzing trace with hash -158999246, now seen corresponding path program 1 times [2021-10-15 19:21:40,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:21:40,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607310178] [2021-10-15 19:21:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:40,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:21:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 157 proven. 10 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-10-15 19:21:40,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:21:40,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607310178] [2021-10-15 19:21:40,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607310178] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:21:40,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297042614] [2021-10-15 19:21:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:21:40,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:21:40,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:21:40,352 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:21:40,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:21:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:21:40,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:21:40,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:21:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-10-15 19:21:41,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297042614] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:21:41,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:21:41,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:21:41,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564016578] [2021-10-15 19:21:41,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:21:41,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:21:41,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:21:41,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:21:41,451 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:21:41,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 442 transitions, 5440 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2021-10-15 19:21:41,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:21:41,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:21:41,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:21:43,159 INFO L129 PetriNetUnfolder]: 296/4620 cut-off events. [2021-10-15 19:21:43,159 INFO L130 PetriNetUnfolder]: For 7664/7664 co-relation queries the response was YES. [2021-10-15 19:21:43,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11247 conditions, 4620 events. 296/4620 cut-off events. For 7664/7664 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 33454 event pairs, 0 based on Foata normal form. 55/4675 useless extension candidates. Maximal degree in co-relation 4772. Up to 2887 conditions per place. [2021-10-15 19:21:43,168 INFO L132 encePairwiseOnDemand]: 294/327 looper letters, 0 selfloop transitions, 0 changer transitions 500/500 dead transitions. [2021-10-15 19:21:43,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 500 transitions, 5520 flow [2021-10-15 19:21:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:21:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:21:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2021-10-15 19:21:43,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3527013251783894 [2021-10-15 19:21:43,175 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2021-10-15 19:21:43,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2021-10-15 19:21:43,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:21:43,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2021-10-15 19:21:43,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 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) [2021-10-15 19:21:43,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:43,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2021-10-15 19:21:43,180 INFO L186 Difference]: Start difference. First operand has 160 places, 442 transitions, 5440 flow. Second operand 3 states and 346 transitions. [2021-10-15 19:21:43,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 500 transitions, 5520 flow [2021-10-15 19:21:43,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 500 transitions, 5327 flow, removed 49 selfloop flow, removed 1 redundant places. [2021-10-15 19:21:43,209 INFO L242 Difference]: Finished difference. Result has 159 places, 0 transitions, 0 flow [2021-10-15 19:21:43,209 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=4083, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=159, PETRI_TRANSITIONS=0} [2021-10-15 19:21:43,210 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -36 predicate places. [2021-10-15 19:21:43,210 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 0 transitions, 0 flow [2021-10-15 19:21:43,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2021-10-15 19:21:43,212 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:21:43,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:21:43,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:21:43,444 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:21:43,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:21:43 BoogieIcfgContainer [2021-10-15 19:21:43,449 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:21:43,450 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:21:43,450 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:21:43,450 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:21:43,451 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:21:14" (3/4) ... [2021-10-15 19:21:43,453 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:21:43,476 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:21:43,478 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:21:43,493 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:21:43,494 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:21:43,620 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:21:43,620 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:21:43,622 INFO L168 Benchmark]: Toolchain (without parser) took 31275.38 ms. Allocated memory was 94.4 MB in the beginning and 625.0 MB in the end (delta: 530.6 MB). Free memory was 58.1 MB in the beginning and 291.4 MB in the end (delta: -233.3 MB). Peak memory consumption was 296.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:43,622 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 94.4 MB. Free memory was 65.9 MB in the beginning and 65.9 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:21:43,623 INFO L168 Benchmark]: CACSL2BoogieTranslator took 677.15 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 57.8 MB in the beginning and 79.3 MB in the end (delta: -21.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:43,623 INFO L168 Benchmark]: Boogie Procedure Inliner took 98.02 ms. Allocated memory is still 119.5 MB. Free memory was 78.6 MB in the beginning and 73.0 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:43,623 INFO L168 Benchmark]: Boogie Preprocessor took 130.81 ms. Allocated memory is still 119.5 MB. Free memory was 73.0 MB in the beginning and 68.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:43,624 INFO L168 Benchmark]: RCFGBuilder took 1373.73 ms. Allocated memory is still 119.5 MB. Free memory was 68.8 MB in the beginning and 65.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 33.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:43,624 INFO L168 Benchmark]: TraceAbstraction took 28819.02 ms. Allocated memory was 119.5 MB in the beginning and 625.0 MB in the end (delta: 505.4 MB). Free memory was 65.2 MB in the beginning and 306.2 MB in the end (delta: -241.0 MB). Peak memory consumption was 265.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:43,625 INFO L168 Benchmark]: Witness Printer took 170.14 ms. Allocated memory is still 625.0 MB. Free memory was 306.2 MB in the beginning and 291.4 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:21:43,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 94.4 MB. Free memory was 65.9 MB in the beginning and 65.9 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 677.15 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 57.8 MB in the beginning and 79.3 MB in the end (delta: -21.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 98.02 ms. Allocated memory is still 119.5 MB. Free memory was 78.6 MB in the beginning and 73.0 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 130.81 ms. Allocated memory is still 119.5 MB. Free memory was 73.0 MB in the beginning and 68.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1373.73 ms. Allocated memory is still 119.5 MB. Free memory was 68.8 MB in the beginning and 65.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 33.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 28819.02 ms. Allocated memory was 119.5 MB in the beginning and 625.0 MB in the end (delta: 505.4 MB). Free memory was 65.2 MB in the beginning and 306.2 MB in the end (delta: -241.0 MB). Peak memory consumption was 265.2 MB. Max. memory is 16.1 GB. * Witness Printer took 170.14 ms. Allocated memory is still 625.0 MB. Free memory was 306.2 MB in the beginning and 291.4 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 468]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 198 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 37.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 28725.6ms, OverallIterations: 14, TraceHistogramMax: 6, EmptinessCheckTime: 0.0ms, AutomataDifference: 20938.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 166.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1075 SDtfs, 1533 SDslu, 0 SDs, 0 SdLazy, 4808 SolverSat, 607 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4796.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1079 GetRequests, 1052 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5969occurred in iteration=11, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 265.5ms SsaConstructionTime, 762.2ms SatisfiabilityAnalysisTime, 3967.2ms InterpolantComputationTime, 3063 NumberOfCodeBlocks, 3063 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 3043 ConstructedInterpolants, 0 QuantifiedInterpolants, 5794 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2296 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 20 InterpolantComputations, 14 PerfectInterpolantSequences, 2239/2302 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:21:43,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_022dea53-df2d-44d3-8179-fd665d1bd0fc/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...