./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-time-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-time-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD --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 72bbcf79bf9ab9dc66dc1f84247eb131a6de5c94da8e4a071481d48ca23ad8fa .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:21:32,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:21:32,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:21:32,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:21:32,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:21:32,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:21:32,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:21:32,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:21:32,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:21:32,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:21:32,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:21:32,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:21:32,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:21:32,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:21:32,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:21:32,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:21:32,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:21:32,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:21:32,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:21:32,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:21:32,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:21:32,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:21:32,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:21:32,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:21:32,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:21:32,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:21:32,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:21:32,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:21:32,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:21:32,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:21:32,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:21:32,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:21:32,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:21:32,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:21:32,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:21:32,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:21:32,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:21:32,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:21:32,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:21:32,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:21:32,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:21:32,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:21:32,301 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:21:32,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:21:32,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:21:32,304 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:21:32,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:21:32,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:21:32,307 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:21:32,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:21:32,307 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:21:32,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:21:32,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:21:32,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:21:32,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:21:32,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:21:32,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:21:32,310 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:21:32,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:21:32,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:21:32,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:21:32,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:21:32,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:21:32,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:21:32,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:21:32,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:21:32,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:21:32,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:21:32,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:21:32,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:21:32,314 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:21:32,316 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:21:32,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:21:32,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:21:32,318 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_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72bbcf79bf9ab9dc66dc1f84247eb131a6de5c94da8e4a071481d48ca23ad8fa [2021-10-28 23:21:32,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:21:32,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:21:32,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:21:32,768 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:21:32,769 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:21:32,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/weaver/chl-time-symm.wvr.c [2021-10-28 23:21:32,866 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/data/081d6c7bd/0264d1c1f15f4fae879ab73c1f48a148/FLAGed7faf499 [2021-10-28 23:21:33,520 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:21:33,525 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/sv-benchmarks/c/weaver/chl-time-symm.wvr.c [2021-10-28 23:21:33,545 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/data/081d6c7bd/0264d1c1f15f4fae879ab73c1f48a148/FLAGed7faf499 [2021-10-28 23:21:33,865 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/data/081d6c7bd/0264d1c1f15f4fae879ab73c1f48a148 [2021-10-28 23:21:33,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:21:33,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:21:33,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:21:33,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:21:33,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:21:33,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:21:33" (1/1) ... [2021-10-28 23:21:33,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d785204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:33, skipping insertion in model container [2021-10-28 23:21:33,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:21:33" (1/1) ... [2021-10-28 23:21:33,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:21:33,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:21:34,131 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_11968a02-47d9-413c-b87b-013a32d2988e/sv-benchmarks/c/weaver/chl-time-symm.wvr.c[2494,2507] [2021-10-28 23:21:34,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:21:34,158 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:21:34,182 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_11968a02-47d9-413c-b87b-013a32d2988e/sv-benchmarks/c/weaver/chl-time-symm.wvr.c[2494,2507] [2021-10-28 23:21:34,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:21:34,212 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:21:34,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:34 WrapperNode [2021-10-28 23:21:34,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:21:34,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:21:34,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:21:34,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:21:34,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:34" (1/1) ... [2021-10-28 23:21:34,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:34" (1/1) ... [2021-10-28 23:21:34,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:21:34,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:21:34,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:21:34,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:21:34,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:34" (1/1) ... [2021-10-28 23:21:34,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:34" (1/1) ... [2021-10-28 23:21:34,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:34" (1/1) ... [2021-10-28 23:21:34,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:34" (1/1) ... [2021-10-28 23:21:34,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:34" (1/1) ... [2021-10-28 23:21:34,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:34" (1/1) ... [2021-10-28 23:21:34,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:34" (1/1) ... [2021-10-28 23:21:34,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:21:34,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:21:34,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:21:34,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:21:34,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:34" (1/1) ... [2021-10-28 23:21:34,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:21:34,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:21:34,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:21:34,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:21:34,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-28 23:21:34,430 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-28 23:21:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-28 23:21:34,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-28 23:21:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:21:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:21:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:21:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-28 23:21:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-28 23:21:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:21:34,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:21:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:21:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:21:34,435 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-28 23:21:35,676 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:21:35,676 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-28 23:21:35,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:21:35 BoogieIcfgContainer [2021-10-28 23:21:35,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:21:35,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:21:35,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:21:35,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:21:35,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:21:33" (1/3) ... [2021-10-28 23:21:35,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b679ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:21:35, skipping insertion in model container [2021-10-28 23:21:35,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:21:34" (2/3) ... [2021-10-28 23:21:35,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b679ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:21:35, skipping insertion in model container [2021-10-28 23:21:35,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:21:35" (3/3) ... [2021-10-28 23:21:35,689 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-time-symm.wvr.c [2021-10-28 23:21:35,696 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-28 23:21:35,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:21:35,697 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:21:35,697 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-28 23:21:35,732 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,732 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,732 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,733 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,733 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,733 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,733 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,734 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,734 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,734 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,734 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,735 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,736 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,736 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,736 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,736 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,737 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,737 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,737 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,737 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,738 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,738 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,739 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,739 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,739 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,740 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,740 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,740 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,741 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,741 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,741 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,741 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,742 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,742 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,742 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,742 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,743 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,743 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,744 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,744 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,744 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,744 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,745 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,745 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,745 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,745 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,745 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,746 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,747 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,747 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,747 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,747 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,751 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,752 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,752 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,752 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,752 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,753 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,753 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,753 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,753 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,754 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,754 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,754 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,757 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,757 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,758 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_minus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,758 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,758 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,759 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_minus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,759 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,759 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,759 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,760 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,760 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,760 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:21:35,775 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-28 23:21:35,825 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:21:35,833 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:21:35,834 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-28 23:21:35,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 98 places, 96 transitions, 208 flow [2021-10-28 23:21:35,935 INFO L129 PetriNetUnfolder]: 5/94 cut-off events. [2021-10-28 23:21:35,936 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-28 23:21:35,939 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 94 events. 5/94 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2021-10-28 23:21:35,939 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 96 transitions, 208 flow [2021-10-28 23:21:35,946 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 86 transitions, 184 flow [2021-10-28 23:21:35,987 INFO L129 PetriNetUnfolder]: 5/85 cut-off events. [2021-10-28 23:21:35,988 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-28 23:21:35,991 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:21:35,992 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:35,993 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:21:36,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:36,002 INFO L85 PathProgramCache]: Analyzing trace with hash -398877861, now seen corresponding path program 1 times [2021-10-28 23:21:36,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:36,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965246762] [2021-10-28 23:21:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:36,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:21:36,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:36,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965246762] [2021-10-28 23:21:36,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965246762] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:36,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:36,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:21:36,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693473150] [2021-10-28 23:21:36,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:21:36,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:36,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:21:36,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:21:36,648 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 96 [2021-10-28 23:21:36,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 75.2) internal successors, (376), 5 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:36,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:21:36,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 96 [2021-10-28 23:21:36,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:21:36,918 INFO L129 PetriNetUnfolder]: 6/146 cut-off events. [2021-10-28 23:21:36,918 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-28 23:21:36,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 146 events. 6/146 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 295 event pairs, 0 based on Foata normal form. 4/137 useless extension candidates. Maximal degree in co-relation 56. Up to 14 conditions per place. [2021-10-28 23:21:36,922 INFO L132 encePairwiseOnDemand]: 89/96 looper letters, 28 selfloop transitions, 5 changer transitions 1/96 dead transitions. [2021-10-28 23:21:36,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 96 transitions, 270 flow [2021-10-28 23:21:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:21:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-28 23:21:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 471 transitions. [2021-10-28 23:21:36,952 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8177083333333334 [2021-10-28 23:21:36,953 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 471 transitions. [2021-10-28 23:21:36,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 471 transitions. [2021-10-28 23:21:36,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:21:36,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 471 transitions. [2021-10-28 23:21:36,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.5) internal successors, (471), 6 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:36,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:36,986 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:36,988 INFO L186 Difference]: Start difference. First operand has 88 places, 86 transitions, 184 flow. Second operand 6 states and 471 transitions. [2021-10-28 23:21:36,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 96 transitions, 270 flow [2021-10-28 23:21:36,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 96 transitions, 262 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-10-28 23:21:37,002 INFO L242 Difference]: Finished difference. Result has 92 places, 88 transitions, 208 flow [2021-10-28 23:21:37,004 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=92, PETRI_TRANSITIONS=88} [2021-10-28 23:21:37,005 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 4 predicate places. [2021-10-28 23:21:37,006 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 88 transitions, 208 flow [2021-10-28 23:21:37,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.2) internal successors, (376), 5 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:37,007 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:21:37,008 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:37,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:21:37,009 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:21:37,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:37,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1572564141, now seen corresponding path program 2 times [2021-10-28 23:21:37,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:37,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435975733] [2021-10-28 23:21:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:37,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:21:37,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:37,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435975733] [2021-10-28 23:21:37,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435975733] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:37,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:37,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:21:37,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571150844] [2021-10-28 23:21:37,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:21:37,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:37,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:21:37,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:21:37,309 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 96 [2021-10-28 23:21:37,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 88 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 75.2) internal successors, (376), 5 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:37,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:21:37,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 96 [2021-10-28 23:21:37,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:21:37,513 INFO L129 PetriNetUnfolder]: 6/144 cut-off events. [2021-10-28 23:21:37,513 INFO L130 PetriNetUnfolder]: For 16/18 co-relation queries the response was YES. [2021-10-28 23:21:37,514 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 144 events. 6/144 cut-off events. For 16/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 284 event pairs, 0 based on Foata normal form. 2/144 useless extension candidates. Maximal degree in co-relation 140. Up to 14 conditions per place. [2021-10-28 23:21:37,515 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 28 selfloop transitions, 7 changer transitions 0/97 dead transitions. [2021-10-28 23:21:37,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 97 transitions, 306 flow [2021-10-28 23:21:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:21:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-28 23:21:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 467 transitions. [2021-10-28 23:21:37,519 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8107638888888888 [2021-10-28 23:21:37,519 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 467 transitions. [2021-10-28 23:21:37,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 467 transitions. [2021-10-28 23:21:37,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:21:37,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 467 transitions. [2021-10-28 23:21:37,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.83333333333333) internal successors, (467), 6 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:37,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:37,525 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:37,526 INFO L186 Difference]: Start difference. First operand has 92 places, 88 transitions, 208 flow. Second operand 6 states and 467 transitions. [2021-10-28 23:21:37,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 97 transitions, 306 flow [2021-10-28 23:21:37,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 97 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-28 23:21:37,531 INFO L242 Difference]: Finished difference. Result has 98 places, 90 transitions, 248 flow [2021-10-28 23:21:37,532 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=98, PETRI_TRANSITIONS=90} [2021-10-28 23:21:37,532 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 10 predicate places. [2021-10-28 23:21:37,533 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 90 transitions, 248 flow [2021-10-28 23:21:37,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.2) internal successors, (376), 5 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:37,534 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:21:37,534 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:37,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:21:37,534 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:21:37,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:37,535 INFO L85 PathProgramCache]: Analyzing trace with hash 245926642, now seen corresponding path program 1 times [2021-10-28 23:21:37,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:37,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458069841] [2021-10-28 23:21:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:37,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:21:37,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:37,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458069841] [2021-10-28 23:21:37,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458069841] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:37,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:37,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:21:37,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711232104] [2021-10-28 23:21:37,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:21:37,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:37,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:21:37,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:21:37,681 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 96 [2021-10-28 23:21:37,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 90 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:37,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:21:37,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 96 [2021-10-28 23:21:37,683 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:21:37,871 INFO L129 PetriNetUnfolder]: 4/164 cut-off events. [2021-10-28 23:21:37,871 INFO L130 PetriNetUnfolder]: For 46/50 co-relation queries the response was YES. [2021-10-28 23:21:37,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 164 events. 4/164 cut-off events. For 46/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 422 event pairs, 0 based on Foata normal form. 3/165 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2021-10-28 23:21:37,873 INFO L132 encePairwiseOnDemand]: 88/96 looper letters, 26 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2021-10-28 23:21:37,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 97 transitions, 340 flow [2021-10-28 23:21:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:21:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-28 23:21:37,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 537 transitions. [2021-10-28 23:21:37,878 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7991071428571429 [2021-10-28 23:21:37,878 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 537 transitions. [2021-10-28 23:21:37,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 537 transitions. [2021-10-28 23:21:37,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:21:37,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 537 transitions. [2021-10-28 23:21:37,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:37,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:37,885 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:37,886 INFO L186 Difference]: Start difference. First operand has 98 places, 90 transitions, 248 flow. Second operand 7 states and 537 transitions. [2021-10-28 23:21:37,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 97 transitions, 340 flow [2021-10-28 23:21:37,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 97 transitions, 333 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-28 23:21:37,893 INFO L242 Difference]: Finished difference. Result has 104 places, 93 transitions, 278 flow [2021-10-28 23:21:37,894 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=104, PETRI_TRANSITIONS=93} [2021-10-28 23:21:37,894 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 16 predicate places. [2021-10-28 23:21:37,894 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 93 transitions, 278 flow [2021-10-28 23:21:37,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:37,895 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:21:37,895 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:37,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:21:37,896 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:21:37,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1985317150, now seen corresponding path program 1 times [2021-10-28 23:21:37,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:37,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475458157] [2021-10-28 23:21:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:37,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:21:38,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:38,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475458157] [2021-10-28 23:21:38,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475458157] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:38,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:38,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:21:38,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693355965] [2021-10-28 23:21:38,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:21:38,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:38,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:21:38,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:21:38,112 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 96 [2021-10-28 23:21:38,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 93 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 80.57142857142857) internal successors, (564), 7 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:38,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:21:38,114 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 96 [2021-10-28 23:21:38,114 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:21:38,244 INFO L129 PetriNetUnfolder]: 6/201 cut-off events. [2021-10-28 23:21:38,245 INFO L130 PetriNetUnfolder]: For 51/53 co-relation queries the response was YES. [2021-10-28 23:21:38,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 201 events. 6/201 cut-off events. For 51/53 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 691 event pairs, 0 based on Foata normal form. 2/203 useless extension candidates. Maximal degree in co-relation 221. Up to 52 conditions per place. [2021-10-28 23:21:38,249 INFO L132 encePairwiseOnDemand]: 88/96 looper letters, 18 selfloop transitions, 4 changer transitions 4/105 dead transitions. [2021-10-28 23:21:38,249 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 105 transitions, 354 flow [2021-10-28 23:21:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:21:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-28 23:21:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 580 transitions. [2021-10-28 23:21:38,253 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8630952380952381 [2021-10-28 23:21:38,254 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 580 transitions. [2021-10-28 23:21:38,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 580 transitions. [2021-10-28 23:21:38,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:21:38,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 580 transitions. [2021-10-28 23:21:38,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:38,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:38,262 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:38,262 INFO L186 Difference]: Start difference. First operand has 104 places, 93 transitions, 278 flow. Second operand 7 states and 580 transitions. [2021-10-28 23:21:38,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 105 transitions, 354 flow [2021-10-28 23:21:38,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 105 transitions, 348 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-28 23:21:38,274 INFO L242 Difference]: Finished difference. Result has 113 places, 96 transitions, 306 flow [2021-10-28 23:21:38,274 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=306, PETRI_PLACES=113, PETRI_TRANSITIONS=96} [2021-10-28 23:21:38,275 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 25 predicate places. [2021-10-28 23:21:38,275 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 96 transitions, 306 flow [2021-10-28 23:21:38,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 80.57142857142857) internal successors, (564), 7 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:38,276 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:21:38,276 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:38,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:21:38,277 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:21:38,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:38,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1001518309, now seen corresponding path program 1 times [2021-10-28 23:21:38,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:38,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807925663] [2021-10-28 23:21:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:38,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:21:38,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:38,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807925663] [2021-10-28 23:21:38,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807925663] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:38,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:38,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:21:38,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592126576] [2021-10-28 23:21:38,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:21:38,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:21:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:21:38,533 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 96 [2021-10-28 23:21:38,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 96 transitions, 306 flow. Second operand has 7 states, 7 states have (on average 80.57142857142857) internal successors, (564), 7 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:38,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:21:38,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 96 [2021-10-28 23:21:38,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:21:38,704 INFO L129 PetriNetUnfolder]: 4/203 cut-off events. [2021-10-28 23:21:38,704 INFO L130 PetriNetUnfolder]: For 59/61 co-relation queries the response was YES. [2021-10-28 23:21:38,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 203 events. 4/203 cut-off events. For 59/61 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 706 event pairs, 0 based on Foata normal form. 2/205 useless extension candidates. Maximal degree in co-relation 277. Up to 78 conditions per place. [2021-10-28 23:21:38,706 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 15 selfloop transitions, 0 changer transitions 10/101 dead transitions. [2021-10-28 23:21:38,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 101 transitions, 362 flow [2021-10-28 23:21:38,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:21:38,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-28 23:21:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 573 transitions. [2021-10-28 23:21:38,711 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8526785714285714 [2021-10-28 23:21:38,711 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 573 transitions. [2021-10-28 23:21:38,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 573 transitions. [2021-10-28 23:21:38,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:21:38,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 573 transitions. [2021-10-28 23:21:38,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:38,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:38,718 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:38,718 INFO L186 Difference]: Start difference. First operand has 113 places, 96 transitions, 306 flow. Second operand 7 states and 573 transitions. [2021-10-28 23:21:38,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 101 transitions, 362 flow [2021-10-28 23:21:38,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 101 transitions, 350 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-10-28 23:21:38,731 INFO L242 Difference]: Finished difference. Result has 117 places, 91 transitions, 277 flow [2021-10-28 23:21:38,732 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=277, PETRI_PLACES=117, PETRI_TRANSITIONS=91} [2021-10-28 23:21:38,732 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 29 predicate places. [2021-10-28 23:21:38,732 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 91 transitions, 277 flow [2021-10-28 23:21:38,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 80.57142857142857) internal successors, (564), 7 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:38,733 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:21:38,734 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:38,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:21:38,735 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:21:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:38,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1224897900, now seen corresponding path program 2 times [2021-10-28 23:21:38,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:38,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067073890] [2021-10-28 23:21:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:38,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:21:38,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:38,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067073890] [2021-10-28 23:21:38,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067073890] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:38,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:38,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:21:38,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675874967] [2021-10-28 23:21:38,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:21:38,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:38,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:21:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:21:38,915 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 96 [2021-10-28 23:21:38,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 91 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:38,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:21:38,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 96 [2021-10-28 23:21:38,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:21:39,080 INFO L129 PetriNetUnfolder]: 4/174 cut-off events. [2021-10-28 23:21:39,080 INFO L130 PetriNetUnfolder]: For 66/70 co-relation queries the response was YES. [2021-10-28 23:21:39,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 174 events. 4/174 cut-off events. For 66/70 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 479 event pairs, 0 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 325. Up to 13 conditions per place. [2021-10-28 23:21:39,082 INFO L132 encePairwiseOnDemand]: 89/96 looper letters, 21 selfloop transitions, 9 changer transitions 2/95 dead transitions. [2021-10-28 23:21:39,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 95 transitions, 359 flow [2021-10-28 23:21:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:21:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-28 23:21:39,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 535 transitions. [2021-10-28 23:21:39,086 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7961309523809523 [2021-10-28 23:21:39,086 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 535 transitions. [2021-10-28 23:21:39,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 535 transitions. [2021-10-28 23:21:39,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:21:39,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 535 transitions. [2021-10-28 23:21:39,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.42857142857143) internal successors, (535), 7 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,094 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,095 INFO L186 Difference]: Start difference. First operand has 117 places, 91 transitions, 277 flow. Second operand 7 states and 535 transitions. [2021-10-28 23:21:39,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 95 transitions, 359 flow [2021-10-28 23:21:39,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 95 transitions, 325 flow, removed 13 selfloop flow, removed 9 redundant places. [2021-10-28 23:21:39,100 INFO L242 Difference]: Finished difference. Result has 109 places, 90 transitions, 270 flow [2021-10-28 23:21:39,100 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=270, PETRI_PLACES=109, PETRI_TRANSITIONS=90} [2021-10-28 23:21:39,101 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 21 predicate places. [2021-10-28 23:21:39,101 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 90 transitions, 270 flow [2021-10-28 23:21:39,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:21:39,102 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:39,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:21:39,102 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:21:39,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:39,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1059012304, now seen corresponding path program 1 times [2021-10-28 23:21:39,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:39,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529784927] [2021-10-28 23:21:39,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:39,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:21:39,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:39,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529784927] [2021-10-28 23:21:39,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529784927] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:39,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:39,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:21:39,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392626080] [2021-10-28 23:21:39,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:21:39,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:39,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:21:39,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:21:39,213 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 96 [2021-10-28 23:21:39,213 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 90 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,214 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:21:39,214 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 96 [2021-10-28 23:21:39,214 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:21:39,334 INFO L129 PetriNetUnfolder]: 0/159 cut-off events. [2021-10-28 23:21:39,334 INFO L130 PetriNetUnfolder]: For 42/46 co-relation queries the response was YES. [2021-10-28 23:21:39,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 159 events. 0/159 cut-off events. For 42/46 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 403 event pairs, 0 based on Foata normal form. 3/162 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-10-28 23:21:39,335 INFO L132 encePairwiseOnDemand]: 89/96 looper letters, 23 selfloop transitions, 6 changer transitions 1/93 dead transitions. [2021-10-28 23:21:39,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 93 transitions, 334 flow [2021-10-28 23:21:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:21:39,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-28 23:21:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 460 transitions. [2021-10-28 23:21:39,338 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7986111111111112 [2021-10-28 23:21:39,338 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 460 transitions. [2021-10-28 23:21:39,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 460 transitions. [2021-10-28 23:21:39,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:21:39,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 460 transitions. [2021-10-28 23:21:39,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 76.66666666666667) internal successors, (460), 6 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,343 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,344 INFO L186 Difference]: Start difference. First operand has 109 places, 90 transitions, 270 flow. Second operand 6 states and 460 transitions. [2021-10-28 23:21:39,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 93 transitions, 334 flow [2021-10-28 23:21:39,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 93 transitions, 319 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-10-28 23:21:39,349 INFO L242 Difference]: Finished difference. Result has 109 places, 89 transitions, 263 flow [2021-10-28 23:21:39,349 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=263, PETRI_PLACES=109, PETRI_TRANSITIONS=89} [2021-10-28 23:21:39,349 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 21 predicate places. [2021-10-28 23:21:39,350 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 89 transitions, 263 flow [2021-10-28 23:21:39,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,350 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:21:39,351 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:39,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 23:21:39,351 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:21:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:39,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1988512332, now seen corresponding path program 1 times [2021-10-28 23:21:39,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:39,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835708926] [2021-10-28 23:21:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:39,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:21:39,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:39,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835708926] [2021-10-28 23:21:39,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835708926] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:39,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:39,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 23:21:39,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287215024] [2021-10-28 23:21:39,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:21:39,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:39,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:21:39,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:21:39,479 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 96 [2021-10-28 23:21:39,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 89 transitions, 263 flow. Second operand has 8 states, 8 states have (on average 77.625) internal successors, (621), 8 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:21:39,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 96 [2021-10-28 23:21:39,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:21:39,593 INFO L129 PetriNetUnfolder]: 0/144 cut-off events. [2021-10-28 23:21:39,593 INFO L130 PetriNetUnfolder]: For 22/24 co-relation queries the response was YES. [2021-10-28 23:21:39,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 144 events. 0/144 cut-off events. For 22/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 300 event pairs, 0 based on Foata normal form. 2/146 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2021-10-28 23:21:39,594 INFO L132 encePairwiseOnDemand]: 87/96 looper letters, 20 selfloop transitions, 4 changer transitions 5/100 dead transitions. [2021-10-28 23:21:39,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 100 transitions, 343 flow [2021-10-28 23:21:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:21:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-28 23:21:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 638 transitions. [2021-10-28 23:21:39,598 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8307291666666666 [2021-10-28 23:21:39,598 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 638 transitions. [2021-10-28 23:21:39,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 638 transitions. [2021-10-28 23:21:39,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:21:39,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 638 transitions. [2021-10-28 23:21:39,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.75) internal successors, (638), 8 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 96.0) internal successors, (864), 9 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,608 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 96.0) internal successors, (864), 9 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,609 INFO L186 Difference]: Start difference. First operand has 109 places, 89 transitions, 263 flow. Second operand 8 states and 638 transitions. [2021-10-28 23:21:39,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 100 transitions, 343 flow [2021-10-28 23:21:39,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 100 transitions, 337 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-28 23:21:39,613 INFO L242 Difference]: Finished difference. Result has 118 places, 89 transitions, 277 flow [2021-10-28 23:21:39,613 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=277, PETRI_PLACES=118, PETRI_TRANSITIONS=89} [2021-10-28 23:21:39,614 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 30 predicate places. [2021-10-28 23:21:39,614 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 89 transitions, 277 flow [2021-10-28 23:21:39,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 77.625) internal successors, (621), 8 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,615 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:21:39,615 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:39,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 23:21:39,615 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:21:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:39,616 INFO L85 PathProgramCache]: Analyzing trace with hash -178473350, now seen corresponding path program 1 times [2021-10-28 23:21:39,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:39,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313384222] [2021-10-28 23:21:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:39,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:21:39,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:39,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313384222] [2021-10-28 23:21:39,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313384222] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:39,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:39,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:21:39,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972541357] [2021-10-28 23:21:39,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:21:39,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:39,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:21:39,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:21:39,754 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 96 [2021-10-28 23:21:39,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 89 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:21:39,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 96 [2021-10-28 23:21:39,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:21:39,881 INFO L129 PetriNetUnfolder]: 0/122 cut-off events. [2021-10-28 23:21:39,881 INFO L130 PetriNetUnfolder]: For 34/38 co-relation queries the response was YES. [2021-10-28 23:21:39,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 122 events. 0/122 cut-off events. For 34/38 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 153 event pairs, 0 based on Foata normal form. 3/125 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-10-28 23:21:39,882 INFO L132 encePairwiseOnDemand]: 89/96 looper letters, 17 selfloop transitions, 4 changer transitions 6/90 dead transitions. [2021-10-28 23:21:39,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 90 transitions, 329 flow [2021-10-28 23:21:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:21:39,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-28 23:21:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 530 transitions. [2021-10-28 23:21:39,885 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7886904761904762 [2021-10-28 23:21:39,885 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 530 transitions. [2021-10-28 23:21:39,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 530 transitions. [2021-10-28 23:21:39,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:21:39,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 530 transitions. [2021-10-28 23:21:39,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.71428571428571) internal successors, (530), 7 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,891 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,891 INFO L186 Difference]: Start difference. First operand has 118 places, 89 transitions, 277 flow. Second operand 7 states and 530 transitions. [2021-10-28 23:21:39,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 90 transitions, 329 flow [2021-10-28 23:21:39,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 90 transitions, 307 flow, removed 7 selfloop flow, removed 7 redundant places. [2021-10-28 23:21:39,896 INFO L242 Difference]: Finished difference. Result has 112 places, 84 transitions, 231 flow [2021-10-28 23:21:39,896 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=112, PETRI_TRANSITIONS=84} [2021-10-28 23:21:39,896 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 24 predicate places. [2021-10-28 23:21:39,897 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 84 transitions, 231 flow [2021-10-28 23:21:39,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:39,897 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:21:39,898 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:39,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 23:21:39,899 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:21:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:39,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1736823436, now seen corresponding path program 1 times [2021-10-28 23:21:39,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:39,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763424583] [2021-10-28 23:21:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:39,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:21:40,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:40,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763424583] [2021-10-28 23:21:40,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763424583] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:40,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:40,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:21:40,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79642266] [2021-10-28 23:21:40,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:21:40,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:40,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:21:40,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:21:40,026 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 96 [2021-10-28 23:21:40,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 84 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:40,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:21:40,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 96 [2021-10-28 23:21:40,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:21:40,123 INFO L129 PetriNetUnfolder]: 0/80 cut-off events. [2021-10-28 23:21:40,124 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-10-28 23:21:40,124 INFO L84 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 80 events. 0/80 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-10-28 23:21:40,124 INFO L132 encePairwiseOnDemand]: 92/96 looper letters, 16 selfloop transitions, 2 changer transitions 4/80 dead transitions. [2021-10-28 23:21:40,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 80 transitions, 253 flow [2021-10-28 23:21:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:21:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-28 23:21:40,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 381 transitions. [2021-10-28 23:21:40,128 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.79375 [2021-10-28 23:21:40,128 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 381 transitions. [2021-10-28 23:21:40,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 381 transitions. [2021-10-28 23:21:40,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:21:40,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 381 transitions. [2021-10-28 23:21:40,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:40,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 96.0) internal successors, (576), 6 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:40,133 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 96.0) internal successors, (576), 6 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:40,133 INFO L186 Difference]: Start difference. First operand has 112 places, 84 transitions, 231 flow. Second operand 5 states and 381 transitions. [2021-10-28 23:21:40,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 80 transitions, 253 flow [2021-10-28 23:21:40,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 80 transitions, 221 flow, removed 3 selfloop flow, removed 14 redundant places. [2021-10-28 23:21:40,136 INFO L242 Difference]: Finished difference. Result has 96 places, 76 transitions, 173 flow [2021-10-28 23:21:40,137 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=96, PETRI_TRANSITIONS=76} [2021-10-28 23:21:40,138 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 8 predicate places. [2021-10-28 23:21:40,138 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 76 transitions, 173 flow [2021-10-28 23:21:40,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:40,138 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:21:40,139 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:21:40,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 23:21:40,139 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:21:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:21:40,141 INFO L85 PathProgramCache]: Analyzing trace with hash 839978080, now seen corresponding path program 2 times [2021-10-28 23:21:40,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:21:40,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033821648] [2021-10-28 23:21:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:21:40,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:21:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:21:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:21:40,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:21:40,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033821648] [2021-10-28 23:21:40,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033821648] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:21:40,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:21:40,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:21:40,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063324483] [2021-10-28 23:21:40,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:21:40,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:21:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:21:40,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:21:40,279 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 96 [2021-10-28 23:21:40,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 76 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:40,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:21:40,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 96 [2021-10-28 23:21:40,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:21:40,372 INFO L129 PetriNetUnfolder]: 0/64 cut-off events. [2021-10-28 23:21:40,373 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-28 23:21:40,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 64 events. 0/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 1/65 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-10-28 23:21:40,373 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 0 selfloop transitions, 0 changer transitions 64/64 dead transitions. [2021-10-28 23:21:40,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 64 transitions, 179 flow [2021-10-28 23:21:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:21:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-28 23:21:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 450 transitions. [2021-10-28 23:21:40,377 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.78125 [2021-10-28 23:21:40,377 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 450 transitions. [2021-10-28 23:21:40,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 450 transitions. [2021-10-28 23:21:40,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:21:40,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 450 transitions. [2021-10-28 23:21:40,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 75.0) internal successors, (450), 6 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:40,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:40,382 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:40,383 INFO L186 Difference]: Start difference. First operand has 96 places, 76 transitions, 173 flow. Second operand 6 states and 450 transitions. [2021-10-28 23:21:40,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 64 transitions, 179 flow [2021-10-28 23:21:40,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 64 transitions, 170 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-10-28 23:21:40,385 INFO L242 Difference]: Finished difference. Result has 77 places, 0 transitions, 0 flow [2021-10-28 23:21:40,385 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=77, PETRI_TRANSITIONS=0} [2021-10-28 23:21:40,385 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, -11 predicate places. [2021-10-28 23:21:40,386 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 0 transitions, 0 flow [2021-10-28 23:21:40,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:21:40,389 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:21:40,390 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-28 23:21:40,390 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-28 23:21:40,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 23:21:40,394 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 23:21:40,397 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-28 23:21:40,397 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:21:40,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:21:40 BasicIcfg [2021-10-28 23:21:40,400 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:21:40,401 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:21:40,401 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:21:40,401 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:21:40,402 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:21:35" (3/4) ... [2021-10-28 23:21:40,405 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:21:40,412 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-28 23:21:40,412 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-28 23:21:40,418 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-28 23:21:40,418 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 23:21:40,419 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:21:40,419 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:21:40,488 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:21:40,488 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:21:40,490 INFO L168 Benchmark]: Toolchain (without parser) took 6610.98 ms. Allocated memory was 90.2 MB in the beginning and 144.7 MB in the end (delta: 54.5 MB). Free memory was 59.2 MB in the beginning and 99.2 MB in the end (delta: -40.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:21:40,490 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory is still 46.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:21:40,491 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.90 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 59.2 MB in the beginning and 94.7 MB in the end (delta: -35.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:21:40,492 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.52 ms. Allocated memory is still 119.5 MB. Free memory was 94.2 MB in the beginning and 92.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:21:40,492 INFO L168 Benchmark]: Boogie Preprocessor took 59.33 ms. Allocated memory is still 119.5 MB. Free memory was 92.6 MB in the beginning and 91.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:21:40,493 INFO L168 Benchmark]: RCFGBuilder took 1343.68 ms. Allocated memory is still 119.5 MB. Free memory was 91.0 MB in the beginning and 94.5 MB in the end (delta: -3.5 MB). Peak memory consumption was 47.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:21:40,493 INFO L168 Benchmark]: TraceAbstraction took 4719.21 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 93.8 MB in the beginning and 103.4 MB in the end (delta: -9.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:21:40,494 INFO L168 Benchmark]: Witness Printer took 87.15 ms. Allocated memory is still 144.7 MB. Free memory was 102.3 MB in the beginning and 99.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:21:40,496 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory is still 46.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 333.90 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 59.2 MB in the beginning and 94.7 MB in the end (delta: -35.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.52 ms. Allocated memory is still 119.5 MB. Free memory was 94.2 MB in the beginning and 92.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.33 ms. Allocated memory is still 119.5 MB. Free memory was 92.6 MB in the beginning and 91.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1343.68 ms. Allocated memory is still 119.5 MB. Free memory was 91.0 MB in the beginning and 94.5 MB in the end (delta: -3.5 MB). Peak memory consumption was 47.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4719.21 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 93.8 MB in the beginning and 103.4 MB in the end (delta: -9.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. * Witness Printer took 87.15 ms. Allocated memory is still 144.7 MB. Free memory was 102.3 MB in the beginning and 99.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 80]: 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 with 1 thread instances CFG has 5 procedures, 102 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.5s, OverallIterations: 11, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 161 SDtfs, 226 SDslu, 303 SDs, 0 SdLazy, 411 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=306occurred in iteration=4, InterpolantAutomatonStates: 72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 820 NumberOfCodeBlocks, 820 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 809 ConstructedInterpolants, 0 QuantifiedInterpolants, 1638 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 0/0 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! [2021-10-28 23:21:40,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11968a02-47d9-413c-b87b-013a32d2988e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...