./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y --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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:24:30,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:24:30,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:24:30,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:24:30,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:24:30,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:24:30,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:24:30,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:24:30,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:24:30,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:24:30,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:24:30,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:24:30,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:24:30,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:24:30,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:24:30,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:24:30,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:24:30,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:24:30,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:24:30,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:24:30,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:24:30,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:24:30,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:24:30,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:24:30,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:24:30,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:24:30,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:24:30,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:24:30,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:24:30,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:24:30,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:24:30,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:24:30,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:24:30,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:24:30,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:24:30,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:24:30,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:24:30,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:24:30,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:24:30,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:24:30,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:24:30,421 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:24:30,454 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:24:30,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:24:30,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:24:30,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:24:30,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:24:30,463 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:24:30,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:24:30,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:24:30,466 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:24:30,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:24:30,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:24:30,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:24:30,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:24:30,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:24:30,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:24:30,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:24:30,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:24:30,470 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:24:30,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:24:30,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:24:30,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:24:30,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:24:30,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:24:30,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:24:30,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:24:30,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:24:30,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:24:30,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:24:30,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:24:30,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:24:30,476 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:24:30,476 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:24:30,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:24:30,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:24:30,478 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_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2021-11-13 18:24:30,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:24:30,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:24:30,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:24:30,870 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:24:30,870 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:24:30,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2021-11-13 18:24:30,975 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/data/8605cccf4/43b73bfa636b4027a07c143fba687e37/FLAG7f3f195c6 [2021-11-13 18:24:31,500 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:24:31,501 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2021-11-13 18:24:31,509 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/data/8605cccf4/43b73bfa636b4027a07c143fba687e37/FLAG7f3f195c6 [2021-11-13 18:24:31,876 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/data/8605cccf4/43b73bfa636b4027a07c143fba687e37 [2021-11-13 18:24:31,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:24:31,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:24:31,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:24:31,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:24:31,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:24:31,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:24:31" (1/1) ... [2021-11-13 18:24:31,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@344fd043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:31, skipping insertion in model container [2021-11-13 18:24:31,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:24:31" (1/1) ... [2021-11-13 18:24:31,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:24:31,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:24:32,180 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2021-11-13 18:24:32,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:24:32,195 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:24:32,218 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2021-11-13 18:24:32,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:24:32,236 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:24:32,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32 WrapperNode [2021-11-13 18:24:32,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:24:32,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:24:32,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:24:32,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:24:32,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:24:32,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:24:32,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:24:32,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:24:32,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:24:32,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:24:32,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:24:32,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:24:32,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:24:32,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:32,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:32,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:24:32,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-13 18:24:32,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-13 18:24:32,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-13 18:24:32,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-13 18:24:32,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:24:32,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:24:32,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:24:32,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-13 18:24:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-13 18:24:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:24:32,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:24:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:24:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:24:32,407 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-13 18:24:32,776 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:24:32,777 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 18:24:32,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:24:32 BoogieIcfgContainer [2021-11-13 18:24:32,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:24:32,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:24:32,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:24:32,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:24:32,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:24:31" (1/3) ... [2021-11-13 18:24:32,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494732fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:24:32, skipping insertion in model container [2021-11-13 18:24:32,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (2/3) ... [2021-11-13 18:24:32,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494732fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:24:32, skipping insertion in model container [2021-11-13 18:24:32,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:24:32" (3/3) ... [2021-11-13 18:24:32,790 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2021-11-13 18:24:32,796 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-13 18:24:32,797 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:24:32,797 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:24:32,797 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-13 18:24:32,837 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,838 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,838 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,839 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,839 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,840 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,840 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,840 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,841 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,841 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,841 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,842 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,842 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,842 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,843 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,843 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,843 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,843 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,844 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,844 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,844 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,845 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,845 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,846 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,846 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,846 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,847 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,847 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,848 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,848 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,848 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,848 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,849 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,849 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,849 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,850 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,850 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,850 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,851 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,851 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,852 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,852 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,852 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,852 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,853 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,853 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,853 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,854 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,857 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,858 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,858 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,858 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,859 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,859 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,859 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,861 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,861 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,862 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,862 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,862 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:24:32,867 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-13 18:24:32,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:24:32,939 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 [2021-11-13 18:24:32,939 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-13 18:24:32,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2021-11-13 18:24:33,063 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2021-11-13 18:24:33,063 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-13 18:24:33,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-11-13 18:24:33,069 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2021-11-13 18:24:33,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2021-11-13 18:24:33,122 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2021-11-13 18:24:33,124 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-13 18:24:33,124 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:33,125 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] [2021-11-13 18:24:33,126 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:24:33,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:33,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1515800342, now seen corresponding path program 1 times [2021-11-13 18:24:33,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:33,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395507147] [2021-11-13 18:24:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:33,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:33,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:33,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395507147] [2021-11-13 18:24:33,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395507147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:33,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:33,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:24:33,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382144184] [2021-11-13 18:24:33,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:33,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:24:33,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:33,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:24:33,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:24:33,494 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2021-11-13 18:24:33,500 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:33,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:33,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2021-11-13 18:24:33,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:24:33,556 INFO L129 PetriNetUnfolder]: 11/107 cut-off events. [2021-11-13 18:24:33,557 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2021-11-13 18:24:33,559 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 107 events. 11/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 3 based on Foata normal form. 11/109 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2021-11-13 18:24:33,561 INFO L132 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2021-11-13 18:24:33,562 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2021-11-13 18:24:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:24:33,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-13 18:24:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2021-11-13 18:24:33,579 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2021-11-13 18:24:33,583 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2021-11-13 18:24:33,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2021-11-13 18:24:33,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:24:33,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2021-11-13 18:24:33,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:33,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:33,620 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:33,623 INFO L186 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2021-11-13 18:24:33,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2021-11-13 18:24:33,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-13 18:24:33,634 INFO L242 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2021-11-13 18:24:33,637 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2021-11-13 18:24:33,642 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2021-11-13 18:24:33,643 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2021-11-13 18:24:33,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:33,643 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:33,644 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] [2021-11-13 18:24:33,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:24:33,645 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:24:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:33,646 INFO L85 PathProgramCache]: Analyzing trace with hash -79113043, now seen corresponding path program 1 times [2021-11-13 18:24:33,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:33,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823236864] [2021-11-13 18:24:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:33,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:34,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:34,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823236864] [2021-11-13 18:24:34,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823236864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:34,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:34,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 18:24:34,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950983393] [2021-11-13 18:24:34,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:34,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:24:34,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:34,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:24:34,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:24:34,716 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-11-13 18:24:34,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:34,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:34,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-11-13 18:24:34,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:24:35,362 INFO L129 PetriNetUnfolder]: 67/248 cut-off events. [2021-11-13 18:24:35,362 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-11-13 18:24:35,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 248 events. 67/248 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 955 event pairs, 34 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 417. Up to 102 conditions per place. [2021-11-13 18:24:35,370 INFO L132 encePairwiseOnDemand]: 76/89 looper letters, 43 selfloop transitions, 11 changer transitions 6/103 dead transitions. [2021-11-13 18:24:35,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 337 flow [2021-11-13 18:24:35,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:24:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-13 18:24:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 698 transitions. [2021-11-13 18:24:35,382 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653558052434457 [2021-11-13 18:24:35,382 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 698 transitions. [2021-11-13 18:24:35,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 698 transitions. [2021-11-13 18:24:35,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:24:35,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 698 transitions. [2021-11-13 18:24:35,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.166666666666664) internal successors, (698), 12 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:35,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:35,397 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:35,397 INFO L186 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 698 transitions. [2021-11-13 18:24:35,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 337 flow [2021-11-13 18:24:35,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-13 18:24:35,406 INFO L242 Difference]: Finished difference. Result has 92 places, 79 transitions, 213 flow [2021-11-13 18:24:35,407 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2021-11-13 18:24:35,408 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2021-11-13 18:24:35,408 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 213 flow [2021-11-13 18:24:35,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:35,410 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:35,410 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] [2021-11-13 18:24:35,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:24:35,411 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:24:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:35,413 INFO L85 PathProgramCache]: Analyzing trace with hash -42932599, now seen corresponding path program 2 times [2021-11-13 18:24:35,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:35,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556862097] [2021-11-13 18:24:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:35,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:36,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:36,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556862097] [2021-11-13 18:24:36,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556862097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:36,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:36,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 18:24:36,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3515662] [2021-11-13 18:24:36,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:36,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:24:36,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:36,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:24:36,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:24:36,131 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-11-13 18:24:36,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:36,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:36,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-11-13 18:24:36,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:24:36,603 INFO L129 PetriNetUnfolder]: 68/264 cut-off events. [2021-11-13 18:24:36,603 INFO L130 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2021-11-13 18:24:36,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 264 events. 68/264 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1119 event pairs, 36 based on Foata normal form. 1/262 useless extension candidates. Maximal degree in co-relation 531. Up to 102 conditions per place. [2021-11-13 18:24:36,608 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 40 selfloop transitions, 11 changer transitions 11/105 dead transitions. [2021-11-13 18:24:36,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 429 flow [2021-11-13 18:24:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:24:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-13 18:24:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2021-11-13 18:24:36,614 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.650749063670412 [2021-11-13 18:24:36,614 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2021-11-13 18:24:36,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2021-11-13 18:24:36,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:24:36,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2021-11-13 18:24:36,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:36,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:36,625 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:36,625 INFO L186 Difference]: Start difference. First operand has 92 places, 79 transitions, 213 flow. Second operand 12 states and 695 transitions. [2021-11-13 18:24:36,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 429 flow [2021-11-13 18:24:36,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 407 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-11-13 18:24:36,634 INFO L242 Difference]: Finished difference. Result has 100 places, 80 transitions, 247 flow [2021-11-13 18:24:36,634 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=247, PETRI_PLACES=100, PETRI_TRANSITIONS=80} [2021-11-13 18:24:36,636 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2021-11-13 18:24:36,636 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 80 transitions, 247 flow [2021-11-13 18:24:36,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:36,637 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:36,637 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] [2021-11-13 18:24:36,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:24:36,638 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:24:36,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:36,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1623942775, now seen corresponding path program 3 times [2021-11-13 18:24:36,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:36,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94595817] [2021-11-13 18:24:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:36,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:37,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:37,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94595817] [2021-11-13 18:24:37,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94595817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:37,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:37,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 18:24:37,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298928768] [2021-11-13 18:24:37,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:37,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:24:37,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:37,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:24:37,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:24:37,189 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-11-13 18:24:37,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 80 transitions, 247 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:37,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:37,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-11-13 18:24:37,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:24:37,773 INFO L129 PetriNetUnfolder]: 72/299 cut-off events. [2021-11-13 18:24:37,774 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2021-11-13 18:24:37,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 299 events. 72/299 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1369 event pairs, 41 based on Foata normal form. 1/295 useless extension candidates. Maximal degree in co-relation 655. Up to 105 conditions per place. [2021-11-13 18:24:37,780 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2021-11-13 18:24:37,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 519 flow [2021-11-13 18:24:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:24:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-13 18:24:37,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 704 transitions. [2021-11-13 18:24:37,785 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6591760299625468 [2021-11-13 18:24:37,785 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 704 transitions. [2021-11-13 18:24:37,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 704 transitions. [2021-11-13 18:24:37,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:24:37,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 704 transitions. [2021-11-13 18:24:37,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.666666666666664) internal successors, (704), 12 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:37,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:37,795 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:37,795 INFO L186 Difference]: Start difference. First operand has 100 places, 80 transitions, 247 flow. Second operand 12 states and 704 transitions. [2021-11-13 18:24:37,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 519 flow [2021-11-13 18:24:37,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 113 transitions, 474 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-11-13 18:24:37,810 INFO L242 Difference]: Finished difference. Result has 104 places, 84 transitions, 301 flow [2021-11-13 18:24:37,810 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=301, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2021-11-13 18:24:37,813 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2021-11-13 18:24:37,813 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 301 flow [2021-11-13 18:24:37,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:37,814 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:37,815 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] [2021-11-13 18:24:37,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:24:37,815 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:24:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:37,817 INFO L85 PathProgramCache]: Analyzing trace with hash -211036747, now seen corresponding path program 4 times [2021-11-13 18:24:37,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:37,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092292979] [2021-11-13 18:24:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:37,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:38,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:38,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092292979] [2021-11-13 18:24:38,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092292979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:38,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:38,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 18:24:38,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721578908] [2021-11-13 18:24:38,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:38,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:24:38,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:24:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:24:38,373 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-11-13 18:24:38,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 301 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:38,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:38,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-11-13 18:24:38,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:24:38,884 INFO L129 PetriNetUnfolder]: 71/294 cut-off events. [2021-11-13 18:24:38,884 INFO L130 PetriNetUnfolder]: For 225/237 co-relation queries the response was YES. [2021-11-13 18:24:38,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 294 events. 71/294 cut-off events. For 225/237 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1338 event pairs, 36 based on Foata normal form. 4/291 useless extension candidates. Maximal degree in co-relation 667. Up to 105 conditions per place. [2021-11-13 18:24:38,889 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 15 changer transitions 6/114 dead transitions. [2021-11-13 18:24:38,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 114 transitions, 559 flow [2021-11-13 18:24:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:24:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-13 18:24:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 703 transitions. [2021-11-13 18:24:38,894 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6582397003745318 [2021-11-13 18:24:38,894 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 703 transitions. [2021-11-13 18:24:38,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 703 transitions. [2021-11-13 18:24:38,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:24:38,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 703 transitions. [2021-11-13 18:24:38,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.583333333333336) internal successors, (703), 12 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:38,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:38,902 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:38,903 INFO L186 Difference]: Start difference. First operand has 104 places, 84 transitions, 301 flow. Second operand 12 states and 703 transitions. [2021-11-13 18:24:38,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 114 transitions, 559 flow [2021-11-13 18:24:38,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 520 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-11-13 18:24:38,914 INFO L242 Difference]: Finished difference. Result has 110 places, 86 transitions, 352 flow [2021-11-13 18:24:38,915 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2021-11-13 18:24:38,919 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 31 predicate places. [2021-11-13 18:24:38,920 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 352 flow [2021-11-13 18:24:38,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:38,921 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:38,921 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] [2021-11-13 18:24:38,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:24:38,922 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:24:38,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:38,924 INFO L85 PathProgramCache]: Analyzing trace with hash -81000629, now seen corresponding path program 5 times [2021-11-13 18:24:38,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:38,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073897078] [2021-11-13 18:24:38,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:38,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:39,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:39,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073897078] [2021-11-13 18:24:39,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073897078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:39,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:39,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 18:24:39,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786758717] [2021-11-13 18:24:39,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:39,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:24:39,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:24:39,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:24:39,459 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-11-13 18:24:39,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 352 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:39,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:39,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-11-13 18:24:39,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:24:39,980 INFO L129 PetriNetUnfolder]: 71/283 cut-off events. [2021-11-13 18:24:39,980 INFO L130 PetriNetUnfolder]: For 306/306 co-relation queries the response was YES. [2021-11-13 18:24:39,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 283 events. 71/283 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1267 event pairs, 36 based on Foata normal form. 1/279 useless extension candidates. Maximal degree in co-relation 676. Up to 105 conditions per place. [2021-11-13 18:24:39,985 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 14 changer transitions 9/108 dead transitions. [2021-11-13 18:24:39,985 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 563 flow [2021-11-13 18:24:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:24:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-13 18:24:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2021-11-13 18:24:39,989 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2021-11-13 18:24:39,990 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2021-11-13 18:24:39,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2021-11-13 18:24:39,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:24:39,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2021-11-13 18:24:39,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:39,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:39,998 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:39,998 INFO L186 Difference]: Start difference. First operand has 110 places, 86 transitions, 352 flow. Second operand 12 states and 696 transitions. [2021-11-13 18:24:39,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 563 flow [2021-11-13 18:24:40,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 526 flow, removed 10 selfloop flow, removed 8 redundant places. [2021-11-13 18:24:40,009 INFO L242 Difference]: Finished difference. Result has 115 places, 86 transitions, 368 flow [2021-11-13 18:24:40,010 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=368, PETRI_PLACES=115, PETRI_TRANSITIONS=86} [2021-11-13 18:24:40,014 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 36 predicate places. [2021-11-13 18:24:40,015 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 86 transitions, 368 flow [2021-11-13 18:24:40,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:40,015 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:40,016 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] [2021-11-13 18:24:40,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:24:40,016 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:24:40,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:40,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1009642839, now seen corresponding path program 6 times [2021-11-13 18:24:40,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:40,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915498235] [2021-11-13 18:24:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:40,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:40,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:40,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915498235] [2021-11-13 18:24:40,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915498235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:40,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:40,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 18:24:40,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948534680] [2021-11-13 18:24:40,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:40,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:24:40,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:40,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:24:40,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:24:40,515 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-11-13 18:24:40,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 86 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:40,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:40,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-11-13 18:24:40,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:24:40,996 INFO L129 PetriNetUnfolder]: 68/250 cut-off events. [2021-11-13 18:24:40,997 INFO L130 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2021-11-13 18:24:40,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 250 events. 68/250 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 976 event pairs, 34 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 620. Up to 105 conditions per place. [2021-11-13 18:24:41,001 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 14 changer transitions 11/102 dead transitions. [2021-11-13 18:24:41,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 102 transitions, 547 flow [2021-11-13 18:24:41,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:24:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-13 18:24:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 690 transitions. [2021-11-13 18:24:41,006 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6460674157303371 [2021-11-13 18:24:41,006 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 690 transitions. [2021-11-13 18:24:41,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 690 transitions. [2021-11-13 18:24:41,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:24:41,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 690 transitions. [2021-11-13 18:24:41,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.5) internal successors, (690), 12 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:41,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:41,014 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:41,014 INFO L186 Difference]: Start difference. First operand has 115 places, 86 transitions, 368 flow. Second operand 12 states and 690 transitions. [2021-11-13 18:24:41,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 102 transitions, 547 flow [2021-11-13 18:24:41,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 499 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-11-13 18:24:41,022 INFO L242 Difference]: Finished difference. Result has 114 places, 85 transitions, 350 flow [2021-11-13 18:24:41,022 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=114, PETRI_TRANSITIONS=85} [2021-11-13 18:24:41,023 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 35 predicate places. [2021-11-13 18:24:41,023 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 85 transitions, 350 flow [2021-11-13 18:24:41,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:41,024 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:41,025 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] [2021-11-13 18:24:41,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:24:41,025 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:24:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:41,026 INFO L85 PathProgramCache]: Analyzing trace with hash 239848237, now seen corresponding path program 1 times [2021-11-13 18:24:41,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:41,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888643411] [2021-11-13 18:24:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:41,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:41,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:41,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888643411] [2021-11-13 18:24:41,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888643411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:41,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724392489] [2021-11-13 18:24:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:41,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:41,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:41,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:41,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:24:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:41,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:24:41,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:42,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:24:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:43,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724392489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:24:43,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:24:43,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-11-13 18:24:43,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785537231] [2021-11-13 18:24:43,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:24:43,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:24:43,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:43,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:24:43,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:24:43,549 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:24:43,552 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 85 transitions, 350 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:43,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:43,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:24:43,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:24:45,833 INFO L129 PetriNetUnfolder]: 165/569 cut-off events. [2021-11-13 18:24:45,833 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2021-11-13 18:24:45,837 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1272 conditions, 569 events. 165/569 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3005 event pairs, 10 based on Foata normal form. 11/580 useless extension candidates. Maximal degree in co-relation 1251. Up to 111 conditions per place. [2021-11-13 18:24:45,842 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 105 selfloop transitions, 80 changer transitions 11/238 dead transitions. [2021-11-13 18:24:45,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 238 transitions, 1269 flow [2021-11-13 18:24:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-13 18:24:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-13 18:24:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2480 transitions. [2021-11-13 18:24:45,856 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6332992849846782 [2021-11-13 18:24:45,856 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2480 transitions. [2021-11-13 18:24:45,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2480 transitions. [2021-11-13 18:24:45,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:24:45,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2480 transitions. [2021-11-13 18:24:45,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 56.36363636363637) internal successors, (2480), 44 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:45,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 89.0) internal successors, (4005), 45 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:45,887 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 89.0) internal successors, (4005), 45 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:45,888 INFO L186 Difference]: Start difference. First operand has 114 places, 85 transitions, 350 flow. Second operand 44 states and 2480 transitions. [2021-11-13 18:24:45,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 238 transitions, 1269 flow [2021-11-13 18:24:45,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 238 transitions, 1169 flow, removed 21 selfloop flow, removed 16 redundant places. [2021-11-13 18:24:45,900 INFO L242 Difference]: Finished difference. Result has 147 places, 151 transitions, 744 flow [2021-11-13 18:24:45,901 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=744, PETRI_PLACES=147, PETRI_TRANSITIONS=151} [2021-11-13 18:24:45,904 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 68 predicate places. [2021-11-13 18:24:45,904 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 151 transitions, 744 flow [2021-11-13 18:24:45,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:45,906 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:45,906 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] [2021-11-13 18:24:45,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:46,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 18:24:46,122 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:24:46,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:46,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1169578921, now seen corresponding path program 2 times [2021-11-13 18:24:46,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:46,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233587788] [2021-11-13 18:24:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:46,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:46,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:46,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233587788] [2021-11-13 18:24:46,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233587788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:46,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845775943] [2021-11-13 18:24:46,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:24:46,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:46,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:46,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:46,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:24:46,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:24:46,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:24:46,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:24:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:47,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:24:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:48,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845775943] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:24:48,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:24:48,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-11-13 18:24:48,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261285243] [2021-11-13 18:24:48,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:24:48,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:24:48,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:48,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:24:48,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:24:48,682 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:24:48,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 151 transitions, 744 flow. Second operand has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:48,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:48,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:24:48,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:24:50,552 INFO L129 PetriNetUnfolder]: 195/680 cut-off events. [2021-11-13 18:24:50,553 INFO L130 PetriNetUnfolder]: For 601/603 co-relation queries the response was YES. [2021-11-13 18:24:50,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1890 conditions, 680 events. 195/680 cut-off events. For 601/603 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3927 event pairs, 20 based on Foata normal form. 3/681 useless extension candidates. Maximal degree in co-relation 1866. Up to 193 conditions per place. [2021-11-13 18:24:50,564 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 95 selfloop transitions, 108 changer transitions 6/251 dead transitions. [2021-11-13 18:24:50,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 251 transitions, 1651 flow [2021-11-13 18:24:50,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-13 18:24:50,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-13 18:24:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1908 transitions. [2021-11-13 18:24:50,571 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6305353602115004 [2021-11-13 18:24:50,571 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1908 transitions. [2021-11-13 18:24:50,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1908 transitions. [2021-11-13 18:24:50,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:24:50,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1908 transitions. [2021-11-13 18:24:50,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 56.11764705882353) internal successors, (1908), 34 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:50,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 89.0) internal successors, (3115), 35 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:50,598 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 89.0) internal successors, (3115), 35 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:50,599 INFO L186 Difference]: Start difference. First operand has 147 places, 151 transitions, 744 flow. Second operand 34 states and 1908 transitions. [2021-11-13 18:24:50,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 251 transitions, 1651 flow [2021-11-13 18:24:50,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 251 transitions, 1510 flow, removed 55 selfloop flow, removed 9 redundant places. [2021-11-13 18:24:50,627 INFO L242 Difference]: Finished difference. Result has 176 places, 192 transitions, 1199 flow [2021-11-13 18:24:50,628 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1199, PETRI_PLACES=176, PETRI_TRANSITIONS=192} [2021-11-13 18:24:50,629 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 97 predicate places. [2021-11-13 18:24:50,631 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 192 transitions, 1199 flow [2021-11-13 18:24:50,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:50,633 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:50,633 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] [2021-11-13 18:24:50,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:50,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-13 18:24:50,847 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:24:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:50,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1621198539, now seen corresponding path program 3 times [2021-11-13 18:24:50,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:50,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949512406] [2021-11-13 18:24:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:50,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:51,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:51,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949512406] [2021-11-13 18:24:51,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949512406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:51,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229256904] [2021-11-13 18:24:51,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:24:51,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:51,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:51,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:51,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:24:51,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 18:24:51,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:24:51,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:24:51,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:52,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:24:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:53,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229256904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:24:53,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:24:53,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-11-13 18:24:53,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268357031] [2021-11-13 18:24:53,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:24:53,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:24:53,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:53,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:24:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:24:53,138 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:24:53,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 192 transitions, 1199 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:53,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:53,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:24:53,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:24:56,652 INFO L129 PetriNetUnfolder]: 218/769 cut-off events. [2021-11-13 18:24:56,653 INFO L130 PetriNetUnfolder]: For 1040/1040 co-relation queries the response was YES. [2021-11-13 18:24:56,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2401 conditions, 769 events. 218/769 cut-off events. For 1040/1040 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4639 event pairs, 18 based on Foata normal form. 1/762 useless extension candidates. Maximal degree in co-relation 2372. Up to 131 conditions per place. [2021-11-13 18:24:56,664 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 119 selfloop transitions, 157 changer transitions 6/324 dead transitions. [2021-11-13 18:24:56,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 324 transitions, 2480 flow [2021-11-13 18:24:56,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-13 18:24:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-11-13 18:24:56,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3081 transitions. [2021-11-13 18:24:56,675 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.629417773237998 [2021-11-13 18:24:56,675 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3081 transitions. [2021-11-13 18:24:56,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3081 transitions. [2021-11-13 18:24:56,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:24:56,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3081 transitions. [2021-11-13 18:24:56,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 56.018181818181816) internal successors, (3081), 55 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:56,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 89.0) internal successors, (4984), 56 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:56,701 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 89.0) internal successors, (4984), 56 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:56,701 INFO L186 Difference]: Start difference. First operand has 176 places, 192 transitions, 1199 flow. Second operand 55 states and 3081 transitions. [2021-11-13 18:24:56,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 324 transitions, 2480 flow [2021-11-13 18:24:56,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 324 transitions, 2422 flow, removed 16 selfloop flow, removed 11 redundant places. [2021-11-13 18:24:56,729 INFO L242 Difference]: Finished difference. Result has 226 places, 240 transitions, 1926 flow [2021-11-13 18:24:56,729 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1926, PETRI_PLACES=226, PETRI_TRANSITIONS=240} [2021-11-13 18:24:56,730 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 147 predicate places. [2021-11-13 18:24:56,731 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 240 transitions, 1926 flow [2021-11-13 18:24:56,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:56,732 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:56,733 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] [2021-11-13 18:24:56,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:56,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:56,935 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:24:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:56,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1430364799, now seen corresponding path program 4 times [2021-11-13 18:24:56,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:56,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396403067] [2021-11-13 18:24:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:56,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:57,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:57,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396403067] [2021-11-13 18:24:57,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396403067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:57,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335430503] [2021-11-13 18:24:57,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:24:57,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:57,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:57,377 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:57,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:24:57,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:24:57,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:24:57,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:24:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:58,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:24:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:59,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335430503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:24:59,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:24:59,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-11-13 18:24:59,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780337894] [2021-11-13 18:24:59,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:24:59,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:24:59,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:59,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:24:59,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:24:59,484 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:24:59,487 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 240 transitions, 1926 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:59,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:59,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:24:59,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:25:06,838 INFO L129 PetriNetUnfolder]: 461/1563 cut-off events. [2021-11-13 18:25:06,839 INFO L130 PetriNetUnfolder]: For 5016/5018 co-relation queries the response was YES. [2021-11-13 18:25:06,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5858 conditions, 1563 events. 461/1563 cut-off events. For 5016/5018 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11754 event pairs, 4 based on Foata normal form. 5/1557 useless extension candidates. Maximal degree in co-relation 5821. Up to 185 conditions per place. [2021-11-13 18:25:06,862 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 225 selfloop transitions, 362 changer transitions 15/644 dead transitions. [2021-11-13 18:25:06,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 644 transitions, 6157 flow [2021-11-13 18:25:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-13 18:25:06,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-11-13 18:25:06,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 6273 transitions. [2021-11-13 18:25:06,880 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6293138041733547 [2021-11-13 18:25:06,881 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 6273 transitions. [2021-11-13 18:25:06,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 6273 transitions. [2021-11-13 18:25:06,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:25:06,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 6273 transitions. [2021-11-13 18:25:06,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 56.00892857142857) internal successors, (6273), 112 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:06,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 89.0) internal successors, (10057), 113 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:06,929 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 89.0) internal successors, (10057), 113 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:06,930 INFO L186 Difference]: Start difference. First operand has 226 places, 240 transitions, 1926 flow. Second operand 112 states and 6273 transitions. [2021-11-13 18:25:06,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 644 transitions, 6157 flow [2021-11-13 18:25:06,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 644 transitions, 5886 flow, removed 45 selfloop flow, removed 17 redundant places. [2021-11-13 18:25:06,996 INFO L242 Difference]: Finished difference. Result has 342 places, 462 transitions, 4509 flow [2021-11-13 18:25:06,997 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=4509, PETRI_PLACES=342, PETRI_TRANSITIONS=462} [2021-11-13 18:25:06,998 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 263 predicate places. [2021-11-13 18:25:06,998 INFO L470 AbstractCegarLoop]: Abstraction has has 342 places, 462 transitions, 4509 flow [2021-11-13 18:25:07,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:07,001 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:25:07,001 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] [2021-11-13 18:25:07,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:25:07,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:25:07,221 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:25:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:07,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1918827061, now seen corresponding path program 5 times [2021-11-13 18:25:07,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:25:07,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887025071] [2021-11-13 18:25:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:07,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:25:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:07,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:25:07,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887025071] [2021-11-13 18:25:07,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887025071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:25:07,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742062233] [2021-11-13 18:25:07,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:25:07,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:25:07,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:25:07,645 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:25:07,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:25:07,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:25:07,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:25:07,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:25:07,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:08,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:09,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742062233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:25:09,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:25:09,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-11-13 18:25:09,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657831555] [2021-11-13 18:25:09,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:25:09,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:25:09,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:25:09,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:25:09,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:25:09,581 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:25:09,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 462 transitions, 4509 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:09,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:25:09,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:25:09,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:25:11,426 INFO L129 PetriNetUnfolder]: 459/1568 cut-off events. [2021-11-13 18:25:11,426 INFO L130 PetriNetUnfolder]: For 9957/9957 co-relation queries the response was YES. [2021-11-13 18:25:11,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7290 conditions, 1568 events. 459/1568 cut-off events. For 9957/9957 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11831 event pairs, 39 based on Foata normal form. 1/1561 useless extension candidates. Maximal degree in co-relation 7227. Up to 560 conditions per place. [2021-11-13 18:25:11,531 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 185 selfloop transitions, 276 changer transitions 6/509 dead transitions. [2021-11-13 18:25:11,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 509 transitions, 5916 flow [2021-11-13 18:25:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-13 18:25:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-13 18:25:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1452 transitions. [2021-11-13 18:25:11,536 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6274848746758859 [2021-11-13 18:25:11,536 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1452 transitions. [2021-11-13 18:25:11,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1452 transitions. [2021-11-13 18:25:11,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:25:11,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1452 transitions. [2021-11-13 18:25:11,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.84615384615385) internal successors, (1452), 26 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:11,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:11,547 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:11,547 INFO L186 Difference]: Start difference. First operand has 342 places, 462 transitions, 4509 flow. Second operand 26 states and 1452 transitions. [2021-11-13 18:25:11,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 509 transitions, 5916 flow [2021-11-13 18:25:11,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 509 transitions, 5363 flow, removed 157 selfloop flow, removed 26 redundant places. [2021-11-13 18:25:11,667 INFO L242 Difference]: Finished difference. Result has 340 places, 472 transitions, 4924 flow [2021-11-13 18:25:11,668 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4023, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4924, PETRI_PLACES=340, PETRI_TRANSITIONS=472} [2021-11-13 18:25:11,669 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 261 predicate places. [2021-11-13 18:25:11,669 INFO L470 AbstractCegarLoop]: Abstraction has has 340 places, 472 transitions, 4924 flow [2021-11-13 18:25:11,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:11,670 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:25:11,671 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] [2021-11-13 18:25:11,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:25:11,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 18:25:11,880 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:25:11,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:11,881 INFO L85 PathProgramCache]: Analyzing trace with hash -998323325, now seen corresponding path program 6 times [2021-11-13 18:25:11,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:25:11,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946961983] [2021-11-13 18:25:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:11,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:25:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:12,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:25:12,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946961983] [2021-11-13 18:25:12,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946961983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:25:12,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482607291] [2021-11-13 18:25:12,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:25:12,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:25:12,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:25:12,227 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:25:12,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:25:12,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-13 18:25:12,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:25:12,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:25:12,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:13,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:14,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482607291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:25:14,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:25:14,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-11-13 18:25:14,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733931167] [2021-11-13 18:25:14,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:25:14,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:25:14,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:25:14,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:25:14,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:25:14,273 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:25:14,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 472 transitions, 4924 flow. Second operand has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:14,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:25:14,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:25:14,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:25:16,826 INFO L129 PetriNetUnfolder]: 581/1903 cut-off events. [2021-11-13 18:25:16,826 INFO L130 PetriNetUnfolder]: For 11779/11779 co-relation queries the response was YES. [2021-11-13 18:25:16,842 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8863 conditions, 1903 events. 581/1903 cut-off events. For 11779/11779 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14969 event pairs, 27 based on Foata normal form. 1/1890 useless extension candidates. Maximal degree in co-relation 8802. Up to 550 conditions per place. [2021-11-13 18:25:16,860 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 255 selfloop transitions, 344 changer transitions 6/647 dead transitions. [2021-11-13 18:25:16,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 647 transitions, 7715 flow [2021-11-13 18:25:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-13 18:25:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-13 18:25:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2185 transitions. [2021-11-13 18:25:16,865 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6295015845577643 [2021-11-13 18:25:16,866 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2185 transitions. [2021-11-13 18:25:16,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2185 transitions. [2021-11-13 18:25:16,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:25:16,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2185 transitions. [2021-11-13 18:25:16,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.02564102564103) internal successors, (2185), 39 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:16,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:16,880 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:16,881 INFO L186 Difference]: Start difference. First operand has 340 places, 472 transitions, 4924 flow. Second operand 39 states and 2185 transitions. [2021-11-13 18:25:16,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 647 transitions, 7715 flow [2021-11-13 18:25:17,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 647 transitions, 7438 flow, removed 5 selfloop flow, removed 17 redundant places. [2021-11-13 18:25:17,037 INFO L242 Difference]: Finished difference. Result has 370 places, 556 transitions, 6792 flow [2021-11-13 18:25:17,038 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4676, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6792, PETRI_PLACES=370, PETRI_TRANSITIONS=556} [2021-11-13 18:25:17,039 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 291 predicate places. [2021-11-13 18:25:17,039 INFO L470 AbstractCegarLoop]: Abstraction has has 370 places, 556 transitions, 6792 flow [2021-11-13 18:25:17,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:17,040 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:25:17,041 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] [2021-11-13 18:25:17,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:25:17,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:25:17,255 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:25:17,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:17,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1074264881, now seen corresponding path program 7 times [2021-11-13 18:25:17,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:25:17,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948297535] [2021-11-13 18:25:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:17,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:25:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:17,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:25:17,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948297535] [2021-11-13 18:25:17,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948297535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:25:17,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081931041] [2021-11-13 18:25:17,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:25:17,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:25:17,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:25:17,586 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:25:17,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:25:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:17,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:25:17,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:18,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:19,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081931041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:25:19,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:25:19,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-11-13 18:25:19,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414345047] [2021-11-13 18:25:19,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:25:19,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:25:19,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:25:19,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:25:19,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:25:19,225 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:25:19,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 556 transitions, 6792 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:19,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:25:19,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:25:19,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:25:23,373 INFO L129 PetriNetUnfolder]: 667/2137 cut-off events. [2021-11-13 18:25:23,373 INFO L130 PetriNetUnfolder]: For 18450/18450 co-relation queries the response was YES. [2021-11-13 18:25:23,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11156 conditions, 2137 events. 667/2137 cut-off events. For 18450/18450 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17273 event pairs, 27 based on Foata normal form. 1/2122 useless extension candidates. Maximal degree in co-relation 11086. Up to 566 conditions per place. [2021-11-13 18:25:23,422 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 210 selfloop transitions, 508 changer transitions 6/766 dead transitions. [2021-11-13 18:25:23,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 766 transitions, 10389 flow [2021-11-13 18:25:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-13 18:25:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-11-13 18:25:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3334 transitions. [2021-11-13 18:25:23,430 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6243445692883896 [2021-11-13 18:25:23,430 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3334 transitions. [2021-11-13 18:25:23,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3334 transitions. [2021-11-13 18:25:23,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:25:23,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3334 transitions. [2021-11-13 18:25:23,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 55.56666666666667) internal successors, (3334), 60 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:23,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 89.0) internal successors, (5429), 61 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:23,451 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 89.0) internal successors, (5429), 61 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:23,451 INFO L186 Difference]: Start difference. First operand has 370 places, 556 transitions, 6792 flow. Second operand 60 states and 3334 transitions. [2021-11-13 18:25:23,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 766 transitions, 10389 flow [2021-11-13 18:25:23,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 766 transitions, 10230 flow, removed 46 selfloop flow, removed 15 redundant places. [2021-11-13 18:25:23,640 INFO L242 Difference]: Finished difference. Result has 424 places, 691 transitions, 9932 flow [2021-11-13 18:25:23,641 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=6659, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=9932, PETRI_PLACES=424, PETRI_TRANSITIONS=691} [2021-11-13 18:25:23,641 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 345 predicate places. [2021-11-13 18:25:23,641 INFO L470 AbstractCegarLoop]: Abstraction has has 424 places, 691 transitions, 9932 flow [2021-11-13 18:25:23,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:23,642 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:25:23,642 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] [2021-11-13 18:25:23,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:25:23,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 18:25:23,843 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:25:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:23,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1856414975, now seen corresponding path program 8 times [2021-11-13 18:25:23,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:25:23,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987414787] [2021-11-13 18:25:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:23,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:25:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:24,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:25:24,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987414787] [2021-11-13 18:25:24,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987414787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:25:24,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308101671] [2021-11-13 18:25:24,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:25:24,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:25:24,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:25:24,283 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:25:24,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:25:24,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:25:24,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:25:24,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:25:24,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:25,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:26,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308101671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:25:26,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:25:26,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-11-13 18:25:26,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098426364] [2021-11-13 18:25:26,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:25:26,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:25:26,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:25:26,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:25:26,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:25:26,146 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:25:26,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 691 transitions, 9932 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:26,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:25:26,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:25:26,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:25:32,011 INFO L129 PetriNetUnfolder]: 775/2510 cut-off events. [2021-11-13 18:25:32,011 INFO L130 PetriNetUnfolder]: For 27527/27527 co-relation queries the response was YES. [2021-11-13 18:25:32,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14584 conditions, 2510 events. 775/2510 cut-off events. For 27527/27527 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 21452 event pairs, 29 based on Foata normal form. 2/2494 useless extension candidates. Maximal degree in co-relation 14505. Up to 539 conditions per place. [2021-11-13 18:25:32,062 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 215 selfloop transitions, 615 changer transitions 12/884 dead transitions. [2021-11-13 18:25:32,062 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 884 transitions, 13922 flow [2021-11-13 18:25:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-13 18:25:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-11-13 18:25:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4770 transitions. [2021-11-13 18:25:32,075 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6232035536974131 [2021-11-13 18:25:32,075 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4770 transitions. [2021-11-13 18:25:32,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4770 transitions. [2021-11-13 18:25:32,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:25:32,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4770 transitions. [2021-11-13 18:25:32,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 55.46511627906977) internal successors, (4770), 86 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:32,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 89.0) internal successors, (7743), 87 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:32,112 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 89.0) internal successors, (7743), 87 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:32,112 INFO L186 Difference]: Start difference. First operand has 424 places, 691 transitions, 9932 flow. Second operand 86 states and 4770 transitions. [2021-11-13 18:25:32,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 884 transitions, 13922 flow [2021-11-13 18:25:32,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 884 transitions, 13534 flow, removed 87 selfloop flow, removed 26 redundant places. [2021-11-13 18:25:32,422 INFO L242 Difference]: Finished difference. Result has 492 places, 789 transitions, 12668 flow [2021-11-13 18:25:32,423 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=9590, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=12668, PETRI_PLACES=492, PETRI_TRANSITIONS=789} [2021-11-13 18:25:32,424 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 413 predicate places. [2021-11-13 18:25:32,424 INFO L470 AbstractCegarLoop]: Abstraction has has 492 places, 789 transitions, 12668 flow [2021-11-13 18:25:32,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:32,425 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:25:32,425 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] [2021-11-13 18:25:32,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:25:32,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:25:32,639 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:25:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1205344079, now seen corresponding path program 9 times [2021-11-13 18:25:32,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:25:32,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479208706] [2021-11-13 18:25:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:32,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:25:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:33,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:25:33,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479208706] [2021-11-13 18:25:33,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479208706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:25:33,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643734517] [2021-11-13 18:25:33,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:25:33,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:25:33,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:25:33,002 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:25:33,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:25:33,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 18:25:33,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:25:33,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:25:33,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:34,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:34,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643734517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:25:34,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:25:34,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-13 18:25:34,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244311939] [2021-11-13 18:25:34,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:25:34,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:25:34,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:25:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:25:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:25:34,744 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:25:34,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 789 transitions, 12668 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:34,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:25:34,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:25:34,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:25:37,272 INFO L129 PetriNetUnfolder]: 784/2744 cut-off events. [2021-11-13 18:25:37,273 INFO L130 PetriNetUnfolder]: For 36617/36617 co-relation queries the response was YES. [2021-11-13 18:25:37,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16567 conditions, 2744 events. 784/2744 cut-off events. For 36617/36617 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 24598 event pairs, 58 based on Foata normal form. 1/2734 useless extension candidates. Maximal degree in co-relation 16478. Up to 1014 conditions per place. [2021-11-13 18:25:37,325 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 327 selfloop transitions, 461 changer transitions 6/836 dead transitions. [2021-11-13 18:25:37,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 836 transitions, 14792 flow [2021-11-13 18:25:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-13 18:25:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-13 18:25:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2021-11-13 18:25:37,330 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6260533707865169 [2021-11-13 18:25:37,330 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2021-11-13 18:25:37,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2021-11-13 18:25:37,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:25:37,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2021-11-13 18:25:37,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:37,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:37,343 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:37,344 INFO L186 Difference]: Start difference. First operand has 492 places, 789 transitions, 12668 flow. Second operand 32 states and 1783 transitions. [2021-11-13 18:25:37,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 836 transitions, 14792 flow [2021-11-13 18:25:37,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 836 transitions, 14030 flow, removed 149 selfloop flow, removed 60 redundant places. [2021-11-13 18:25:37,935 INFO L242 Difference]: Finished difference. Result has 465 places, 802 transitions, 13525 flow [2021-11-13 18:25:37,937 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=11928, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=13525, PETRI_PLACES=465, PETRI_TRANSITIONS=802} [2021-11-13 18:25:37,937 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 386 predicate places. [2021-11-13 18:25:37,938 INFO L470 AbstractCegarLoop]: Abstraction has has 465 places, 802 transitions, 13525 flow [2021-11-13 18:25:37,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:37,939 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:25:37,939 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] [2021-11-13 18:25:37,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:25:38,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:25:38,155 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:25:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:38,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2063244491, now seen corresponding path program 10 times [2021-11-13 18:25:38,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:25:38,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300954554] [2021-11-13 18:25:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:38,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:25:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:38,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:25:38,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300954554] [2021-11-13 18:25:38,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300954554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:25:38,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535581370] [2021-11-13 18:25:38,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:25:38,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:25:38,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:25:38,530 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:25:38,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:25:38,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:25:38,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:25:38,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:25:38,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:39,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:40,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535581370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:25:40,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:25:40,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-13 18:25:40,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495995935] [2021-11-13 18:25:40,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:25:40,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:25:40,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:25:40,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:25:40,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:25:40,454 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:25:40,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 802 transitions, 13525 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:40,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:25:40,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:25:40,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:25:45,404 INFO L129 PetriNetUnfolder]: 917/3275 cut-off events. [2021-11-13 18:25:45,404 INFO L130 PetriNetUnfolder]: For 41915/41915 co-relation queries the response was YES. [2021-11-13 18:25:45,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19822 conditions, 3275 events. 917/3275 cut-off events. For 41915/41915 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 30996 event pairs, 37 based on Foata normal form. 1/3273 useless extension candidates. Maximal degree in co-relation 19738. Up to 771 conditions per place. [2021-11-13 18:25:45,471 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 270 selfloop transitions, 699 changer transitions 6/1017 dead transitions. [2021-11-13 18:25:45,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1017 transitions, 18453 flow [2021-11-13 18:25:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-13 18:25:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-11-13 18:25:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3666 transitions. [2021-11-13 18:25:45,480 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6241062308478039 [2021-11-13 18:25:45,481 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3666 transitions. [2021-11-13 18:25:45,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3666 transitions. [2021-11-13 18:25:45,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:25:45,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3666 transitions. [2021-11-13 18:25:45,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 55.54545454545455) internal successors, (3666), 66 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:45,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 89.0) internal successors, (5963), 67 states have internal predecessors, (5963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:45,505 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 89.0) internal successors, (5963), 67 states have internal predecessors, (5963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:45,505 INFO L186 Difference]: Start difference. First operand has 465 places, 802 transitions, 13525 flow. Second operand 66 states and 3666 transitions. [2021-11-13 18:25:45,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1017 transitions, 18453 flow [2021-11-13 18:25:46,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 1017 transitions, 18314 flow, removed 20 selfloop flow, removed 20 redundant places. [2021-11-13 18:25:46,142 INFO L242 Difference]: Finished difference. Result has 521 places, 932 transitions, 17769 flow [2021-11-13 18:25:46,143 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=13391, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=17769, PETRI_PLACES=521, PETRI_TRANSITIONS=932} [2021-11-13 18:25:46,144 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 442 predicate places. [2021-11-13 18:25:46,144 INFO L470 AbstractCegarLoop]: Abstraction has has 521 places, 932 transitions, 17769 flow [2021-11-13 18:25:46,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:46,145 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:25:46,145 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] [2021-11-13 18:25:46,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-13 18:25:46,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 18:25:46,346 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:25:46,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:46,346 INFO L85 PathProgramCache]: Analyzing trace with hash 279907245, now seen corresponding path program 11 times [2021-11-13 18:25:46,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:25:46,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478158170] [2021-11-13 18:25:46,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:46,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:25:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:46,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:25:46,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478158170] [2021-11-13 18:25:46,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478158170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:25:46,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406699866] [2021-11-13 18:25:46,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:25:46,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:25:46,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:25:46,669 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:25:46,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:25:46,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:25:46,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:25:46,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:25:46,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:47,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:48,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406699866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:25:48,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:25:48,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-13 18:25:48,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977812585] [2021-11-13 18:25:48,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:25:48,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:25:48,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:25:48,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:25:48,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:25:48,089 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:25:48,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 932 transitions, 17769 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:48,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:25:48,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:25:48,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:25:50,669 INFO L129 PetriNetUnfolder]: 917/3261 cut-off events. [2021-11-13 18:25:50,669 INFO L130 PetriNetUnfolder]: For 52915/52915 co-relation queries the response was YES. [2021-11-13 18:25:50,708 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21646 conditions, 3261 events. 917/3261 cut-off events. For 52915/52915 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30753 event pairs, 109 based on Foata normal form. 1/3240 useless extension candidates. Maximal degree in co-relation 21551. Up to 1187 conditions per place. [2021-11-13 18:25:50,740 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 406 selfloop transitions, 506 changer transitions 6/960 dead transitions. [2021-11-13 18:25:50,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 960 transitions, 19985 flow [2021-11-13 18:25:50,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 18:25:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-13 18:25:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1503 transitions. [2021-11-13 18:25:50,745 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6254681647940075 [2021-11-13 18:25:50,745 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1503 transitions. [2021-11-13 18:25:50,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1503 transitions. [2021-11-13 18:25:50,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:25:50,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1503 transitions. [2021-11-13 18:25:50,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.666666666666664) internal successors, (1503), 27 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:50,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:50,755 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:50,756 INFO L186 Difference]: Start difference. First operand has 521 places, 932 transitions, 17769 flow. Second operand 27 states and 1503 transitions. [2021-11-13 18:25:50,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 960 transitions, 19985 flow [2021-11-13 18:25:51,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 960 transitions, 19650 flow, removed 63 selfloop flow, removed 28 redundant places. [2021-11-13 18:25:51,365 INFO L242 Difference]: Finished difference. Result has 520 places, 934 transitions, 18967 flow [2021-11-13 18:25:51,367 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=17433, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=18967, PETRI_PLACES=520, PETRI_TRANSITIONS=934} [2021-11-13 18:25:51,368 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 441 predicate places. [2021-11-13 18:25:51,368 INFO L470 AbstractCegarLoop]: Abstraction has has 520 places, 934 transitions, 18967 flow [2021-11-13 18:25:51,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:51,369 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:25:51,369 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] [2021-11-13 18:25:51,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:25:51,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 18:25:51,586 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:25:51,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:51,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1771949071, now seen corresponding path program 12 times [2021-11-13 18:25:51,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:25:51,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619137383] [2021-11-13 18:25:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:51,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:25:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:51,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:25:51,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619137383] [2021-11-13 18:25:51,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619137383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:25:51,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432594292] [2021-11-13 18:25:51,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:25:51,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:25:51,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:25:51,900 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:25:51,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:25:52,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-13 18:25:52,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:25:52,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:25:52,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:52,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:53,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432594292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:25:53,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:25:53,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-13 18:25:53,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887512550] [2021-11-13 18:25:53,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:25:53,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:25:53,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:25:53,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:25:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:25:53,597 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:25:53,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 934 transitions, 18967 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:53,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:25:53,600 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:25:53,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:25:56,265 INFO L129 PetriNetUnfolder]: 918/3264 cut-off events. [2021-11-13 18:25:56,265 INFO L130 PetriNetUnfolder]: For 58006/58006 co-relation queries the response was YES. [2021-11-13 18:25:56,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22561 conditions, 3264 events. 918/3264 cut-off events. For 58006/58006 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 30823 event pairs, 103 based on Foata normal form. 1/3246 useless extension candidates. Maximal degree in co-relation 22464. Up to 1164 conditions per place. [2021-11-13 18:25:56,315 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 400 selfloop transitions, 521 changer transitions 6/969 dead transitions. [2021-11-13 18:25:56,316 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 969 transitions, 21232 flow [2021-11-13 18:25:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-13 18:25:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-13 18:25:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1445 transitions. [2021-11-13 18:25:56,318 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6244598098530683 [2021-11-13 18:25:56,318 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1445 transitions. [2021-11-13 18:25:56,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1445 transitions. [2021-11-13 18:25:56,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:25:56,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1445 transitions. [2021-11-13 18:25:56,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.57692307692308) internal successors, (1445), 26 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:56,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:56,326 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:56,326 INFO L186 Difference]: Start difference. First operand has 520 places, 934 transitions, 18967 flow. Second operand 26 states and 1445 transitions. [2021-11-13 18:25:56,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 969 transitions, 21232 flow [2021-11-13 18:25:56,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 969 transitions, 20799 flow, removed 2 selfloop flow, removed 17 redundant places. [2021-11-13 18:25:56,867 INFO L242 Difference]: Finished difference. Result has 530 places, 943 transitions, 20121 flow [2021-11-13 18:25:56,868 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=18541, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=20121, PETRI_PLACES=530, PETRI_TRANSITIONS=943} [2021-11-13 18:25:56,869 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 451 predicate places. [2021-11-13 18:25:56,869 INFO L470 AbstractCegarLoop]: Abstraction has has 530 places, 943 transitions, 20121 flow [2021-11-13 18:25:56,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:56,869 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:25:56,869 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] [2021-11-13 18:25:56,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-13 18:25:57,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:25:57,070 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:25:57,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:57,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1001303513, now seen corresponding path program 13 times [2021-11-13 18:25:57,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:25:57,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875921499] [2021-11-13 18:25:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:57,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:25:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:57,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:25:57,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875921499] [2021-11-13 18:25:57,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875921499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:25:57,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397058415] [2021-11-13 18:25:57,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:25:57,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:25:57,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:25:57,335 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:25:57,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:25:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:57,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:25:57,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:58,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:58,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397058415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:25:58,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:25:58,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-13 18:25:58,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244472639] [2021-11-13 18:25:58,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:25:58,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:25:58,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:25:58,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:25:58,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:25:58,687 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:25:58,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 943 transitions, 20121 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:58,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:25:58,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:25:58,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:26:01,457 INFO L129 PetriNetUnfolder]: 917/3291 cut-off events. [2021-11-13 18:26:01,457 INFO L130 PetriNetUnfolder]: For 63950/63950 co-relation queries the response was YES. [2021-11-13 18:26:01,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23476 conditions, 3291 events. 917/3291 cut-off events. For 63950/63950 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 31179 event pairs, 111 based on Foata normal form. 1/3274 useless extension candidates. Maximal degree in co-relation 23372. Up to 1169 conditions per place. [2021-11-13 18:26:01,513 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 386 selfloop transitions, 541 changer transitions 6/975 dead transitions. [2021-11-13 18:26:01,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 975 transitions, 22413 flow [2021-11-13 18:26:01,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 18:26:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-13 18:26:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1666 transitions. [2021-11-13 18:26:01,517 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6239700374531835 [2021-11-13 18:26:01,517 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1666 transitions. [2021-11-13 18:26:01,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1666 transitions. [2021-11-13 18:26:01,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:26:01,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1666 transitions. [2021-11-13 18:26:01,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.53333333333333) internal successors, (1666), 30 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:01,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:01,526 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:01,526 INFO L186 Difference]: Start difference. First operand has 530 places, 943 transitions, 20121 flow. Second operand 30 states and 1666 transitions. [2021-11-13 18:26:01,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 975 transitions, 22413 flow [2021-11-13 18:26:02,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 975 transitions, 22233 flow, removed 7 selfloop flow, removed 13 redundant places. [2021-11-13 18:26:02,107 INFO L242 Difference]: Finished difference. Result has 550 places, 949 transitions, 21584 flow [2021-11-13 18:26:02,108 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=19947, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=535, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=21584, PETRI_PLACES=550, PETRI_TRANSITIONS=949} [2021-11-13 18:26:02,108 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 471 predicate places. [2021-11-13 18:26:02,109 INFO L470 AbstractCegarLoop]: Abstraction has has 550 places, 949 transitions, 21584 flow [2021-11-13 18:26:02,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:02,109 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:26:02,109 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] [2021-11-13 18:26:02,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:26:02,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:26:02,310 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:26:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:02,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1738791515, now seen corresponding path program 14 times [2021-11-13 18:26:02,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:02,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866843733] [2021-11-13 18:26:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:02,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:02,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:02,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866843733] [2021-11-13 18:26:02,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866843733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:26:02,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18785992] [2021-11-13 18:26:02,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:26:02,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:26:02,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:26:02,737 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:26:02,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 18:26:02,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:26:02,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:26:02,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:26:02,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:26:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:03,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:26:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:04,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18785992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:26:04,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:26:04,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-13 18:26:04,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695681144] [2021-11-13 18:26:04,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:26:04,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:26:04,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:04,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:26:04,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:26:04,337 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:26:04,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 949 transitions, 21584 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:04,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:26:04,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:26:04,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:26:12,619 INFO L129 PetriNetUnfolder]: 983/3534 cut-off events. [2021-11-13 18:26:12,619 INFO L130 PetriNetUnfolder]: For 76104/76104 co-relation queries the response was YES. [2021-11-13 18:26:12,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25940 conditions, 3534 events. 983/3534 cut-off events. For 76104/76104 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 34052 event pairs, 42 based on Foata normal form. 1/3533 useless extension candidates. Maximal degree in co-relation 25832. Up to 928 conditions per place. [2021-11-13 18:26:12,675 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 281 selfloop transitions, 809 changer transitions 6/1138 dead transitions. [2021-11-13 18:26:12,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 1138 transitions, 26712 flow [2021-11-13 18:26:12,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-13 18:26:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-11-13 18:26:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 5464 transitions. [2021-11-13 18:26:12,680 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.62013392350471 [2021-11-13 18:26:12,681 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 5464 transitions. [2021-11-13 18:26:12,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 5464 transitions. [2021-11-13 18:26:12,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:26:12,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 5464 transitions. [2021-11-13 18:26:12,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 55.19191919191919) internal successors, (5464), 99 states have internal predecessors, (5464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:12,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 89.0) internal successors, (8900), 100 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:12,706 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 89.0) internal successors, (8900), 100 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:12,706 INFO L186 Difference]: Start difference. First operand has 550 places, 949 transitions, 21584 flow. Second operand 99 states and 5464 transitions. [2021-11-13 18:26:12,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 1138 transitions, 26712 flow [2021-11-13 18:26:13,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 1138 transitions, 25902 flow, removed 13 selfloop flow, removed 21 redundant places. [2021-11-13 18:26:13,301 INFO L242 Difference]: Finished difference. Result has 642 places, 1057 transitions, 25133 flow [2021-11-13 18:26:13,302 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=20805, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=25133, PETRI_PLACES=642, PETRI_TRANSITIONS=1057} [2021-11-13 18:26:13,302 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 563 predicate places. [2021-11-13 18:26:13,302 INFO L470 AbstractCegarLoop]: Abstraction has has 642 places, 1057 transitions, 25133 flow [2021-11-13 18:26:13,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:13,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:26:13,303 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] [2021-11-13 18:26:13,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-13 18:26:13,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-13 18:26:13,504 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:26:13,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:13,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1966034895, now seen corresponding path program 15 times [2021-11-13 18:26:13,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:13,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798016159] [2021-11-13 18:26:13,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:13,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:13,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:13,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798016159] [2021-11-13 18:26:13,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798016159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:26:13,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403777593] [2021-11-13 18:26:13,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:26:13,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:26:13,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:26:13,795 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:26:13,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 18:26:13,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 18:26:13,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:26:13,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:26:13,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:26:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:14,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:26:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:15,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403777593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:26:15,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:26:15,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-13 18:26:15,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998967703] [2021-11-13 18:26:15,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:26:15,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:26:15,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:15,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:26:15,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:26:15,407 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:26:15,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 1057 transitions, 25133 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:15,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:26:15,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:26:15,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:26:18,786 INFO L129 PetriNetUnfolder]: 990/3581 cut-off events. [2021-11-13 18:26:18,786 INFO L130 PetriNetUnfolder]: For 102445/102445 co-relation queries the response was YES. [2021-11-13 18:26:18,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28112 conditions, 3581 events. 990/3581 cut-off events. For 102445/102445 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 34534 event pairs, 119 based on Foata normal form. 1/3579 useless extension candidates. Maximal degree in co-relation 27988. Up to 1470 conditions per place. [2021-11-13 18:26:18,868 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 435 selfloop transitions, 600 changer transitions 6/1083 dead transitions. [2021-11-13 18:26:18,868 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 1083 transitions, 27611 flow [2021-11-13 18:26:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-13 18:26:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-13 18:26:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1775 transitions. [2021-11-13 18:26:18,871 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6232443820224719 [2021-11-13 18:26:18,871 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1775 transitions. [2021-11-13 18:26:18,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1775 transitions. [2021-11-13 18:26:18,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:26:18,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1775 transitions. [2021-11-13 18:26:18,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.46875) internal successors, (1775), 32 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:18,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:18,880 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:18,880 INFO L186 Difference]: Start difference. First operand has 642 places, 1057 transitions, 25133 flow. Second operand 32 states and 1775 transitions. [2021-11-13 18:26:18,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 1083 transitions, 27611 flow [2021-11-13 18:26:20,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 1083 transitions, 26598 flow, removed 277 selfloop flow, removed 27 redundant places. [2021-11-13 18:26:20,105 INFO L242 Difference]: Finished difference. Result has 646 places, 1059 transitions, 25922 flow [2021-11-13 18:26:20,107 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=24122, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1056, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=595, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=25922, PETRI_PLACES=646, PETRI_TRANSITIONS=1059} [2021-11-13 18:26:20,108 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 567 predicate places. [2021-11-13 18:26:20,108 INFO L470 AbstractCegarLoop]: Abstraction has has 646 places, 1059 transitions, 25922 flow [2021-11-13 18:26:20,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:20,109 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:26:20,109 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] [2021-11-13 18:26:20,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:26:20,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-13 18:26:20,323 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:26:20,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:20,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1738018965, now seen corresponding path program 16 times [2021-11-13 18:26:20,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:20,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428137569] [2021-11-13 18:26:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:20,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:20,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:20,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428137569] [2021-11-13 18:26:20,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428137569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:26:20,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813773869] [2021-11-13 18:26:20,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:26:20,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:26:20,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:26:20,687 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:26:20,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 18:26:20,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:26:20,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:26:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:26:20,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:26:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:21,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:26:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:22,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813773869] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:26:22,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:26:22,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-11-13 18:26:22,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078655073] [2021-11-13 18:26:22,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:26:22,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:26:22,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:22,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:26:22,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:26:22,352 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:26:22,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 1059 transitions, 25922 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:22,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:26:22,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:26:22,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:26:28,322 INFO L129 PetriNetUnfolder]: 1230/4252 cut-off events. [2021-11-13 18:26:28,322 INFO L130 PetriNetUnfolder]: For 125562/125562 co-relation queries the response was YES. [2021-11-13 18:26:28,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34126 conditions, 4252 events. 1230/4252 cut-off events. For 125562/125562 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41816 event pairs, 84 based on Foata normal form. 2/4252 useless extension candidates. Maximal degree in co-relation 34002. Up to 983 conditions per place. [2021-11-13 18:26:28,407 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 434 selfloop transitions, 906 changer transitions 12/1394 dead transitions. [2021-11-13 18:26:28,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 1394 transitions, 35114 flow [2021-11-13 18:26:28,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-13 18:26:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-11-13 18:26:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4073 transitions. [2021-11-13 18:26:28,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6356117353308365 [2021-11-13 18:26:28,417 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4073 transitions. [2021-11-13 18:26:28,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4073 transitions. [2021-11-13 18:26:28,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:26:28,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4073 transitions. [2021-11-13 18:26:28,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 56.56944444444444) internal successors, (4073), 72 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:28,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 89.0) internal successors, (6497), 73 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:28,434 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 89.0) internal successors, (6497), 73 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:28,434 INFO L186 Difference]: Start difference. First operand has 646 places, 1059 transitions, 25922 flow. Second operand 72 states and 4073 transitions. [2021-11-13 18:26:28,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 1394 transitions, 35114 flow [2021-11-13 18:26:29,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 1394 transitions, 34658 flow, removed 6 selfloop flow, removed 21 redundant places. [2021-11-13 18:26:29,656 INFO L242 Difference]: Finished difference. Result has 708 places, 1262 transitions, 33435 flow [2021-11-13 18:26:29,658 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=25522, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=712, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=33435, PETRI_PLACES=708, PETRI_TRANSITIONS=1262} [2021-11-13 18:26:29,658 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 629 predicate places. [2021-11-13 18:26:29,659 INFO L470 AbstractCegarLoop]: Abstraction has has 708 places, 1262 transitions, 33435 flow [2021-11-13 18:26:29,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:29,659 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:26:29,660 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:29,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:26:29,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:26:29,884 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:26:29,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:29,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1646162825, now seen corresponding path program 1 times [2021-11-13 18:26:29,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:29,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160591910] [2021-11-13 18:26:29,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:29,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:30,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:30,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160591910] [2021-11-13 18:26:30,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160591910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:26:30,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069064765] [2021-11-13 18:26:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:30,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:26:30,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:26:30,199 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:26:30,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 18:26:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:30,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:26:30,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:26:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:30,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:26:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:31,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069064765] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:26:31,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:26:31,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2021-11-13 18:26:31,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091829356] [2021-11-13 18:26:31,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:26:31,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:26:31,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:31,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:26:31,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:26:31,381 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 89 [2021-11-13 18:26:31,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 1262 transitions, 33435 flow. Second operand has 37 states, 37 states have (on average 52.7027027027027) internal successors, (1950), 37 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:31,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:26:31,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 89 [2021-11-13 18:26:31,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:26:36,117 INFO L129 PetriNetUnfolder]: 1407/4570 cut-off events. [2021-11-13 18:26:36,117 INFO L130 PetriNetUnfolder]: For 148005/148015 co-relation queries the response was YES. [2021-11-13 18:26:36,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39356 conditions, 4570 events. 1407/4570 cut-off events. For 148005/148015 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 44570 event pairs, 192 based on Foata normal form. 7/4558 useless extension candidates. Maximal degree in co-relation 39211. Up to 1056 conditions per place. [2021-11-13 18:26:36,340 INFO L132 encePairwiseOnDemand]: 71/89 looper letters, 526 selfloop transitions, 819 changer transitions 27/1413 dead transitions. [2021-11-13 18:26:36,340 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 752 places, 1413 transitions, 38860 flow [2021-11-13 18:26:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-13 18:26:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-11-13 18:26:36,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3010 transitions. [2021-11-13 18:26:36,345 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.626300457761132 [2021-11-13 18:26:36,345 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3010 transitions. [2021-11-13 18:26:36,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3010 transitions. [2021-11-13 18:26:36,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:26:36,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3010 transitions. [2021-11-13 18:26:36,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 55.74074074074074) internal successors, (3010), 54 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:36,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:36,358 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 89.0) internal successors, (4895), 55 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:36,359 INFO L186 Difference]: Start difference. First operand has 708 places, 1262 transitions, 33435 flow. Second operand 54 states and 3010 transitions. [2021-11-13 18:26:36,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 752 places, 1413 transitions, 38860 flow [2021-11-13 18:26:37,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 1413 transitions, 38031 flow, removed 273 selfloop flow, removed 23 redundant places. [2021-11-13 18:26:37,698 INFO L242 Difference]: Finished difference. Result has 751 places, 1298 transitions, 36079 flow [2021-11-13 18:26:37,699 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=32720, PETRI_DIFFERENCE_MINUEND_PLACES=676, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=779, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=36079, PETRI_PLACES=751, PETRI_TRANSITIONS=1298} [2021-11-13 18:26:37,699 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 672 predicate places. [2021-11-13 18:26:37,699 INFO L470 AbstractCegarLoop]: Abstraction has has 751 places, 1298 transitions, 36079 flow [2021-11-13 18:26:37,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 52.7027027027027) internal successors, (1950), 37 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:37,700 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:26:37,700 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:37,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:26:37,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:26:37,904 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:26:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1663481837, now seen corresponding path program 17 times [2021-11-13 18:26:37,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:37,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907103866] [2021-11-13 18:26:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:37,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:38,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:38,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907103866] [2021-11-13 18:26:38,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907103866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:26:38,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661069271] [2021-11-13 18:26:38,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:26:38,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:26:38,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:26:38,262 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:26:38,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 18:26:38,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-13 18:26:38,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:26:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:26:38,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:26:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:39,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:26:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:40,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661069271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:26:40,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:26:40,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-13 18:26:40,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077285677] [2021-11-13 18:26:40,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:26:40,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 18:26:40,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:40,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 18:26:40,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:26:40,025 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:26:40,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 1298 transitions, 36079 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:40,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:26:40,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:26:40,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:26:48,271 INFO L129 PetriNetUnfolder]: 1471/4994 cut-off events. [2021-11-13 18:26:48,271 INFO L130 PetriNetUnfolder]: For 194398/194408 co-relation queries the response was YES. [2021-11-13 18:26:48,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46701 conditions, 4994 events. 1471/4994 cut-off events. For 194398/194408 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 50075 event pairs, 99 based on Foata normal form. 35/5008 useless extension candidates. Maximal degree in co-relation 46540. Up to 694 conditions per place. [2021-11-13 18:26:48,401 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 494 selfloop transitions, 1067 changer transitions 23/1627 dead transitions. [2021-11-13 18:26:48,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 1627 transitions, 47855 flow [2021-11-13 18:26:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-13 18:26:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-11-13 18:26:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 5526 transitions. [2021-11-13 18:26:48,409 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.627170582226762 [2021-11-13 18:26:48,409 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 5526 transitions. [2021-11-13 18:26:48,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 5526 transitions. [2021-11-13 18:26:48,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:26:48,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 5526 transitions. [2021-11-13 18:26:48,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 55.81818181818182) internal successors, (5526), 99 states have internal predecessors, (5526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:48,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 89.0) internal successors, (8900), 100 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:48,430 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 89.0) internal successors, (8900), 100 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:48,430 INFO L186 Difference]: Start difference. First operand has 751 places, 1298 transitions, 36079 flow. Second operand 99 states and 5526 transitions. [2021-11-13 18:26:48,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 1627 transitions, 47855 flow [2021-11-13 18:26:50,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 808 places, 1627 transitions, 47061 flow, removed 119 selfloop flow, removed 27 redundant places. [2021-11-13 18:26:50,119 INFO L242 Difference]: Finished difference. Result has 825 places, 1453 transitions, 43559 flow [2021-11-13 18:26:50,120 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=35464, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=918, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=43559, PETRI_PLACES=825, PETRI_TRANSITIONS=1453} [2021-11-13 18:26:50,121 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 746 predicate places. [2021-11-13 18:26:50,121 INFO L470 AbstractCegarLoop]: Abstraction has has 825 places, 1453 transitions, 43559 flow [2021-11-13 18:26:50,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:50,121 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:26:50,122 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:50,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:26:50,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:26:50,323 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:26:50,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:50,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1407148293, now seen corresponding path program 18 times [2021-11-13 18:26:50,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:50,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514539033] [2021-11-13 18:26:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:50,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:50,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:50,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514539033] [2021-11-13 18:26:50,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514539033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:26:50,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838802139] [2021-11-13 18:26:50,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:26:50,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:26:50,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:26:50,659 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:26:50,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 18:26:50,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-13 18:26:50,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:26:50,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:26:50,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:26:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:51,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:26:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:52,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838802139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:26:52,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:26:52,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-13 18:26:52,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806515218] [2021-11-13 18:26:52,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:26:52,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 18:26:52,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:52,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 18:26:52,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:26:52,574 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:26:52,576 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 825 places, 1453 transitions, 43559 flow. Second operand has 46 states, 46 states have (on average 53.630434782608695) internal successors, (2467), 46 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:52,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:26:52,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:26:52,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:27:00,913 INFO L129 PetriNetUnfolder]: 1534/5235 cut-off events. [2021-11-13 18:27:00,913 INFO L130 PetriNetUnfolder]: For 229117/229127 co-relation queries the response was YES. [2021-11-13 18:27:01,006 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50716 conditions, 5235 events. 1534/5235 cut-off events. For 229117/229127 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 52644 event pairs, 90 based on Foata normal form. 7/5223 useless extension candidates. Maximal degree in co-relation 50548. Up to 703 conditions per place. [2021-11-13 18:27:01,050 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 537 selfloop transitions, 1114 changer transitions 12/1706 dead transitions. [2021-11-13 18:27:01,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 903 places, 1706 transitions, 52124 flow [2021-11-13 18:27:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-13 18:27:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-11-13 18:27:01,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4834 transitions. [2021-11-13 18:27:01,056 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6315651946694539 [2021-11-13 18:27:01,056 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4834 transitions. [2021-11-13 18:27:01,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4834 transitions. [2021-11-13 18:27:01,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:27:01,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4834 transitions. [2021-11-13 18:27:01,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 56.2093023255814) internal successors, (4834), 86 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:01,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 89.0) internal successors, (7743), 87 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:01,078 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 89.0) internal successors, (7743), 87 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:01,079 INFO L186 Difference]: Start difference. First operand has 825 places, 1453 transitions, 43559 flow. Second operand 86 states and 4834 transitions. [2021-11-13 18:27:01,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 903 places, 1706 transitions, 52124 flow [2021-11-13 18:27:03,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 854 places, 1706 transitions, 49841 flow, removed 351 selfloop flow, removed 49 redundant places. [2021-11-13 18:27:03,245 INFO L242 Difference]: Finished difference. Result has 876 places, 1517 transitions, 46269 flow [2021-11-13 18:27:03,247 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=41614, PETRI_DIFFERENCE_MINUEND_PLACES=769, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1052, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=46269, PETRI_PLACES=876, PETRI_TRANSITIONS=1517} [2021-11-13 18:27:03,248 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 797 predicate places. [2021-11-13 18:27:03,248 INFO L470 AbstractCegarLoop]: Abstraction has has 876 places, 1517 transitions, 46269 flow [2021-11-13 18:27:03,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.630434782608695) internal successors, (2467), 46 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:03,248 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:27:03,249 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:03,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:27:03,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-13 18:27:03,449 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:27:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:03,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1975055887, now seen corresponding path program 19 times [2021-11-13 18:27:03,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:03,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669513792] [2021-11-13 18:27:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:03,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:03,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:03,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669513792] [2021-11-13 18:27:03,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669513792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:27:03,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290654242] [2021-11-13 18:27:03,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:27:03,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:27:03,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:27:03,843 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:27:03,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 18:27:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:03,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:27:03,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:04,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:27:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:05,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290654242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:27:05,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:27:05,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-13 18:27:05,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213503999] [2021-11-13 18:27:05,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:27:05,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 18:27:05,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 18:27:05,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:27:05,991 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:27:05,993 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 876 places, 1517 transitions, 46269 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:05,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:27:05,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:27:05,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:27:20,435 INFO L129 PetriNetUnfolder]: 1683/5848 cut-off events. [2021-11-13 18:27:20,435 INFO L130 PetriNetUnfolder]: For 279726/279736 co-relation queries the response was YES. [2021-11-13 18:27:20,579 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58023 conditions, 5848 events. 1683/5848 cut-off events. For 279726/279736 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 60670 event pairs, 95 based on Foata normal form. 8/5836 useless extension candidates. Maximal degree in co-relation 57847. Up to 721 conditions per place. [2021-11-13 18:27:20,625 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 676 selfloop transitions, 1236 changer transitions 14/1969 dead transitions. [2021-11-13 18:27:20,625 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1007 places, 1969 transitions, 61246 flow [2021-11-13 18:27:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-11-13 18:27:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-11-13 18:27:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 7737 transitions. [2021-11-13 18:27:20,636 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6299462628236444 [2021-11-13 18:27:20,637 INFO L72 ComplementDD]: Start complementDD. Operand 138 states and 7737 transitions. [2021-11-13 18:27:20,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 7737 transitions. [2021-11-13 18:27:20,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:27:20,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 138 states and 7737 transitions. [2021-11-13 18:27:20,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 139 states, 138 states have (on average 56.06521739130435) internal successors, (7737), 138 states have internal predecessors, (7737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:20,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 139 states, 139 states have (on average 89.0) internal successors, (12371), 139 states have internal predecessors, (12371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:20,659 INFO L81 ComplementDD]: Finished complementDD. Result has 139 states, 139 states have (on average 89.0) internal successors, (12371), 139 states have internal predecessors, (12371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:20,659 INFO L186 Difference]: Start difference. First operand has 876 places, 1517 transitions, 46269 flow. Second operand 138 states and 7737 transitions. [2021-11-13 18:27:20,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1007 places, 1969 transitions, 61246 flow [2021-11-13 18:27:23,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 963 places, 1969 transitions, 59698 flow, removed 149 selfloop flow, removed 44 redundant places. [2021-11-13 18:27:23,661 INFO L242 Difference]: Finished difference. Result has 991 places, 1682 transitions, 53411 flow [2021-11-13 18:27:23,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=45021, PETRI_DIFFERENCE_MINUEND_PLACES=826, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=138, PETRI_FLOW=53411, PETRI_PLACES=991, PETRI_TRANSITIONS=1682} [2021-11-13 18:27:23,663 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 912 predicate places. [2021-11-13 18:27:23,663 INFO L470 AbstractCegarLoop]: Abstraction has has 991 places, 1682 transitions, 53411 flow [2021-11-13 18:27:23,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:23,664 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:27:23,664 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:23,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 18:27:23,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:27:23,865 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:27:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:23,865 INFO L85 PathProgramCache]: Analyzing trace with hash -955948415, now seen corresponding path program 20 times [2021-11-13 18:27:23,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:23,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545828419] [2021-11-13 18:27:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:23,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:24,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:24,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545828419] [2021-11-13 18:27:24,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545828419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:27:24,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570672771] [2021-11-13 18:27:24,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:27:24,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:27:24,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:27:24,191 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:27:24,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-13 18:27:24,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:27:24,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:27:24,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:27:24,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:25,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:27:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:26,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570672771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:27:26,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:27:26,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-13 18:27:26,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108155816] [2021-11-13 18:27:26,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:27:26,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 18:27:26,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:26,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 18:27:26,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1848, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:27:26,130 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:27:26,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 991 places, 1682 transitions, 53411 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:26,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:27:26,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:27:26,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:27:37,330 INFO L129 PetriNetUnfolder]: 1859/6299 cut-off events. [2021-11-13 18:27:37,330 INFO L130 PetriNetUnfolder]: For 390679/390691 co-relation queries the response was YES. [2021-11-13 18:27:37,542 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67517 conditions, 6299 events. 1859/6299 cut-off events. For 390679/390691 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 65849 event pairs, 125 based on Foata normal form. 8/6280 useless extension candidates. Maximal degree in co-relation 67319. Up to 1093 conditions per place. [2021-11-13 18:27:37,592 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 570 selfloop transitions, 1362 changer transitions 12/1987 dead transitions. [2021-11-13 18:27:37,592 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1091 places, 1987 transitions, 66606 flow [2021-11-13 18:27:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-13 18:27:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-11-13 18:27:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 5929 transitions. [2021-11-13 18:27:37,600 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6225979208232699 [2021-11-13 18:27:37,600 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 5929 transitions. [2021-11-13 18:27:37,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 5929 transitions. [2021-11-13 18:27:37,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:27:37,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 5929 transitions. [2021-11-13 18:27:37,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 55.41121495327103) internal successors, (5929), 107 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:37,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:37,624 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 89.0) internal successors, (9612), 108 states have internal predecessors, (9612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:37,624 INFO L186 Difference]: Start difference. First operand has 991 places, 1682 transitions, 53411 flow. Second operand 107 states and 5929 transitions. [2021-11-13 18:27:37,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1091 places, 1987 transitions, 66606 flow [2021-11-13 18:27:41,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1033 places, 1987 transitions, 64576 flow, removed 306 selfloop flow, removed 58 redundant places. [2021-11-13 18:27:41,631 INFO L242 Difference]: Finished difference. Result has 1054 places, 1860 transitions, 61645 flow [2021-11-13 18:27:41,634 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=51545, PETRI_DIFFERENCE_MINUEND_PLACES=927, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=61645, PETRI_PLACES=1054, PETRI_TRANSITIONS=1860} [2021-11-13 18:27:41,635 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 975 predicate places. [2021-11-13 18:27:41,635 INFO L470 AbstractCegarLoop]: Abstraction has has 1054 places, 1860 transitions, 61645 flow [2021-11-13 18:27:41,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:41,636 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:27:41,636 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:41,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-13 18:27:41,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-13 18:27:41,851 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:27:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:41,851 INFO L85 PathProgramCache]: Analyzing trace with hash -352701545, now seen corresponding path program 21 times [2021-11-13 18:27:41,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:41,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880115828] [2021-11-13 18:27:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:41,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:42,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:42,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880115828] [2021-11-13 18:27:42,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880115828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:27:42,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884862154] [2021-11-13 18:27:42,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:27:42,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:27:42,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:27:42,176 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:27:42,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-13 18:27:42,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:27:42,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:27:42,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:27:42,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:43,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:27:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:44,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884862154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:27:44,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:27:44,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-13 18:27:44,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599086941] [2021-11-13 18:27:44,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:27:44,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 18:27:44,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:44,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 18:27:44,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:27:44,010 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:27:44,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1054 places, 1860 transitions, 61645 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:44,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:27:44,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:27:44,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:27:58,176 INFO L129 PetriNetUnfolder]: 2076/7127 cut-off events. [2021-11-13 18:27:58,176 INFO L130 PetriNetUnfolder]: For 465921/465931 co-relation queries the response was YES. [2021-11-13 18:27:58,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78306 conditions, 7127 events. 2076/7127 cut-off events. For 465921/465931 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 76670 event pairs, 133 based on Foata normal form. 7/7107 useless extension candidates. Maximal degree in co-relation 78095. Up to 899 conditions per place. [2021-11-13 18:27:58,345 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 604 selfloop transitions, 1629 changer transitions 12/2288 dead transitions. [2021-11-13 18:27:58,345 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1193 places, 2288 transitions, 79392 flow [2021-11-13 18:27:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-11-13 18:27:58,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-11-13 18:27:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 8120 transitions. [2021-11-13 18:27:58,354 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.624903801754656 [2021-11-13 18:27:58,355 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 8120 transitions. [2021-11-13 18:27:58,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 8120 transitions. [2021-11-13 18:27:58,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:27:58,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 8120 transitions. [2021-11-13 18:27:58,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 55.61643835616438) internal successors, (8120), 146 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:58,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 89.0) internal successors, (13083), 147 states have internal predecessors, (13083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:58,379 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 89.0) internal successors, (13083), 147 states have internal predecessors, (13083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:58,379 INFO L186 Difference]: Start difference. First operand has 1054 places, 1860 transitions, 61645 flow. Second operand 146 states and 8120 transitions. [2021-11-13 18:27:58,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1193 places, 2288 transitions, 79392 flow [2021-11-13 18:28:02,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1155 places, 2288 transitions, 75527 flow, removed 102 selfloop flow, removed 38 redundant places. [2021-11-13 18:28:02,079 INFO L242 Difference]: Finished difference. Result has 1182 places, 2095 transitions, 71264 flow [2021-11-13 18:28:02,080 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=58377, PETRI_DIFFERENCE_MINUEND_PLACES=1010, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=71264, PETRI_PLACES=1182, PETRI_TRANSITIONS=2095} [2021-11-13 18:28:02,081 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1103 predicate places. [2021-11-13 18:28:02,081 INFO L470 AbstractCegarLoop]: Abstraction has has 1182 places, 2095 transitions, 71264 flow [2021-11-13 18:28:02,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:02,082 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:28:02,082 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:02,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:02,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 18:28:02,292 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:28:02,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:02,292 INFO L85 PathProgramCache]: Analyzing trace with hash -276883775, now seen corresponding path program 22 times [2021-11-13 18:28:02,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:28:02,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899913721] [2021-11-13 18:28:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:02,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:28:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:02,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:28:02,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899913721] [2021-11-13 18:28:02,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899913721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:28:02,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253117294] [2021-11-13 18:28:02,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:28:02,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:28:02,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:28:02,595 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:28:02,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 18:28:02,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:28:02,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:28:02,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:28:02,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:03,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:04,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253117294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:28:04,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:28:04,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-13 18:28:04,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82794064] [2021-11-13 18:28:04,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:28:04,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 18:28:04,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:28:04,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 18:28:04,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1864, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:28:04,056 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:28:04,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1182 places, 2095 transitions, 71264 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:04,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:28:04,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:28:04,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:28:21,147 INFO L129 PetriNetUnfolder]: 2167/7445 cut-off events. [2021-11-13 18:28:21,147 INFO L130 PetriNetUnfolder]: For 511254/511264 co-relation queries the response was YES. [2021-11-13 18:28:21,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82717 conditions, 7445 events. 2167/7445 cut-off events. For 511254/511264 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 80762 event pairs, 108 based on Foata normal form. 7/7426 useless extension candidates. Maximal degree in co-relation 82490. Up to 878 conditions per place. [2021-11-13 18:28:21,328 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 486 selfloop transitions, 1880 changer transitions 12/2421 dead transitions. [2021-11-13 18:28:21,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1369 places, 2421 transitions, 84116 flow [2021-11-13 18:28:21,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-11-13 18:28:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2021-11-13 18:28:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 10749 transitions. [2021-11-13 18:28:21,345 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6225529943241052 [2021-11-13 18:28:21,345 INFO L72 ComplementDD]: Start complementDD. Operand 194 states and 10749 transitions. [2021-11-13 18:28:21,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 194 states and 10749 transitions. [2021-11-13 18:28:21,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:28:21,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 194 states and 10749 transitions. [2021-11-13 18:28:21,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 195 states, 194 states have (on average 55.40721649484536) internal successors, (10749), 194 states have internal predecessors, (10749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:21,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 195 states, 195 states have (on average 89.0) internal successors, (17355), 195 states have internal predecessors, (17355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:21,365 INFO L81 ComplementDD]: Finished complementDD. Result has 195 states, 195 states have (on average 89.0) internal successors, (17355), 195 states have internal predecessors, (17355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:21,366 INFO L186 Difference]: Start difference. First operand has 1182 places, 2095 transitions, 71264 flow. Second operand 194 states and 10749 transitions. [2021-11-13 18:28:21,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1369 places, 2421 transitions, 84116 flow [2021-11-13 18:28:25,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1314 places, 2421 transitions, 81842 flow, removed 374 selfloop flow, removed 55 redundant places. [2021-11-13 18:28:25,931 INFO L242 Difference]: Finished difference. Result has 1339 places, 2231 transitions, 77919 flow [2021-11-13 18:28:25,933 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=69122, PETRI_DIFFERENCE_MINUEND_PLACES=1121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2095, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1754, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=194, PETRI_FLOW=77919, PETRI_PLACES=1339, PETRI_TRANSITIONS=2231} [2021-11-13 18:28:25,933 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1260 predicate places. [2021-11-13 18:28:25,933 INFO L470 AbstractCegarLoop]: Abstraction has has 1339 places, 2231 transitions, 77919 flow [2021-11-13 18:28:25,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:25,934 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:28:25,934 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:25,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:26,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:28:26,135 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:28:26,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:26,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1746416369, now seen corresponding path program 23 times [2021-11-13 18:28:26,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:28:26,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765717125] [2021-11-13 18:28:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:26,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:28:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:26,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:28:26,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765717125] [2021-11-13 18:28:26,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765717125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:28:26,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754970631] [2021-11-13 18:28:26,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:28:26,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:28:26,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:28:26,408 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:28:26,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-13 18:28:26,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-13 18:28:26,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:28:26,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:28:26,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:27,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:28,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754970631] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:28:28,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:28:28,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-13 18:28:28,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221539665] [2021-11-13 18:28:28,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:28:28,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 18:28:28,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:28:28,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 18:28:28,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1864, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:28:28,076 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:28:28,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1339 places, 2231 transitions, 77919 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:28,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:28:28,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:28:28,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:28:51,698 INFO L129 PetriNetUnfolder]: 2344/8066 cut-off events. [2021-11-13 18:28:51,698 INFO L130 PetriNetUnfolder]: For 592163/592175 co-relation queries the response was YES. [2021-11-13 18:28:51,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92522 conditions, 8066 events. 2344/8066 cut-off events. For 592163/592175 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 88820 event pairs, 96 based on Foata normal form. 9/8061 useless extension candidates. Maximal degree in co-relation 92283. Up to 947 conditions per place. [2021-11-13 18:28:51,905 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 492 selfloop transitions, 2148 changer transitions 16/2699 dead transitions. [2021-11-13 18:28:51,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1579 places, 2699 transitions, 96166 flow [2021-11-13 18:28:51,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2021-11-13 18:28:51,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2021-11-13 18:28:51,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 13706 transitions. [2021-11-13 18:28:51,915 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6234817813765182 [2021-11-13 18:28:51,916 INFO L72 ComplementDD]: Start complementDD. Operand 247 states and 13706 transitions. [2021-11-13 18:28:51,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 247 states and 13706 transitions. [2021-11-13 18:28:51,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:28:51,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 247 states and 13706 transitions. [2021-11-13 18:28:51,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 248 states, 247 states have (on average 55.48987854251012) internal successors, (13706), 247 states have internal predecessors, (13706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:51,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 248 states, 248 states have (on average 89.0) internal successors, (22072), 248 states have internal predecessors, (22072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:51,957 INFO L81 ComplementDD]: Finished complementDD. Result has 248 states, 248 states have (on average 89.0) internal successors, (22072), 248 states have internal predecessors, (22072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:51,957 INFO L186 Difference]: Start difference. First operand has 1339 places, 2231 transitions, 77919 flow. Second operand 247 states and 13706 transitions. [2021-11-13 18:28:51,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1579 places, 2699 transitions, 96166 flow [2021-11-13 18:28:56,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1480 places, 2699 transitions, 93788 flow, removed 402 selfloop flow, removed 99 redundant places. [2021-11-13 18:28:57,043 INFO L242 Difference]: Finished difference. Result has 1511 places, 2439 transitions, 88716 flow [2021-11-13 18:28:57,045 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=75753, PETRI_DIFFERENCE_MINUEND_PLACES=1234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1947, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=247, PETRI_FLOW=88716, PETRI_PLACES=1511, PETRI_TRANSITIONS=2439} [2021-11-13 18:28:57,045 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1432 predicate places. [2021-11-13 18:28:57,045 INFO L470 AbstractCegarLoop]: Abstraction has has 1511 places, 2439 transitions, 88716 flow [2021-11-13 18:28:57,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:57,046 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:28:57,046 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:28:57,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-13 18:28:57,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-13 18:28:57,251 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:28:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:28:57,251 INFO L85 PathProgramCache]: Analyzing trace with hash 727733157, now seen corresponding path program 24 times [2021-11-13 18:28:57,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:28:57,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27570164] [2021-11-13 18:28:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:28:57,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:28:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:28:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:57,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:28:57,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27570164] [2021-11-13 18:28:57,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27570164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:28:57,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556330370] [2021-11-13 18:28:57,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:28:57,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:28:57,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:28:57,536 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:28:57,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-13 18:28:57,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-13 18:28:57,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:28:57,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:28:57,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:28:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:58,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:28:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:28:59,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556330370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:28:59,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:28:59,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-13 18:28:59,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591287882] [2021-11-13 18:28:59,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:28:59,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 18:28:59,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:28:59,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 18:28:59,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1864, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:28:59,152 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:28:59,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1511 places, 2439 transitions, 88716 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:28:59,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:28:59,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:28:59,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:29:19,293 INFO L129 PetriNetUnfolder]: 2925/9810 cut-off events. [2021-11-13 18:29:19,293 INFO L130 PetriNetUnfolder]: For 953728/953738 co-relation queries the response was YES. [2021-11-13 18:29:19,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123953 conditions, 9810 events. 2925/9810 cut-off events. For 953728/953738 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 111165 event pairs, 138 based on Foata normal form. 7/9806 useless extension candidates. Maximal degree in co-relation 123694. Up to 1200 conditions per place. [2021-11-13 18:29:19,628 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 742 selfloop transitions, 2469 changer transitions 12/3266 dead transitions. [2021-11-13 18:29:19,628 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1666 places, 3266 transitions, 125279 flow [2021-11-13 18:29:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-11-13 18:29:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-11-13 18:29:19,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 9054 transitions. [2021-11-13 18:29:19,634 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6279650436953808 [2021-11-13 18:29:19,634 INFO L72 ComplementDD]: Start complementDD. Operand 162 states and 9054 transitions. [2021-11-13 18:29:19,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 162 states and 9054 transitions. [2021-11-13 18:29:19,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:29:19,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 162 states and 9054 transitions. [2021-11-13 18:29:19,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 163 states, 162 states have (on average 55.888888888888886) internal successors, (9054), 162 states have internal predecessors, (9054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:29:19,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 163 states, 163 states have (on average 89.0) internal successors, (14507), 163 states have internal predecessors, (14507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:29:19,663 INFO L81 ComplementDD]: Finished complementDD. Result has 163 states, 163 states have (on average 89.0) internal successors, (14507), 163 states have internal predecessors, (14507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:29:19,663 INFO L186 Difference]: Start difference. First operand has 1511 places, 2439 transitions, 88716 flow. Second operand 162 states and 9054 transitions. [2021-11-13 18:29:19,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1666 places, 3266 transitions, 125279 flow [2021-11-13 18:29:29,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1519 places, 3266 transitions, 122362 flow, removed 534 selfloop flow, removed 147 redundant places. [2021-11-13 18:29:29,721 INFO L242 Difference]: Finished difference. Result has 1560 places, 3023 transitions, 117053 flow [2021-11-13 18:29:29,724 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=86017, PETRI_DIFFERENCE_MINUEND_PLACES=1358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1925, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=162, PETRI_FLOW=117053, PETRI_PLACES=1560, PETRI_TRANSITIONS=3023} [2021-11-13 18:29:29,725 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 1481 predicate places. [2021-11-13 18:29:29,726 INFO L470 AbstractCegarLoop]: Abstraction has has 1560 places, 3023 transitions, 117053 flow [2021-11-13 18:29:29,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:29:29,726 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:29:29,727 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:29:29,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-13 18:29:29,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:29:29,943 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-13 18:29:29,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:29:29,943 INFO L85 PathProgramCache]: Analyzing trace with hash -182425615, now seen corresponding path program 25 times [2021-11-13 18:29:29,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:29:29,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825853323] [2021-11-13 18:29:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:29:29,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:29:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:29:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:29:30,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:29:30,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825853323] [2021-11-13 18:29:30,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825853323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:29:30,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16300923] [2021-11-13 18:29:30,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:29:30,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:29:30,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:29:30,260 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:29:30,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b64dacb8-41b9-4535-9031-ccb2ff4b693f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-13 18:29:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:29:30,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:29:30,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:29:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:29:31,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:29:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:29:32,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16300923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:29:32,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:29:32,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2021-11-13 18:29:32,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447690585] [2021-11-13 18:29:32,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:29:32,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 18:29:32,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:29:32,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 18:29:32,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:29:32,042 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-11-13 18:29:32,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1560 places, 3023 transitions, 117053 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:29:32,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:29:32,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-11-13 18:29:32,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand