./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem15_label53.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_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/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_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label53.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/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_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/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 2fb75a84d1c7fa6d4b9a83044dc9217028394d23 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 19:27:04,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:27:04,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:27:04,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:27:04,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:27:04,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:27:04,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:27:04,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:27:04,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:27:04,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:27:04,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:27:04,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:27:04,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:27:04,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:27:04,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:27:04,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:27:04,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:27:04,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:27:04,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:27:04,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:27:04,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:27:04,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:27:04,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:27:04,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:27:04,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:27:04,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:27:04,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:27:04,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:27:04,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:27:04,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:27:04,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:27:04,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:27:04,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:27:04,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:27:04,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:27:04,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:27:04,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:27:04,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:27:04,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:27:04,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:27:04,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:27:04,282 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:27:04,323 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:27:04,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:27:04,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:27:04,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:27:04,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:27:04,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:27:04,326 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:27:04,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:27:04,326 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:27:04,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:27:04,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:27:04,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:27:04,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:27:04,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:27:04,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:27:04,329 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:27:04,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:27:04,329 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:27:04,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:27:04,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:27:04,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:27:04,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:27:04,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:27:04,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:27:04,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:27:04,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:27:04,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:27:04,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:27:04,332 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:27:04,332 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:27:04,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:27:04,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:27:04,333 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_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2fb75a84d1c7fa6d4b9a83044dc9217028394d23 [2021-10-15 19:27:04,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:27:04,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:27:04,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:27:04,648 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:27:04,649 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:27:04,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem15_label53.c [2021-10-15 19:27:04,752 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3/data/d781cd795/fddc7854bc1a427f9c2bc9a41ea0a32c/FLAG38d7e0c29 [2021-10-15 19:27:05,435 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:27:05,436 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/sv-benchmarks/c/eca-rers2012/Problem15_label53.c [2021-10-15 19:27:05,460 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3/data/d781cd795/fddc7854bc1a427f9c2bc9a41ea0a32c/FLAG38d7e0c29 [2021-10-15 19:27:05,631 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3/data/d781cd795/fddc7854bc1a427f9c2bc9a41ea0a32c [2021-10-15 19:27:05,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:27:05,636 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:27:05,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:27:05,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:27:05,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:27:05,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:27:05" (1/1) ... [2021-10-15 19:27:05,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78235ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:05, skipping insertion in model container [2021-10-15 19:27:05,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:27:05" (1/1) ... [2021-10-15 19:27:05,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:27:05,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:27:06,053 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_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/sv-benchmarks/c/eca-rers2012/Problem15_label53.c[5826,5839] [2021-10-15 19:27:06,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:27:06,540 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:27:06,564 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_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/sv-benchmarks/c/eca-rers2012/Problem15_label53.c[5826,5839] [2021-10-15 19:27:06,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:27:06,828 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:27:06,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:06 WrapperNode [2021-10-15 19:27:06,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:27:06,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:27:06,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:27:06,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:27:06,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:06" (1/1) ... [2021-10-15 19:27:06,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:06" (1/1) ... [2021-10-15 19:27:07,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:27:07,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:27:07,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:27:07,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:27:07,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:06" (1/1) ... [2021-10-15 19:27:07,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:06" (1/1) ... [2021-10-15 19:27:07,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:06" (1/1) ... [2021-10-15 19:27:07,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:06" (1/1) ... [2021-10-15 19:27:07,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:06" (1/1) ... [2021-10-15 19:27:07,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:06" (1/1) ... [2021-10-15 19:27:07,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:06" (1/1) ... [2021-10-15 19:27:07,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:27:07,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:27:07,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:27:07,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:27:07,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:06" (1/1) ... [2021-10-15 19:27:07,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:27:07,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:27:07,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:27:07,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:27:07,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:27:07,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:27:07,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:27:07,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:27:10,499 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:27:10,502 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-15 19:27:10,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:27:10 BoogieIcfgContainer [2021-10-15 19:27:10,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:27:10,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:27:10,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:27:10,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:27:10,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:27:05" (1/3) ... [2021-10-15 19:27:10,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360b5c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:27:10, skipping insertion in model container [2021-10-15 19:27:10,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:27:06" (2/3) ... [2021-10-15 19:27:10,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360b5c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:27:10, skipping insertion in model container [2021-10-15 19:27:10,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:27:10" (3/3) ... [2021-10-15 19:27:10,516 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label53.c [2021-10-15 19:27:10,522 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:27:10,522 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:27:10,581 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:27:10,590 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 19:27:10,590 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:27:10,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 424 places, 750 transitions, 1500 flow [2021-10-15 19:27:10,816 INFO L129 PetriNetUnfolder]: 327/750 cut-off events. [2021-10-15 19:27:10,816 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:27:10,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 750 events. 327/750 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 522 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 0. Up to 221 conditions per place. [2021-10-15 19:27:10,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 424 places, 750 transitions, 1500 flow [2021-10-15 19:27:10,840 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 421 places, 745 transitions, 1490 flow [2021-10-15 19:27:10,857 INFO L129 PetriNetUnfolder]: 42/130 cut-off events. [2021-10-15 19:27:10,857 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:27:10,858 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:27:10,858 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] [2021-10-15 19:27:10,859 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:27:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:10,864 INFO L82 PathProgramCache]: Analyzing trace with hash 433832817, now seen corresponding path program 1 times [2021-10-15 19:27:10,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:10,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044381092] [2021-10-15 19:27:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:10,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:11,218 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 19:27:11,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:11,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044381092] [2021-10-15 19:27:11,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044381092] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:11,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:11,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:27:11,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351281826] [2021-10-15 19:27:11,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:27:11,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:11,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:27:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:27:11,256 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 750 [2021-10-15 19:27:11,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 745 transitions, 1490 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 19:27:11,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:27:11,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 750 [2021-10-15 19:27:11,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:27:14,162 INFO L129 PetriNetUnfolder]: 321/1046 cut-off events. [2021-10-15 19:27:14,162 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:27:14,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2040 conditions, 1046 events. 321/1046 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1254 event pairs, 0 based on Foata normal form. 62/739 useless extension candidates. Maximal degree in co-relation 2. Up to 670 conditions per place. [2021-10-15 19:27:14,175 INFO L132 encePairwiseOnDemand]: 399/750 looper letters, 867 selfloop transitions, 64 changer transitions 61/1039 dead transitions. [2021-10-15 19:27:14,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 1039 transitions, 4062 flow [2021-10-15 19:27:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:27:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:27:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1444 transitions. [2021-10-15 19:27:14,197 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6417777777777778 [2021-10-15 19:27:14,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1444 transitions. [2021-10-15 19:27:14,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1444 transitions. [2021-10-15 19:27:14,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:27:14,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1444 transitions. [2021-10-15 19:27:14,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 481.3333333333333) internal successors, (1444), 3 states have internal predecessors, (1444), 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 19:27:14,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:14,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:14,238 INFO L186 Difference]: Start difference. First operand has 421 places, 745 transitions, 1490 flow. Second operand 3 states and 1444 transitions. [2021-10-15 19:27:14,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 1039 transitions, 4062 flow [2021-10-15 19:27:14,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1039 transitions, 4062 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:27:14,275 INFO L242 Difference]: Finished difference. Result has 424 places, 672 transitions, 1966 flow [2021-10-15 19:27:14,278 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1966, PETRI_PLACES=424, PETRI_TRANSITIONS=672} [2021-10-15 19:27:14,279 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, 3 predicate places. [2021-10-15 19:27:14,280 INFO L470 AbstractCegarLoop]: Abstraction has has 424 places, 672 transitions, 1966 flow [2021-10-15 19:27:14,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 19:27:14,280 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:27:14,281 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 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] [2021-10-15 19:27:14,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:27:14,282 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:27:14,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:14,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1438862921, now seen corresponding path program 1 times [2021-10-15 19:27:14,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:14,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101295952] [2021-10-15 19:27:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:14,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:14,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:14,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101295952] [2021-10-15 19:27:14,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101295952] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:14,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:14,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:27:14,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973010862] [2021-10-15 19:27:14,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:27:14,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:14,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:27:14,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:27:14,452 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 750 [2021-10-15 19:27:14,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 672 transitions, 1966 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 19:27:14,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:27:14,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 750 [2021-10-15 19:27:14,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:27:16,911 INFO L129 PetriNetUnfolder]: 351/1315 cut-off events. [2021-10-15 19:27:16,911 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-10-15 19:27:16,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 1315 events. 351/1315 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1931 event pairs, 0 based on Foata normal form. 19/1282 useless extension candidates. Maximal degree in co-relation 1390. Up to 969 conditions per place. [2021-10-15 19:27:16,922 INFO L132 encePairwiseOnDemand]: 694/750 looper letters, 927 selfloop transitions, 31 changer transitions 0/998 dead transitions. [2021-10-15 19:27:16,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 998 transitions, 4609 flow [2021-10-15 19:27:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:27:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:27:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1062 transitions. [2021-10-15 19:27:16,928 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.472 [2021-10-15 19:27:16,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1062 transitions. [2021-10-15 19:27:16,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1062 transitions. [2021-10-15 19:27:16,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:27:16,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1062 transitions. [2021-10-15 19:27:16,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 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 19:27:16,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:16,942 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:16,943 INFO L186 Difference]: Start difference. First operand has 424 places, 672 transitions, 1966 flow. Second operand 3 states and 1062 transitions. [2021-10-15 19:27:16,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 998 transitions, 4609 flow [2021-10-15 19:27:16,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 998 transitions, 4520 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:27:16,982 INFO L242 Difference]: Finished difference. Result has 366 places, 702 transitions, 2215 flow [2021-10-15 19:27:16,983 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2215, PETRI_PLACES=366, PETRI_TRANSITIONS=702} [2021-10-15 19:27:16,984 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -55 predicate places. [2021-10-15 19:27:16,984 INFO L470 AbstractCegarLoop]: Abstraction has has 366 places, 702 transitions, 2215 flow [2021-10-15 19:27:16,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 19:27:16,985 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:27:16,986 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 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] [2021-10-15 19:27:16,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:27:16,986 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:27:16,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:16,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2089662630, now seen corresponding path program 1 times [2021-10-15 19:27:16,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:16,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475879445] [2021-10-15 19:27:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:16,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:17,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:17,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475879445] [2021-10-15 19:27:17,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475879445] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:17,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:17,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:27:17,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983906770] [2021-10-15 19:27:17,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:27:17,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:27:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:27:17,139 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 750 [2021-10-15 19:27:17,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 702 transitions, 2215 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 19:27:17,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:27:17,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 750 [2021-10-15 19:27:17,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:27:19,734 INFO L129 PetriNetUnfolder]: 401/1969 cut-off events. [2021-10-15 19:27:19,735 INFO L130 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2021-10-15 19:27:19,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4330 conditions, 1969 events. 401/1969 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3541 event pairs, 0 based on Foata normal form. 238/2179 useless extension candidates. Maximal degree in co-relation 2852. Up to 1062 conditions per place. [2021-10-15 19:27:19,747 INFO L132 encePairwiseOnDemand]: 502/750 looper letters, 841 selfloop transitions, 163 changer transitions 0/1045 dead transitions. [2021-10-15 19:27:19,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1045 transitions, 4961 flow [2021-10-15 19:27:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:27:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:27:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1249 transitions. [2021-10-15 19:27:19,753 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5551111111111111 [2021-10-15 19:27:19,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1249 transitions. [2021-10-15 19:27:19,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1249 transitions. [2021-10-15 19:27:19,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:27:19,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1249 transitions. [2021-10-15 19:27:19,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 416.3333333333333) internal successors, (1249), 3 states have internal predecessors, (1249), 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 19:27:19,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:19,767 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:19,767 INFO L186 Difference]: Start difference. First operand has 366 places, 702 transitions, 2215 flow. Second operand 3 states and 1249 transitions. [2021-10-15 19:27:19,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1045 transitions, 4961 flow [2021-10-15 19:27:19,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1045 transitions, 4944 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:27:19,810 INFO L242 Difference]: Finished difference. Result has 369 places, 748 transitions, 3384 flow [2021-10-15 19:27:19,812 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=2074, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3384, PETRI_PLACES=369, PETRI_TRANSITIONS=748} [2021-10-15 19:27:19,812 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -52 predicate places. [2021-10-15 19:27:19,812 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 748 transitions, 3384 flow [2021-10-15 19:27:19,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 19:27:19,813 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:27:19,813 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-10-15 19:27:19,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:27:19,814 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:27:19,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:19,814 INFO L82 PathProgramCache]: Analyzing trace with hash 864549314, now seen corresponding path program 1 times [2021-10-15 19:27:19,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:19,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41973711] [2021-10-15 19:27:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:19,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:19,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:19,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41973711] [2021-10-15 19:27:19,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41973711] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:19,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:19,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:27:19,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851481943] [2021-10-15 19:27:19,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:27:19,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:19,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:27:19,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:27:19,950 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 750 [2021-10-15 19:27:19,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 748 transitions, 3384 flow. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 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 19:27:19,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:27:19,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 750 [2021-10-15 19:27:19,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:27:25,311 INFO L129 PetriNetUnfolder]: 826/4239 cut-off events. [2021-10-15 19:27:25,311 INFO L130 PetriNetUnfolder]: For 2299/2299 co-relation queries the response was YES. [2021-10-15 19:27:25,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10396 conditions, 4239 events. 826/4239 cut-off events. For 2299/2299 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 16426 event pairs, 0 based on Foata normal form. 292/4491 useless extension candidates. Maximal degree in co-relation 7683. Up to 1666 conditions per place. [2021-10-15 19:27:25,336 INFO L132 encePairwiseOnDemand]: 492/750 looper letters, 1295 selfloop transitions, 449 changer transitions 0/1784 dead transitions. [2021-10-15 19:27:25,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1784 transitions, 10950 flow [2021-10-15 19:27:25,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:27:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:27:25,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1878 transitions. [2021-10-15 19:27:25,343 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.626 [2021-10-15 19:27:25,343 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1878 transitions. [2021-10-15 19:27:25,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1878 transitions. [2021-10-15 19:27:25,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:27:25,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1878 transitions. [2021-10-15 19:27:25,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 469.5) internal successors, (1878), 4 states have internal predecessors, (1878), 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 19:27:25,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 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 19:27:25,361 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 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 19:27:25,361 INFO L186 Difference]: Start difference. First operand has 369 places, 748 transitions, 3384 flow. Second operand 4 states and 1878 transitions. [2021-10-15 19:27:25,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1784 transitions, 10950 flow [2021-10-15 19:27:25,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1784 transitions, 10046 flow, removed 111 selfloop flow, removed 2 redundant places. [2021-10-15 19:27:25,428 INFO L242 Difference]: Finished difference. Result has 373 places, 1140 transitions, 7780 flow [2021-10-15 19:27:25,429 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=7780, PETRI_PLACES=373, PETRI_TRANSITIONS=1140} [2021-10-15 19:27:25,429 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -48 predicate places. [2021-10-15 19:27:25,429 INFO L470 AbstractCegarLoop]: Abstraction has has 373 places, 1140 transitions, 7780 flow [2021-10-15 19:27:25,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 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 19:27:25,430 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:27:25,431 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-10-15 19:27:25,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:27:25,431 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:27:25,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:25,432 INFO L82 PathProgramCache]: Analyzing trace with hash 154363468, now seen corresponding path program 1 times [2021-10-15 19:27:25,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:25,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979898141] [2021-10-15 19:27:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:25,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-10-15 19:27:25,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:25,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979898141] [2021-10-15 19:27:25,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979898141] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:25,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:25,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:27:25,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963093888] [2021-10-15 19:27:25,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:27:25,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:25,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:27:25,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:27:25,575 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 750 [2021-10-15 19:27:25,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 1140 transitions, 7780 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 19:27:25,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:27:25,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 750 [2021-10-15 19:27:25,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:27:30,371 INFO L129 PetriNetUnfolder]: 945/6453 cut-off events. [2021-10-15 19:27:30,372 INFO L130 PetriNetUnfolder]: For 6538/6538 co-relation queries the response was YES. [2021-10-15 19:27:30,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16076 conditions, 6453 events. 945/6453 cut-off events. For 6538/6538 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 31929 event pairs, 0 based on Foata normal form. 480/6916 useless extension candidates. Maximal degree in co-relation 12238. Up to 3746 conditions per place. [2021-10-15 19:27:30,399 INFO L132 encePairwiseOnDemand]: 553/750 looper letters, 1146 selfloop transitions, 309 changer transitions 0/1543 dead transitions. [2021-10-15 19:27:30,399 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1543 transitions, 12270 flow [2021-10-15 19:27:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:27:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:27:30,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1304 transitions. [2021-10-15 19:27:30,404 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5795555555555556 [2021-10-15 19:27:30,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1304 transitions. [2021-10-15 19:27:30,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1304 transitions. [2021-10-15 19:27:30,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:27:30,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1304 transitions. [2021-10-15 19:27:30,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 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 19:27:30,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:30,418 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:30,418 INFO L186 Difference]: Start difference. First operand has 373 places, 1140 transitions, 7780 flow. Second operand 3 states and 1304 transitions. [2021-10-15 19:27:30,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1543 transitions, 12270 flow [2021-10-15 19:27:30,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1543 transitions, 12246 flow, removed 12 selfloop flow, removed 0 redundant places. [2021-10-15 19:27:30,514 INFO L242 Difference]: Finished difference. Result has 376 places, 1090 transitions, 8529 flow [2021-10-15 19:27:30,516 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=6906, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8529, PETRI_PLACES=376, PETRI_TRANSITIONS=1090} [2021-10-15 19:27:30,516 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -45 predicate places. [2021-10-15 19:27:30,516 INFO L470 AbstractCegarLoop]: Abstraction has has 376 places, 1090 transitions, 8529 flow [2021-10-15 19:27:30,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 19:27:30,517 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:27:30,518 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:27:30,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:27:30,518 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:27:30,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:30,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1951907684, now seen corresponding path program 1 times [2021-10-15 19:27:30,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:30,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639565215] [2021-10-15 19:27:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:30,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-15 19:27:30,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:30,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639565215] [2021-10-15 19:27:30,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639565215] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:30,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:30,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:27:30,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111720975] [2021-10-15 19:27:30,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:27:30,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:27:30,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:27:30,711 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 750 [2021-10-15 19:27:30,712 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 1090 transitions, 8529 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 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 19:27:30,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:27:30,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 750 [2021-10-15 19:27:30,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:27:35,420 INFO L129 PetriNetUnfolder]: 939/6447 cut-off events. [2021-10-15 19:27:35,420 INFO L130 PetriNetUnfolder]: For 7140/7140 co-relation queries the response was YES. [2021-10-15 19:27:35,424 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16643 conditions, 6447 events. 939/6447 cut-off events. For 7140/7140 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 30435 event pairs, 0 based on Foata normal form. 6/6433 useless extension candidates. Maximal degree in co-relation 8666. Up to 6026 conditions per place. [2021-10-15 19:27:35,444 INFO L132 encePairwiseOnDemand]: 737/750 looper letters, 1336 selfloop transitions, 7 changer transitions 0/1379 dead transitions. [2021-10-15 19:27:35,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1379 transitions, 11761 flow [2021-10-15 19:27:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:27:35,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:27:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1012 transitions. [2021-10-15 19:27:35,448 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4497777777777778 [2021-10-15 19:27:35,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1012 transitions. [2021-10-15 19:27:35,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1012 transitions. [2021-10-15 19:27:35,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:27:35,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1012 transitions. [2021-10-15 19:27:35,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.3333333333333) internal successors, (1012), 3 states have internal predecessors, (1012), 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 19:27:35,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:35,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:35,461 INFO L186 Difference]: Start difference. First operand has 376 places, 1090 transitions, 8529 flow. Second operand 3 states and 1012 transitions. [2021-10-15 19:27:35,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1379 transitions, 11761 flow [2021-10-15 19:27:35,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1379 transitions, 11452 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:27:35,540 INFO L242 Difference]: Finished difference. Result has 377 places, 1084 transitions, 8190 flow [2021-10-15 19:27:35,542 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=8176, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1077, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8190, PETRI_PLACES=377, PETRI_TRANSITIONS=1084} [2021-10-15 19:27:35,543 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -44 predicate places. [2021-10-15 19:27:35,543 INFO L470 AbstractCegarLoop]: Abstraction has has 377 places, 1084 transitions, 8190 flow [2021-10-15 19:27:35,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 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 19:27:35,544 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:27:35,544 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:27:35,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:27:35,545 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:27:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:35,545 INFO L82 PathProgramCache]: Analyzing trace with hash 544636501, now seen corresponding path program 1 times [2021-10-15 19:27:35,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:35,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232683028] [2021-10-15 19:27:35,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:35,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-10-15 19:27:35,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:35,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232683028] [2021-10-15 19:27:35,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232683028] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:35,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:35,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:27:35,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768154058] [2021-10-15 19:27:35,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:27:35,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:35,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:27:35,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:27:35,698 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 750 [2021-10-15 19:27:35,698 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1084 transitions, 8190 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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 19:27:35,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:27:35,699 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 750 [2021-10-15 19:27:35,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:27:41,491 INFO L129 PetriNetUnfolder]: 1119/7823 cut-off events. [2021-10-15 19:27:41,491 INFO L130 PetriNetUnfolder]: For 9260/9260 co-relation queries the response was YES. [2021-10-15 19:27:41,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19948 conditions, 7823 events. 1119/7823 cut-off events. For 9260/9260 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 41917 event pairs, 0 based on Foata normal form. 290/8100 useless extension candidates. Maximal degree in co-relation 11212. Up to 4224 conditions per place. [2021-10-15 19:27:41,522 INFO L132 encePairwiseOnDemand]: 508/750 looper letters, 1134 selfloop transitions, 293 changer transitions 0/1488 dead transitions. [2021-10-15 19:27:41,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 1488 transitions, 12680 flow [2021-10-15 19:27:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:27:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:27:41,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1257 transitions. [2021-10-15 19:27:41,528 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5586666666666666 [2021-10-15 19:27:41,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1257 transitions. [2021-10-15 19:27:41,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1257 transitions. [2021-10-15 19:27:41,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:27:41,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1257 transitions. [2021-10-15 19:27:41,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 419.0) internal successors, (1257), 3 states have internal predecessors, (1257), 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 19:27:41,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:41,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:41,540 INFO L186 Difference]: Start difference. First operand has 377 places, 1084 transitions, 8190 flow. Second operand 3 states and 1257 transitions. [2021-10-15 19:27:41,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 1488 transitions, 12680 flow [2021-10-15 19:27:41,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1488 transitions, 12666 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:27:41,650 INFO L242 Difference]: Finished difference. Result has 379 places, 1193 transitions, 11108 flow [2021-10-15 19:27:41,652 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=8176, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=11108, PETRI_PLACES=379, PETRI_TRANSITIONS=1193} [2021-10-15 19:27:41,652 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -42 predicate places. [2021-10-15 19:27:41,652 INFO L470 AbstractCegarLoop]: Abstraction has has 379 places, 1193 transitions, 11108 flow [2021-10-15 19:27:41,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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 19:27:41,653 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:27:41,654 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:27:41,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:27:41,654 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:27:41,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:41,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1192256238, now seen corresponding path program 1 times [2021-10-15 19:27:41,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:41,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216781828] [2021-10-15 19:27:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:41,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-15 19:27:41,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:41,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216781828] [2021-10-15 19:27:41,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216781828] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:41,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:41,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:27:41,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965631024] [2021-10-15 19:27:41,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:27:41,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:41,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:27:41,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:27:41,949 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 750 [2021-10-15 19:27:41,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1193 transitions, 11108 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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 19:27:41,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:27:41,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 750 [2021-10-15 19:27:41,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:27:50,283 INFO L129 PetriNetUnfolder]: 1243/11239 cut-off events. [2021-10-15 19:27:50,283 INFO L130 PetriNetUnfolder]: For 19498/19498 co-relation queries the response was YES. [2021-10-15 19:27:50,293 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28762 conditions, 11239 events. 1243/11239 cut-off events. For 19498/19498 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 73657 event pairs, 0 based on Foata normal form. 530/11758 useless extension candidates. Maximal degree in co-relation 21087. Up to 7081 conditions per place. [2021-10-15 19:27:50,320 INFO L132 encePairwiseOnDemand]: 504/750 looper letters, 986 selfloop transitions, 351 changer transitions 206/1604 dead transitions. [2021-10-15 19:27:50,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1604 transitions, 16268 flow [2021-10-15 19:27:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:27:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:27:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1257 transitions. [2021-10-15 19:27:50,325 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5586666666666666 [2021-10-15 19:27:50,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1257 transitions. [2021-10-15 19:27:50,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1257 transitions. [2021-10-15 19:27:50,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:27:50,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1257 transitions. [2021-10-15 19:27:50,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 419.0) internal successors, (1257), 3 states have internal predecessors, (1257), 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 19:27:50,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:50,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:27:50,337 INFO L186 Difference]: Start difference. First operand has 379 places, 1193 transitions, 11108 flow. Second operand 3 states and 1257 transitions. [2021-10-15 19:27:50,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1604 transitions, 16268 flow [2021-10-15 19:27:50,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1604 transitions, 15666 flow, removed 8 selfloop flow, removed 2 redundant places. [2021-10-15 19:27:50,465 INFO L242 Difference]: Finished difference. Result has 381 places, 1103 transitions, 11328 flow [2021-10-15 19:27:50,466 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=10502, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=11328, PETRI_PLACES=381, PETRI_TRANSITIONS=1103} [2021-10-15 19:27:50,467 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -40 predicate places. [2021-10-15 19:27:50,467 INFO L470 AbstractCegarLoop]: Abstraction has has 381 places, 1103 transitions, 11328 flow [2021-10-15 19:27:50,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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 19:27:50,468 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:27:50,468 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:27:50,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:27:50,469 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:27:50,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:50,469 INFO L82 PathProgramCache]: Analyzing trace with hash -330853813, now seen corresponding path program 1 times [2021-10-15 19:27:50,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:50,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179107712] [2021-10-15 19:27:50,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:50,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:27:50,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:50,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179107712] [2021-10-15 19:27:50,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179107712] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:50,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:50,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:27:50,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857738166] [2021-10-15 19:27:50,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:27:50,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:27:50,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:27:50,688 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 750 [2021-10-15 19:27:50,690 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 1103 transitions, 11328 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 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 19:27:50,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:27:50,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 750 [2021-10-15 19:27:50,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:00,160 INFO L129 PetriNetUnfolder]: 1128/13236 cut-off events. [2021-10-15 19:28:00,160 INFO L130 PetriNetUnfolder]: For 27426/27426 co-relation queries the response was YES. [2021-10-15 19:28:00,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33097 conditions, 13236 events. 1128/13236 cut-off events. For 27426/27426 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 94359 event pairs, 0 based on Foata normal form. 560/13779 useless extension candidates. Maximal degree in co-relation 26819. Up to 8983 conditions per place. [2021-10-15 19:28:00,206 INFO L132 encePairwiseOnDemand]: 551/750 looper letters, 1196 selfloop transitions, 242 changer transitions 18/1496 dead transitions. [2021-10-15 19:28:00,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1496 transitions, 16110 flow [2021-10-15 19:28:00,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:28:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:28:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1141 transitions. [2021-10-15 19:28:00,211 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5071111111111111 [2021-10-15 19:28:00,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1141 transitions. [2021-10-15 19:28:00,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1141 transitions. [2021-10-15 19:28:00,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:00,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1141 transitions. [2021-10-15 19:28:00,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 380.3333333333333) internal successors, (1141), 3 states have internal predecessors, (1141), 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 19:28:00,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:28:00,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:28:00,479 INFO L186 Difference]: Start difference. First operand has 381 places, 1103 transitions, 11328 flow. Second operand 3 states and 1141 transitions. [2021-10-15 19:28:00,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1496 transitions, 16110 flow [2021-10-15 19:28:00,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1496 transitions, 15088 flow, removed 144 selfloop flow, removed 2 redundant places. [2021-10-15 19:28:00,647 INFO L242 Difference]: Finished difference. Result has 383 places, 1177 transitions, 13116 flow [2021-10-15 19:28:00,649 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=9926, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1069, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=13116, PETRI_PLACES=383, PETRI_TRANSITIONS=1177} [2021-10-15 19:28:00,649 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -38 predicate places. [2021-10-15 19:28:00,650 INFO L470 AbstractCegarLoop]: Abstraction has has 383 places, 1177 transitions, 13116 flow [2021-10-15 19:28:00,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 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 19:28:00,650 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:00,651 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:28:00,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:28:00,652 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1911528904, now seen corresponding path program 1 times [2021-10-15 19:28:00,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:00,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615014299] [2021-10-15 19:28:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:00,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-10-15 19:28:00,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:00,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615014299] [2021-10-15 19:28:00,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615014299] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:28:00,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:28:00,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:28:00,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313001675] [2021-10-15 19:28:00,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:28:00,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:00,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:28:00,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:28:00,931 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 750 [2021-10-15 19:28:00,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1177 transitions, 13116 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 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 19:28:00,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:00,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 750 [2021-10-15 19:28:00,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:14,864 INFO L129 PetriNetUnfolder]: 1288/16392 cut-off events. [2021-10-15 19:28:14,864 INFO L130 PetriNetUnfolder]: For 33754/33754 co-relation queries the response was YES. [2021-10-15 19:28:14,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41025 conditions, 16392 events. 1288/16392 cut-off events. For 33754/33754 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 118907 event pairs, 0 based on Foata normal form. 483/16863 useless extension candidates. Maximal degree in co-relation 34585. Up to 12600 conditions per place. [2021-10-15 19:28:14,921 INFO L132 encePairwiseOnDemand]: 545/750 looper letters, 1260 selfloop transitions, 291 changer transitions 0/1591 dead transitions. [2021-10-15 19:28:14,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1591 transitions, 18612 flow [2021-10-15 19:28:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:28:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:28:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1134 transitions. [2021-10-15 19:28:14,928 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.504 [2021-10-15 19:28:14,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1134 transitions. [2021-10-15 19:28:14,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1134 transitions. [2021-10-15 19:28:14,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:14,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1134 transitions. [2021-10-15 19:28:14,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 378.0) internal successors, (1134), 3 states have internal predecessors, (1134), 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 19:28:14,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:28:14,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:28:14,941 INFO L186 Difference]: Start difference. First operand has 383 places, 1177 transitions, 13116 flow. Second operand 3 states and 1134 transitions. [2021-10-15 19:28:14,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1591 transitions, 18612 flow [2021-10-15 19:28:15,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1591 transitions, 18120 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:28:15,101 INFO L242 Difference]: Finished difference. Result has 385 places, 1293 transitions, 16392 flow [2021-10-15 19:28:15,104 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=12456, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=873, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=16392, PETRI_PLACES=385, PETRI_TRANSITIONS=1293} [2021-10-15 19:28:15,104 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -36 predicate places. [2021-10-15 19:28:15,105 INFO L470 AbstractCegarLoop]: Abstraction has has 385 places, 1293 transitions, 16392 flow [2021-10-15 19:28:15,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 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 19:28:15,105 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:15,106 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:28:15,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:28:15,107 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:15,108 INFO L82 PathProgramCache]: Analyzing trace with hash 25263887, now seen corresponding path program 1 times [2021-10-15 19:28:15,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:15,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418348562] [2021-10-15 19:28:15,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:15,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-10-15 19:28:15,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:15,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418348562] [2021-10-15 19:28:15,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418348562] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:28:15,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:28:15,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:28:15,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839334945] [2021-10-15 19:28:15,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:28:15,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:15,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:28:15,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:28:15,389 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 750 [2021-10-15 19:28:15,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1293 transitions, 16392 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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 19:28:15,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:15,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 750 [2021-10-15 19:28:15,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:31,089 INFO L129 PetriNetUnfolder]: 1326/16727 cut-off events. [2021-10-15 19:28:31,089 INFO L130 PetriNetUnfolder]: For 31740/31740 co-relation queries the response was YES. [2021-10-15 19:28:31,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43000 conditions, 16727 events. 1326/16727 cut-off events. For 31740/31740 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 121093 event pairs, 0 based on Foata normal form. 1/16719 useless extension candidates. Maximal degree in co-relation 36488. Up to 16085 conditions per place. [2021-10-15 19:28:31,140 INFO L132 encePairwiseOnDemand]: 700/750 looper letters, 1477 selfloop transitions, 49 changer transitions 0/1626 dead transitions. [2021-10-15 19:28:31,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1626 transitions, 20752 flow [2021-10-15 19:28:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:28:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:28:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2021-10-15 19:28:31,148 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46755555555555556 [2021-10-15 19:28:31,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2021-10-15 19:28:31,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2021-10-15 19:28:31,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:31,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2021-10-15 19:28:31,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 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 19:28:31,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:28:31,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:28:31,161 INFO L186 Difference]: Start difference. First operand has 385 places, 1293 transitions, 16392 flow. Second operand 3 states and 1052 transitions. [2021-10-15 19:28:31,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1626 transitions, 20752 flow [2021-10-15 19:28:31,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1626 transitions, 20152 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:28:31,342 INFO L242 Difference]: Finished difference. Result has 386 places, 1331 transitions, 16749 flow [2021-10-15 19:28:31,344 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=15748, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=16749, PETRI_PLACES=386, PETRI_TRANSITIONS=1331} [2021-10-15 19:28:31,344 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -35 predicate places. [2021-10-15 19:28:31,344 INFO L470 AbstractCegarLoop]: Abstraction has has 386 places, 1331 transitions, 16749 flow [2021-10-15 19:28:31,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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 19:28:31,345 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:31,346 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:28:31,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:28:31,346 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:31,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1980825658, now seen corresponding path program 1 times [2021-10-15 19:28:31,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:31,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166764320] [2021-10-15 19:28:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:31,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-10-15 19:28:31,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:31,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166764320] [2021-10-15 19:28:31,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166764320] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:28:31,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:28:31,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:28:31,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076989314] [2021-10-15 19:28:31,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:28:31,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:31,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:28:31,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:28:31,715 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 750 [2021-10-15 19:28:31,717 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1331 transitions, 16749 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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 19:28:31,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:31,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 750 [2021-10-15 19:28:31,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:28:52,720 INFO L129 PetriNetUnfolder]: 1703/21329 cut-off events. [2021-10-15 19:28:52,721 INFO L130 PetriNetUnfolder]: For 43387/43387 co-relation queries the response was YES. [2021-10-15 19:28:52,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54732 conditions, 21329 events. 1703/21329 cut-off events. For 43387/43387 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 171374 event pairs, 0 based on Foata normal form. 169/21485 useless extension candidates. Maximal degree in co-relation 53574. Up to 12469 conditions per place. [2021-10-15 19:28:52,796 INFO L132 encePairwiseOnDemand]: 561/750 looper letters, 1314 selfloop transitions, 577 changer transitions 24/1956 dead transitions. [2021-10-15 19:28:52,796 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1956 transitions, 26294 flow [2021-10-15 19:28:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:28:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:28:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1151 transitions. [2021-10-15 19:28:52,801 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5115555555555555 [2021-10-15 19:28:52,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1151 transitions. [2021-10-15 19:28:52,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1151 transitions. [2021-10-15 19:28:52,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:28:52,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1151 transitions. [2021-10-15 19:28:52,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 383.6666666666667) internal successors, (1151), 3 states have internal predecessors, (1151), 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 19:28:52,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:28:52,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:28:52,813 INFO L186 Difference]: Start difference. First operand has 386 places, 1331 transitions, 16749 flow. Second operand 3 states and 1151 transitions. [2021-10-15 19:28:52,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1956 transitions, 26294 flow [2021-10-15 19:28:52,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1956 transitions, 25842 flow, removed 201 selfloop flow, removed 1 redundant places. [2021-10-15 19:28:52,998 INFO L242 Difference]: Finished difference. Result has 389 places, 1590 transitions, 23424 flow [2021-10-15 19:28:53,000 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=16298, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=23424, PETRI_PLACES=389, PETRI_TRANSITIONS=1590} [2021-10-15 19:28:53,000 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -32 predicate places. [2021-10-15 19:28:53,000 INFO L470 AbstractCegarLoop]: Abstraction has has 389 places, 1590 transitions, 23424 flow [2021-10-15 19:28:53,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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 19:28:53,001 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:28:53,002 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:28:53,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:28:53,002 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:28:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:28:53,003 INFO L82 PathProgramCache]: Analyzing trace with hash -533162390, now seen corresponding path program 1 times [2021-10-15 19:28:53,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:28:53,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324103399] [2021-10-15 19:28:53,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:28:53,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:28:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:28:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-10-15 19:28:53,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:28:53,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324103399] [2021-10-15 19:28:53,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324103399] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:28:53,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:28:53,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:28:53,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391450814] [2021-10-15 19:28:53,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:28:53,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:28:53,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:28:53,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:28:53,289 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 750 [2021-10-15 19:28:53,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1590 transitions, 23424 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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 19:28:53,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:28:53,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 750 [2021-10-15 19:28:53,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:29:27,052 INFO L129 PetriNetUnfolder]: 1839/25935 cut-off events. [2021-10-15 19:29:27,052 INFO L130 PetriNetUnfolder]: For 75412/75412 co-relation queries the response was YES. [2021-10-15 19:29:27,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66946 conditions, 25935 events. 1839/25935 cut-off events. For 75412/75412 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 201858 event pairs, 0 based on Foata normal form. 511/26446 useless extension candidates. Maximal degree in co-relation 53209. Up to 14949 conditions per place. [2021-10-15 19:29:27,134 INFO L132 encePairwiseOnDemand]: 560/750 looper letters, 1192 selfloop transitions, 625 changer transitions 168/2052 dead transitions. [2021-10-15 19:29:27,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 2052 transitions, 31588 flow [2021-10-15 19:29:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:29:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:29:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1140 transitions. [2021-10-15 19:29:27,138 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2021-10-15 19:29:27,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1140 transitions. [2021-10-15 19:29:27,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1140 transitions. [2021-10-15 19:29:27,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:29:27,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1140 transitions. [2021-10-15 19:29:27,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 380.0) internal successors, (1140), 3 states have internal predecessors, (1140), 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 19:29:27,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:29:27,151 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:29:27,151 INFO L186 Difference]: Start difference. First operand has 389 places, 1590 transitions, 23424 flow. Second operand 3 states and 1140 transitions. [2021-10-15 19:29:27,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 2052 transitions, 31588 flow [2021-10-15 19:29:27,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 2052 transitions, 30272 flow, removed 13 selfloop flow, removed 2 redundant places. [2021-10-15 19:29:27,497 INFO L242 Difference]: Finished difference. Result has 391 places, 1589 transitions, 25778 flow [2021-10-15 19:29:27,499 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=21598, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=25778, PETRI_PLACES=391, PETRI_TRANSITIONS=1589} [2021-10-15 19:29:27,500 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -30 predicate places. [2021-10-15 19:29:27,501 INFO L470 AbstractCegarLoop]: Abstraction has has 391 places, 1589 transitions, 25778 flow [2021-10-15 19:29:27,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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 19:29:27,502 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:29:27,503 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:29:27,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 19:29:27,504 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:29:27,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:29:27,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1380580974, now seen corresponding path program 1 times [2021-10-15 19:29:27,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:29:27,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871563144] [2021-10-15 19:29:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:29:27,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:29:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:29:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-10-15 19:29:27,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:29:27,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871563144] [2021-10-15 19:29:27,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871563144] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:29:27,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:29:27,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:29:27,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366150941] [2021-10-15 19:29:27,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:29:27,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:29:27,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:29:27,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:29:27,908 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 750 [2021-10-15 19:29:27,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1589 transitions, 25778 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 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 19:29:27,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:29:27,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 750 [2021-10-15 19:29:27,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:06,625 INFO L129 PetriNetUnfolder]: 1711/26699 cut-off events. [2021-10-15 19:30:06,625 INFO L130 PetriNetUnfolder]: For 91915/91915 co-relation queries the response was YES. [2021-10-15 19:30:06,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69066 conditions, 26699 events. 1711/26699 cut-off events. For 91915/91915 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 212156 event pairs, 0 based on Foata normal form. 555/27248 useless extension candidates. Maximal degree in co-relation 55641. Up to 21653 conditions per place. [2021-10-15 19:30:06,717 INFO L132 encePairwiseOnDemand]: 571/750 looper letters, 1623 selfloop transitions, 268 changer transitions 0/1931 dead transitions. [2021-10-15 19:30:06,717 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1931 transitions, 31536 flow [2021-10-15 19:30:06,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:30:06,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:30:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1091 transitions. [2021-10-15 19:30:06,721 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48488888888888887 [2021-10-15 19:30:06,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1091 transitions. [2021-10-15 19:30:06,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1091 transitions. [2021-10-15 19:30:06,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:06,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1091 transitions. [2021-10-15 19:30:06,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 363.6666666666667) internal successors, (1091), 3 states have internal predecessors, (1091), 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 19:30:06,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:30:06,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:30:06,732 INFO L186 Difference]: Start difference. First operand has 391 places, 1589 transitions, 25778 flow. Second operand 3 states and 1091 transitions. [2021-10-15 19:30:06,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1931 transitions, 31536 flow [2021-10-15 19:30:07,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1931 transitions, 30058 flow, removed 64 selfloop flow, removed 2 redundant places. [2021-10-15 19:30:07,074 INFO L242 Difference]: Finished difference. Result has 393 places, 1636 transitions, 27636 flow [2021-10-15 19:30:07,077 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=23454, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=27636, PETRI_PLACES=393, PETRI_TRANSITIONS=1636} [2021-10-15 19:30:07,077 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -28 predicate places. [2021-10-15 19:30:07,077 INFO L470 AbstractCegarLoop]: Abstraction has has 393 places, 1636 transitions, 27636 flow [2021-10-15 19:30:07,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 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 19:30:07,078 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:07,079 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-10-15 19:30:07,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 19:30:07,080 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:30:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash 429223743, now seen corresponding path program 1 times [2021-10-15 19:30:07,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:07,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52138435] [2021-10-15 19:30:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:07,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-10-15 19:30:07,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:07,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52138435] [2021-10-15 19:30:07,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52138435] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:30:07,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:30:07,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:30:07,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397369897] [2021-10-15 19:30:07,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:30:07,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:07,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:30:07,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:30:07,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 750 [2021-10-15 19:30:07,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1636 transitions, 27636 flow. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 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 19:30:07,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:07,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 750 [2021-10-15 19:30:07,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:30:46,544 INFO L129 PetriNetUnfolder]: 1180/25551 cut-off events. [2021-10-15 19:30:46,544 INFO L130 PetriNetUnfolder]: For 69740/69740 co-relation queries the response was YES. [2021-10-15 19:30:46,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61581 conditions, 25551 events. 1180/25551 cut-off events. For 69740/69740 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 194282 event pairs, 0 based on Foata normal form. 503/26050 useless extension candidates. Maximal degree in co-relation 51579. Up to 21504 conditions per place. [2021-10-15 19:30:46,626 INFO L132 encePairwiseOnDemand]: 584/750 looper letters, 1320 selfloop transitions, 183 changer transitions 5/1548 dead transitions. [2021-10-15 19:30:46,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1548 transitions, 22352 flow [2021-10-15 19:30:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:30:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:30:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2021-10-15 19:30:46,631 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46755555555555556 [2021-10-15 19:30:46,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2021-10-15 19:30:46,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2021-10-15 19:30:46,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:30:46,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2021-10-15 19:30:46,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 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 19:30:46,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:30:46,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:30:46,641 INFO L186 Difference]: Start difference. First operand has 393 places, 1636 transitions, 27636 flow. Second operand 3 states and 1052 transitions. [2021-10-15 19:30:46,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1548 transitions, 22352 flow [2021-10-15 19:30:46,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1548 transitions, 21952 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:30:46,849 INFO L242 Difference]: Finished difference. Result has 394 places, 1248 transitions, 18813 flow [2021-10-15 19:30:46,852 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=18346, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1070, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=18813, PETRI_PLACES=394, PETRI_TRANSITIONS=1248} [2021-10-15 19:30:46,852 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -27 predicate places. [2021-10-15 19:30:46,853 INFO L470 AbstractCegarLoop]: Abstraction has has 394 places, 1248 transitions, 18813 flow [2021-10-15 19:30:46,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 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 19:30:46,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:30:46,854 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-10-15 19:30:46,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 19:30:46,855 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:30:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:30:46,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1588361727, now seen corresponding path program 1 times [2021-10-15 19:30:46,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:30:46,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425491384] [2021-10-15 19:30:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:30:46,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:30:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:30:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 1064 proven. 0 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-10-15 19:30:47,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:30:47,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425491384] [2021-10-15 19:30:47,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425491384] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:30:47,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:30:47,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:30:47,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838446499] [2021-10-15 19:30:47,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:30:47,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:30:47,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:30:47,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:30:47,362 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 750 [2021-10-15 19:30:47,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1248 transitions, 18813 flow. Second operand has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 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 19:30:47,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:30:47,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 750 [2021-10-15 19:30:47,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:31:27,924 INFO L129 PetriNetUnfolder]: 1573/34338 cut-off events. [2021-10-15 19:31:27,924 INFO L130 PetriNetUnfolder]: For 66604/66604 co-relation queries the response was YES. [2021-10-15 19:31:27,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83218 conditions, 34338 events. 1573/34338 cut-off events. For 66604/66604 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 265091 event pairs, 0 based on Foata normal form. 93/34431 useless extension candidates. Maximal degree in co-relation 70472. Up to 22661 conditions per place. [2021-10-15 19:31:28,039 INFO L132 encePairwiseOnDemand]: 580/750 looper letters, 1304 selfloop transitions, 528 changer transitions 8/1880 dead transitions. [2021-10-15 19:31:28,039 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1880 transitions, 30183 flow [2021-10-15 19:31:28,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:31:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:31:28,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1099 transitions. [2021-10-15 19:31:28,044 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48844444444444446 [2021-10-15 19:31:28,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1099 transitions. [2021-10-15 19:31:28,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1099 transitions. [2021-10-15 19:31:28,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:31:28,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1099 transitions. [2021-10-15 19:31:28,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 366.3333333333333) internal successors, (1099), 3 states have internal predecessors, (1099), 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 19:31:28,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:31:28,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:31:28,054 INFO L186 Difference]: Start difference. First operand has 394 places, 1248 transitions, 18813 flow. Second operand 3 states and 1099 transitions. [2021-10-15 19:31:28,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1880 transitions, 30183 flow [2021-10-15 19:31:28,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1880 transitions, 29916 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:31:28,261 INFO L242 Difference]: Finished difference. Result has 397 places, 1534 transitions, 27390 flow [2021-10-15 19:31:28,262 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=18630, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=27390, PETRI_PLACES=397, PETRI_TRANSITIONS=1534} [2021-10-15 19:31:28,262 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -24 predicate places. [2021-10-15 19:31:28,262 INFO L470 AbstractCegarLoop]: Abstraction has has 397 places, 1534 transitions, 27390 flow [2021-10-15 19:31:28,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 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 19:31:28,262 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:31:28,263 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2021-10-15 19:31:28,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 19:31:28,264 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:31:28,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:31:28,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1693523889, now seen corresponding path program 1 times [2021-10-15 19:31:28,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:31:28,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126214819] [2021-10-15 19:31:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:31:28,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:31:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:31:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4547 backedges. 3315 proven. 0 refuted. 0 times theorem prover too weak. 1232 trivial. 0 not checked. [2021-10-15 19:31:29,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:31:29,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126214819] [2021-10-15 19:31:29,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126214819] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:31:29,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:31:29,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:31:29,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118155256] [2021-10-15 19:31:29,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:31:29,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:31:29,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:31:29,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:31:29,603 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 750 [2021-10-15 19:31:29,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1534 transitions, 27390 flow. Second operand has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:31:29,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:31:29,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 750 [2021-10-15 19:31:29,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:31:53,989 INFO L129 PetriNetUnfolder]: 662/20769 cut-off events. [2021-10-15 19:31:53,989 INFO L130 PetriNetUnfolder]: For 32920/32920 co-relation queries the response was YES. [2021-10-15 19:31:54,027 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48140 conditions, 20769 events. 662/20769 cut-off events. For 32920/32920 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 175868 event pairs, 0 based on Foata normal form. 24/20793 useless extension candidates. Maximal degree in co-relation 47718. Up to 11624 conditions per place. [2021-10-15 19:31:54,036 INFO L132 encePairwiseOnDemand]: 691/750 looper letters, 0 selfloop transitions, 0 changer transitions 1244/1244 dead transitions. [2021-10-15 19:31:54,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1244 transitions, 17584 flow [2021-10-15 19:31:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:31:54,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:31:54,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 951 transitions. [2021-10-15 19:31:54,039 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4226666666666667 [2021-10-15 19:31:54,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 951 transitions. [2021-10-15 19:31:54,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 951 transitions. [2021-10-15 19:31:54,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:31:54,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 951 transitions. [2021-10-15 19:31:54,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 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 19:31:54,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:31:54,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 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 19:31:54,046 INFO L186 Difference]: Start difference. First operand has 397 places, 1534 transitions, 27390 flow. Second operand 3 states and 951 transitions. [2021-10-15 19:31:54,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1244 transitions, 17584 flow [2021-10-15 19:31:54,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1244 transitions, 16444 flow, removed 286 selfloop flow, removed 5 redundant places. [2021-10-15 19:31:54,130 INFO L242 Difference]: Finished difference. Result has 360 places, 0 transitions, 0 flow [2021-10-15 19:31:54,132 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=13190, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=935, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=360, PETRI_TRANSITIONS=0} [2021-10-15 19:31:54,132 INFO L334 CegarLoopForPetriNet]: 421 programPoint places, -61 predicate places. [2021-10-15 19:31:54,132 INFO L470 AbstractCegarLoop]: Abstraction has has 360 places, 0 transitions, 0 flow [2021-10-15 19:31:54,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:31:54,135 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:31:54,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 19:31:54,141 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:31:54,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:31:54 BoogieIcfgContainer [2021-10-15 19:31:54,147 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:31:54,147 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:31:54,147 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:31:54,148 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:31:54,148 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:27:10" (3/4) ... [2021-10-15 19:31:54,151 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:31:54,183 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-15 19:31:54,186 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:31:54,190 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:31:54,193 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:31:54,435 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:31:54,436 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:31:54,437 INFO L168 Benchmark]: Toolchain (without parser) took 288800.72 ms. Allocated memory was 127.9 MB in the beginning and 4.6 GB in the end (delta: 4.5 GB). Free memory was 88.5 MB in the beginning and 3.2 GB in the end (delta: -3.1 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.1 GB. [2021-10-15 19:31:54,438 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 86.0 MB. Free memory was 57.5 MB in the beginning and 57.5 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:31:54,438 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1189.55 ms. Allocated memory is still 127.9 MB. Free memory was 88.1 MB in the beginning and 91.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 56.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:54,439 INFO L168 Benchmark]: Boogie Procedure Inliner took 211.60 ms. Allocated memory is still 127.9 MB. Free memory was 91.5 MB in the beginning and 54.4 MB in the end (delta: 37.1 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:54,439 INFO L168 Benchmark]: Boogie Preprocessor took 299.06 ms. Allocated memory was 127.9 MB in the beginning and 228.6 MB in the end (delta: 100.7 MB). Free memory was 54.4 MB in the beginning and 168.2 MB in the end (delta: -113.8 MB). Peak memory consumption was 35.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:54,439 INFO L168 Benchmark]: RCFGBuilder took 3164.33 ms. Allocated memory is still 228.6 MB. Free memory was 167.2 MB in the beginning and 147.4 MB in the end (delta: 19.8 MB). Peak memory consumption was 76.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:54,440 INFO L168 Benchmark]: TraceAbstraction took 283638.77 ms. Allocated memory was 228.6 MB in the beginning and 4.6 GB in the end (delta: 4.4 GB). Free memory was 146.4 MB in the beginning and 3.2 GB in the end (delta: -3.1 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.1 GB. [2021-10-15 19:31:54,440 INFO L168 Benchmark]: Witness Printer took 288.61 ms. Allocated memory is still 4.6 GB. Free memory was 3.2 GB in the beginning and 3.2 GB in the end (delta: 40.3 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:31:54,442 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 86.0 MB. Free memory was 57.5 MB in the beginning and 57.5 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1189.55 ms. Allocated memory is still 127.9 MB. Free memory was 88.1 MB in the beginning and 91.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 56.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 211.60 ms. Allocated memory is still 127.9 MB. Free memory was 91.5 MB in the beginning and 54.4 MB in the end (delta: 37.1 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 299.06 ms. Allocated memory was 127.9 MB in the beginning and 228.6 MB in the end (delta: 100.7 MB). Free memory was 54.4 MB in the beginning and 168.2 MB in the end (delta: -113.8 MB). Peak memory consumption was 35.4 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3164.33 ms. Allocated memory is still 228.6 MB. Free memory was 167.2 MB in the beginning and 147.4 MB in the end (delta: 19.8 MB). Peak memory consumption was 76.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 283638.77 ms. Allocated memory was 228.6 MB in the beginning and 4.6 GB in the end (delta: 4.4 GB). Free memory was 146.4 MB in the beginning and 3.2 GB in the end (delta: -3.1 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.1 GB. * Witness Printer took 288.61 ms. Allocated memory is still 4.6 GB. Free memory was 3.2 GB in the beginning and 3.2 GB in the end (delta: 40.3 MB). Peak memory consumption was 39.8 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: 158]: 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, 424 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 17.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 283564.7ms, OverallIterations: 17, TraceHistogramMax: 10, EmptinessCheckTime: 0.0ms, AutomataDifference: 277580.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 249.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5240 SDtfs, 4190 SDslu, 0 SDs, 0 SdLazy, 15438 SolverSat, 3097 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27453.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=27636occurred in iteration=14, InterpolantAutomatonStates: 52, 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: 670.0ms SsaConstructionTime, 1239.7ms SatisfiabilityAnalysisTime, 3446.3ms InterpolantComputationTime, 8172 NumberOfCodeBlocks, 8172 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 8155 ConstructedInterpolants, 0 QuantifiedInterpolants, 16283 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 10660/10660 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 19:31:54,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b4c1d25-dedb-4f79-b05f-1c6943c44ab4/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...