./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0 --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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:16:28,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:16:28,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:16:28,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:16:28,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:16:28,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:16:28,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:16:28,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:16:28,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:16:28,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:16:28,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:16:28,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:16:28,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:16:28,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:16:28,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:16:28,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:16:28,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:16:28,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:16:28,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:16:28,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:16:28,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:16:28,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:16:28,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:16:28,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:16:28,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:16:28,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:16:28,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:16:28,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:16:28,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:16:28,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:16:28,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:16:28,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:16:28,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:16:28,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:16:28,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:16:28,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:16:28,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:16:28,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:16:28,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:16:28,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:16:28,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:16:28,263 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 16:16:28,322 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:16:28,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:16:28,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:16:28,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:16:28,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:16:28,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:16:28,327 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:16:28,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:16:28,327 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:16:28,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:16:28,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:16:28,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:16:28,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 16:16:28,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:16:28,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 16:16:28,330 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:16:28,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:16:28,331 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:16:28,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 16:16:28,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:16:28,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:16:28,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:16:28,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:16:28,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:16:28,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:16:28,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 16:16:28,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:16:28,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:16:28,334 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 16:16:28,334 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 16:16:28,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 16:16:28,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:16:28,336 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_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c [2021-11-22 16:16:28,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:16:28,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:16:28,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:16:28,766 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:16:28,767 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:16:28,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2021-11-22 16:16:28,847 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/data/70f937df3/72590bf483fa45c99399684d0f552b0b/FLAGeb671e4cb [2021-11-22 16:16:29,412 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:16:29,413 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2021-11-22 16:16:29,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/data/70f937df3/72590bf483fa45c99399684d0f552b0b/FLAGeb671e4cb [2021-11-22 16:16:29,729 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/data/70f937df3/72590bf483fa45c99399684d0f552b0b [2021-11-22 16:16:29,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:16:29,739 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:16:29,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:16:29,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:16:29,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:16:29,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:16:29" (1/1) ... [2021-11-22 16:16:29,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1b8db9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:29, skipping insertion in model container [2021-11-22 16:16:29,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:16:29" (1/1) ... [2021-11-22 16:16:29,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:16:29,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:16:30,164 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2021-11-22 16:16:30,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:16:30,208 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:16:30,260 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2021-11-22 16:16:30,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:16:30,298 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:16:30,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:30 WrapperNode [2021-11-22 16:16:30,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:16:30,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:16:30,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:16:30,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:16:30,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:30" (1/1) ... [2021-11-22 16:16:30,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:30" (1/1) ... [2021-11-22 16:16:30,379 INFO L137 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2021-11-22 16:16:30,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:16:30,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:16:30,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:16:30,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:16:30,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:30" (1/1) ... [2021-11-22 16:16:30,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:30" (1/1) ... [2021-11-22 16:16:30,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:30" (1/1) ... [2021-11-22 16:16:30,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:30" (1/1) ... [2021-11-22 16:16:30,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:30" (1/1) ... [2021-11-22 16:16:30,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:30" (1/1) ... [2021-11-22 16:16:30,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:30" (1/1) ... [2021-11-22 16:16:30,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:16:30,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:16:30,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:16:30,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:16:30,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:30" (1/1) ... [2021-11-22 16:16:30,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:16:30,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:30,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:16:30,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:16:30,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:16:30,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-22 16:16:30,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-22 16:16:30,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-22 16:16:30,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-22 16:16:30,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-22 16:16:30,572 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-22 16:16:30,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:16:30,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 16:16:30,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 16:16:30,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-22 16:16:30,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-22 16:16:30,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 16:16:30,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:16:30,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:16:30,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 16:16:30,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 16:16:30,576 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-22 16:16:30,717 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:16:30,719 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:16:31,109 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:16:31,204 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:16:31,204 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-22 16:16:31,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:16:31 BoogieIcfgContainer [2021-11-22 16:16:31,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:16:31,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:16:31,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:16:31,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:16:31,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:16:29" (1/3) ... [2021-11-22 16:16:31,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f262adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:16:31, skipping insertion in model container [2021-11-22 16:16:31,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:30" (2/3) ... [2021-11-22 16:16:31,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f262adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:16:31, skipping insertion in model container [2021-11-22 16:16:31,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:16:31" (3/3) ... [2021-11-22 16:16:31,218 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2021-11-22 16:16:31,225 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-22 16:16:31,225 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:16:31,225 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 16:16:31,225 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-22 16:16:31,268 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,268 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,269 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,269 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,269 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,270 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,270 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,271 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,271 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,272 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,272 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,272 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,272 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,273 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,273 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,273 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,274 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,274 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,274 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,274 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,274 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,275 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,275 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,276 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,276 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,276 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,276 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,277 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,277 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,277 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,278 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,278 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,278 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,278 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,279 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,279 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,291 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,291 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,291 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,292 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,292 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,292 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,293 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,293 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,293 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,293 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,294 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,294 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,294 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,294 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,295 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,295 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,296 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,296 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,296 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,296 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,297 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,297 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,297 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,297 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,298 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,298 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,298 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,298 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,299 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,299 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,299 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,300 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,300 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,300 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,300 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,301 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,301 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,301 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,302 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,302 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,302 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,302 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,306 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,307 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,307 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,307 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,307 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,308 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,309 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,309 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,309 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,310 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,310 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,310 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,321 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 16:16:31,331 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-22 16:16:31,433 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:16:31,442 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 [2021-11-22 16:16:31,443 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-22 16:16:31,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 159 transitions, 342 flow [2021-11-22 16:16:31,559 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2021-11-22 16:16:31,559 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-22 16:16:31,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 156 events. 13/156 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 96 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2021-11-22 16:16:31,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 159 transitions, 342 flow [2021-11-22 16:16:31,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 145 transitions, 308 flow [2021-11-22 16:16:31,694 INFO L129 PetriNetUnfolder]: 13/144 cut-off events. [2021-11-22 16:16:31,695 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-22 16:16:31,695 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:16:31,696 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:31,697 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:16:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:31,704 INFO L85 PathProgramCache]: Analyzing trace with hash -363023648, now seen corresponding path program 1 times [2021-11-22 16:16:31,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:31,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870710233] [2021-11-22 16:16:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:31,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:32,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:32,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870710233] [2021-11-22 16:16:32,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870710233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:32,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:32,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:16:32,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213294311] [2021-11-22 16:16:32,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:32,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 16:16:32,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:32,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 16:16:32,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 16:16:32,162 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 159 [2021-11-22 16:16:32,173 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 145 transitions, 308 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:32,173 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:16:32,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 159 [2021-11-22 16:16:32,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:16:32,362 INFO L129 PetriNetUnfolder]: 42/270 cut-off events. [2021-11-22 16:16:32,363 INFO L130 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2021-11-22 16:16:32,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 270 events. 42/270 cut-off events. For 50/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 719 event pairs, 15 based on Foata normal form. 42/281 useless extension candidates. Maximal degree in co-relation 216. Up to 59 conditions per place. [2021-11-22 16:16:32,375 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 9 selfloop transitions, 0 changer transitions 4/137 dead transitions. [2021-11-22 16:16:32,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 137 transitions, 310 flow [2021-11-22 16:16:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 16:16:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-22 16:16:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 299 transitions. [2021-11-22 16:16:32,405 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.940251572327044 [2021-11-22 16:16:32,406 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 299 transitions. [2021-11-22 16:16:32,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 299 transitions. [2021-11-22 16:16:32,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:16:32,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 299 transitions. [2021-11-22 16:16:32,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 149.5) internal successors, (299), 2 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:32,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:32,439 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:32,441 INFO L186 Difference]: Start difference. First operand has 142 places, 145 transitions, 308 flow. Second operand 2 states and 299 transitions. [2021-11-22 16:16:32,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 137 transitions, 310 flow [2021-11-22 16:16:32,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 137 transitions, 298 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-11-22 16:16:32,451 INFO L242 Difference]: Finished difference. Result has 137 places, 133 transitions, 272 flow [2021-11-22 16:16:32,458 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=272, PETRI_PLACES=137, PETRI_TRANSITIONS=133} [2021-11-22 16:16:32,464 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, -5 predicate places. [2021-11-22 16:16:32,465 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 133 transitions, 272 flow [2021-11-22 16:16:32,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:32,466 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:16:32,466 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:32,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:16:32,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:16:32,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:32,469 INFO L85 PathProgramCache]: Analyzing trace with hash 811959335, now seen corresponding path program 1 times [2021-11-22 16:16:32,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:32,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422825659] [2021-11-22 16:16:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:32,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:32,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:32,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422825659] [2021-11-22 16:16:32,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422825659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:32,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:32,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 16:16:32,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992566230] [2021-11-22 16:16:32,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:32,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:16:32,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:16:32,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:16:32,933 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 159 [2021-11-22 16:16:32,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 133 transitions, 272 flow. Second operand has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:32,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:16:32,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 159 [2021-11-22 16:16:32,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:16:33,231 INFO L129 PetriNetUnfolder]: 50/349 cut-off events. [2021-11-22 16:16:33,234 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2021-11-22 16:16:33,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 349 events. 50/349 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1157 event pairs, 4 based on Foata normal form. 2/323 useless extension candidates. Maximal degree in co-relation 478. Up to 51 conditions per place. [2021-11-22 16:16:33,238 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 59 selfloop transitions, 5 changer transitions 5/169 dead transitions. [2021-11-22 16:16:33,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 169 transitions, 491 flow [2021-11-22 16:16:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:16:33,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-22 16:16:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 861 transitions. [2021-11-22 16:16:33,245 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7735849056603774 [2021-11-22 16:16:33,245 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 861 transitions. [2021-11-22 16:16:33,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 861 transitions. [2021-11-22 16:16:33,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:16:33,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 861 transitions. [2021-11-22 16:16:33,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.0) internal successors, (861), 7 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:33,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:33,260 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:33,260 INFO L186 Difference]: Start difference. First operand has 137 places, 133 transitions, 272 flow. Second operand 7 states and 861 transitions. [2021-11-22 16:16:33,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 169 transitions, 491 flow [2021-11-22 16:16:33,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 169 transitions, 491 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-22 16:16:33,268 INFO L242 Difference]: Finished difference. Result has 143 places, 136 transitions, 303 flow [2021-11-22 16:16:33,269 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=143, PETRI_TRANSITIONS=136} [2021-11-22 16:16:33,270 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 1 predicate places. [2021-11-22 16:16:33,271 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 136 transitions, 303 flow [2021-11-22 16:16:33,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 117.0) internal successors, (819), 7 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:33,273 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:16:33,273 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:33,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 16:16:33,274 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:16:33,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:33,275 INFO L85 PathProgramCache]: Analyzing trace with hash 413321701, now seen corresponding path program 1 times [2021-11-22 16:16:33,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:33,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611676002] [2021-11-22 16:16:33,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:33,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:33,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:33,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611676002] [2021-11-22 16:16:33,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611676002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:33,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:33,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:16:33,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932976871] [2021-11-22 16:16:33,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:33,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:16:33,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:33,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:16:33,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:16:33,521 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 159 [2021-11-22 16:16:33,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 136 transitions, 303 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:33,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:16:33,524 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 159 [2021-11-22 16:16:33,524 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:16:33,694 INFO L129 PetriNetUnfolder]: 57/392 cut-off events. [2021-11-22 16:16:33,694 INFO L130 PetriNetUnfolder]: For 56/57 co-relation queries the response was YES. [2021-11-22 16:16:33,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 392 events. 57/392 cut-off events. For 56/57 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1413 event pairs, 6 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 570. Up to 59 conditions per place. [2021-11-22 16:16:33,700 INFO L132 encePairwiseOnDemand]: 154/159 looper letters, 32 selfloop transitions, 7 changer transitions 0/157 dead transitions. [2021-11-22 16:16:33,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 157 transitions, 448 flow [2021-11-22 16:16:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:16:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-22 16:16:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 575 transitions. [2021-11-22 16:16:33,704 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9040880503144654 [2021-11-22 16:16:33,704 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 575 transitions. [2021-11-22 16:16:33,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 575 transitions. [2021-11-22 16:16:33,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:16:33,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 575 transitions. [2021-11-22 16:16:33,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:33,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:33,712 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:33,713 INFO L186 Difference]: Start difference. First operand has 143 places, 136 transitions, 303 flow. Second operand 4 states and 575 transitions. [2021-11-22 16:16:33,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 157 transitions, 448 flow [2021-11-22 16:16:33,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 157 transitions, 442 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-11-22 16:16:33,725 INFO L242 Difference]: Finished difference. Result has 141 places, 140 transitions, 336 flow [2021-11-22 16:16:33,726 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=141, PETRI_TRANSITIONS=140} [2021-11-22 16:16:33,729 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, -1 predicate places. [2021-11-22 16:16:33,730 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 140 transitions, 336 flow [2021-11-22 16:16:33,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:33,731 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:16:33,732 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:33,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 16:16:33,733 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:16:33,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:33,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1166406698, now seen corresponding path program 1 times [2021-11-22 16:16:33,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:33,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704415609] [2021-11-22 16:16:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:33,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:33,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:33,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704415609] [2021-11-22 16:16:33,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704415609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:33,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:33,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 16:16:33,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527563425] [2021-11-22 16:16:33,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:33,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:16:33,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:33,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:16:33,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:16:33,984 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 159 [2021-11-22 16:16:33,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 336 flow. Second operand has 7 states, 7 states have (on average 122.42857142857143) internal successors, (857), 7 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:33,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:16:33,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 159 [2021-11-22 16:16:33,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:16:34,575 INFO L129 PetriNetUnfolder]: 402/1388 cut-off events. [2021-11-22 16:16:34,576 INFO L130 PetriNetUnfolder]: For 598/598 co-relation queries the response was YES. [2021-11-22 16:16:34,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2663 conditions, 1388 events. 402/1388 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8997 event pairs, 159 based on Foata normal form. 0/1194 useless extension candidates. Maximal degree in co-relation 2656. Up to 473 conditions per place. [2021-11-22 16:16:34,595 INFO L132 encePairwiseOnDemand]: 150/159 looper letters, 60 selfloop transitions, 8 changer transitions 0/170 dead transitions. [2021-11-22 16:16:34,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 170 transitions, 580 flow [2021-11-22 16:16:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:16:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-22 16:16:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1008 transitions. [2021-11-22 16:16:34,601 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7924528301886793 [2021-11-22 16:16:34,601 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1008 transitions. [2021-11-22 16:16:34,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1008 transitions. [2021-11-22 16:16:34,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:16:34,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1008 transitions. [2021-11-22 16:16:34,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.0) internal successors, (1008), 8 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:34,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 159.0) internal successors, (1431), 9 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:34,616 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 159.0) internal successors, (1431), 9 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:34,617 INFO L186 Difference]: Start difference. First operand has 141 places, 140 transitions, 336 flow. Second operand 8 states and 1008 transitions. [2021-11-22 16:16:34,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 170 transitions, 580 flow [2021-11-22 16:16:34,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 170 transitions, 580 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-22 16:16:34,628 INFO L242 Difference]: Finished difference. Result has 151 places, 143 transitions, 372 flow [2021-11-22 16:16:34,629 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=372, PETRI_PLACES=151, PETRI_TRANSITIONS=143} [2021-11-22 16:16:34,631 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 9 predicate places. [2021-11-22 16:16:34,631 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 143 transitions, 372 flow [2021-11-22 16:16:34,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.42857142857143) internal successors, (857), 7 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:34,632 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:16:34,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:34,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 16:16:34,633 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:16:34,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash 804051908, now seen corresponding path program 1 times [2021-11-22 16:16:34,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:34,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592118862] [2021-11-22 16:16:34,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:34,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:34,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:34,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592118862] [2021-11-22 16:16:34,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592118862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:34,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:34,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-22 16:16:34,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166510015] [2021-11-22 16:16:34,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:34,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:16:34,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:34,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:16:34,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:16:34,924 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 159 [2021-11-22 16:16:34,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 143 transitions, 372 flow. Second operand has 10 states, 10 states have (on average 101.1) internal successors, (1011), 10 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:34,936 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:16:34,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 159 [2021-11-22 16:16:34,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:16:35,880 INFO L129 PetriNetUnfolder]: 1091/2485 cut-off events. [2021-11-22 16:16:35,895 INFO L130 PetriNetUnfolder]: For 670/694 co-relation queries the response was YES. [2021-11-22 16:16:35,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5035 conditions, 2485 events. 1091/2485 cut-off events. For 670/694 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17699 event pairs, 801 based on Foata normal form. 24/2211 useless extension candidates. Maximal degree in co-relation 5024. Up to 1499 conditions per place. [2021-11-22 16:16:35,931 INFO L132 encePairwiseOnDemand]: 147/159 looper letters, 80 selfloop transitions, 11 changer transitions 0/176 dead transitions. [2021-11-22 16:16:35,932 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 176 transitions, 638 flow [2021-11-22 16:16:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:16:35,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-22 16:16:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1150 transitions. [2021-11-22 16:16:35,939 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.657518582046884 [2021-11-22 16:16:35,939 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1150 transitions. [2021-11-22 16:16:35,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1150 transitions. [2021-11-22 16:16:35,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:16:35,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1150 transitions. [2021-11-22 16:16:35,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 104.54545454545455) internal successors, (1150), 11 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:35,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 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) [2021-11-22 16:16:35,955 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 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) [2021-11-22 16:16:35,955 INFO L186 Difference]: Start difference. First operand has 151 places, 143 transitions, 372 flow. Second operand 11 states and 1150 transitions. [2021-11-22 16:16:35,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 176 transitions, 638 flow [2021-11-22 16:16:35,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 176 transitions, 628 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-22 16:16:35,969 INFO L242 Difference]: Finished difference. Result has 162 places, 147 transitions, 411 flow [2021-11-22 16:16:35,969 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=411, PETRI_PLACES=162, PETRI_TRANSITIONS=147} [2021-11-22 16:16:35,973 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 20 predicate places. [2021-11-22 16:16:35,974 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 147 transitions, 411 flow [2021-11-22 16:16:35,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.1) internal successors, (1011), 10 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:35,975 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:16:35,975 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:35,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 16:16:35,976 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:16:35,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:35,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1872440416, now seen corresponding path program 1 times [2021-11-22 16:16:35,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:35,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58832917] [2021-11-22 16:16:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:35,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:36,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:36,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58832917] [2021-11-22 16:16:36,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58832917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:36,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:36,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 16:16:36,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985775611] [2021-11-22 16:16:36,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:36,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 16:16:36,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:36,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 16:16:36,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:16:36,405 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 159 [2021-11-22 16:16:36,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 147 transitions, 411 flow. Second operand has 9 states, 9 states have (on average 102.44444444444444) internal successors, (922), 9 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:36,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:16:36,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 159 [2021-11-22 16:16:36,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:16:37,083 INFO L129 PetriNetUnfolder]: 883/1825 cut-off events. [2021-11-22 16:16:37,084 INFO L130 PetriNetUnfolder]: For 852/852 co-relation queries the response was YES. [2021-11-22 16:16:37,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4141 conditions, 1825 events. 883/1825 cut-off events. For 852/852 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11900 event pairs, 524 based on Foata normal form. 1/1683 useless extension candidates. Maximal degree in co-relation 4125. Up to 1103 conditions per place. [2021-11-22 16:16:37,111 INFO L132 encePairwiseOnDemand]: 148/159 looper letters, 66 selfloop transitions, 7 changer transitions 4/162 dead transitions. [2021-11-22 16:16:37,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 162 transitions, 620 flow [2021-11-22 16:16:37,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:16:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-22 16:16:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 947 transitions. [2021-11-22 16:16:37,117 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6617749825296995 [2021-11-22 16:16:37,117 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 947 transitions. [2021-11-22 16:16:37,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 947 transitions. [2021-11-22 16:16:37,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:16:37,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 947 transitions. [2021-11-22 16:16:37,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 105.22222222222223) internal successors, (947), 9 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:37,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 159.0) internal successors, (1590), 10 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:37,128 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 159.0) internal successors, (1590), 10 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:37,129 INFO L186 Difference]: Start difference. First operand has 162 places, 147 transitions, 411 flow. Second operand 9 states and 947 transitions. [2021-11-22 16:16:37,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 162 transitions, 620 flow [2021-11-22 16:16:37,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 162 transitions, 594 flow, removed 6 selfloop flow, removed 9 redundant places. [2021-11-22 16:16:37,138 INFO L242 Difference]: Finished difference. Result has 158 places, 141 transitions, 366 flow [2021-11-22 16:16:37,139 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=366, PETRI_PLACES=158, PETRI_TRANSITIONS=141} [2021-11-22 16:16:37,142 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 16 predicate places. [2021-11-22 16:16:37,142 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 141 transitions, 366 flow [2021-11-22 16:16:37,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 102.44444444444444) internal successors, (922), 9 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:37,143 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:16:37,144 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:37,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 16:16:37,144 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:16:37,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash 2121674799, now seen corresponding path program 1 times [2021-11-22 16:16:37,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:37,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655785572] [2021-11-22 16:16:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:37,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:37,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655785572] [2021-11-22 16:16:37,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655785572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:37,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151723257] [2021-11-22 16:16:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:37,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:37,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:37,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:37,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:16:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:37,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 16:16:37,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:37,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:38,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151723257] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:38,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:16:38,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2021-11-22 16:16:38,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667208073] [2021-11-22 16:16:38,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:38,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 16:16:38,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:38,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 16:16:38,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-22 16:16:38,426 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 159 [2021-11-22 16:16:38,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 141 transitions, 366 flow. Second operand has 9 states, 9 states have (on average 115.33333333333333) internal successors, (1038), 9 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:38,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:16:38,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 159 [2021-11-22 16:16:38,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:16:39,397 INFO L129 PetriNetUnfolder]: 1525/3010 cut-off events. [2021-11-22 16:16:39,397 INFO L130 PetriNetUnfolder]: For 849/849 co-relation queries the response was YES. [2021-11-22 16:16:39,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6305 conditions, 3010 events. 1525/3010 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21127 event pairs, 418 based on Foata normal form. 10/2630 useless extension candidates. Maximal degree in co-relation 6293. Up to 691 conditions per place. [2021-11-22 16:16:39,438 INFO L132 encePairwiseOnDemand]: 148/159 looper letters, 97 selfloop transitions, 17 changer transitions 0/209 dead transitions. [2021-11-22 16:16:39,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 209 transitions, 810 flow [2021-11-22 16:16:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:16:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-22 16:16:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1327 transitions. [2021-11-22 16:16:39,448 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7587192681532304 [2021-11-22 16:16:39,448 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1327 transitions. [2021-11-22 16:16:39,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1327 transitions. [2021-11-22 16:16:39,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:16:39,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1327 transitions. [2021-11-22 16:16:39,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 120.63636363636364) internal successors, (1327), 11 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:39,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 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) [2021-11-22 16:16:39,466 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 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) [2021-11-22 16:16:39,466 INFO L186 Difference]: Start difference. First operand has 158 places, 141 transitions, 366 flow. Second operand 11 states and 1327 transitions. [2021-11-22 16:16:39,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 209 transitions, 810 flow [2021-11-22 16:16:39,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 209 transitions, 789 flow, removed 3 selfloop flow, removed 8 redundant places. [2021-11-22 16:16:39,484 INFO L242 Difference]: Finished difference. Result has 159 places, 153 transitions, 441 flow [2021-11-22 16:16:39,485 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=441, PETRI_PLACES=159, PETRI_TRANSITIONS=153} [2021-11-22 16:16:39,486 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 17 predicate places. [2021-11-22 16:16:39,486 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 153 transitions, 441 flow [2021-11-22 16:16:39,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 115.33333333333333) internal successors, (1038), 9 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:39,488 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:16:39,488 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:39,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:39,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:39,704 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:16:39,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:39,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2126876587, now seen corresponding path program 2 times [2021-11-22 16:16:39,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:39,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187910068] [2021-11-22 16:16:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:39,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:39,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:39,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187910068] [2021-11-22 16:16:39,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187910068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:39,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028022306] [2021-11-22 16:16:39,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:16:39,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:39,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:39,915 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:39,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:16:40,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-22 16:16:40,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:16:40,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 16:16:40,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:16:40,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:16:40,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028022306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:40,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 16:16:40,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-22 16:16:40,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165475274] [2021-11-22 16:16:40,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:40,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:16:40,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:40,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:16:40,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:16:40,681 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 159 [2021-11-22 16:16:40,683 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 153 transitions, 441 flow. Second operand has 6 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:40,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:16:40,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 159 [2021-11-22 16:16:40,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:16:41,456 INFO L129 PetriNetUnfolder]: 1053/2268 cut-off events. [2021-11-22 16:16:41,456 INFO L130 PetriNetUnfolder]: For 1431/1476 co-relation queries the response was YES. [2021-11-22 16:16:41,468 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5545 conditions, 2268 events. 1053/2268 cut-off events. For 1431/1476 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15572 event pairs, 310 based on Foata normal form. 89/2168 useless extension candidates. Maximal degree in co-relation 5531. Up to 956 conditions per place. [2021-11-22 16:16:41,493 INFO L132 encePairwiseOnDemand]: 150/159 looper letters, 59 selfloop transitions, 13 changer transitions 0/171 dead transitions. [2021-11-22 16:16:41,494 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 171 transitions, 672 flow [2021-11-22 16:16:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:16:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-22 16:16:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 905 transitions. [2021-11-22 16:16:41,499 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7114779874213837 [2021-11-22 16:16:41,499 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 905 transitions. [2021-11-22 16:16:41,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 905 transitions. [2021-11-22 16:16:41,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:16:41,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 905 transitions. [2021-11-22 16:16:41,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.125) internal successors, (905), 8 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 159.0) internal successors, (1431), 9 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,510 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 159.0) internal successors, (1431), 9 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,510 INFO L186 Difference]: Start difference. First operand has 159 places, 153 transitions, 441 flow. Second operand 8 states and 905 transitions. [2021-11-22 16:16:41,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 171 transitions, 672 flow [2021-11-22 16:16:41,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 171 transitions, 665 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-11-22 16:16:41,525 INFO L242 Difference]: Finished difference. Result has 165 places, 156 transitions, 502 flow [2021-11-22 16:16:41,526 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=502, PETRI_PLACES=165, PETRI_TRANSITIONS=156} [2021-11-22 16:16:41,528 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 23 predicate places. [2021-11-22 16:16:41,529 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 156 transitions, 502 flow [2021-11-22 16:16:41,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,530 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:16:41,530 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:41,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:41,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-22 16:16:41,756 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:16:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:41,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2043651221, now seen corresponding path program 1 times [2021-11-22 16:16:41,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:41,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367837785] [2021-11-22 16:16:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:41,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:41,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:41,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367837785] [2021-11-22 16:16:41,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367837785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:41,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086842066] [2021-11-22 16:16:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:41,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:41,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:41,876 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:41,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:16:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:41,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:16:41,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:42,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:42,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086842066] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:42,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:16:42,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2021-11-22 16:16:42,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200473505] [2021-11-22 16:16:42,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:42,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:16:42,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:42,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:16:42,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:16:42,695 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 159 [2021-11-22 16:16:42,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 156 transitions, 502 flow. Second operand has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:42,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:16:42,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 159 [2021-11-22 16:16:42,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:16:43,098 INFO L129 PetriNetUnfolder]: 464/1132 cut-off events. [2021-11-22 16:16:43,098 INFO L130 PetriNetUnfolder]: For 1629/1792 co-relation queries the response was YES. [2021-11-22 16:16:43,105 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3122 conditions, 1132 events. 464/1132 cut-off events. For 1629/1792 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6436 event pairs, 106 based on Foata normal form. 82/1133 useless extension candidates. Maximal degree in co-relation 3106. Up to 395 conditions per place. [2021-11-22 16:16:43,115 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 57 selfloop transitions, 7 changer transitions 0/174 dead transitions. [2021-11-22 16:16:43,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 174 transitions, 742 flow [2021-11-22 16:16:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:16:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-22 16:16:43,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 873 transitions. [2021-11-22 16:16:43,120 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.784366576819407 [2021-11-22 16:16:43,121 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 873 transitions. [2021-11-22 16:16:43,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 873 transitions. [2021-11-22 16:16:43,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:16:43,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 873 transitions. [2021-11-22 16:16:43,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.71428571428571) internal successors, (873), 7 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:43,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:43,131 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:43,131 INFO L186 Difference]: Start difference. First operand has 165 places, 156 transitions, 502 flow. Second operand 7 states and 873 transitions. [2021-11-22 16:16:43,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 174 transitions, 742 flow [2021-11-22 16:16:43,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 174 transitions, 718 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-11-22 16:16:43,150 INFO L242 Difference]: Finished difference. Result has 168 places, 157 transitions, 510 flow [2021-11-22 16:16:43,151 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=510, PETRI_PLACES=168, PETRI_TRANSITIONS=157} [2021-11-22 16:16:43,152 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 26 predicate places. [2021-11-22 16:16:43,152 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 157 transitions, 510 flow [2021-11-22 16:16:43,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:43,153 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:16:43,154 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:43,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:43,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-22 16:16:43,368 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:16:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:43,369 INFO L85 PathProgramCache]: Analyzing trace with hash 729424688, now seen corresponding path program 1 times [2021-11-22 16:16:43,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:43,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448543890] [2021-11-22 16:16:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:43,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:44,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:44,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448543890] [2021-11-22 16:16:44,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448543890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:44,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365103598] [2021-11-22 16:16:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:44,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:44,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:44,840 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:44,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 16:16:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:44,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-22 16:16:44,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:45,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:16:45,252 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:16:45,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-22 16:16:46,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 16:16:46,212 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-22 16:16:46,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 14 [2021-11-22 16:16:46,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 16:16:47,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-22 16:16:48,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-22 16:16:48,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-22 16:16:49,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:16:49,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 43 [2021-11-22 16:16:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:51,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:58,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:17:58,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27531 treesize of output 27159 [2021-11-22 16:17:58,680 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-22 16:17:58,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-22 16:17:58,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-22 16:17:58,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910216203] [2021-11-22 16:17:58,681 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-22 16:17:58,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-22 16:17:58,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:17:58,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-22 16:17:58,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=4442, Unknown=16, NotChecked=0, Total=5402 [2021-11-22 16:17:58,691 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 159 [2021-11-22 16:17:58,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 157 transitions, 510 flow. Second operand has 30 states, 30 states have (on average 74.36666666666666) internal successors, (2231), 30 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:58,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:17:58,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 159 [2021-11-22 16:17:58,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:18:03,120 INFO L129 PetriNetUnfolder]: 2878/5876 cut-off events. [2021-11-22 16:18:03,121 INFO L130 PetriNetUnfolder]: For 6906/6938 co-relation queries the response was YES. [2021-11-22 16:18:03,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16530 conditions, 5876 events. 2878/5876 cut-off events. For 6906/6938 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 46387 event pairs, 341 based on Foata normal form. 3/5818 useless extension candidates. Maximal degree in co-relation 16512. Up to 1817 conditions per place. [2021-11-22 16:18:03,226 INFO L132 encePairwiseOnDemand]: 126/159 looper letters, 232 selfloop transitions, 89 changer transitions 5/390 dead transitions. [2021-11-22 16:18:03,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 390 transitions, 2223 flow [2021-11-22 16:18:03,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-22 16:18:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-22 16:18:03,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2941 transitions. [2021-11-22 16:18:03,242 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4999150093489716 [2021-11-22 16:18:03,242 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2941 transitions. [2021-11-22 16:18:03,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2941 transitions. [2021-11-22 16:18:03,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:18:03,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2941 transitions. [2021-11-22 16:18:03,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 79.48648648648648) internal successors, (2941), 37 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:18:03,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 159.0) internal successors, (6042), 38 states have internal predecessors, (6042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:18:03,277 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 159.0) internal successors, (6042), 38 states have internal predecessors, (6042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:18:03,278 INFO L186 Difference]: Start difference. First operand has 168 places, 157 transitions, 510 flow. Second operand 37 states and 2941 transitions. [2021-11-22 16:18:03,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 390 transitions, 2223 flow [2021-11-22 16:18:03,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 390 transitions, 2167 flow, removed 4 selfloop flow, removed 6 redundant places. [2021-11-22 16:18:03,323 INFO L242 Difference]: Finished difference. Result has 221 places, 232 transitions, 1314 flow [2021-11-22 16:18:03,325 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1314, PETRI_PLACES=221, PETRI_TRANSITIONS=232} [2021-11-22 16:18:03,326 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 79 predicate places. [2021-11-22 16:18:03,326 INFO L470 AbstractCegarLoop]: Abstraction has has 221 places, 232 transitions, 1314 flow [2021-11-22 16:18:03,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 74.36666666666666) internal successors, (2231), 30 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:18:03,328 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:18:03,328 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:18:03,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:18:03,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 16:18:03,544 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:18:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:18:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash 645464722, now seen corresponding path program 2 times [2021-11-22 16:18:03,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:18:03,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568120052] [2021-11-22 16:18:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:18:03,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:18:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:18:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:18:05,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:18:05,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568120052] [2021-11-22 16:18:05,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568120052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:18:05,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159315379] [2021-11-22 16:18:05,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:18:05,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:18:05,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:18:05,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:18:05,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 16:18:05,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:18:05,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:18:05,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-22 16:18:05,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:18:05,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:18:06,470 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 16:18:06,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-22 16:18:07,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 16:18:07,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-22 16:18:08,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-22 16:18:08,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-22 16:18:08,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:18:08,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 43 [2021-11-22 16:18:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:18:10,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:18:56,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:18:56,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27531 treesize of output 27159 [2021-11-22 16:18:57,086 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-22 16:18:57,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-22 16:18:57,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-22 16:18:57,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644943642] [2021-11-22 16:18:57,087 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-22 16:18:57,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-22 16:18:57,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:18:57,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-22 16:18:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=4734, Unknown=9, NotChecked=0, Total=5402 [2021-11-22 16:18:57,095 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2021-11-22 16:18:57,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 232 transitions, 1314 flow. Second operand has 32 states, 32 states have (on average 70.3125) internal successors, (2250), 32 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:18:57,100 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:18:57,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2021-11-22 16:18:57,100 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:19:04,143 INFO L129 PetriNetUnfolder]: 7962/13468 cut-off events. [2021-11-22 16:19:04,144 INFO L130 PetriNetUnfolder]: For 32300/32511 co-relation queries the response was YES. [2021-11-22 16:19:04,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46687 conditions, 13468 events. 7962/13468 cut-off events. For 32300/32511 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 104105 event pairs, 1097 based on Foata normal form. 146/13446 useless extension candidates. Maximal degree in co-relation 46648. Up to 4671 conditions per place. [2021-11-22 16:19:04,437 INFO L132 encePairwiseOnDemand]: 123/159 looper letters, 351 selfloop transitions, 181 changer transitions 5/595 dead transitions. [2021-11-22 16:19:04,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 595 transitions, 4489 flow [2021-11-22 16:19:04,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-22 16:19:04,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-11-22 16:19:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3741 transitions. [2021-11-22 16:19:04,447 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48016942626107045 [2021-11-22 16:19:04,447 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3741 transitions. [2021-11-22 16:19:04,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3741 transitions. [2021-11-22 16:19:04,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:19:04,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3741 transitions. [2021-11-22 16:19:04,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 76.34693877551021) internal successors, (3741), 49 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:04,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 159.0) internal successors, (7950), 50 states have internal predecessors, (7950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:04,476 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 159.0) internal successors, (7950), 50 states have internal predecessors, (7950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:04,476 INFO L186 Difference]: Start difference. First operand has 221 places, 232 transitions, 1314 flow. Second operand 49 states and 3741 transitions. [2021-11-22 16:19:04,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 595 transitions, 4489 flow [2021-11-22 16:19:04,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 595 transitions, 4223 flow, removed 62 selfloop flow, removed 15 redundant places. [2021-11-22 16:19:04,739 INFO L242 Difference]: Finished difference. Result has 273 places, 353 transitions, 2895 flow [2021-11-22 16:19:04,740 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2895, PETRI_PLACES=273, PETRI_TRANSITIONS=353} [2021-11-22 16:19:04,741 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 131 predicate places. [2021-11-22 16:19:04,741 INFO L470 AbstractCegarLoop]: Abstraction has has 273 places, 353 transitions, 2895 flow [2021-11-22 16:19:04,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 70.3125) internal successors, (2250), 32 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:04,742 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:19:04,743 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:19:04,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 16:19:04,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:19:04,959 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:19:04,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:19:04,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1832016228, now seen corresponding path program 1 times [2021-11-22 16:19:04,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:19:04,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848085564] [2021-11-22 16:19:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:19:04,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:19:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:19:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:19:05,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:19:05,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848085564] [2021-11-22 16:19:05,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848085564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:19:05,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47783326] [2021-11-22 16:19:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:19:05,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:19:05,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:19:05,868 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:19:05,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 16:19:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:19:05,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-22 16:19:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:19:07,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:19:07,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2021-11-22 16:19:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:19:08,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:19:08,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:19:08,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 59 [2021-11-22 16:19:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:19:10,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47783326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:19:10,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:19:10,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 25] total 70 [2021-11-22 16:19:10,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394134137] [2021-11-22 16:19:10,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:19:10,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-22 16:19:10,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:19:10,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-22 16:19:10,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=836, Invalid=3994, Unknown=0, NotChecked=0, Total=4830 [2021-11-22 16:19:10,926 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 159 [2021-11-22 16:19:10,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 353 transitions, 2895 flow. Second operand has 70 states, 70 states have (on average 67.98571428571428) internal successors, (4759), 70 states have internal predecessors, (4759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:10,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:19:10,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 159 [2021-11-22 16:19:10,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:19:24,168 INFO L129 PetriNetUnfolder]: 17470/28249 cut-off events. [2021-11-22 16:19:24,169 INFO L130 PetriNetUnfolder]: For 108170/108170 co-relation queries the response was YES. [2021-11-22 16:19:24,441 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109463 conditions, 28249 events. 17470/28249 cut-off events. For 108170/108170 co-relation queries the response was YES. Maximal size of possible extension queue 1565. Compared 228096 event pairs, 517 based on Foata normal form. 8/28134 useless extension candidates. Maximal degree in co-relation 109407. Up to 7231 conditions per place. [2021-11-22 16:19:24,649 INFO L132 encePairwiseOnDemand]: 119/159 looper letters, 787 selfloop transitions, 422 changer transitions 20/1281 dead transitions. [2021-11-22 16:19:24,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1281 transitions, 10684 flow [2021-11-22 16:19:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-22 16:19:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-11-22 16:19:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 7091 transitions. [2021-11-22 16:19:24,665 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46944720291294273 [2021-11-22 16:19:24,666 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 7091 transitions. [2021-11-22 16:19:24,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 7091 transitions. [2021-11-22 16:19:24,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:19:24,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 7091 transitions. [2021-11-22 16:19:24,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 74.6421052631579) internal successors, (7091), 95 states have internal predecessors, (7091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:24,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 159.0) internal successors, (15264), 96 states have internal predecessors, (15264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:24,721 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 159.0) internal successors, (15264), 96 states have internal predecessors, (15264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:24,721 INFO L186 Difference]: Start difference. First operand has 273 places, 353 transitions, 2895 flow. Second operand 95 states and 7091 transitions. [2021-11-22 16:19:24,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1281 transitions, 10684 flow [2021-11-22 16:19:26,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1281 transitions, 10440 flow, removed 99 selfloop flow, removed 20 redundant places. [2021-11-22 16:19:26,157 INFO L242 Difference]: Finished difference. Result has 398 places, 613 transitions, 6860 flow [2021-11-22 16:19:26,157 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=2742, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=6860, PETRI_PLACES=398, PETRI_TRANSITIONS=613} [2021-11-22 16:19:26,158 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 256 predicate places. [2021-11-22 16:19:26,158 INFO L470 AbstractCegarLoop]: Abstraction has has 398 places, 613 transitions, 6860 flow [2021-11-22 16:19:26,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 67.98571428571428) internal successors, (4759), 70 states have internal predecessors, (4759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:26,160 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:19:26,160 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:19:26,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 16:19:26,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-22 16:19:26,388 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:19:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:19:26,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1719053034, now seen corresponding path program 3 times [2021-11-22 16:19:26,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:19:26,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372513098] [2021-11-22 16:19:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:19:26,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:19:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:19:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:19:27,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:19:27,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372513098] [2021-11-22 16:19:27,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372513098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:19:27,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044569051] [2021-11-22 16:19:27,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:19:27,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:19:27,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:19:27,114 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:19:27,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 16:19:27,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 16:19:27,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:19:27,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-22 16:19:27,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:19:28,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:19:28,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 47 [2021-11-22 16:19:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:19:29,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:19:30,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:19:30,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 64 [2021-11-22 16:19:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:19:31,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044569051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:19:31,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:19:31,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 22] total 61 [2021-11-22 16:19:31,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311573736] [2021-11-22 16:19:31,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:19:31,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-22 16:19:31,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:19:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-22 16:19:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=2970, Unknown=0, NotChecked=0, Total=3660 [2021-11-22 16:19:31,584 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 159 [2021-11-22 16:19:31,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 613 transitions, 6860 flow. Second operand has 61 states, 61 states have (on average 68.37704918032787) internal successors, (4171), 61 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:31,589 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:19:31,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 159 [2021-11-22 16:19:31,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:19:49,953 INFO L129 PetriNetUnfolder]: 22230/36660 cut-off events. [2021-11-22 16:19:49,953 INFO L130 PetriNetUnfolder]: For 315267/315368 co-relation queries the response was YES. [2021-11-22 16:19:50,603 INFO L84 FinitePrefix]: Finished finitePrefix Result has 179816 conditions, 36660 events. 22230/36660 cut-off events. For 315267/315368 co-relation queries the response was YES. Maximal size of possible extension queue 1968. Compared 312395 event pairs, 3799 based on Foata normal form. 29/36450 useless extension candidates. Maximal degree in co-relation 179709. Up to 11104 conditions per place. [2021-11-22 16:19:50,855 INFO L132 encePairwiseOnDemand]: 119/159 looper letters, 660 selfloop transitions, 671 changer transitions 13/1396 dead transitions. [2021-11-22 16:19:50,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 1396 transitions, 16233 flow [2021-11-22 16:19:50,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-22 16:19:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-11-22 16:19:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 6934 transitions. [2021-11-22 16:19:50,882 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45905329361138697 [2021-11-22 16:19:50,882 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 6934 transitions. [2021-11-22 16:19:50,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 6934 transitions. [2021-11-22 16:19:50,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:19:50,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 6934 transitions. [2021-11-22 16:19:50,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 72.98947368421052) internal successors, (6934), 95 states have internal predecessors, (6934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:50,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 159.0) internal successors, (15264), 96 states have internal predecessors, (15264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:50,934 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 159.0) internal successors, (15264), 96 states have internal predecessors, (15264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:50,935 INFO L186 Difference]: Start difference. First operand has 398 places, 613 transitions, 6860 flow. Second operand 95 states and 6934 transitions. [2021-11-22 16:19:50,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 1396 transitions, 16233 flow [2021-11-22 16:19:56,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1396 transitions, 15304 flow, removed 416 selfloop flow, removed 36 redundant places. [2021-11-22 16:19:56,766 INFO L242 Difference]: Finished difference. Result has 486 places, 904 transitions, 12499 flow [2021-11-22 16:19:56,767 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=6375, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=12499, PETRI_PLACES=486, PETRI_TRANSITIONS=904} [2021-11-22 16:19:56,768 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 344 predicate places. [2021-11-22 16:19:56,768 INFO L470 AbstractCegarLoop]: Abstraction has has 486 places, 904 transitions, 12499 flow [2021-11-22 16:19:56,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 68.37704918032787) internal successors, (4171), 61 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:19:56,769 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:19:56,769 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:19:56,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-22 16:19:56,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:19:56,996 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:19:56,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:19:56,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1636402726, now seen corresponding path program 4 times [2021-11-22 16:19:56,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:19:56,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322691336] [2021-11-22 16:19:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:19:56,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:19:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:19:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:19:58,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:19:58,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322691336] [2021-11-22 16:19:58,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322691336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:19:58,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158074756] [2021-11-22 16:19:58,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:19:58,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:19:58,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:19:58,637 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:19:58,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 16:19:58,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:19:58,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:19:58,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-22 16:19:58,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:19:59,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 16:20:00,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-22 16:20:01,415 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-22 16:20:01,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-11-22 16:20:01,662 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-22 16:20:01,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-11-22 16:20:02,056 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-22 16:20:02,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 40 [2021-11-22 16:20:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:02,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:46,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:20:46,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125017 treesize of output 122893 [2021-11-22 16:20:47,165 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-22 16:20:47,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-22 16:20:47,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-11-22 16:20:47,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018083456] [2021-11-22 16:20:47,166 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:47,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-22 16:20:47,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:47,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-22 16:20:47,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=4758, Unknown=8, NotChecked=0, Total=5550 [2021-11-22 16:20:47,171 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 159 [2021-11-22 16:20:47,173 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 904 transitions, 12499 flow. Second operand has 33 states, 33 states have (on average 62.36363636363637) internal successors, (2058), 33 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:47,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:20:47,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 159 [2021-11-22 16:20:47,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:20:59,475 INFO L129 PetriNetUnfolder]: 11568/22710 cut-off events. [2021-11-22 16:20:59,475 INFO L130 PetriNetUnfolder]: For 312300/313036 co-relation queries the response was YES. [2021-11-22 16:21:00,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130836 conditions, 22710 events. 11568/22710 cut-off events. For 312300/313036 co-relation queries the response was YES. Maximal size of possible extension queue 1383. Compared 220332 event pairs, 1288 based on Foata normal form. 158/22631 useless extension candidates. Maximal degree in co-relation 130700. Up to 9034 conditions per place. [2021-11-22 16:21:00,311 INFO L132 encePairwiseOnDemand]: 124/159 looper letters, 523 selfloop transitions, 486 changer transitions 5/1094 dead transitions. [2021-11-22 16:21:00,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 1094 transitions, 16371 flow [2021-11-22 16:21:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-22 16:21:00,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-22 16:21:00,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2644 transitions. [2021-11-22 16:21:00,317 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4263828414771811 [2021-11-22 16:21:00,317 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2644 transitions. [2021-11-22 16:21:00,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2644 transitions. [2021-11-22 16:21:00,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:21:00,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2644 transitions. [2021-11-22 16:21:00,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 67.7948717948718) internal successors, (2644), 39 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:00,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 159.0) internal successors, (6360), 40 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:00,341 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 159.0) internal successors, (6360), 40 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:00,341 INFO L186 Difference]: Start difference. First operand has 486 places, 904 transitions, 12499 flow. Second operand 39 states and 2644 transitions. [2021-11-22 16:21:00,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 1094 transitions, 16371 flow [2021-11-22 16:21:06,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1094 transitions, 15553 flow, removed 326 selfloop flow, removed 38 redundant places. [2021-11-22 16:21:06,549 INFO L242 Difference]: Finished difference. Result has 489 places, 945 transitions, 14089 flow [2021-11-22 16:21:06,551 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=11737, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=14089, PETRI_PLACES=489, PETRI_TRANSITIONS=945} [2021-11-22 16:21:06,551 INFO L334 CegarLoopForPetriNet]: 142 programPoint places, 347 predicate places. [2021-11-22 16:21:06,551 INFO L470 AbstractCegarLoop]: Abstraction has has 489 places, 945 transitions, 14089 flow [2021-11-22 16:21:06,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 62.36363636363637) internal successors, (2058), 33 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:06,553 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 16:21:06,553 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:06,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 16:21:06,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:06,780 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-22 16:21:06,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:06,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1984341294, now seen corresponding path program 2 times [2021-11-22 16:21:06,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:06,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111212539] [2021-11-22 16:21:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:06,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:08,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:08,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111212539] [2021-11-22 16:21:08,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111212539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:08,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673058369] [2021-11-22 16:21:08,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:21:08,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:08,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:08,465 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:08,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e142bd15-58a5-43fd-acdc-1f30582bdd45/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 16:21:08,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:21:08,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:21:08,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-22 16:21:08,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:08,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:21:08,737 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:21:08,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-22 16:21:09,125 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-22 16:21:09,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-11-22 16:21:10,188 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-22 16:21:10,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2021-11-22 16:21:10,538 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-22 16:21:10,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 30 [2021-11-22 16:21:11,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:21:11,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 43 [2021-11-22 16:21:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:21:12,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:15,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:21:15,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 451 treesize of output 411 [2021-11-22 16:21:18,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-22 16:21:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:21:19,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673058369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:19,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:19,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 29, 29] total 82 [2021-11-22 16:21:19,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336655002] [2021-11-22 16:21:19,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:19,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-22 16:21:19,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:19,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-22 16:21:19,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=5715, Unknown=0, NotChecked=0, Total=6642 [2021-11-22 16:21:19,033 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 159 [2021-11-22 16:21:19,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 945 transitions, 14089 flow. Second operand has 82 states, 82 states have (on average 57.707317073170735) internal successors, (4732), 82 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:19,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 16:21:19,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 159 [2021-11-22 16:21:19,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 16:22:01,987 INFO L129 PetriNetUnfolder]: 36470/62524 cut-off events. [2021-11-22 16:22:01,988 INFO L130 PetriNetUnfolder]: For 946775/947983 co-relation queries the response was YES. [2021-11-22 16:22:04,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 358350 conditions, 62524 events. 36470/62524 cut-off events. For 946775/947983 co-relation queries the response was YES. Maximal size of possible extension queue 3580. Compared 607478 event pairs, 1748 based on Foata normal form. 729/62840 useless extension candidates. Maximal degree in co-relation 358218. Up to 16660 conditions per place. [2021-11-22 16:22:04,593 INFO L132 encePairwiseOnDemand]: 114/159 looper letters, 1426 selfloop transitions, 1424 changer transitions 32/2943 dead transitions. [2021-11-22 16:22:04,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 2943 transitions, 46628 flow [2021-11-22 16:22:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-22 16:22:04,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-11-22 16:22:04,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 8215 transitions. [2021-11-22 16:22:04,615 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2021-11-22 16:22:04,615 INFO L72 ComplementDD]: Start complementDD. Operand 129 states and 8215 transitions. [2021-11-22 16:22:04,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 8215 transitions. [2021-11-22 16:22:04,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 16:22:04,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 129 states and 8215 transitions. [2021-11-22 16:22:04,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 130 states, 129 states have (on average 63.68217054263566) internal successors, (8215), 129 states have internal predecessors, (8215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:04,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 130 states, 130 states have (on average 159.0) internal successors, (20670), 130 states have internal predecessors, (20670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:04,675 INFO L81 ComplementDD]: Finished complementDD. Result has 130 states, 130 states have (on average 159.0) internal successors, (20670), 130 states have internal predecessors, (20670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:04,675 INFO L186 Difference]: Start difference. First operand has 489 places, 945 transitions, 14089 flow. Second operand 129 states and 8215 transitions. [2021-11-22 16:22:04,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 2943 transitions, 46628 flow