./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:02:43,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:02:43,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:02:43,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:02:43,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:02:43,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:02:43,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:02:43,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:02:43,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:02:43,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:02:43,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:02:43,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:02:43,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:02:43,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:02:43,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:02:43,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:02:43,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:02:43,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:02:43,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:02:43,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:02:43,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:02:43,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:02:43,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:02:43,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:02:43,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:02:43,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:02:43,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:02:43,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:02:43,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:02:43,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:02:43,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:02:43,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:02:43,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:02:43,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:02:43,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:02:43,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:02:43,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:02:43,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:02:43,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:02:43,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:02:43,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:02:43,330 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:02:43,353 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:02:43,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:02:43,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:02:43,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:02:43,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:02:43,355 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:02:43,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:02:43,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:02:43,355 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:02:43,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:02:43,355 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:02:43,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:02:43,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:02:43,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:02:43,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:02:43,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:02:43,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:02:43,356 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:02:43,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:02:43,356 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:02:43,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:02:43,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:02:43,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:02:43,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:02:43,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:02:43,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:02:43,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:02:43,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:02:43,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:02:43,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:02:43,362 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:02:43,362 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:02:43,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:02:43,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:02:43,363 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_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c [2021-12-06 23:02:43,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:02:43,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:02:43,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:02:43,545 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:02:43,546 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:02:43,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2021-12-06 23:02:43,588 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/data/2b4bb309f/5f7c2745d03444f2827a4bf1977d561b/FLAG22d135f8b [2021-12-06 23:02:44,014 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:02:44,014 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2021-12-06 23:02:44,020 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/data/2b4bb309f/5f7c2745d03444f2827a4bf1977d561b/FLAG22d135f8b [2021-12-06 23:02:44,030 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/data/2b4bb309f/5f7c2745d03444f2827a4bf1977d561b [2021-12-06 23:02:44,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:02:44,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:02:44,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:02:44,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:02:44,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:02:44,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:02:44" (1/1) ... [2021-12-06 23:02:44,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ca7602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:02:44, skipping insertion in model container [2021-12-06 23:02:44,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:02:44" (1/1) ... [2021-12-06 23:02:44,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:02:44,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:02:44,184 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2021-12-06 23:02:44,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:02:44,199 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:02:44,219 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2021-12-06 23:02:44,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:02:44,233 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:02:44,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:02:44 WrapperNode [2021-12-06 23:02:44,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:02:44,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:02:44,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:02:44,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:02:44,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:02:44" (1/1) ... [2021-12-06 23:02:44,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:02:44" (1/1) ... [2021-12-06 23:02:44,269 INFO L137 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 235 [2021-12-06 23:02:44,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:02:44,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:02:44,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:02:44,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:02:44,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:02:44" (1/1) ... [2021-12-06 23:02:44,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:02:44" (1/1) ... [2021-12-06 23:02:44,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:02:44" (1/1) ... [2021-12-06 23:02:44,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:02:44" (1/1) ... [2021-12-06 23:02:44,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:02:44" (1/1) ... [2021-12-06 23:02:44,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:02:44" (1/1) ... [2021-12-06 23:02:44,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:02:44" (1/1) ... [2021-12-06 23:02:44,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:02:44,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:02:44,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:02:44,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:02:44,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:02:44" (1/1) ... [2021-12-06 23:02:44,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:02:44,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:02:44,322 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:02:44,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:02:44,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:02:44,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 23:02:44,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:02:44,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 23:02:44,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 23:02:44,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 23:02:44,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 23:02:44,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 23:02:44,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-06 23:02:44,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-06 23:02:44,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:02:44,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-06 23:02:44,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-06 23:02:44,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 23:02:44,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:02:44,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:02:44,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 23:02:44,355 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 23:02:44,432 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:02:44,433 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:02:44,664 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:02:44,716 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:02:44,716 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 23:02:44,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:02:44 BoogieIcfgContainer [2021-12-06 23:02:44,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:02:44,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:02:44,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:02:44,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:02:44,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:02:44" (1/3) ... [2021-12-06 23:02:44,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3328bb8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:02:44, skipping insertion in model container [2021-12-06 23:02:44,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:02:44" (2/3) ... [2021-12-06 23:02:44,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3328bb8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:02:44, skipping insertion in model container [2021-12-06 23:02:44,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:02:44" (3/3) ... [2021-12-06 23:02:44,724 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2021-12-06 23:02:44,728 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 23:02:44,728 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:02:44,728 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:02:44,728 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 23:02:44,765 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,766 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,766 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,766 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,766 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,766 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,766 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,766 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,767 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,768 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,768 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,768 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,768 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,769 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,770 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,770 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,770 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,770 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,770 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,770 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,770 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,771 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,771 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,771 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,771 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,771 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,771 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,771 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,772 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,772 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,772 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,772 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,772 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,772 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,772 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,773 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,775 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,775 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,775 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,775 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,775 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,776 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,776 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,777 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,777 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,777 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,777 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,777 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,778 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,778 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,778 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,778 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 23:02:44,780 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-06 23:02:44,815 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:02:44,821 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:02:44,821 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-06 23:02:44,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 189 places, 186 transitions, 396 flow [2021-12-06 23:02:44,886 INFO L129 PetriNetUnfolder]: 7/183 cut-off events. [2021-12-06 23:02:44,886 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-06 23:02:44,888 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 183 events. 7/183 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 100 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 150. Up to 2 conditions per place. [2021-12-06 23:02:44,888 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 186 transitions, 396 flow [2021-12-06 23:02:44,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 172 transitions, 362 flow [2021-12-06 23:02:44,920 INFO L129 PetriNetUnfolder]: 7/171 cut-off events. [2021-12-06 23:02:44,920 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-06 23:02:44,921 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:02:44,921 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:02:44,922 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:02:44,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:02:44,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1585459092, now seen corresponding path program 1 times [2021-12-06 23:02:44,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:02:44,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219750908] [2021-12-06 23:02:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:02:44,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:02:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:02:45,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:02:45,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219750908] [2021-12-06 23:02:45,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219750908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:02:45,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:02:45,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:02:45,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579221250] [2021-12-06 23:02:45,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:02:45,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:02:45,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:02:45,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:02:45,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:02:45,153 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 186 [2021-12-06 23:02:45,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 172 transitions, 362 flow. Second operand has 2 states, 2 states have (on average 171.0) internal successors, (342), 2 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:45,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:02:45,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 186 [2021-12-06 23:02:45,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:02:45,317 INFO L129 PetriNetUnfolder]: 215/670 cut-off events. [2021-12-06 23:02:45,317 INFO L130 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2021-12-06 23:02:45,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 670 events. 215/670 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3318 event pairs, 214 based on Foata normal form. 6/665 useless extension candidates. Maximal degree in co-relation 942. Up to 370 conditions per place. [2021-12-06 23:02:45,325 INFO L132 encePairwiseOnDemand]: 180/186 looper letters, 17 selfloop transitions, 0 changer transitions 5/166 dead transitions. [2021-12-06 23:02:45,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 166 transitions, 384 flow [2021-12-06 23:02:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:02:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-06 23:02:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 347 transitions. [2021-12-06 23:02:45,335 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9327956989247311 [2021-12-06 23:02:45,336 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 347 transitions. [2021-12-06 23:02:45,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 347 transitions. [2021-12-06 23:02:45,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:02:45,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 347 transitions. [2021-12-06 23:02:45,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 173.5) internal successors, (347), 2 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:45,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:45,347 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:45,349 INFO L186 Difference]: Start difference. First operand has 175 places, 172 transitions, 362 flow. Second operand 2 states and 347 transitions. [2021-12-06 23:02:45,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 166 transitions, 384 flow [2021-12-06 23:02:45,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 166 transitions, 372 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-06 23:02:45,356 INFO L242 Difference]: Finished difference. Result has 170 places, 161 transitions, 328 flow [2021-12-06 23:02:45,358 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=328, PETRI_PLACES=170, PETRI_TRANSITIONS=161} [2021-12-06 23:02:45,360 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, -5 predicate places. [2021-12-06 23:02:45,361 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 161 transitions, 328 flow [2021-12-06 23:02:45,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 171.0) internal successors, (342), 2 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:45,361 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:02:45,361 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:02:45,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:02:45,362 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:02:45,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:02:45,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1309777273, now seen corresponding path program 1 times [2021-12-06 23:02:45,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:02:45,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993021047] [2021-12-06 23:02:45,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:02:45,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:02:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:02:45,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:02:45,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993021047] [2021-12-06 23:02:45,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993021047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:02:45,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:02:45,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:02:45,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069601550] [2021-12-06 23:02:45,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:02:45,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:02:45,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:02:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:02:45,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:02:45,646 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 186 [2021-12-06 23:02:45,648 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 161 transitions, 328 flow. Second operand has 7 states, 7 states have (on average 147.57142857142858) internal successors, (1033), 7 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:45,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:02:45,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 186 [2021-12-06 23:02:45,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:02:45,881 INFO L129 PetriNetUnfolder]: 275/841 cut-off events. [2021-12-06 23:02:45,882 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2021-12-06 23:02:45,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 841 events. 275/841 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4309 event pairs, 274 based on Foata normal form. 41/873 useless extension candidates. Maximal degree in co-relation 1400. Up to 382 conditions per place. [2021-12-06 23:02:45,889 INFO L132 encePairwiseOnDemand]: 176/186 looper letters, 34 selfloop transitions, 6 changer transitions 13/178 dead transitions. [2021-12-06 23:02:45,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 178 transitions, 471 flow [2021-12-06 23:02:45,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:02:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 23:02:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1057 transitions. [2021-12-06 23:02:45,894 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8118279569892473 [2021-12-06 23:02:45,894 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1057 transitions. [2021-12-06 23:02:45,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1057 transitions. [2021-12-06 23:02:45,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:02:45,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1057 transitions. [2021-12-06 23:02:45,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 151.0) internal successors, (1057), 7 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:45,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:45,904 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:45,904 INFO L186 Difference]: Start difference. First operand has 170 places, 161 transitions, 328 flow. Second operand 7 states and 1057 transitions. [2021-12-06 23:02:45,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 178 transitions, 471 flow [2021-12-06 23:02:45,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 178 transitions, 471 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 23:02:45,909 INFO L242 Difference]: Finished difference. Result has 173 places, 162 transitions, 354 flow [2021-12-06 23:02:45,910 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=354, PETRI_PLACES=173, PETRI_TRANSITIONS=162} [2021-12-06 23:02:45,910 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, -2 predicate places. [2021-12-06 23:02:45,911 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 162 transitions, 354 flow [2021-12-06 23:02:45,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.57142857142858) internal successors, (1033), 7 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:45,912 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:02:45,912 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:02:45,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:02:45,913 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:02:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:02:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash 710443097, now seen corresponding path program 1 times [2021-12-06 23:02:45,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:02:45,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817255542] [2021-12-06 23:02:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:02:45,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:02:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:02:46,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:02:46,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817255542] [2021-12-06 23:02:46,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817255542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:02:46,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:02:46,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:02:46,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895124016] [2021-12-06 23:02:46,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:02:46,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:02:46,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:02:46,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:02:46,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:02:46,070 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 186 [2021-12-06 23:02:46,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 162 transitions, 354 flow. Second operand has 7 states, 7 states have (on average 152.42857142857142) internal successors, (1067), 7 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:46,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:02:46,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 186 [2021-12-06 23:02:46,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:02:46,483 INFO L129 PetriNetUnfolder]: 1031/2322 cut-off events. [2021-12-06 23:02:46,483 INFO L130 PetriNetUnfolder]: For 213/213 co-relation queries the response was YES. [2021-12-06 23:02:46,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4495 conditions, 2322 events. 1031/2322 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15973 event pairs, 364 based on Foata normal form. 25/2314 useless extension candidates. Maximal degree in co-relation 4489. Up to 511 conditions per place. [2021-12-06 23:02:46,499 INFO L132 encePairwiseOnDemand]: 176/186 looper letters, 91 selfloop transitions, 18 changer transitions 0/240 dead transitions. [2021-12-06 23:02:46,499 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 240 transitions, 768 flow [2021-12-06 23:02:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:02:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-06 23:02:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1442 transitions. [2021-12-06 23:02:46,503 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8614097968936678 [2021-12-06 23:02:46,504 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1442 transitions. [2021-12-06 23:02:46,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1442 transitions. [2021-12-06 23:02:46,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:02:46,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1442 transitions. [2021-12-06 23:02:46,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.22222222222223) internal successors, (1442), 9 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:46,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 186.0) internal successors, (1860), 10 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:46,514 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 186.0) internal successors, (1860), 10 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:46,514 INFO L186 Difference]: Start difference. First operand has 173 places, 162 transitions, 354 flow. Second operand 9 states and 1442 transitions. [2021-12-06 23:02:46,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 240 transitions, 768 flow [2021-12-06 23:02:46,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 240 transitions, 758 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 23:02:46,533 INFO L242 Difference]: Finished difference. Result has 181 places, 176 transitions, 448 flow [2021-12-06 23:02:46,533 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=448, PETRI_PLACES=181, PETRI_TRANSITIONS=176} [2021-12-06 23:02:46,534 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 6 predicate places. [2021-12-06 23:02:46,534 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 176 transitions, 448 flow [2021-12-06 23:02:46,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.42857142857142) internal successors, (1067), 7 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:46,535 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:02:46,535 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:02:46,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:02:46,536 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:02:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:02:46,537 INFO L85 PathProgramCache]: Analyzing trace with hash 446910751, now seen corresponding path program 2 times [2021-12-06 23:02:46,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:02:46,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621931849] [2021-12-06 23:02:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:02:46,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:02:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:02:47,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:02:47,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621931849] [2021-12-06 23:02:47,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621931849] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:02:47,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402386681] [2021-12-06 23:02:47,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:02:47,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:02:47,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:02:47,413 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:02:47,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:02:47,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 23:02:47,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:02:47,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:02:47,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:02:48,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:02:48,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:02:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:02:48,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:02:48,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402386681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:02:48,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:02:48,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [27] total 34 [2021-12-06 23:02:48,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965596715] [2021-12-06 23:02:48,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:02:48,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:02:48,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:02:48,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:02:48,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 23:02:48,055 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2021-12-06 23:02:48,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 176 transitions, 448 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:48,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:02:48,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2021-12-06 23:02:48,057 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:02:48,971 INFO L129 PetriNetUnfolder]: 2876/6237 cut-off events. [2021-12-06 23:02:48,971 INFO L130 PetriNetUnfolder]: For 893/902 co-relation queries the response was YES. [2021-12-06 23:02:48,989 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12431 conditions, 6237 events. 2876/6237 cut-off events. For 893/902 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 51789 event pairs, 998 based on Foata normal form. 7/6069 useless extension candidates. Maximal degree in co-relation 12420. Up to 3361 conditions per place. [2021-12-06 23:02:49,022 INFO L132 encePairwiseOnDemand]: 159/186 looper letters, 101 selfloop transitions, 39 changer transitions 4/262 dead transitions. [2021-12-06 23:02:49,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 262 transitions, 954 flow [2021-12-06 23:02:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:02:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-06 23:02:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1769 transitions. [2021-12-06 23:02:49,028 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6793394777265745 [2021-12-06 23:02:49,028 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1769 transitions. [2021-12-06 23:02:49,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1769 transitions. [2021-12-06 23:02:49,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:02:49,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1769 transitions. [2021-12-06 23:02:49,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.35714285714286) internal successors, (1769), 14 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:49,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 186.0) internal successors, (2790), 15 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:49,041 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 186.0) internal successors, (2790), 15 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:49,041 INFO L186 Difference]: Start difference. First operand has 181 places, 176 transitions, 448 flow. Second operand 14 states and 1769 transitions. [2021-12-06 23:02:49,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 262 transitions, 954 flow [2021-12-06 23:02:49,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 262 transitions, 954 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 23:02:49,051 INFO L242 Difference]: Finished difference. Result has 202 places, 211 transitions, 728 flow [2021-12-06 23:02:49,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=728, PETRI_PLACES=202, PETRI_TRANSITIONS=211} [2021-12-06 23:02:49,052 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 27 predicate places. [2021-12-06 23:02:49,052 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 211 transitions, 728 flow [2021-12-06 23:02:49,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:49,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:02:49,053 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:02:49,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:02:49,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:02:49,256 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:02:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:02:49,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1704759723, now seen corresponding path program 3 times [2021-12-06 23:02:49,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:02:49,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410735173] [2021-12-06 23:02:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:02:49,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:02:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:02:49,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:02:49,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410735173] [2021-12-06 23:02:49,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410735173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:02:49,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:02:49,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:02:49,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349479869] [2021-12-06 23:02:49,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:02:49,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:02:49,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:02:49,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:02:49,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:02:49,476 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 186 [2021-12-06 23:02:49,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 211 transitions, 728 flow. Second operand has 7 states, 7 states have (on average 152.42857142857142) internal successors, (1067), 7 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:49,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:02:49,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 186 [2021-12-06 23:02:49,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:02:50,155 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([565] L120-->L123: Formula: (and (not (= |v_thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1_1| 0)) (= |v_thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_1| (ite (and (< v_~j~0_30 v_~n~0_30) (<= 0 v_~j~0_30)) 1 0)) (= |v_thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_1| |v_thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1_1|)) InVars {~n~0=v_~n~0_30, ~j~0=v_~j~0_30} OutVars{thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1=|v_thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_1|, ~j~0=v_~j~0_30, ~n~0=v_~n~0_30, thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1=|v_thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1_1|} AuxVars[] AssignedVars[thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1, thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1][233], [Black: 760#(and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)), Black: 624#(= ~j~0 ~i1~0), 235#true, Black: 214#(= ~tmp2~0 0), Black: 213#(= ~n1~0 0), Black: 219#(and (= ~tmp2~0 0) (= ~n1~0 0)), 192#true, Black: 222#(and (= ~tmp2~0 0) (<= 1 ~n2~0) (= ~n1~0 0)), Black: 228#(and (= ~tmp2~0 0) (<= 1 ~n2~0) (<= ~n2~0 ~tmp1~0) (<= (+ ~n2~0 1) ~n1~0)), 155#L123true, 38#L68true, Black: 205#(and (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 0)), Black: 207#(and (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_#in~size#1|) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (= |ULTIMATE.start_create_fresh_int_array_~i~1#1| 0) (<= ~n~0 0)), 787#(and (<= 1 ~n1~0) (= ~tmp1~0 0)), 143#L156-1true, Black: 260#(= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0), 11#L106true, Black: 666#(exists ((v_~j~0_32 Int)) (and (= ~j~0 (select (select |#memory_int| ~f~0.base) (+ (* (select (select |#memory_int| ~f~0.base) (+ (* v_~j~0_32 4) ~f~0.offset)) 4) ~f~0.offset))) (= (select (select |#memory_int| ~f~0.base) (+ (* v_~j~0_32 4) ~f~0.offset)) ~i~0))), Black: 758#(and (exists ((v_~j~0_32 Int)) (and (= ~j~0 (select (select |#memory_int| ~f~0.base) (+ (* (select (select |#memory_int| ~f~0.base) (+ (* v_~j~0_32 4) ~f~0.offset)) 4) ~f~0.offset))) (= (select (select |#memory_int| ~f~0.base) (+ (* v_~j~0_32 4) ~f~0.offset)) ~i2~0))) (exists ((v_~j~0_32 Int)) (and (= ~j~0 (select (select |#memory_int| ~f~0.base) (+ (* (select (select |#memory_int| ~f~0.base) (+ (* v_~j~0_32 4) ~f~0.offset)) 4) ~f~0.offset))) (= (select (select |#memory_int| ~f~0.base) (+ (* v_~j~0_32 4) ~f~0.offset)) ~i~0)))), 226#(and (= ~tmp2~0 0) (<= 1 ~n2~0)), Black: 756#(and (= ~j~0 ~i1~0) (= ~i~0 (select (select |#memory_int| ~f~0.base) (+ (* ~j~0 4) ~f~0.offset)))), Black: 659#(exists ((v_~j~0_32 Int)) (and (= (select (select |#memory_int| ~f~0.base) (+ (* v_~j~0_32 4) ~f~0.offset)) ~j~0) (= (select (select |#memory_int| ~f~0.base) (+ (* v_~j~0_32 4) ~f~0.offset)) ~i~0))), Black: 259#(= ~j~0 ~i~0)]) [2021-12-06 23:02:50,156 INFO L384 tUnfolder$Statistics]: this new event has 134 ancestors and is cut-off event [2021-12-06 23:02:50,156 INFO L387 tUnfolder$Statistics]: existing Event has 134 ancestors and is cut-off event [2021-12-06 23:02:50,156 INFO L387 tUnfolder$Statistics]: existing Event has 134 ancestors and is cut-off event [2021-12-06 23:02:50,156 INFO L387 tUnfolder$Statistics]: existing Event has 134 ancestors and is cut-off event [2021-12-06 23:02:50,431 INFO L129 PetriNetUnfolder]: 2909/6236 cut-off events. [2021-12-06 23:02:50,431 INFO L130 PetriNetUnfolder]: For 9269/9732 co-relation queries the response was YES. [2021-12-06 23:02:50,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19615 conditions, 6236 events. 2909/6236 cut-off events. For 9269/9732 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 50351 event pairs, 915 based on Foata normal form. 118/6104 useless extension candidates. Maximal degree in co-relation 19595. Up to 1873 conditions per place. [2021-12-06 23:02:50,492 INFO L132 encePairwiseOnDemand]: 176/186 looper letters, 160 selfloop transitions, 24 changer transitions 0/327 dead transitions. [2021-12-06 23:02:50,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 327 transitions, 1716 flow [2021-12-06 23:02:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:02:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-06 23:02:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1439 transitions. [2021-12-06 23:02:50,497 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8596176821983273 [2021-12-06 23:02:50,497 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1439 transitions. [2021-12-06 23:02:50,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1439 transitions. [2021-12-06 23:02:50,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:02:50,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1439 transitions. [2021-12-06 23:02:50,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 159.88888888888889) internal successors, (1439), 9 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:50,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 186.0) internal successors, (1860), 10 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:50,505 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 186.0) internal successors, (1860), 10 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:50,505 INFO L186 Difference]: Start difference. First operand has 202 places, 211 transitions, 728 flow. Second operand 9 states and 1439 transitions. [2021-12-06 23:02:50,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 327 transitions, 1716 flow [2021-12-06 23:02:50,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 327 transitions, 1702 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-12-06 23:02:50,528 INFO L242 Difference]: Finished difference. Result has 205 places, 217 transitions, 827 flow [2021-12-06 23:02:50,528 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=827, PETRI_PLACES=205, PETRI_TRANSITIONS=217} [2021-12-06 23:02:50,529 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 30 predicate places. [2021-12-06 23:02:50,529 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 217 transitions, 827 flow [2021-12-06 23:02:50,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.42857142857142) internal successors, (1067), 7 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:50,530 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:02:50,530 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:02:50,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:02:50,530 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:02:50,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:02:50,531 INFO L85 PathProgramCache]: Analyzing trace with hash 953942505, now seen corresponding path program 4 times [2021-12-06 23:02:50,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:02:50,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472141977] [2021-12-06 23:02:50,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:02:50,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:02:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:02:51,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:02:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472141977] [2021-12-06 23:02:51,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472141977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:02:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53911395] [2021-12-06 23:02:51,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:02:51,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:02:51,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:02:51,216 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:02:51,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:02:51,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:02:51,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:02:51,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 23:02:51,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:02:51,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:02:51,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:02:51,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2021-12-06 23:02:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:02:51,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:02:51,981 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 23:02:51,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 23:02:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:02:52,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53911395] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:02:52,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:02:52,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 15] total 43 [2021-12-06 23:02:52,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013629759] [2021-12-06 23:02:52,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:02:52,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 23:02:52,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:02:52,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 23:02:52,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 23:02:52,420 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 186 [2021-12-06 23:02:52,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 217 transitions, 827 flow. Second operand has 43 states, 43 states have (on average 102.95348837209302) internal successors, (4427), 43 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:52,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:02:52,424 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 186 [2021-12-06 23:02:52,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:02:56,169 INFO L129 PetriNetUnfolder]: 4940/11324 cut-off events. [2021-12-06 23:02:56,169 INFO L130 PetriNetUnfolder]: For 18890/19957 co-relation queries the response was YES. [2021-12-06 23:02:56,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36883 conditions, 11324 events. 4940/11324 cut-off events. For 18890/19957 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 108402 event pairs, 1769 based on Foata normal form. 107/11163 useless extension candidates. Maximal degree in co-relation 36861. Up to 4068 conditions per place. [2021-12-06 23:02:56,237 INFO L132 encePairwiseOnDemand]: 143/186 looper letters, 226 selfloop transitions, 85 changer transitions 114/531 dead transitions. [2021-12-06 23:02:56,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 531 transitions, 3385 flow [2021-12-06 23:02:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 23:02:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-12-06 23:02:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 5340 transitions. [2021-12-06 23:02:56,249 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5629348513598988 [2021-12-06 23:02:56,249 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 5340 transitions. [2021-12-06 23:02:56,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 5340 transitions. [2021-12-06 23:02:56,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:02:56,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 5340 transitions. [2021-12-06 23:02:56,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 104.70588235294117) internal successors, (5340), 51 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:56,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 186.0) internal successors, (9672), 52 states have internal predecessors, (9672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:56,277 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 186.0) internal successors, (9672), 52 states have internal predecessors, (9672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:56,277 INFO L186 Difference]: Start difference. First operand has 205 places, 217 transitions, 827 flow. Second operand 51 states and 5340 transitions. [2021-12-06 23:02:56,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 531 transitions, 3385 flow [2021-12-06 23:02:56,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 531 transitions, 3349 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-12-06 23:02:56,326 INFO L242 Difference]: Finished difference. Result has 278 places, 296 transitions, 1604 flow [2021-12-06 23:02:56,326 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1604, PETRI_PLACES=278, PETRI_TRANSITIONS=296} [2021-12-06 23:02:56,327 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 103 predicate places. [2021-12-06 23:02:56,327 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 296 transitions, 1604 flow [2021-12-06 23:02:56,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 102.95348837209302) internal successors, (4427), 43 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:56,329 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:02:56,329 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:02:56,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:02:56,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 23:02:56,530 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:02:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:02:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash 169667949, now seen corresponding path program 5 times [2021-12-06 23:02:56,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:02:56,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812656771] [2021-12-06 23:02:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:02:56,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:02:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:02:57,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:02:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812656771] [2021-12-06 23:02:57,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812656771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:02:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378507312] [2021-12-06 23:02:57,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:02:57,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:02:57,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:02:57,161 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:02:57,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:02:57,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:02:57,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:02:57,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 23:02:57,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:02:57,872 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-06 23:02:57,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2021-12-06 23:02:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:02:57,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:02:58,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:02:58,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 36 [2021-12-06 23:02:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:02:58,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378507312] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:02:58,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:02:58,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 20] total 55 [2021-12-06 23:02:58,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237448675] [2021-12-06 23:02:58,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:02:58,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 23:02:58,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:02:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 23:02:58,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=2621, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 23:02:58,750 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 186 [2021-12-06 23:02:58,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 296 transitions, 1604 flow. Second operand has 55 states, 55 states have (on average 102.21818181818182) internal successors, (5622), 55 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:02:58,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:02:58,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 186 [2021-12-06 23:02:58,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:03:03,409 INFO L129 PetriNetUnfolder]: 6118/14300 cut-off events. [2021-12-06 23:03:03,409 INFO L130 PetriNetUnfolder]: For 50943/51933 co-relation queries the response was YES. [2021-12-06 23:03:03,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58889 conditions, 14300 events. 6118/14300 cut-off events. For 50943/51933 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 146845 event pairs, 1387 based on Foata normal form. 113/14100 useless extension candidates. Maximal degree in co-relation 58842. Up to 4963 conditions per place. [2021-12-06 23:03:03,512 INFO L132 encePairwiseOnDemand]: 144/186 looper letters, 131 selfloop transitions, 18 changer transitions 357/612 dead transitions. [2021-12-06 23:03:03,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 612 transitions, 5011 flow [2021-12-06 23:03:03,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 23:03:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-06 23:03:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4975 transitions. [2021-12-06 23:03:03,519 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5690917410203614 [2021-12-06 23:03:03,519 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4975 transitions. [2021-12-06 23:03:03,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4975 transitions. [2021-12-06 23:03:03,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:03:03,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4975 transitions. [2021-12-06 23:03:03,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 105.85106382978724) internal successors, (4975), 47 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:03,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 186.0) internal successors, (8928), 48 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:03,540 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 186.0) internal successors, (8928), 48 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:03,541 INFO L186 Difference]: Start difference. First operand has 278 places, 296 transitions, 1604 flow. Second operand 47 states and 4975 transitions. [2021-12-06 23:03:03,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 612 transitions, 5011 flow [2021-12-06 23:03:03,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 612 transitions, 4833 flow, removed 77 selfloop flow, removed 11 redundant places. [2021-12-06 23:03:03,830 INFO L242 Difference]: Finished difference. Result has 325 places, 221 transitions, 1065 flow [2021-12-06 23:03:03,831 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1065, PETRI_PLACES=325, PETRI_TRANSITIONS=221} [2021-12-06 23:03:03,831 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 150 predicate places. [2021-12-06 23:03:03,831 INFO L470 AbstractCegarLoop]: Abstraction has has 325 places, 221 transitions, 1065 flow [2021-12-06 23:03:03,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 102.21818181818182) internal successors, (5622), 55 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:03,833 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:03:03,833 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:03,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:03:04,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 23:03:04,035 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:03:04,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:04,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1835197525, now seen corresponding path program 6 times [2021-12-06 23:03:04,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:04,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689743632] [2021-12-06 23:03:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:04,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:04,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:04,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689743632] [2021-12-06 23:03:04,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689743632] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:04,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004657574] [2021-12-06 23:03:04,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:03:04,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:04,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:03:04,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:03:04,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:03:04,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-12-06 23:03:04,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:03:04,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 23:03:04,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:03:05,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:03:05,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:03:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:03:05,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:03:05,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004657574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:03:05,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:03:05,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [28] total 36 [2021-12-06 23:03:05,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299289220] [2021-12-06 23:03:05,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:05,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:03:05,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:05,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:03:05,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:03:05,186 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 186 [2021-12-06 23:03:05,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 221 transitions, 1065 flow. Second operand has 13 states, 13 states have (on average 115.84615384615384) internal successors, (1506), 13 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:05,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:03:05,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 186 [2021-12-06 23:03:05,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:03:06,741 INFO L129 PetriNetUnfolder]: 4037/8584 cut-off events. [2021-12-06 23:03:06,741 INFO L130 PetriNetUnfolder]: For 59927/60367 co-relation queries the response was YES. [2021-12-06 23:03:06,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41685 conditions, 8584 events. 4037/8584 cut-off events. For 59927/60367 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 73999 event pairs, 484 based on Foata normal form. 110/8638 useless extension candidates. Maximal degree in co-relation 41624. Up to 3039 conditions per place. [2021-12-06 23:03:06,830 INFO L132 encePairwiseOnDemand]: 160/186 looper letters, 181 selfloop transitions, 80 changer transitions 4/378 dead transitions. [2021-12-06 23:03:06,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 378 transitions, 3043 flow [2021-12-06 23:03:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:03:06,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 23:03:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1965 transitions. [2021-12-06 23:03:06,833 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6602822580645161 [2021-12-06 23:03:06,833 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1965 transitions. [2021-12-06 23:03:06,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1965 transitions. [2021-12-06 23:03:06,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:03:06,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1965 transitions. [2021-12-06 23:03:06,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 122.8125) internal successors, (1965), 16 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:06,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:06,838 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:06,838 INFO L186 Difference]: Start difference. First operand has 325 places, 221 transitions, 1065 flow. Second operand 16 states and 1965 transitions. [2021-12-06 23:03:06,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 378 transitions, 3043 flow [2021-12-06 23:03:07,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 378 transitions, 2646 flow, removed 183 selfloop flow, removed 43 redundant places. [2021-12-06 23:03:07,235 INFO L242 Difference]: Finished difference. Result has 242 places, 269 transitions, 1716 flow [2021-12-06 23:03:07,236 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1716, PETRI_PLACES=242, PETRI_TRANSITIONS=269} [2021-12-06 23:03:07,236 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 67 predicate places. [2021-12-06 23:03:07,237 INFO L470 AbstractCegarLoop]: Abstraction has has 242 places, 269 transitions, 1716 flow [2021-12-06 23:03:07,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 115.84615384615384) internal successors, (1506), 13 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:07,237 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:03:07,238 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:07,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:03:07,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:07,440 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:03:07,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:07,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1298794579, now seen corresponding path program 7 times [2021-12-06 23:03:07,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:07,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311377511] [2021-12-06 23:03:07,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:07,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:08,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:08,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311377511] [2021-12-06 23:03:08,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311377511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:08,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093276796] [2021-12-06 23:03:08,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:03:08,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:08,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:03:08,161 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:03:08,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:03:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:08,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 23:03:08,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:03:08,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:03:08,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:03:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:03:08,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:03:08,760 INFO L354 Elim1Store]: treesize reduction 14, result has 80.8 percent of original size [2021-12-06 23:03:08,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 78 [2021-12-06 23:03:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:03:08,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093276796] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:08,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:03:08,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [28, 15] total 43 [2021-12-06 23:03:08,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137875743] [2021-12-06 23:03:08,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:08,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:03:08,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:08,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:03:08,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1678, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 23:03:08,968 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2021-12-06 23:03:08,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 269 transitions, 1716 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:08,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:03:08,970 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2021-12-06 23:03:08,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:03:10,727 INFO L129 PetriNetUnfolder]: 4168/9174 cut-off events. [2021-12-06 23:03:10,727 INFO L130 PetriNetUnfolder]: For 65985/66632 co-relation queries the response was YES. [2021-12-06 23:03:10,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48440 conditions, 9174 events. 4168/9174 cut-off events. For 65985/66632 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 83085 event pairs, 644 based on Foata normal form. 138/9213 useless extension candidates. Maximal degree in co-relation 48400. Up to 3357 conditions per place. [2021-12-06 23:03:10,816 INFO L132 encePairwiseOnDemand]: 172/186 looper letters, 194 selfloop transitions, 79 changer transitions 8/414 dead transitions. [2021-12-06 23:03:10,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 414 transitions, 3807 flow [2021-12-06 23:03:10,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:03:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-06 23:03:10,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1927 transitions. [2021-12-06 23:03:10,818 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6906810035842293 [2021-12-06 23:03:10,818 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1927 transitions. [2021-12-06 23:03:10,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1927 transitions. [2021-12-06 23:03:10,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:03:10,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1927 transitions. [2021-12-06 23:03:10,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.46666666666667) internal successors, (1927), 15 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:10,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:10,823 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:10,823 INFO L186 Difference]: Start difference. First operand has 242 places, 269 transitions, 1716 flow. Second operand 15 states and 1927 transitions. [2021-12-06 23:03:10,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 414 transitions, 3807 flow [2021-12-06 23:03:11,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 414 transitions, 3519 flow, removed 140 selfloop flow, removed 9 redundant places. [2021-12-06 23:03:11,030 INFO L242 Difference]: Finished difference. Result has 251 places, 317 transitions, 2295 flow [2021-12-06 23:03:11,030 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2295, PETRI_PLACES=251, PETRI_TRANSITIONS=317} [2021-12-06 23:03:11,031 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 76 predicate places. [2021-12-06 23:03:11,031 INFO L470 AbstractCegarLoop]: Abstraction has has 251 places, 317 transitions, 2295 flow [2021-12-06 23:03:11,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:11,031 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:03:11,032 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:11,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:03:11,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:11,234 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:03:11,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:11,235 INFO L85 PathProgramCache]: Analyzing trace with hash -29422429, now seen corresponding path program 8 times [2021-12-06 23:03:11,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:11,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591679229] [2021-12-06 23:03:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:11,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:11,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:11,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591679229] [2021-12-06 23:03:11,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591679229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:11,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518869917] [2021-12-06 23:03:11,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:03:11,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:11,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:03:11,770 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:03:11,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:03:11,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 23:03:11,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:03:11,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:03:11,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:03:12,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:03:12,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:03:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:03:12,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:03:12,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518869917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:03:12,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:03:12,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [28] total 35 [2021-12-06 23:03:12,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615484653] [2021-12-06 23:03:12,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:12,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:03:12,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:03:12,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1099, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 23:03:12,161 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2021-12-06 23:03:12,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 317 transitions, 2295 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:12,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:03:12,162 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2021-12-06 23:03:12,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:03:13,940 INFO L129 PetriNetUnfolder]: 4372/9624 cut-off events. [2021-12-06 23:03:13,941 INFO L130 PetriNetUnfolder]: For 67907/68798 co-relation queries the response was YES. [2021-12-06 23:03:13,997 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51842 conditions, 9624 events. 4372/9624 cut-off events. For 67907/68798 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 87185 event pairs, 976 based on Foata normal form. 153/9668 useless extension candidates. Maximal degree in co-relation 51800. Up to 4305 conditions per place. [2021-12-06 23:03:14,047 INFO L132 encePairwiseOnDemand]: 164/186 looper letters, 173 selfloop transitions, 115 changer transitions 7/428 dead transitions. [2021-12-06 23:03:14,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 428 transitions, 4062 flow [2021-12-06 23:03:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:03:14,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-06 23:03:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1890 transitions. [2021-12-06 23:03:14,050 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6774193548387096 [2021-12-06 23:03:14,050 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1890 transitions. [2021-12-06 23:03:14,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1890 transitions. [2021-12-06 23:03:14,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:03:14,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1890 transitions. [2021-12-06 23:03:14,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:14,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:14,056 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:14,056 INFO L186 Difference]: Start difference. First operand has 251 places, 317 transitions, 2295 flow. Second operand 15 states and 1890 transitions. [2021-12-06 23:03:14,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 428 transitions, 4062 flow [2021-12-06 23:03:14,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 428 transitions, 3812 flow, removed 123 selfloop flow, removed 5 redundant places. [2021-12-06 23:03:14,214 INFO L242 Difference]: Finished difference. Result has 264 places, 367 transitions, 3081 flow [2021-12-06 23:03:14,215 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3081, PETRI_PLACES=264, PETRI_TRANSITIONS=367} [2021-12-06 23:03:14,215 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 89 predicate places. [2021-12-06 23:03:14,215 INFO L470 AbstractCegarLoop]: Abstraction has has 264 places, 367 transitions, 3081 flow [2021-12-06 23:03:14,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:14,216 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:03:14,216 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:14,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:03:14,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 23:03:14,418 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:03:14,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:14,419 INFO L85 PathProgramCache]: Analyzing trace with hash -133996611, now seen corresponding path program 9 times [2021-12-06 23:03:14,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:14,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039649777] [2021-12-06 23:03:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:14,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:14,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:14,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039649777] [2021-12-06 23:03:14,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039649777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:14,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429270209] [2021-12-06 23:03:14,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:03:14,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:14,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:03:14,882 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:03:14,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:03:14,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-12-06 23:03:14,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:03:14,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:03:14,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:03:15,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:03:15,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:03:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:03:15,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:03:15,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429270209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:03:15,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:03:15,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [27] total 34 [2021-12-06 23:03:15,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732283861] [2021-12-06 23:03:15,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:15,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:03:15,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:15,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:03:15,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 23:03:15,284 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2021-12-06 23:03:15,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 367 transitions, 3081 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:15,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:03:15,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2021-12-06 23:03:15,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:03:17,138 INFO L129 PetriNetUnfolder]: 4580/10199 cut-off events. [2021-12-06 23:03:17,138 INFO L130 PetriNetUnfolder]: For 95161/96112 co-relation queries the response was YES. [2021-12-06 23:03:17,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59900 conditions, 10199 events. 4580/10199 cut-off events. For 95161/96112 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 94003 event pairs, 775 based on Foata normal form. 175/10275 useless extension candidates. Maximal degree in co-relation 59854. Up to 4649 conditions per place. [2021-12-06 23:03:17,328 INFO L132 encePairwiseOnDemand]: 162/186 looper letters, 184 selfloop transitions, 154 changer transitions 13/484 dead transitions. [2021-12-06 23:03:17,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 484 transitions, 5185 flow [2021-12-06 23:03:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:03:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-06 23:03:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1890 transitions. [2021-12-06 23:03:17,330 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6774193548387096 [2021-12-06 23:03:17,330 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1890 transitions. [2021-12-06 23:03:17,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1890 transitions. [2021-12-06 23:03:17,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:03:17,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1890 transitions. [2021-12-06 23:03:17,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.0) internal successors, (1890), 15 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:17,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:17,335 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:17,335 INFO L186 Difference]: Start difference. First operand has 264 places, 367 transitions, 3081 flow. Second operand 15 states and 1890 transitions. [2021-12-06 23:03:17,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 484 transitions, 5185 flow [2021-12-06 23:03:17,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 484 transitions, 4864 flow, removed 149 selfloop flow, removed 8 redundant places. [2021-12-06 23:03:17,505 INFO L242 Difference]: Finished difference. Result has 274 places, 420 transitions, 4046 flow [2021-12-06 23:03:17,505 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=2912, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4046, PETRI_PLACES=274, PETRI_TRANSITIONS=420} [2021-12-06 23:03:17,506 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 99 predicate places. [2021-12-06 23:03:17,506 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 420 transitions, 4046 flow [2021-12-06 23:03:17,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:17,506 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:03:17,506 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:17,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:03:17,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:17,708 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:03:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:17,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1732526931, now seen corresponding path program 10 times [2021-12-06 23:03:17,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:17,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473408649] [2021-12-06 23:03:17,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:17,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:18,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:18,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473408649] [2021-12-06 23:03:18,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473408649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:18,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445690054] [2021-12-06 23:03:18,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:03:18,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:18,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:03:18,163 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:03:18,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:03:18,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:03:18,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:03:18,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 23:03:18,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:03:18,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:03:18,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:03:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:03:18,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:03:18,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445690054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:03:18,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:03:18,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [27] total 35 [2021-12-06 23:03:18,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547551878] [2021-12-06 23:03:18,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:18,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:03:18,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:18,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:03:18,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 23:03:18,563 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 186 [2021-12-06 23:03:18,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 420 transitions, 4046 flow. Second operand has 13 states, 13 states have (on average 116.76923076923077) internal successors, (1518), 13 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:18,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:03:18,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 186 [2021-12-06 23:03:18,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:03:20,879 INFO L129 PetriNetUnfolder]: 5154/11681 cut-off events. [2021-12-06 23:03:20,879 INFO L130 PetriNetUnfolder]: For 129868/130847 co-relation queries the response was YES. [2021-12-06 23:03:20,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75149 conditions, 11681 events. 5154/11681 cut-off events. For 129868/130847 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 112073 event pairs, 1247 based on Foata normal form. 144/11658 useless extension candidates. Maximal degree in co-relation 75099. Up to 6892 conditions per place. [2021-12-06 23:03:21,026 INFO L132 encePairwiseOnDemand]: 156/186 looper letters, 300 selfloop transitions, 126 changer transitions 7/562 dead transitions. [2021-12-06 23:03:21,026 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 562 transitions, 6874 flow [2021-12-06 23:03:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:03:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-06 23:03:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1828 transitions. [2021-12-06 23:03:21,029 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6551971326164875 [2021-12-06 23:03:21,029 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1828 transitions. [2021-12-06 23:03:21,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1828 transitions. [2021-12-06 23:03:21,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:03:21,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1828 transitions. [2021-12-06 23:03:21,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 121.86666666666666) internal successors, (1828), 15 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:21,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:21,035 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:21,035 INFO L186 Difference]: Start difference. First operand has 274 places, 420 transitions, 4046 flow. Second operand 15 states and 1828 transitions. [2021-12-06 23:03:21,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 562 transitions, 6874 flow [2021-12-06 23:03:21,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 562 transitions, 6763 flow, removed 12 selfloop flow, removed 9 redundant places. [2021-12-06 23:03:21,330 INFO L242 Difference]: Finished difference. Result has 283 places, 500 transitions, 5675 flow [2021-12-06 23:03:21,331 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=3941, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5675, PETRI_PLACES=283, PETRI_TRANSITIONS=500} [2021-12-06 23:03:21,331 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 108 predicate places. [2021-12-06 23:03:21,331 INFO L470 AbstractCegarLoop]: Abstraction has has 283 places, 500 transitions, 5675 flow [2021-12-06 23:03:21,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 116.76923076923077) internal successors, (1518), 13 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:21,331 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:03:21,332 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:21,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:03:21,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:21,534 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:03:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:21,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1620285105, now seen corresponding path program 11 times [2021-12-06 23:03:21,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:21,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838536963] [2021-12-06 23:03:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:21,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:22,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838536963] [2021-12-06 23:03:22,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838536963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979941603] [2021-12-06 23:03:22,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:03:22,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:22,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:03:22,043 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:03:22,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:03:22,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 23:03:22,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:03:22,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 23:03:22,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:03:22,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:03:22,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:03:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:03:22,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:03:22,674 INFO L354 Elim1Store]: treesize reduction 14, result has 80.8 percent of original size [2021-12-06 23:03:22,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 78 [2021-12-06 23:03:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:03:22,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979941603] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:22,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:03:22,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [27, 15] total 43 [2021-12-06 23:03:22,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853219492] [2021-12-06 23:03:22,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:22,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:03:22,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:22,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:03:22,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1670, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 23:03:22,873 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2021-12-06 23:03:22,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 500 transitions, 5675 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:22,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:03:22,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2021-12-06 23:03:22,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:03:26,344 INFO L129 PetriNetUnfolder]: 6120/14007 cut-off events. [2021-12-06 23:03:26,344 INFO L130 PetriNetUnfolder]: For 209153/210226 co-relation queries the response was YES. [2021-12-06 23:03:26,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101159 conditions, 14007 events. 6120/14007 cut-off events. For 209153/210226 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 139384 event pairs, 755 based on Foata normal form. 328/14237 useless extension candidates. Maximal degree in co-relation 101104. Up to 5101 conditions per place. [2021-12-06 23:03:26,514 INFO L132 encePairwiseOnDemand]: 172/186 looper letters, 368 selfloop transitions, 206 changer transitions 45/752 dead transitions. [2021-12-06 23:03:26,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 752 transitions, 10949 flow [2021-12-06 23:03:26,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 23:03:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-06 23:03:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2801 transitions. [2021-12-06 23:03:26,518 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6845063538611925 [2021-12-06 23:03:26,518 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2801 transitions. [2021-12-06 23:03:26,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2801 transitions. [2021-12-06 23:03:26,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:03:26,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2801 transitions. [2021-12-06 23:03:26,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 127.31818181818181) internal successors, (2801), 22 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:26,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 186.0) internal successors, (4278), 23 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:26,524 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 186.0) internal successors, (4278), 23 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:26,524 INFO L186 Difference]: Start difference. First operand has 283 places, 500 transitions, 5675 flow. Second operand 22 states and 2801 transitions. [2021-12-06 23:03:26,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 752 transitions, 10949 flow [2021-12-06 23:03:26,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 752 transitions, 10698 flow, removed 102 selfloop flow, removed 9 redundant places. [2021-12-06 23:03:26,976 INFO L242 Difference]: Finished difference. Result has 298 places, 530 transitions, 6462 flow [2021-12-06 23:03:26,976 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=5432, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6462, PETRI_PLACES=298, PETRI_TRANSITIONS=530} [2021-12-06 23:03:26,977 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 123 predicate places. [2021-12-06 23:03:26,977 INFO L470 AbstractCegarLoop]: Abstraction has has 298 places, 530 transitions, 6462 flow [2021-12-06 23:03:26,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:26,977 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:03:26,977 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:26,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:03:27,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:27,179 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:03:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:27,181 INFO L85 PathProgramCache]: Analyzing trace with hash -330795999, now seen corresponding path program 12 times [2021-12-06 23:03:27,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:27,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011988570] [2021-12-06 23:03:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:27,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:27,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:27,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011988570] [2021-12-06 23:03:27,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011988570] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:27,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019047419] [2021-12-06 23:03:27,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:03:27,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:27,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:03:27,690 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:03:27,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:03:27,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-12-06 23:03:27,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:03:27,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:03:27,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:03:28,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:03:28,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:03:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:03:28,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:03:28,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019047419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:03:28,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:03:28,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [27] total 34 [2021-12-06 23:03:28,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304110030] [2021-12-06 23:03:28,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:28,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:03:28,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:28,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:03:28,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 23:03:28,033 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2021-12-06 23:03:28,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 530 transitions, 6462 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:28,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:03:28,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2021-12-06 23:03:28,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:03:31,359 INFO L129 PetriNetUnfolder]: 6164/14173 cut-off events. [2021-12-06 23:03:31,359 INFO L130 PetriNetUnfolder]: For 225851/227201 co-relation queries the response was YES. [2021-12-06 23:03:31,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104642 conditions, 14173 events. 6164/14173 cut-off events. For 225851/227201 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 142077 event pairs, 1241 based on Foata normal form. 349/14402 useless extension candidates. Maximal degree in co-relation 104583. Up to 5619 conditions per place. [2021-12-06 23:03:31,537 INFO L132 encePairwiseOnDemand]: 169/186 looper letters, 275 selfloop transitions, 202 changer transitions 5/615 dead transitions. [2021-12-06 23:03:31,537 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 615 transitions, 8734 flow [2021-12-06 23:03:31,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:03:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-06 23:03:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1892 transitions. [2021-12-06 23:03:31,539 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6781362007168459 [2021-12-06 23:03:31,539 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1892 transitions. [2021-12-06 23:03:31,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1892 transitions. [2021-12-06 23:03:31,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:03:31,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1892 transitions. [2021-12-06 23:03:31,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.13333333333334) internal successors, (1892), 15 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:31,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:31,544 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:31,544 INFO L186 Difference]: Start difference. First operand has 298 places, 530 transitions, 6462 flow. Second operand 15 states and 1892 transitions. [2021-12-06 23:03:31,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 615 transitions, 8734 flow [2021-12-06 23:03:32,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 615 transitions, 8537 flow, removed 23 selfloop flow, removed 12 redundant places. [2021-12-06 23:03:32,143 INFO L242 Difference]: Finished difference. Result has 304 places, 549 transitions, 7199 flow [2021-12-06 23:03:32,144 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7199, PETRI_PLACES=304, PETRI_TRANSITIONS=549} [2021-12-06 23:03:32,144 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 129 predicate places. [2021-12-06 23:03:32,144 INFO L470 AbstractCegarLoop]: Abstraction has has 304 places, 549 transitions, 7199 flow [2021-12-06 23:03:32,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:32,144 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:03:32,144 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:32,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:03:32,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 23:03:32,346 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:03:32,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:32,347 INFO L85 PathProgramCache]: Analyzing trace with hash -180309949, now seen corresponding path program 13 times [2021-12-06 23:03:32,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:32,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889770780] [2021-12-06 23:03:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:32,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:32,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:32,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889770780] [2021-12-06 23:03:32,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889770780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:32,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320531065] [2021-12-06 23:03:32,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:03:32,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:32,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:03:32,903 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:03:32,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:03:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:32,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 23:03:32,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:03:33,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:03:33,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 32 [2021-12-06 23:03:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:33,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:03:34,050 INFO L354 Elim1Store]: treesize reduction 14, result has 80.8 percent of original size [2021-12-06 23:03:34,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 84 [2021-12-06 23:03:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:03:34,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320531065] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:34,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:03:34,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [28, 25] total 58 [2021-12-06 23:03:34,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044901734] [2021-12-06 23:03:34,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:34,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 23:03:34,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:34,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 23:03:34,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=3034, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 23:03:34,433 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 186 [2021-12-06 23:03:34,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 549 transitions, 7199 flow. Second operand has 17 states, 17 states have (on average 116.58823529411765) internal successors, (1982), 17 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:34,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:03:34,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 186 [2021-12-06 23:03:34,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:03:38,290 INFO L129 PetriNetUnfolder]: 6387/15271 cut-off events. [2021-12-06 23:03:38,290 INFO L130 PetriNetUnfolder]: For 254231/255461 co-relation queries the response was YES. [2021-12-06 23:03:38,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115004 conditions, 15271 events. 6387/15271 cut-off events. For 254231/255461 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 159122 event pairs, 1477 based on Foata normal form. 329/15486 useless extension candidates. Maximal degree in co-relation 114941. Up to 5646 conditions per place. [2021-12-06 23:03:38,468 INFO L132 encePairwiseOnDemand]: 166/186 looper letters, 343 selfloop transitions, 202 changer transitions 102/777 dead transitions. [2021-12-06 23:03:38,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 777 transitions, 12243 flow [2021-12-06 23:03:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:03:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 23:03:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1979 transitions. [2021-12-06 23:03:38,470 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.664986559139785 [2021-12-06 23:03:38,470 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1979 transitions. [2021-12-06 23:03:38,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1979 transitions. [2021-12-06 23:03:38,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:03:38,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1979 transitions. [2021-12-06 23:03:38,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 123.6875) internal successors, (1979), 16 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:38,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:38,475 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:38,475 INFO L186 Difference]: Start difference. First operand has 304 places, 549 transitions, 7199 flow. Second operand 16 states and 1979 transitions. [2021-12-06 23:03:38,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 777 transitions, 12243 flow [2021-12-06 23:03:39,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 777 transitions, 11949 flow, removed 35 selfloop flow, removed 8 redundant places. [2021-12-06 23:03:39,068 INFO L242 Difference]: Finished difference. Result has 316 places, 587 transitions, 8619 flow [2021-12-06 23:03:39,068 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=6992, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8619, PETRI_PLACES=316, PETRI_TRANSITIONS=587} [2021-12-06 23:03:39,069 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 141 predicate places. [2021-12-06 23:03:39,069 INFO L470 AbstractCegarLoop]: Abstraction has has 316 places, 587 transitions, 8619 flow [2021-12-06 23:03:39,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 116.58823529411765) internal successors, (1982), 17 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:39,069 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:03:39,069 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:39,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 23:03:39,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 23:03:39,270 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:03:39,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:39,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1703061701, now seen corresponding path program 14 times [2021-12-06 23:03:39,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:39,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763969177] [2021-12-06 23:03:39,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:39,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:39,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:39,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763969177] [2021-12-06 23:03:39,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763969177] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:39,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728489055] [2021-12-06 23:03:39,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:03:39,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:39,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:03:39,782 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:03:39,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:03:39,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 23:03:39,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:03:39,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 23:03:39,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:03:40,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:03:40,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:03:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:03:40,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:03:40,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728489055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:03:40,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:03:40,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [27] total 34 [2021-12-06 23:03:40,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032176532] [2021-12-06 23:03:40,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:40,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:03:40,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:40,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:03:40,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 23:03:40,209 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2021-12-06 23:03:40,210 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 587 transitions, 8619 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:40,210 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:03:40,210 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2021-12-06 23:03:40,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:03:45,103 INFO L129 PetriNetUnfolder]: 8153/18857 cut-off events. [2021-12-06 23:03:45,103 INFO L130 PetriNetUnfolder]: For 379466/381841 co-relation queries the response was YES. [2021-12-06 23:03:45,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154653 conditions, 18857 events. 8153/18857 cut-off events. For 379466/381841 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 200296 event pairs, 1652 based on Foata normal form. 593/19291 useless extension candidates. Maximal degree in co-relation 154585. Up to 9372 conditions per place. [2021-12-06 23:03:45,367 INFO L132 encePairwiseOnDemand]: 163/186 looper letters, 493 selfloop transitions, 256 changer transitions 15/897 dead transitions. [2021-12-06 23:03:45,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 897 transitions, 16569 flow [2021-12-06 23:03:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:03:45,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 23:03:45,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2010 transitions. [2021-12-06 23:03:45,369 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6754032258064516 [2021-12-06 23:03:45,369 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2010 transitions. [2021-12-06 23:03:45,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2010 transitions. [2021-12-06 23:03:45,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:03:45,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2010 transitions. [2021-12-06 23:03:45,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 125.625) internal successors, (2010), 16 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:45,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:45,374 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 186.0) internal successors, (3162), 17 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:45,374 INFO L186 Difference]: Start difference. First operand has 316 places, 587 transitions, 8619 flow. Second operand 16 states and 2010 transitions. [2021-12-06 23:03:45,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 897 transitions, 16569 flow [2021-12-06 23:03:47,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 897 transitions, 16351 flow, removed 52 selfloop flow, removed 8 redundant places. [2021-12-06 23:03:47,132 INFO L242 Difference]: Finished difference. Result has 329 places, 778 transitions, 13959 flow [2021-12-06 23:03:47,133 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=8473, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13959, PETRI_PLACES=329, PETRI_TRANSITIONS=778} [2021-12-06 23:03:47,133 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 154 predicate places. [2021-12-06 23:03:47,133 INFO L470 AbstractCegarLoop]: Abstraction has has 329 places, 778 transitions, 13959 flow [2021-12-06 23:03:47,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:47,133 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:03:47,133 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:47,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 23:03:47,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 23:03:47,335 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:03:47,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:47,336 INFO L85 PathProgramCache]: Analyzing trace with hash -237521025, now seen corresponding path program 15 times [2021-12-06 23:03:47,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:47,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768711934] [2021-12-06 23:03:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:47,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:47,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:47,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768711934] [2021-12-06 23:03:47,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768711934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:47,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21689805] [2021-12-06 23:03:47,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:03:47,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:47,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:03:47,925 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:03:47,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:03:47,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-12-06 23:03:47,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:03:47,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:03:47,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:03:48,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:03:48,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:03:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:03:48,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:03:48,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21689805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:03:48,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:03:48,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [28] total 35 [2021-12-06 23:03:48,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924840797] [2021-12-06 23:03:48,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:48,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:03:48,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:48,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:03:48,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 23:03:48,298 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2021-12-06 23:03:48,299 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 778 transitions, 13959 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:48,299 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:03:48,299 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2021-12-06 23:03:48,299 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:03:53,776 INFO L129 PetriNetUnfolder]: 8356/19289 cut-off events. [2021-12-06 23:03:53,776 INFO L130 PetriNetUnfolder]: For 459845/462309 co-relation queries the response was YES. [2021-12-06 23:03:53,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169226 conditions, 19289 events. 8356/19289 cut-off events. For 459845/462309 co-relation queries the response was YES. Maximal size of possible extension queue 1338. Compared 205701 event pairs, 1414 based on Foata normal form. 651/19784 useless extension candidates. Maximal degree in co-relation 169151. Up to 7208 conditions per place. [2021-12-06 23:03:54,048 INFO L132 encePairwiseOnDemand]: 170/186 looper letters, 309 selfloop transitions, 467 changer transitions 23/932 dead transitions. [2021-12-06 23:03:54,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 932 transitions, 18788 flow [2021-12-06 23:03:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 23:03:54,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 23:03:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2140 transitions. [2021-12-06 23:03:54,050 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.676786843769766 [2021-12-06 23:03:54,050 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2140 transitions. [2021-12-06 23:03:54,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2140 transitions. [2021-12-06 23:03:54,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:03:54,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2140 transitions. [2021-12-06 23:03:54,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 125.88235294117646) internal successors, (2140), 17 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:54,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 186.0) internal successors, (3348), 18 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:54,055 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 186.0) internal successors, (3348), 18 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:54,055 INFO L186 Difference]: Start difference. First operand has 329 places, 778 transitions, 13959 flow. Second operand 17 states and 2140 transitions. [2021-12-06 23:03:54,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 932 transitions, 18788 flow [2021-12-06 23:03:56,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 932 transitions, 18442 flow, removed 74 selfloop flow, removed 8 redundant places. [2021-12-06 23:03:56,244 INFO L242 Difference]: Finished difference. Result has 338 places, 820 transitions, 15950 flow [2021-12-06 23:03:56,244 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=13617, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=15950, PETRI_PLACES=338, PETRI_TRANSITIONS=820} [2021-12-06 23:03:56,245 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 163 predicate places. [2021-12-06 23:03:56,245 INFO L470 AbstractCegarLoop]: Abstraction has has 338 places, 820 transitions, 15950 flow [2021-12-06 23:03:56,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:56,245 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:03:56,245 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:56,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 23:03:56,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 23:03:56,447 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:03:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:56,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1601763491, now seen corresponding path program 16 times [2021-12-06 23:03:56,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:56,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764434052] [2021-12-06 23:03:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:56,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:57,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:57,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764434052] [2021-12-06 23:03:57,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764434052] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:57,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372821702] [2021-12-06 23:03:57,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:03:57,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:57,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:03:57,068 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:03:57,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 23:03:57,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:03:57,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:03:57,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 23:03:57,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:03:58,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:03:58,343 INFO L354 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2021-12-06 23:03:58,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 39 [2021-12-06 23:03:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:58,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:03:58,662 INFO L354 Elim1Store]: treesize reduction 14, result has 80.8 percent of original size [2021-12-06 23:03:58,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 90 [2021-12-06 23:03:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:03:59,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372821702] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:59,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:03:59,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [29, 31] total 57 [2021-12-06 23:03:59,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979998935] [2021-12-06 23:03:59,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:59,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 23:03:59,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:59,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 23:03:59,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2928, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 23:03:59,084 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 186 [2021-12-06 23:03:59,085 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 820 transitions, 15950 flow. Second operand has 18 states, 18 states have (on average 116.38888888888889) internal successors, (2095), 18 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:59,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:03:59,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 186 [2021-12-06 23:03:59,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:04:05,424 INFO L129 PetriNetUnfolder]: 8679/20440 cut-off events. [2021-12-06 23:04:05,424 INFO L130 PetriNetUnfolder]: For 522099/525326 co-relation queries the response was YES. [2021-12-06 23:04:05,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181231 conditions, 20440 events. 8679/20440 cut-off events. For 522099/525326 co-relation queries the response was YES. Maximal size of possible extension queue 1433. Compared 223092 event pairs, 1581 based on Foata normal form. 608/20873 useless extension candidates. Maximal degree in co-relation 181155. Up to 11828 conditions per place. [2021-12-06 23:04:05,725 INFO L132 encePairwiseOnDemand]: 165/186 looper letters, 614 selfloop transitions, 163 changer transitions 98/1005 dead transitions. [2021-12-06 23:04:05,725 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1005 transitions, 21378 flow [2021-12-06 23:04:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 23:04:05,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-06 23:04:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2336 transitions. [2021-12-06 23:04:05,727 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6610073571024335 [2021-12-06 23:04:05,727 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2336 transitions. [2021-12-06 23:04:05,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2336 transitions. [2021-12-06 23:04:05,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:04:05,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2336 transitions. [2021-12-06 23:04:05,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 122.94736842105263) internal successors, (2336), 19 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:05,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:05,732 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 186.0) internal successors, (3720), 20 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:05,733 INFO L186 Difference]: Start difference. First operand has 338 places, 820 transitions, 15950 flow. Second operand 19 states and 2336 transitions. [2021-12-06 23:04:05,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1005 transitions, 21378 flow [2021-12-06 23:04:08,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 1005 transitions, 21002 flow, removed 84 selfloop flow, removed 10 redundant places. [2021-12-06 23:04:08,274 INFO L242 Difference]: Finished difference. Result has 353 places, 840 transitions, 16576 flow [2021-12-06 23:04:08,274 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=15672, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=16576, PETRI_PLACES=353, PETRI_TRANSITIONS=840} [2021-12-06 23:04:08,275 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 178 predicate places. [2021-12-06 23:04:08,275 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 840 transitions, 16576 flow [2021-12-06 23:04:08,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 116.38888888888889) internal successors, (2095), 18 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:08,275 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:04:08,275 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:04:08,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 23:04:08,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:04:08,477 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:04:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:04:08,478 INFO L85 PathProgramCache]: Analyzing trace with hash -2146931093, now seen corresponding path program 17 times [2021-12-06 23:04:08,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:04:08,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766922592] [2021-12-06 23:04:08,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:04:08,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:04:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:04:09,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:04:09,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766922592] [2021-12-06 23:04:09,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766922592] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:04:09,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451282272] [2021-12-06 23:04:09,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:04:09,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:04:09,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:04:09,768 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:04:09,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 23:04:09,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 23:04:09,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:04:09,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 23:04:09,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:04:10,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:04:10,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:04:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:04:10,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:04:10,332 INFO L354 Elim1Store]: treesize reduction 14, result has 80.8 percent of original size [2021-12-06 23:04:10,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 78 [2021-12-06 23:04:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:04:10,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451282272] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:04:10,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:04:10,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [32, 15] total 46 [2021-12-06 23:04:10,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711884591] [2021-12-06 23:04:10,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:04:10,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:04:10,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:04:10,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:04:10,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1928, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 23:04:10,523 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 186 [2021-12-06 23:04:10,524 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 840 transitions, 16576 flow. Second operand has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:10,524 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:04:10,524 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 186 [2021-12-06 23:04:10,524 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:04:16,422 INFO L129 PetriNetUnfolder]: 8349/19442 cut-off events. [2021-12-06 23:04:16,422 INFO L130 PetriNetUnfolder]: For 509831/512529 co-relation queries the response was YES. [2021-12-06 23:04:16,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 175921 conditions, 19442 events. 8349/19442 cut-off events. For 509831/512529 co-relation queries the response was YES. Maximal size of possible extension queue 1354. Compared 209082 event pairs, 1454 based on Foata normal form. 739/20024 useless extension candidates. Maximal degree in co-relation 175837. Up to 7247 conditions per place. [2021-12-06 23:04:16,711 INFO L132 encePairwiseOnDemand]: 172/186 looper letters, 263 selfloop transitions, 456 changer transitions 53/905 dead transitions. [2021-12-06 23:04:16,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 905 transitions, 19226 flow [2021-12-06 23:04:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 23:04:16,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-06 23:04:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1660 transitions. [2021-12-06 23:04:16,713 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6865177832919769 [2021-12-06 23:04:16,713 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1660 transitions. [2021-12-06 23:04:16,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1660 transitions. [2021-12-06 23:04:16,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:04:16,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1660 transitions. [2021-12-06 23:04:16,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 127.6923076923077) internal successors, (1660), 13 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:16,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 186.0) internal successors, (2604), 14 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:16,716 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 186.0) internal successors, (2604), 14 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:16,716 INFO L186 Difference]: Start difference. First operand has 353 places, 840 transitions, 16576 flow. Second operand 13 states and 1660 transitions. [2021-12-06 23:04:16,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 905 transitions, 19226 flow [2021-12-06 23:04:19,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 905 transitions, 18870 flow, removed 46 selfloop flow, removed 14 redundant places. [2021-12-06 23:04:19,149 INFO L242 Difference]: Finished difference. Result has 350 places, 805 transitions, 16823 flow [2021-12-06 23:04:19,150 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=16226, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=456, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16823, PETRI_PLACES=350, PETRI_TRANSITIONS=805} [2021-12-06 23:04:19,150 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 175 predicate places. [2021-12-06 23:04:19,150 INFO L470 AbstractCegarLoop]: Abstraction has has 350 places, 805 transitions, 16823 flow [2021-12-06 23:04:19,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.83333333333333) internal successors, (1450), 12 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:19,150 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:04:19,151 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:04:19,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 23:04:19,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:04:19,352 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:04:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:04:19,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1240750711, now seen corresponding path program 18 times [2021-12-06 23:04:19,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:04:19,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820492340] [2021-12-06 23:04:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:04:19,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:04:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:04:19,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:04:19,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820492340] [2021-12-06 23:04:19,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820492340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:04:19,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932248212] [2021-12-06 23:04:19,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:04:19,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:04:19,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:04:19,969 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:04:19,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 23:04:20,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-12-06 23:04:20,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:04:20,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 23:04:20,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:04:20,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:04:20,107 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:04:20,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 23:04:20,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 23:04:20,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:04:20,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:04:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:04:20,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:04:20,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932248212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:04:20,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:04:20,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [30] total 44 [2021-12-06 23:04:20,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464558442] [2021-12-06 23:04:20,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:04:20,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:04:20,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:04:20,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:04:20,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1754, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 23:04:20,575 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 186 [2021-12-06 23:04:20,576 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 805 transitions, 16823 flow. Second operand has 20 states, 20 states have (on average 100.65) internal successors, (2013), 20 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:20,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:04:20,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 186 [2021-12-06 23:04:20,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:04:27,831 INFO L129 PetriNetUnfolder]: 9278/22360 cut-off events. [2021-12-06 23:04:27,831 INFO L130 PetriNetUnfolder]: For 613550/616353 co-relation queries the response was YES. [2021-12-06 23:04:28,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202371 conditions, 22360 events. 9278/22360 cut-off events. For 613550/616353 co-relation queries the response was YES. Maximal size of possible extension queue 1559. Compared 252602 event pairs, 920 based on Foata normal form. 734/22914 useless extension candidates. Maximal degree in co-relation 202289. Up to 8396 conditions per place. [2021-12-06 23:04:28,264 INFO L132 encePairwiseOnDemand]: 152/186 looper letters, 374 selfloop transitions, 563 changer transitions 75/1130 dead transitions. [2021-12-06 23:04:28,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1130 transitions, 25576 flow [2021-12-06 23:04:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 23:04:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-06 23:04:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3033 transitions. [2021-12-06 23:04:28,268 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5622914349276974 [2021-12-06 23:04:28,268 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3033 transitions. [2021-12-06 23:04:28,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3033 transitions. [2021-12-06 23:04:28,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:04:28,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3033 transitions. [2021-12-06 23:04:28,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 104.58620689655173) internal successors, (3033), 29 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:28,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 186.0) internal successors, (5580), 30 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:28,276 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 186.0) internal successors, (5580), 30 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:28,276 INFO L186 Difference]: Start difference. First operand has 350 places, 805 transitions, 16823 flow. Second operand 29 states and 3033 transitions. [2021-12-06 23:04:28,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1130 transitions, 25576 flow [2021-12-06 23:04:30,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1130 transitions, 23033 flow, removed 14 selfloop flow, removed 17 redundant places. [2021-12-06 23:04:30,927 INFO L242 Difference]: Finished difference. Result has 363 places, 970 transitions, 20271 flow [2021-12-06 23:04:30,928 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=14774, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=20271, PETRI_PLACES=363, PETRI_TRANSITIONS=970} [2021-12-06 23:04:30,928 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 188 predicate places. [2021-12-06 23:04:30,929 INFO L470 AbstractCegarLoop]: Abstraction has has 363 places, 970 transitions, 20271 flow [2021-12-06 23:04:30,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 100.65) internal successors, (2013), 20 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:30,929 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:04:30,929 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:04:30,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 23:04:31,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:04:31,131 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:04:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:04:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash 844870161, now seen corresponding path program 19 times [2021-12-06 23:04:31,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:04:31,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423702898] [2021-12-06 23:04:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:04:31,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:04:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:04:31,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:04:31,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423702898] [2021-12-06 23:04:31,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423702898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:04:31,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697007363] [2021-12-06 23:04:31,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:04:31,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:04:31,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:04:31,659 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:04:31,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 23:04:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:31,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 23:04:31,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:04:31,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:04:31,883 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:04:31,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 23:04:32,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 23:04:33,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:04:33,560 INFO L354 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2021-12-06 23:04:33,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 39 [2021-12-06 23:04:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:04:33,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:04:34,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:04:34,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 170 [2021-12-06 23:04:34,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:04:34,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 70 [2021-12-06 23:04:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:04:39,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697007363] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:04:39,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:04:39,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33, 33] total 77 [2021-12-06 23:04:39,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130926647] [2021-12-06 23:04:39,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:04:39,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-06 23:04:39,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:04:39,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-06 23:04:39,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=5392, Unknown=5, NotChecked=0, Total=5852 [2021-12-06 23:04:39,297 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 186 [2021-12-06 23:04:39,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 970 transitions, 20271 flow. Second operand has 77 states, 77 states have (on average 89.66233766233766) internal successors, (6904), 77 states have internal predecessors, (6904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:39,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:04:39,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 186 [2021-12-06 23:04:39,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:04:57,709 INFO L129 PetriNetUnfolder]: 18028/40776 cut-off events. [2021-12-06 23:04:57,709 INFO L130 PetriNetUnfolder]: For 1456583/1463501 co-relation queries the response was YES. [2021-12-06 23:04:58,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 414722 conditions, 40776 events. 18028/40776 cut-off events. For 1456583/1463501 co-relation queries the response was YES. Maximal size of possible extension queue 2671. Compared 481175 event pairs, 1766 based on Foata normal form. 1294/41677 useless extension candidates. Maximal degree in co-relation 414633. Up to 16850 conditions per place. [2021-12-06 23:04:58,549 INFO L132 encePairwiseOnDemand]: 140/186 looper letters, 1179 selfloop transitions, 1056 changer transitions 52/2390 dead transitions. [2021-12-06 23:04:58,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 2390 transitions, 59302 flow [2021-12-06 23:04:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-06 23:04:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-12-06 23:04:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 7819 transitions. [2021-12-06 23:04:58,557 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5004480286738351 [2021-12-06 23:04:58,557 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 7819 transitions. [2021-12-06 23:04:58,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 7819 transitions. [2021-12-06 23:04:58,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:04:58,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 7819 transitions. [2021-12-06 23:04:58,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 93.08333333333333) internal successors, (7819), 84 states have internal predecessors, (7819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:58,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 186.0) internal successors, (15810), 85 states have internal predecessors, (15810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:58,575 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 186.0) internal successors, (15810), 85 states have internal predecessors, (15810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:58,575 INFO L186 Difference]: Start difference. First operand has 363 places, 970 transitions, 20271 flow. Second operand 84 states and 7819 transitions. [2021-12-06 23:04:58,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 2390 transitions, 59302 flow [2021-12-06 23:05:11,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 2390 transitions, 58474 flow, removed 369 selfloop flow, removed 17 redundant places. [2021-12-06 23:05:11,968 INFO L242 Difference]: Finished difference. Result has 471 places, 1966 transitions, 50372 flow [2021-12-06 23:05:11,968 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=19850, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=50372, PETRI_PLACES=471, PETRI_TRANSITIONS=1966} [2021-12-06 23:05:11,969 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 296 predicate places. [2021-12-06 23:05:11,969 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 1966 transitions, 50372 flow [2021-12-06 23:05:11,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 89.66233766233766) internal successors, (6904), 77 states have internal predecessors, (6904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:05:11,970 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:05:11,970 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:05:11,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 23:05:12,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:05:12,171 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:05:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:05:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1554795031, now seen corresponding path program 20 times [2021-12-06 23:05:12,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:05:12,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377317119] [2021-12-06 23:05:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:05:12,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:05:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:05:12,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:05:12,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377317119] [2021-12-06 23:05:12,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377317119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:05:12,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580044182] [2021-12-06 23:05:12,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:05:12,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:05:12,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:05:12,775 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:05:12,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 23:05:12,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 23:05:12,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:05:12,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 23:05:12,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:05:12,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:05:12,919 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:05:12,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 23:05:13,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 23:05:13,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:05:13,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:05:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:05:13,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:05:13,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580044182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:05:13,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:05:13,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [29] total 43 [2021-12-06 23:05:13,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416445741] [2021-12-06 23:05:13,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:05:13,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:05:13,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:05:13,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:05:13,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1675, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 23:05:13,353 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 186 [2021-12-06 23:05:13,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1966 transitions, 50372 flow. Second operand has 20 states, 20 states have (on average 100.65) internal successors, (2013), 20 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:05:13,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:05:13,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 186 [2021-12-06 23:05:13,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:05:38,312 INFO L129 PetriNetUnfolder]: 18268/41498 cut-off events. [2021-12-06 23:05:38,312 INFO L130 PetriNetUnfolder]: For 2175399/2185374 co-relation queries the response was YES. [2021-12-06 23:05:39,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 483784 conditions, 41498 events. 18268/41498 cut-off events. For 2175399/2185374 co-relation queries the response was YES. Maximal size of possible extension queue 2717. Compared 491630 event pairs, 3065 based on Foata normal form. 2107/43205 useless extension candidates. Maximal degree in co-relation 483654. Up to 15461 conditions per place. [2021-12-06 23:05:39,423 INFO L132 encePairwiseOnDemand]: 155/186 looper letters, 696 selfloop transitions, 1321 changer transitions 10/2149 dead transitions. [2021-12-06 23:05:39,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 2149 transitions, 58802 flow [2021-12-06 23:05:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 23:05:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-12-06 23:05:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2615 transitions. [2021-12-06 23:05:39,426 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5623655913978495 [2021-12-06 23:05:39,426 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2615 transitions. [2021-12-06 23:05:39,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2615 transitions. [2021-12-06 23:05:39,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:05:39,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2615 transitions. [2021-12-06 23:05:39,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 104.6) internal successors, (2615), 25 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:05:39,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 186.0) internal successors, (4836), 26 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:05:39,431 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 186.0) internal successors, (4836), 26 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:05:39,431 INFO L186 Difference]: Start difference. First operand has 471 places, 1966 transitions, 50372 flow. Second operand 25 states and 2615 transitions. [2021-12-06 23:05:39,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 2149 transitions, 58802 flow [2021-12-06 23:06:05,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 2149 transitions, 57424 flow, removed 672 selfloop flow, removed 18 redundant places. [2021-12-06 23:06:05,271 INFO L242 Difference]: Finished difference. Result has 480 places, 2052 transitions, 55217 flow [2021-12-06 23:06:05,272 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=49126, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=55217, PETRI_PLACES=480, PETRI_TRANSITIONS=2052} [2021-12-06 23:06:05,272 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 305 predicate places. [2021-12-06 23:06:05,273 INFO L470 AbstractCegarLoop]: Abstraction has has 480 places, 2052 transitions, 55217 flow [2021-12-06 23:06:05,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 100.65) internal successors, (2013), 20 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:05,273 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:06:05,273 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:05,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 23:06:05,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 23:06:05,474 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:06:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:05,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1833349353, now seen corresponding path program 21 times [2021-12-06 23:06:05,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:05,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345213284] [2021-12-06 23:06:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:05,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:06,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:06,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345213284] [2021-12-06 23:06:06,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345213284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:06,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120739333] [2021-12-06 23:06:06,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:06:06,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:06,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:06,099 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:06,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 23:06:06,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-12-06 23:06:06,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:06:06,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 23:06:06,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:06,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:06:06,224 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:06:06,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 23:06:06,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 23:06:06,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:06:06,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:06:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:06:06,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:06:06,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120739333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:06:06,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:06:06,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [30] total 44 [2021-12-06 23:06:06,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994742333] [2021-12-06 23:06:06,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:06,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:06:06,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:06:06,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1748, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 23:06:06,686 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 186 [2021-12-06 23:06:06,687 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 2052 transitions, 55217 flow. Second operand has 20 states, 20 states have (on average 100.65) internal successors, (2013), 20 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:06,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:06:06,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 186 [2021-12-06 23:06:06,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:06:35,682 INFO L129 PetriNetUnfolder]: 19568/44871 cut-off events. [2021-12-06 23:06:35,682 INFO L130 PetriNetUnfolder]: For 2696046/2706601 co-relation queries the response was YES. [2021-12-06 23:06:36,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 545218 conditions, 44871 events. 19568/44871 cut-off events. For 2696046/2706601 co-relation queries the response was YES. Maximal size of possible extension queue 2928. Compared 540432 event pairs, 2699 based on Foata normal form. 2228/46519 useless extension candidates. Maximal degree in co-relation 545084. Up to 16644 conditions per place. [2021-12-06 23:06:36,939 INFO L132 encePairwiseOnDemand]: 156/186 looper letters, 885 selfloop transitions, 1370 changer transitions 49/2426 dead transitions. [2021-12-06 23:06:36,939 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 2426 transitions, 69125 flow [2021-12-06 23:06:36,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 23:06:36,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-06 23:06:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3130 transitions. [2021-12-06 23:06:36,943 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5609318996415771 [2021-12-06 23:06:36,943 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3130 transitions. [2021-12-06 23:06:36,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3130 transitions. [2021-12-06 23:06:36,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:06:36,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3130 transitions. [2021-12-06 23:06:36,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 104.33333333333333) internal successors, (3130), 30 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:36,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 186.0) internal successors, (5766), 31 states have internal predecessors, (5766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:36,948 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 186.0) internal successors, (5766), 31 states have internal predecessors, (5766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:36,948 INFO L186 Difference]: Start difference. First operand has 480 places, 2052 transitions, 55217 flow. Second operand 30 states and 3130 transitions. [2021-12-06 23:06:36,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 2426 transitions, 69125 flow [2021-12-06 23:07:06,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 2426 transitions, 68345 flow, removed 353 selfloop flow, removed 15 redundant places. [2021-12-06 23:07:06,213 INFO L242 Difference]: Finished difference. Result has 505 places, 2245 transitions, 64384 flow [2021-12-06 23:07:06,215 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=54465, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2052, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=64384, PETRI_PLACES=505, PETRI_TRANSITIONS=2245} [2021-12-06 23:07:06,215 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 330 predicate places. [2021-12-06 23:07:06,215 INFO L470 AbstractCegarLoop]: Abstraction has has 505 places, 2245 transitions, 64384 flow [2021-12-06 23:07:06,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 100.65) internal successors, (2013), 20 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:07:06,216 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:07:06,216 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:06,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-06 23:07:06,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 23:07:06,417 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:07:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:06,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1289436553, now seen corresponding path program 22 times [2021-12-06 23:07:06,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:06,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861012505] [2021-12-06 23:07:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:06,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:07,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:07,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861012505] [2021-12-06 23:07:07,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861012505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:07,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714608795] [2021-12-06 23:07:07,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:07:07,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:07,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:07,038 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:07,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 23:07:07,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:07:07,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:07:07,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 23:07:07,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:08,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:07:08,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 23:07:08,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:07:08,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 32 [2021-12-06 23:07:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:08,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:07:08,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:07:08,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 170 [2021-12-06 23:07:08,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:07:08,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 70 [2021-12-06 23:07:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:10,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714608795] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:07:10,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:07:10,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33, 34] total 86 [2021-12-06 23:07:10,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709314183] [2021-12-06 23:07:10,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:07:10,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-06 23:07:10,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:10,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-06 23:07:10,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=6865, Unknown=13, NotChecked=0, Total=7310 [2021-12-06 23:07:10,587 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 186 [2021-12-06 23:07:10,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 2245 transitions, 64384 flow. Second operand has 86 states, 86 states have (on average 93.53488372093024) internal successors, (8044), 86 states have internal predecessors, (8044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:07:10,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:07:10,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 186 [2021-12-06 23:07:10,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:08:20,866 INFO L129 PetriNetUnfolder]: 33079/81761 cut-off events. [2021-12-06 23:08:20,867 INFO L130 PetriNetUnfolder]: For 5750425/5772720 co-relation queries the response was YES. [2021-12-06 23:08:23,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1027498 conditions, 81761 events. 33079/81761 cut-off events. For 5750425/5772720 co-relation queries the response was YES. Maximal size of possible extension queue 4813. Compared 1106647 event pairs, 4708 based on Foata normal form. 4388/85350 useless extension candidates. Maximal degree in co-relation 1027353. Up to 29857 conditions per place. [2021-12-06 23:08:23,675 INFO L132 encePairwiseOnDemand]: 138/186 looper letters, 2535 selfloop transitions, 1737 changer transitions 352/4729 dead transitions. [2021-12-06 23:08:23,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 4729 transitions, 141527 flow [2021-12-06 23:08:23,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 23:08:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-12-06 23:08:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 7958 transitions. [2021-12-06 23:08:23,682 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5282092127970264 [2021-12-06 23:08:23,682 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 7958 transitions. [2021-12-06 23:08:23,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 7958 transitions. [2021-12-06 23:08:23,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:08:23,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 7958 transitions. [2021-12-06 23:08:23,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 98.24691358024691) internal successors, (7958), 81 states have internal predecessors, (7958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:08:23,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 186.0) internal successors, (15252), 82 states have internal predecessors, (15252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:08:23,705 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 186.0) internal successors, (15252), 82 states have internal predecessors, (15252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:08:23,705 INFO L186 Difference]: Start difference. First operand has 505 places, 2245 transitions, 64384 flow. Second operand 81 states and 7958 transitions. [2021-12-06 23:08:23,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 4729 transitions, 141527 flow [2021-12-06 23:10:33,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 4729 transitions, 137620 flow, removed 1510 selfloop flow, removed 18 redundant places. [2021-12-06 23:10:33,577 INFO L242 Difference]: Finished difference. Result has 596 places, 3197 transitions, 97460 flow [2021-12-06 23:10:33,579 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=63000, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=861, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1032, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=97460, PETRI_PLACES=596, PETRI_TRANSITIONS=3197} [2021-12-06 23:10:33,579 INFO L334 CegarLoopForPetriNet]: 175 programPoint places, 421 predicate places. [2021-12-06 23:10:33,579 INFO L470 AbstractCegarLoop]: Abstraction has has 596 places, 3197 transitions, 97460 flow [2021-12-06 23:10:33,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 93.53488372093024) internal successors, (8044), 86 states have internal predecessors, (8044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:10:33,580 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:10:33,581 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:33,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 23:10:33,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 23:10:33,782 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 23:10:33,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:33,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1901172701, now seen corresponding path program 23 times [2021-12-06 23:10:33,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:33,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541070426] [2021-12-06 23:10:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:33,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:10:34,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:34,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541070426] [2021-12-06 23:10:34,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541070426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:10:34,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462074067] [2021-12-06 23:10:34,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:10:34,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:10:34,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:10:34,379 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:10:34,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b217d1f-e572-47c1-ae1a-41702ca6313d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 23:10:34,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 23:10:34,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:10:34,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 23:10:34,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:10:34,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:10:34,522 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:10:34,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 23:10:34,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 23:10:35,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:10:35,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-12-06 23:10:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:10:35,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:10:35,187 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_815 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_815) c_~f~0.base))) (= (select .cse0 (+ (* c_~i~0 4) c_~f~0.offset)) (select .cse0 (+ (* (select .cse0 (+ (* c_~j~0 4) c_~f~0.offset)) 4) c_~f~0.offset))))) is different from false [2021-12-06 23:10:35,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:10:35,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 122 [2021-12-06 23:10:35,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:10:35,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 57 [2021-12-06 23:10:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:10:35,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462074067] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:10:35,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:10:35,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [30, 22] total 55 [2021-12-06 23:10:35,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731638639] [2021-12-06 23:10:35,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:35,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:10:35,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:35,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:10:35,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2675, Unknown=1, NotChecked=104, Total=2970 [2021-12-06 23:10:35,746 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 186 [2021-12-06 23:10:35,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 3197 transitions, 97460 flow. Second operand has 20 states, 20 states have (on average 100.65) internal successors, (2013), 20 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:10:35,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:10:35,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 186 [2021-12-06 23:10:35,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:11:56,537 INFO L129 PetriNetUnfolder]: 32160/80780 cut-off events. [2021-12-06 23:11:56,537 INFO L130 PetriNetUnfolder]: For 6806480/6833577 co-relation queries the response was YES. [2021-12-06 23:11:59,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1079886 conditions, 80780 events. 32160/80780 cut-off events. For 6806480/6833577 co-relation queries the response was YES. Maximal size of possible extension queue 4721. Compared 1104835 event pairs, 4558 based on Foata normal form. 4418/84128 useless extension candidates. Maximal degree in co-relation 1079711. Up to 28868 conditions per place. [2021-12-06 23:11:59,862 INFO L132 encePairwiseOnDemand]: 165/186 looper letters, 1031 selfloop transitions, 2033 changer transitions 209/3395 dead transitions. [2021-12-06 23:11:59,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 3395 transitions, 109530 flow [2021-12-06 23:11:59,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 23:11:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-12-06 23:11:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2645 transitions. [2021-12-06 23:11:59,864 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5688172043010753 [2021-12-06 23:11:59,864 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2645 transitions. [2021-12-06 23:11:59,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2645 transitions. [2021-12-06 23:11:59,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:11:59,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2645 transitions. [2021-12-06 23:11:59,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 105.8) internal successors, (2645), 25 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:11:59,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 186.0) internal successors, (4836), 26 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:11:59,870 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 186.0) internal successors, (4836), 26 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:11:59,870 INFO L186 Difference]: Start difference. First operand has 596 places, 3197 transitions, 97460 flow. Second operand 25 states and 2645 transitions. [2021-12-06 23:11:59,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 3395 transitions, 109530 flow