./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN --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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:33:23,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:33:23,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:33:23,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:33:23,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:33:23,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:33:23,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:33:23,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:33:23,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:33:23,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:33:23,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:33:23,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:33:23,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:33:23,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:33:23,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:33:23,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:33:23,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:33:23,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:33:23,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:33:23,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:33:23,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:33:23,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:33:23,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:33:23,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:33:23,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:33:23,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:33:23,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:33:23,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:33:23,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:33:23,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:33:23,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:33:23,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:33:23,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:33:23,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:33:23,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:33:23,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:33:23,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:33:23,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:33:23,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:33:23,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:33:23,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:33:23,233 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:33:23,271 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:33:23,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:33:23,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:33:23,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:33:23,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:33:23,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:33:23,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:33:23,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:33:23,276 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:33:23,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:33:23,277 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:33:23,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:33:23,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:33:23,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:33:23,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:33:23,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:33:23,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:33:23,280 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:33:23,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:33:23,280 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:33:23,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:33:23,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:33:23,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:33:23,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:33:23,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:33:23,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:33:23,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:33:23,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:33:23,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:33:23,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:33:23,284 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:33:23,284 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:33:23,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:33:23,285 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_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf [2022-11-20 11:33:23,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:33:23,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:33:23,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:33:23,662 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:33:23,662 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:33:23,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-11-20 11:33:26,881 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:33:27,075 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:33:27,075 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-11-20 11:33:27,084 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/data/17c26f7e6/a6f8bc22081a45e99af4b5bc8900d468/FLAGde8e64f55 [2022-11-20 11:33:27,116 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/data/17c26f7e6/a6f8bc22081a45e99af4b5bc8900d468 [2022-11-20 11:33:27,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:33:27,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:33:27,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:33:27,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:33:27,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:33:27,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:33:27" (1/1) ... [2022-11-20 11:33:27,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65620e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27, skipping insertion in model container [2022-11-20 11:33:27,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:33:27" (1/1) ... [2022-11-20 11:33:27,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:33:27,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:33:27,483 WARN L237 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_aab7f456-81ab-44bb-bd09-cde66a091d0c/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2022-11-20 11:33:27,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:33:27,513 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:33:27,570 WARN L237 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_aab7f456-81ab-44bb-bd09-cde66a091d0c/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2022-11-20 11:33:27,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:33:27,590 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:33:27,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27 WrapperNode [2022-11-20 11:33:27,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:33:27,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:33:27,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:33:27,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:33:27,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27" (1/1) ... [2022-11-20 11:33:27,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27" (1/1) ... [2022-11-20 11:33:27,658 INFO L138 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-11-20 11:33:27,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:33:27,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:33:27,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:33:27,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:33:27,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27" (1/1) ... [2022-11-20 11:33:27,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27" (1/1) ... [2022-11-20 11:33:27,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27" (1/1) ... [2022-11-20 11:33:27,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27" (1/1) ... [2022-11-20 11:33:27,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27" (1/1) ... [2022-11-20 11:33:27,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27" (1/1) ... [2022-11-20 11:33:27,708 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27" (1/1) ... [2022-11-20 11:33:27,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27" (1/1) ... [2022-11-20 11:33:27,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:33:27,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:33:27,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:33:27,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:33:27,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27" (1/1) ... [2022-11-20 11:33:27,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:33:27,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:27,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:33:27,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:33:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:33:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:33:27,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:33:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:33:27,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:33:27,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 11:33:27,824 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 11:33:27,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:33:27,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:33:27,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:33:27,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 11:33:27,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 11:33:27,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:33:27,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:33:27,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:33:27,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:33:27,828 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:33:27,970 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:33:27,973 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:33:28,359 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:33:28,408 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:33:28,408 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:33:28,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:33:28 BoogieIcfgContainer [2022-11-20 11:33:28,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:33:28,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:33:28,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:33:28,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:33:28,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:33:27" (1/3) ... [2022-11-20 11:33:28,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81b6a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:33:28, skipping insertion in model container [2022-11-20 11:33:28,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:27" (2/3) ... [2022-11-20 11:33:28,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81b6a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:33:28, skipping insertion in model container [2022-11-20 11:33:28,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:33:28" (3/3) ... [2022-11-20 11:33:28,421 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2022-11-20 11:33:28,430 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:33:28,441 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:33:28,442 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:33:28,442 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:33:28,508 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 11:33:28,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2022-11-20 11:33:28,601 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-11-20 11:33:28,601 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 11:33:28,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2022-11-20 11:33:28,606 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2022-11-20 11:33:28,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2022-11-20 11:33:28,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:33:28,633 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@37879935, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:33:28,633 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 11:33:28,669 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2022-11-20 11:33:28,673 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 11:33:28,673 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:28,674 INFO L209 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] [2022-11-20 11:33:28,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:28,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:28,683 INFO L85 PathProgramCache]: Analyzing trace with hash 64157928, now seen corresponding path program 1 times [2022-11-20 11:33:28,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:28,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269260020] [2022-11-20 11:33:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:28,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:28,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:28,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269260020] [2022-11-20 11:33:28,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269260020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:28,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:28,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:33:28,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573329656] [2022-11-20 11:33:28,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:28,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:33:28,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:33:28,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:33:28,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2022-11-20 11:33:28,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:28,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:28,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2022-11-20 11:33:28,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:29,025 INFO L130 PetriNetUnfolder]: 26/138 cut-off events. [2022-11-20 11:33:29,025 INFO L131 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2022-11-20 11:33:29,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 260 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2022-11-20 11:33:29,028 INFO L137 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2022-11-20 11:33:29,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2022-11-20 11:33:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:33:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:33:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2022-11-20 11:33:29,043 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2022-11-20 11:33:29,044 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2022-11-20 11:33:29,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2022-11-20 11:33:29,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:29,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2022-11-20 11:33:29,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:29,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 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) [2022-11-20 11:33:29,055 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 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) [2022-11-20 11:33:29,057 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2022-11-20 11:33:29,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2022-11-20 11:33:29,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-20 11:33:29,070 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2022-11-20 11:33:29,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2022-11-20 11:33:29,077 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2022-11-20 11:33:29,078 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2022-11-20 11:33:29,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:29,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:29,079 INFO L209 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] [2022-11-20 11:33:29,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:33:29,080 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:29,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:29,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1685090523, now seen corresponding path program 1 times [2022-11-20 11:33:29,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:29,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299463195] [2022-11-20 11:33:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:29,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:29,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:29,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299463195] [2022-11-20 11:33:29,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299463195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:29,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:29,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:33:29,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212037886] [2022-11-20 11:33:29,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:29,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:33:29,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:29,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:33:29,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:33:29,887 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2022-11-20 11:33:29,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:29,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:29,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2022-11-20 11:33:29,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:30,120 INFO L130 PetriNetUnfolder]: 34/192 cut-off events. [2022-11-20 11:33:30,121 INFO L131 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-11-20 11:33:30,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 487 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2022-11-20 11:33:30,123 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2022-11-20 11:33:30,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2022-11-20 11:33:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:33:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:33:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-11-20 11:33:30,142 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-11-20 11:33:30,142 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-11-20 11:33:30,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-11-20 11:33:30,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:30,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-11-20 11:33:30,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:30,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:30,150 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:30,150 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2022-11-20 11:33:30,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2022-11-20 11:33:30,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:33:30,153 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2022-11-20 11:33:30,153 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-11-20 11:33:30,154 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2022-11-20 11:33:30,154 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2022-11-20 11:33:30,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:30,155 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:30,155 INFO L209 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] [2022-11-20 11:33:30,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:33:30,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:30,156 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2022-11-20 11:33:30,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:30,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914442388] [2022-11-20 11:33:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:30,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:30,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:30,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914442388] [2022-11-20 11:33:30,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914442388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:30,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:30,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:33:30,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567070137] [2022-11-20 11:33:30,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:30,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:33:30,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:30,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:33:30,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:33:30,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-20 11:33:30,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:30,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:30,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-20 11:33:30,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:31,120 INFO L130 PetriNetUnfolder]: 297/760 cut-off events. [2022-11-20 11:33:31,121 INFO L131 PetriNetUnfolder]: For 129/134 co-relation queries the response was YES. [2022-11-20 11:33:31,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 760 events. 297/760 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4116 event pairs, 54 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1452. Up to 254 conditions per place. [2022-11-20 11:33:31,133 INFO L137 encePairwiseOnDemand]: 87/97 looper letters, 53 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2022-11-20 11:33:31,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 486 flow [2022-11-20 11:33:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:33:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:33:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 636 transitions. [2022-11-20 11:33:31,144 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2022-11-20 11:33:31,144 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 636 transitions. [2022-11-20 11:33:31,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 636 transitions. [2022-11-20 11:33:31,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:31,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 636 transitions. [2022-11-20 11:33:31,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.5) internal successors, (636), 8 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:31,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 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) [2022-11-20 11:33:31,154 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 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) [2022-11-20 11:33:31,154 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 8 states and 636 transitions. [2022-11-20 11:33:31,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 486 flow [2022-11-20 11:33:31,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-20 11:33:31,163 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 330 flow [2022-11-20 11:33:31,164 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-11-20 11:33:31,166 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2022-11-20 11:33:31,166 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 330 flow [2022-11-20 11:33:31,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:31,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:31,168 INFO L209 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] [2022-11-20 11:33:31,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:33:31,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:31,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:31,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1242918831, now seen corresponding path program 2 times [2022-11-20 11:33:31,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:31,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889245022] [2022-11-20 11:33:31,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:31,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:31,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:31,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889245022] [2022-11-20 11:33:31,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889245022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:31,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:31,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:33:31,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258251409] [2022-11-20 11:33:31,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:31,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:33:31,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:31,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:33:31,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:33:31,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-20 11:33:31,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:31,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:31,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-20 11:33:31,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:31,794 INFO L130 PetriNetUnfolder]: 371/890 cut-off events. [2022-11-20 11:33:31,794 INFO L131 PetriNetUnfolder]: For 450/454 co-relation queries the response was YES. [2022-11-20 11:33:31,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 890 events. 371/890 cut-off events. For 450/454 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4799 event pairs, 71 based on Foata normal form. 18/843 useless extension candidates. Maximal degree in co-relation 2091. Up to 395 conditions per place. [2022-11-20 11:33:31,803 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 53 selfloop transitions, 21 changer transitions 2/133 dead transitions. [2022-11-20 11:33:31,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 628 flow [2022-11-20 11:33:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:33:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:33:31,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2022-11-20 11:33:31,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-11-20 11:33:31,806 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2022-11-20 11:33:31,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2022-11-20 11:33:31,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:31,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2022-11-20 11:33:31,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:31,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:31,811 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:31,811 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 330 flow. Second operand 6 states and 485 transitions. [2022-11-20 11:33:31,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 628 flow [2022-11-20 11:33:31,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:33:31,817 INFO L231 Difference]: Finished difference. Result has 104 places, 108 transitions, 469 flow [2022-11-20 11:33:31,818 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2022-11-20 11:33:31,819 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2022-11-20 11:33:31,819 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 469 flow [2022-11-20 11:33:31,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:31,819 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:31,820 INFO L209 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] [2022-11-20 11:33:31,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:33:31,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:31,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:31,821 INFO L85 PathProgramCache]: Analyzing trace with hash -871030193, now seen corresponding path program 3 times [2022-11-20 11:33:31,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:31,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730849273] [2022-11-20 11:33:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:31,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:32,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:32,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730849273] [2022-11-20 11:33:32,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730849273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:32,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:32,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:33:32,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373260859] [2022-11-20 11:33:32,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:32,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:33:32,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:32,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:33:32,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:33:32,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-20 11:33:32,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:32,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:32,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-20 11:33:32,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:32,845 INFO L130 PetriNetUnfolder]: 576/1349 cut-off events. [2022-11-20 11:33:32,845 INFO L131 PetriNetUnfolder]: For 998/1042 co-relation queries the response was YES. [2022-11-20 11:33:32,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3291 conditions, 1349 events. 576/1349 cut-off events. For 998/1042 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8212 event pairs, 89 based on Foata normal form. 19/1295 useless extension candidates. Maximal degree in co-relation 3275. Up to 389 conditions per place. [2022-11-20 11:33:32,860 INFO L137 encePairwiseOnDemand]: 85/97 looper letters, 70 selfloop transitions, 38 changer transitions 2/167 dead transitions. [2022-11-20 11:33:32,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 917 flow [2022-11-20 11:33:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:33:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:33:32,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 731 transitions. [2022-11-20 11:33:32,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8373424971363116 [2022-11-20 11:33:32,863 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 731 transitions. [2022-11-20 11:33:32,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 731 transitions. [2022-11-20 11:33:32,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:32,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 731 transitions. [2022-11-20 11:33:32,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.22222222222223) internal successors, (731), 9 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:32,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:32,869 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:32,869 INFO L175 Difference]: Start difference. First operand has 104 places, 108 transitions, 469 flow. Second operand 9 states and 731 transitions. [2022-11-20 11:33:32,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 917 flow [2022-11-20 11:33:32,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 871 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-20 11:33:32,881 INFO L231 Difference]: Finished difference. Result has 116 places, 121 transitions, 671 flow [2022-11-20 11:33:32,881 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2022-11-20 11:33:32,884 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2022-11-20 11:33:32,884 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 671 flow [2022-11-20 11:33:32,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:32,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:32,885 INFO L209 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] [2022-11-20 11:33:32,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:33:32,886 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:32,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1724152015, now seen corresponding path program 4 times [2022-11-20 11:33:32,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:32,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830673349] [2022-11-20 11:33:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:32,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:33,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:33,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830673349] [2022-11-20 11:33:33,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830673349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:33,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:33,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:33:33,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829420628] [2022-11-20 11:33:33,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:33,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:33:33,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:33,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:33:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:33:33,202 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-20 11:33:33,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 671 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:33,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:33,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-20 11:33:33,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:33,636 INFO L130 PetriNetUnfolder]: 594/1403 cut-off events. [2022-11-20 11:33:33,636 INFO L131 PetriNetUnfolder]: For 2229/2242 co-relation queries the response was YES. [2022-11-20 11:33:33,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3959 conditions, 1403 events. 594/1403 cut-off events. For 2229/2242 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8738 event pairs, 155 based on Foata normal form. 16/1316 useless extension candidates. Maximal degree in co-relation 3938. Up to 527 conditions per place. [2022-11-20 11:33:33,656 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 64 selfloop transitions, 37 changer transitions 2/160 dead transitions. [2022-11-20 11:33:33,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1072 flow [2022-11-20 11:33:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:33:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:33:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2022-11-20 11:33:33,659 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8234536082474226 [2022-11-20 11:33:33,659 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2022-11-20 11:33:33,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2022-11-20 11:33:33,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:33,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2022-11-20 11:33:33,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:33,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 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) [2022-11-20 11:33:33,665 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 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) [2022-11-20 11:33:33,665 INFO L175 Difference]: Start difference. First operand has 116 places, 121 transitions, 671 flow. Second operand 8 states and 639 transitions. [2022-11-20 11:33:33,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1072 flow [2022-11-20 11:33:33,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1052 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-20 11:33:33,682 INFO L231 Difference]: Finished difference. Result has 124 places, 128 transitions, 818 flow [2022-11-20 11:33:33,682 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2022-11-20 11:33:33,683 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 38 predicate places. [2022-11-20 11:33:33,684 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 818 flow [2022-11-20 11:33:33,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:33,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:33,684 INFO L209 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] [2022-11-20 11:33:33,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:33:33,685 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:33,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:33,686 INFO L85 PathProgramCache]: Analyzing trace with hash 552510010, now seen corresponding path program 1 times [2022-11-20 11:33:33,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:33,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881127663] [2022-11-20 11:33:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:33,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:34,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:34,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881127663] [2022-11-20 11:33:34,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881127663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:34,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:34,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:33:34,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647585703] [2022-11-20 11:33:34,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:34,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:33:34,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:34,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:33:34,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:33:34,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-20 11:33:34,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 818 flow. Second operand has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:34,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:34,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-20 11:33:34,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:34,610 INFO L130 PetriNetUnfolder]: 671/1555 cut-off events. [2022-11-20 11:33:34,611 INFO L131 PetriNetUnfolder]: For 3107/3129 co-relation queries the response was YES. [2022-11-20 11:33:34,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4726 conditions, 1555 events. 671/1555 cut-off events. For 3107/3129 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9899 event pairs, 158 based on Foata normal form. 25/1491 useless extension candidates. Maximal degree in co-relation 4701. Up to 579 conditions per place. [2022-11-20 11:33:34,630 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 82 selfloop transitions, 30 changer transitions 2/171 dead transitions. [2022-11-20 11:33:34,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 171 transitions, 1312 flow [2022-11-20 11:33:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:33:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:33:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2022-11-20 11:33:34,632 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8276877761413843 [2022-11-20 11:33:34,633 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2022-11-20 11:33:34,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2022-11-20 11:33:34,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:34,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2022-11-20 11:33:34,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:34,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:34,637 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:34,637 INFO L175 Difference]: Start difference. First operand has 124 places, 128 transitions, 818 flow. Second operand 7 states and 562 transitions. [2022-11-20 11:33:34,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 171 transitions, 1312 flow [2022-11-20 11:33:34,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 171 transitions, 1228 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-11-20 11:33:34,657 INFO L231 Difference]: Finished difference. Result has 129 places, 131 transitions, 889 flow [2022-11-20 11:33:34,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2022-11-20 11:33:34,658 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 43 predicate places. [2022-11-20 11:33:34,658 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 889 flow [2022-11-20 11:33:34,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:34,659 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:34,659 INFO L209 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] [2022-11-20 11:33:34,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:33:34,659 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2003174178, now seen corresponding path program 2 times [2022-11-20 11:33:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:34,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387585480] [2022-11-20 11:33:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:34,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:34,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:34,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387585480] [2022-11-20 11:33:34,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387585480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:34,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:34,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:33:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600312315] [2022-11-20 11:33:34,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:34,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:33:34,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:34,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:33:34,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:33:34,946 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-20 11:33:34,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 889 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:34,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:34,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-20 11:33:34,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:35,405 INFO L130 PetriNetUnfolder]: 677/1571 cut-off events. [2022-11-20 11:33:35,406 INFO L131 PetriNetUnfolder]: For 4096/4134 co-relation queries the response was YES. [2022-11-20 11:33:35,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5176 conditions, 1571 events. 677/1571 cut-off events. For 4096/4134 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10085 event pairs, 200 based on Foata normal form. 12/1488 useless extension candidates. Maximal degree in co-relation 5148. Up to 948 conditions per place. [2022-11-20 11:33:35,423 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 67 selfloop transitions, 25 changer transitions 0/149 dead transitions. [2022-11-20 11:33:35,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 149 transitions, 1154 flow [2022-11-20 11:33:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:33:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:33:35,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 405 transitions. [2022-11-20 11:33:35,426 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-11-20 11:33:35,426 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 405 transitions. [2022-11-20 11:33:35,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 405 transitions. [2022-11-20 11:33:35,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:35,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 405 transitions. [2022-11-20 11:33:35,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:35,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:35,429 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:35,429 INFO L175 Difference]: Start difference. First operand has 129 places, 131 transitions, 889 flow. Second operand 5 states and 405 transitions. [2022-11-20 11:33:35,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 149 transitions, 1154 flow [2022-11-20 11:33:35,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 149 transitions, 1131 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-20 11:33:35,448 INFO L231 Difference]: Finished difference. Result has 134 places, 133 transitions, 969 flow [2022-11-20 11:33:35,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=969, PETRI_PLACES=134, PETRI_TRANSITIONS=133} [2022-11-20 11:33:35,449 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 48 predicate places. [2022-11-20 11:33:35,449 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 133 transitions, 969 flow [2022-11-20 11:33:35,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:35,450 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:35,450 INFO L209 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] [2022-11-20 11:33:35,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:33:35,450 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:35,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:35,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1258106434, now seen corresponding path program 1 times [2022-11-20 11:33:35,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:35,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369531573] [2022-11-20 11:33:35,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:35,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:35,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:35,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369531573] [2022-11-20 11:33:35,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369531573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:35,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:35,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:33:35,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949512351] [2022-11-20 11:33:35,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:35,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:33:35,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:35,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:33:35,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:33:35,817 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-20 11:33:35,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 133 transitions, 969 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:35,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:35,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-20 11:33:35,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:36,522 INFO L130 PetriNetUnfolder]: 1228/2857 cut-off events. [2022-11-20 11:33:36,522 INFO L131 PetriNetUnfolder]: For 9792/10021 co-relation queries the response was YES. [2022-11-20 11:33:36,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9955 conditions, 2857 events. 1228/2857 cut-off events. For 9792/10021 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21964 event pairs, 203 based on Foata normal form. 65/2653 useless extension candidates. Maximal degree in co-relation 9924. Up to 1058 conditions per place. [2022-11-20 11:33:36,557 INFO L137 encePairwiseOnDemand]: 88/97 looper letters, 67 selfloop transitions, 72 changer transitions 0/207 dead transitions. [2022-11-20 11:33:36,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 207 transitions, 1947 flow [2022-11-20 11:33:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:33:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:33:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 497 transitions. [2022-11-20 11:33:36,559 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8539518900343642 [2022-11-20 11:33:36,559 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 497 transitions. [2022-11-20 11:33:36,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 497 transitions. [2022-11-20 11:33:36,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:36,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 497 transitions. [2022-11-20 11:33:36,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:36,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:36,563 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:36,563 INFO L175 Difference]: Start difference. First operand has 134 places, 133 transitions, 969 flow. Second operand 6 states and 497 transitions. [2022-11-20 11:33:36,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 207 transitions, 1947 flow [2022-11-20 11:33:36,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 207 transitions, 1887 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 11:33:36,611 INFO L231 Difference]: Finished difference. Result has 139 places, 171 transitions, 1567 flow [2022-11-20 11:33:36,611 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1567, PETRI_PLACES=139, PETRI_TRANSITIONS=171} [2022-11-20 11:33:36,612 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 53 predicate places. [2022-11-20 11:33:36,612 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 171 transitions, 1567 flow [2022-11-20 11:33:36,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:36,613 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:36,613 INFO L209 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] [2022-11-20 11:33:36,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:33:36,613 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:36,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:36,614 INFO L85 PathProgramCache]: Analyzing trace with hash 449066326, now seen corresponding path program 2 times [2022-11-20 11:33:36,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:36,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723616153] [2022-11-20 11:33:36,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:36,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:36,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:36,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723616153] [2022-11-20 11:33:36,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723616153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:36,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:36,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:33:36,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128998598] [2022-11-20 11:33:36,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:36,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:33:36,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:36,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:33:36,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:33:36,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-20 11:33:36,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 171 transitions, 1567 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:36,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:36,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-20 11:33:36,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:37,839 INFO L130 PetriNetUnfolder]: 1575/3588 cut-off events. [2022-11-20 11:33:37,839 INFO L131 PetriNetUnfolder]: For 16000/16324 co-relation queries the response was YES. [2022-11-20 11:33:37,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14478 conditions, 3588 events. 1575/3588 cut-off events. For 16000/16324 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28641 event pairs, 146 based on Foata normal form. 121/3597 useless extension candidates. Maximal degree in co-relation 14445. Up to 1111 conditions per place. [2022-11-20 11:33:37,962 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 125 selfloop transitions, 120 changer transitions 0/313 dead transitions. [2022-11-20 11:33:37,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 313 transitions, 3873 flow [2022-11-20 11:33:37,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:33:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:33:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 491 transitions. [2022-11-20 11:33:37,965 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8436426116838488 [2022-11-20 11:33:37,965 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 491 transitions. [2022-11-20 11:33:37,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 491 transitions. [2022-11-20 11:33:37,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:37,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 491 transitions. [2022-11-20 11:33:37,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.83333333333333) internal successors, (491), 6 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:37,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:37,970 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:37,970 INFO L175 Difference]: Start difference. First operand has 139 places, 171 transitions, 1567 flow. Second operand 6 states and 491 transitions. [2022-11-20 11:33:37,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 313 transitions, 3873 flow [2022-11-20 11:33:38,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 313 transitions, 3873 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:33:38,100 INFO L231 Difference]: Finished difference. Result has 148 places, 244 transitions, 3014 flow [2022-11-20 11:33:38,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3014, PETRI_PLACES=148, PETRI_TRANSITIONS=244} [2022-11-20 11:33:38,102 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 62 predicate places. [2022-11-20 11:33:38,102 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 244 transitions, 3014 flow [2022-11-20 11:33:38,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:38,103 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:38,103 INFO L209 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] [2022-11-20 11:33:38,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:33:38,104 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1331398698, now seen corresponding path program 3 times [2022-11-20 11:33:38,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:38,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663593169] [2022-11-20 11:33:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:38,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:38,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:38,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663593169] [2022-11-20 11:33:38,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663593169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:38,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:38,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:33:38,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33504249] [2022-11-20 11:33:38,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:38,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:33:38,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:33:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:33:38,486 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-20 11:33:38,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 244 transitions, 3014 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:38,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:38,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-20 11:33:38,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:39,500 INFO L130 PetriNetUnfolder]: 1618/3806 cut-off events. [2022-11-20 11:33:39,501 INFO L131 PetriNetUnfolder]: For 21712/22213 co-relation queries the response was YES. [2022-11-20 11:33:39,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16958 conditions, 3806 events. 1618/3806 cut-off events. For 21712/22213 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30885 event pairs, 244 based on Foata normal form. 167/3837 useless extension candidates. Maximal degree in co-relation 16920. Up to 1202 conditions per place. [2022-11-20 11:33:39,558 INFO L137 encePairwiseOnDemand]: 87/97 looper letters, 70 selfloop transitions, 136 changer transitions 0/274 dead transitions. [2022-11-20 11:33:39,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 274 transitions, 3619 flow [2022-11-20 11:33:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:33:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:33:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-11-20 11:33:39,560 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-11-20 11:33:39,561 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-11-20 11:33:39,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-11-20 11:33:39,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:39,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-11-20 11:33:39,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:39,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:39,564 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:39,565 INFO L175 Difference]: Start difference. First operand has 148 places, 244 transitions, 3014 flow. Second operand 6 states and 486 transitions. [2022-11-20 11:33:39,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 274 transitions, 3619 flow [2022-11-20 11:33:39,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 274 transitions, 3611 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-20 11:33:39,646 INFO L231 Difference]: Finished difference. Result has 156 places, 251 transitions, 3513 flow [2022-11-20 11:33:39,647 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3006, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3513, PETRI_PLACES=156, PETRI_TRANSITIONS=251} [2022-11-20 11:33:39,647 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 70 predicate places. [2022-11-20 11:33:39,647 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 251 transitions, 3513 flow [2022-11-20 11:33:39,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:39,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:39,648 INFO L209 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] [2022-11-20 11:33:39,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:33:39,649 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:39,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:39,649 INFO L85 PathProgramCache]: Analyzing trace with hash 103117984, now seen corresponding path program 4 times [2022-11-20 11:33:39,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:39,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251604849] [2022-11-20 11:33:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:39,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:39,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:39,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251604849] [2022-11-20 11:33:39,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251604849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:39,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:39,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:33:39,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996419223] [2022-11-20 11:33:39,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:39,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:33:39,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:39,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:33:39,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:33:39,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-20 11:33:39,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 251 transitions, 3513 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:39,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:39,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-20 11:33:39,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:41,066 INFO L130 PetriNetUnfolder]: 1601/3781 cut-off events. [2022-11-20 11:33:41,067 INFO L131 PetriNetUnfolder]: For 27861/28305 co-relation queries the response was YES. [2022-11-20 11:33:41,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18251 conditions, 3781 events. 1601/3781 cut-off events. For 27861/28305 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30914 event pairs, 161 based on Foata normal form. 137/3798 useless extension candidates. Maximal degree in co-relation 18209. Up to 1179 conditions per place. [2022-11-20 11:33:41,151 INFO L137 encePairwiseOnDemand]: 88/97 looper letters, 101 selfloop transitions, 138 changer transitions 3/310 dead transitions. [2022-11-20 11:33:41,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 310 transitions, 4794 flow [2022-11-20 11:33:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:33:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:33:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2022-11-20 11:33:41,155 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8577319587628865 [2022-11-20 11:33:41,155 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2022-11-20 11:33:41,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2022-11-20 11:33:41,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:41,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2022-11-20 11:33:41,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:41,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:41,159 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:41,160 INFO L175 Difference]: Start difference. First operand has 156 places, 251 transitions, 3513 flow. Second operand 5 states and 416 transitions. [2022-11-20 11:33:41,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 310 transitions, 4794 flow [2022-11-20 11:33:41,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 310 transitions, 4620 flow, removed 14 selfloop flow, removed 2 redundant places. [2022-11-20 11:33:41,327 INFO L231 Difference]: Finished difference. Result has 161 places, 270 transitions, 4162 flow [2022-11-20 11:33:41,327 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4162, PETRI_PLACES=161, PETRI_TRANSITIONS=270} [2022-11-20 11:33:41,328 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 75 predicate places. [2022-11-20 11:33:41,329 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 270 transitions, 4162 flow [2022-11-20 11:33:41,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:41,329 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:41,330 INFO L209 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] [2022-11-20 11:33:41,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:33:41,330 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:41,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash 751375630, now seen corresponding path program 5 times [2022-11-20 11:33:41,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:41,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039169179] [2022-11-20 11:33:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:41,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:41,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:41,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039169179] [2022-11-20 11:33:41,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039169179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:41,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:41,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:33:41,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305827747] [2022-11-20 11:33:41,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:41,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:33:41,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:41,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:33:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:33:41,766 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-20 11:33:41,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 270 transitions, 4162 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:41,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:41,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-20 11:33:41,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:42,861 INFO L130 PetriNetUnfolder]: 1621/3984 cut-off events. [2022-11-20 11:33:42,862 INFO L131 PetriNetUnfolder]: For 31456/32021 co-relation queries the response was YES. [2022-11-20 11:33:42,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19871 conditions, 3984 events. 1621/3984 cut-off events. For 31456/32021 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33621 event pairs, 177 based on Foata normal form. 155/4011 useless extension candidates. Maximal degree in co-relation 19826. Up to 1308 conditions per place. [2022-11-20 11:33:42,939 INFO L137 encePairwiseOnDemand]: 88/97 looper letters, 82 selfloop transitions, 170 changer transitions 6/326 dead transitions. [2022-11-20 11:33:42,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 326 transitions, 5438 flow [2022-11-20 11:33:42,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:33:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:33:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-11-20 11:33:42,942 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-11-20 11:33:42,942 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-11-20 11:33:42,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-11-20 11:33:42,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:42,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-11-20 11:33:42,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:42,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:42,948 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:42,948 INFO L175 Difference]: Start difference. First operand has 161 places, 270 transitions, 4162 flow. Second operand 6 states and 493 transitions. [2022-11-20 11:33:42,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 326 transitions, 5438 flow [2022-11-20 11:33:43,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 326 transitions, 5322 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-20 11:33:43,115 INFO L231 Difference]: Finished difference. Result has 167 places, 287 transitions, 4784 flow [2022-11-20 11:33:43,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4784, PETRI_PLACES=167, PETRI_TRANSITIONS=287} [2022-11-20 11:33:43,116 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 81 predicate places. [2022-11-20 11:33:43,117 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 287 transitions, 4784 flow [2022-11-20 11:33:43,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:43,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:43,117 INFO L209 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] [2022-11-20 11:33:43,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:33:43,118 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:43,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:43,119 INFO L85 PathProgramCache]: Analyzing trace with hash 716376916, now seen corresponding path program 6 times [2022-11-20 11:33:43,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:43,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799402859] [2022-11-20 11:33:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:43,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:43,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:43,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799402859] [2022-11-20 11:33:43,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799402859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:43,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499721500] [2022-11-20 11:33:43,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:33:43,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:43,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:43,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:33:43,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:33:43,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 11:33:43,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:33:43,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:33:43,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:44,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:33:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:44,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499721500] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:44,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:33:44,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-11-20 11:33:44,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321429185] [2022-11-20 11:33:44,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:44,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:33:44,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:44,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:33:44,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:33:44,398 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-11-20 11:33:44,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 287 transitions, 4784 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:44,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:44,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-11-20 11:33:44,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:46,691 INFO L130 PetriNetUnfolder]: 3366/7858 cut-off events. [2022-11-20 11:33:46,692 INFO L131 PetriNetUnfolder]: For 65557/65557 co-relation queries the response was YES. [2022-11-20 11:33:46,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39234 conditions, 7858 events. 3366/7858 cut-off events. For 65557/65557 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 72706 event pairs, 190 based on Foata normal form. 18/7780 useless extension candidates. Maximal degree in co-relation 39187. Up to 1525 conditions per place. [2022-11-20 11:33:46,861 INFO L137 encePairwiseOnDemand]: 82/97 looper letters, 384 selfloop transitions, 166 changer transitions 3/608 dead transitions. [2022-11-20 11:33:46,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 608 transitions, 11034 flow [2022-11-20 11:33:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:33:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:33:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 573 transitions. [2022-11-20 11:33:46,864 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8438880706921944 [2022-11-20 11:33:46,865 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 573 transitions. [2022-11-20 11:33:46,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 573 transitions. [2022-11-20 11:33:46,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:46,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 573 transitions. [2022-11-20 11:33:46,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:46,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:46,871 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:46,871 INFO L175 Difference]: Start difference. First operand has 167 places, 287 transitions, 4784 flow. Second operand 7 states and 573 transitions. [2022-11-20 11:33:46,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 608 transitions, 11034 flow [2022-11-20 11:33:47,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 608 transitions, 10904 flow, removed 65 selfloop flow, removed 0 redundant places. [2022-11-20 11:33:47,207 INFO L231 Difference]: Finished difference. Result has 178 places, 417 transitions, 7758 flow [2022-11-20 11:33:47,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4746, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7758, PETRI_PLACES=178, PETRI_TRANSITIONS=417} [2022-11-20 11:33:47,209 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 92 predicate places. [2022-11-20 11:33:47,209 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 417 transitions, 7758 flow [2022-11-20 11:33:47,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:47,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:47,210 INFO L209 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] [2022-11-20 11:33:47,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:33:47,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:47,416 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:47,417 INFO L85 PathProgramCache]: Analyzing trace with hash -329411296, now seen corresponding path program 7 times [2022-11-20 11:33:47,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:47,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507644733] [2022-11-20 11:33:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:47,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:47,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:47,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507644733] [2022-11-20 11:33:47,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507644733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:47,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161911498] [2022-11-20 11:33:47,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:33:47,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:47,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:47,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:33:47,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:33:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:47,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:33:47,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:48,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:33:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:48,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161911498] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:48,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:33:48,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-11-20 11:33:48,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729548274] [2022-11-20 11:33:48,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:48,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:33:48,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:48,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:33:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:33:48,371 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-11-20 11:33:48,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 417 transitions, 7758 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:48,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:48,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-11-20 11:33:48,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:50,670 INFO L130 PetriNetUnfolder]: 3516/8354 cut-off events. [2022-11-20 11:33:50,671 INFO L131 PetriNetUnfolder]: For 89350/89402 co-relation queries the response was YES. [2022-11-20 11:33:50,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46807 conditions, 8354 events. 3516/8354 cut-off events. For 89350/89402 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 78742 event pairs, 482 based on Foata normal form. 15/8220 useless extension candidates. Maximal degree in co-relation 46755. Up to 2626 conditions per place. [2022-11-20 11:33:50,839 INFO L137 encePairwiseOnDemand]: 82/97 looper letters, 264 selfloop transitions, 226 changer transitions 5/550 dead transitions. [2022-11-20 11:33:50,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 550 transitions, 10498 flow [2022-11-20 11:33:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:33:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:33:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 570 transitions. [2022-11-20 11:33:50,843 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8394698085419735 [2022-11-20 11:33:50,843 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 570 transitions. [2022-11-20 11:33:50,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 570 transitions. [2022-11-20 11:33:50,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:50,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 570 transitions. [2022-11-20 11:33:50,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:50,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:50,849 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:50,849 INFO L175 Difference]: Start difference. First operand has 178 places, 417 transitions, 7758 flow. Second operand 7 states and 570 transitions. [2022-11-20 11:33:50,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 550 transitions, 10498 flow [2022-11-20 11:33:51,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 550 transitions, 10371 flow, removed 57 selfloop flow, removed 1 redundant places. [2022-11-20 11:33:51,233 INFO L231 Difference]: Finished difference. Result has 189 places, 450 transitions, 9066 flow [2022-11-20 11:33:51,234 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7643, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9066, PETRI_PLACES=189, PETRI_TRANSITIONS=450} [2022-11-20 11:33:51,235 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 103 predicate places. [2022-11-20 11:33:51,235 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 450 transitions, 9066 flow [2022-11-20 11:33:51,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:51,235 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:51,236 INFO L209 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] [2022-11-20 11:33:51,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:33:51,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:51,442 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:51,443 INFO L85 PathProgramCache]: Analyzing trace with hash 39199722, now seen corresponding path program 8 times [2022-11-20 11:33:51,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:51,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160979979] [2022-11-20 11:33:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:51,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:51,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:51,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160979979] [2022-11-20 11:33:51,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160979979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:51,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:51,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:33:51,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856407540] [2022-11-20 11:33:51,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:51,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:33:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:33:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:33:51,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-20 11:33:51,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 450 transitions, 9066 flow. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:51,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:51,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-20 11:33:51,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:54,221 INFO L130 PetriNetUnfolder]: 3130/7944 cut-off events. [2022-11-20 11:33:54,221 INFO L131 PetriNetUnfolder]: For 119995/121213 co-relation queries the response was YES. [2022-11-20 11:33:54,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49654 conditions, 7944 events. 3130/7944 cut-off events. For 119995/121213 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 77659 event pairs, 425 based on Foata normal form. 318/8031 useless extension candidates. Maximal degree in co-relation 49597. Up to 1525 conditions per place. [2022-11-20 11:33:54,386 INFO L137 encePairwiseOnDemand]: 88/97 looper letters, 135 selfloop transitions, 363 changer transitions 4/588 dead transitions. [2022-11-20 11:33:54,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 588 transitions, 12933 flow [2022-11-20 11:33:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:33:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:33:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 580 transitions. [2022-11-20 11:33:54,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8541973490427098 [2022-11-20 11:33:54,390 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 580 transitions. [2022-11-20 11:33:54,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 580 transitions. [2022-11-20 11:33:54,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:54,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 580 transitions. [2022-11-20 11:33:54,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:54,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:54,398 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:54,399 INFO L175 Difference]: Start difference. First operand has 189 places, 450 transitions, 9066 flow. Second operand 7 states and 580 transitions. [2022-11-20 11:33:54,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 588 transitions, 12933 flow [2022-11-20 11:33:54,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 588 transitions, 12891 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-20 11:33:54,804 INFO L231 Difference]: Finished difference. Result has 196 places, 520 transitions, 11960 flow [2022-11-20 11:33:54,804 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9040, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11960, PETRI_PLACES=196, PETRI_TRANSITIONS=520} [2022-11-20 11:33:54,805 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 110 predicate places. [2022-11-20 11:33:54,805 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 520 transitions, 11960 flow [2022-11-20 11:33:54,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:54,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:54,805 INFO L209 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] [2022-11-20 11:33:54,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:33:54,806 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:54,807 INFO L85 PathProgramCache]: Analyzing trace with hash 184225578, now seen corresponding path program 3 times [2022-11-20 11:33:54,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:54,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914116996] [2022-11-20 11:33:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:54,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:55,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:55,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914116996] [2022-11-20 11:33:55,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914116996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:55,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:55,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:33:55,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484465394] [2022-11-20 11:33:55,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:55,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:33:55,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:55,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:33:55,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:33:55,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-20 11:33:55,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 520 transitions, 11960 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:55,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:55,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-20 11:33:55,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:33:57,443 INFO L130 PetriNetUnfolder]: 3425/8583 cut-off events. [2022-11-20 11:33:57,444 INFO L131 PetriNetUnfolder]: For 142296/142561 co-relation queries the response was YES. [2022-11-20 11:33:57,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54711 conditions, 8583 events. 3425/8583 cut-off events. For 142296/142561 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 83422 event pairs, 823 based on Foata normal form. 48/8387 useless extension candidates. Maximal degree in co-relation 54652. Up to 4903 conditions per place. [2022-11-20 11:33:57,570 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 422 selfloop transitions, 59 changer transitions 10/562 dead transitions. [2022-11-20 11:33:57,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 562 transitions, 13544 flow [2022-11-20 11:33:57,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:33:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:33:57,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2022-11-20 11:33:57,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2022-11-20 11:33:57,573 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2022-11-20 11:33:57,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2022-11-20 11:33:57,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:33:57,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2022-11-20 11:33:57,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:57,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:57,577 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:57,577 INFO L175 Difference]: Start difference. First operand has 196 places, 520 transitions, 11960 flow. Second operand 6 states and 476 transitions. [2022-11-20 11:33:57,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 562 transitions, 13544 flow [2022-11-20 11:33:57,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 562 transitions, 13378 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-20 11:33:57,970 INFO L231 Difference]: Finished difference. Result has 201 places, 513 transitions, 11779 flow [2022-11-20 11:33:57,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=11505, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11779, PETRI_PLACES=201, PETRI_TRANSITIONS=513} [2022-11-20 11:33:57,971 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 115 predicate places. [2022-11-20 11:33:57,972 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 513 transitions, 11779 flow [2022-11-20 11:33:57,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:57,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:33:57,972 INFO L209 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] [2022-11-20 11:33:57,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:33:57,972 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:33:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:57,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1787512, now seen corresponding path program 9 times [2022-11-20 11:33:57,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:57,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488393559] [2022-11-20 11:33:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:57,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:58,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:58,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488393559] [2022-11-20 11:33:58,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488393559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:33:58,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:33:58,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:33:58,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396831633] [2022-11-20 11:33:58,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:33:58,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:33:58,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:58,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:33:58,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:33:58,299 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-20 11:33:58,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 513 transitions, 11779 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:58,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:33:58,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-20 11:33:58,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:34:00,544 INFO L130 PetriNetUnfolder]: 2981/7440 cut-off events. [2022-11-20 11:34:00,544 INFO L131 PetriNetUnfolder]: For 122249/123411 co-relation queries the response was YES. [2022-11-20 11:34:00,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47902 conditions, 7440 events. 2981/7440 cut-off events. For 122249/123411 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 71611 event pairs, 221 based on Foata normal form. 306/7581 useless extension candidates. Maximal degree in co-relation 47839. Up to 2038 conditions per place. [2022-11-20 11:34:00,669 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 246 selfloop transitions, 231 changer transitions 8/570 dead transitions. [2022-11-20 11:34:00,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 570 transitions, 13621 flow [2022-11-20 11:34:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:34:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:34:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2022-11-20 11:34:00,671 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8494845360824742 [2022-11-20 11:34:00,671 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2022-11-20 11:34:00,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2022-11-20 11:34:00,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:34:00,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2022-11-20 11:34:00,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:00,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:00,674 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:00,674 INFO L175 Difference]: Start difference. First operand has 201 places, 513 transitions, 11779 flow. Second operand 5 states and 412 transitions. [2022-11-20 11:34:00,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 570 transitions, 13621 flow [2022-11-20 11:34:01,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 570 transitions, 13486 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-20 11:34:01,145 INFO L231 Difference]: Finished difference. Result has 204 places, 506 transitions, 12168 flow [2022-11-20 11:34:01,145 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=11577, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12168, PETRI_PLACES=204, PETRI_TRANSITIONS=506} [2022-11-20 11:34:01,146 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 118 predicate places. [2022-11-20 11:34:01,146 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 506 transitions, 12168 flow [2022-11-20 11:34:01,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:01,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:34:01,146 INFO L209 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] [2022-11-20 11:34:01,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 11:34:01,146 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:34:01,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:01,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1225597636, now seen corresponding path program 10 times [2022-11-20 11:34:01,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:01,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728107412] [2022-11-20 11:34:01,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:01,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:01,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:01,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728107412] [2022-11-20 11:34:01,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728107412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:01,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178758947] [2022-11-20 11:34:01,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:34:01,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:01,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:34:01,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:34:01,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:34:01,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:34:01,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:34:01,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:34:01,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:01,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:02,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178758947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:34:02,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:34:02,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-11-20 11:34:02,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447687652] [2022-11-20 11:34:02,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:34:02,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:34:02,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:34:02,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:34:02,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:34:02,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-11-20 11:34:02,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 506 transitions, 12168 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:02,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:34:02,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-11-20 11:34:02,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:34:08,086 INFO L130 PetriNetUnfolder]: 6918/16634 cut-off events. [2022-11-20 11:34:08,086 INFO L131 PetriNetUnfolder]: For 256861/257379 co-relation queries the response was YES. [2022-11-20 11:34:08,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103137 conditions, 16634 events. 6918/16634 cut-off events. For 256861/257379 co-relation queries the response was YES. Maximal size of possible extension queue 1254. Compared 178604 event pairs, 794 based on Foata normal form. 364/16649 useless extension candidates. Maximal degree in co-relation 103073. Up to 4217 conditions per place. [2022-11-20 11:34:08,323 INFO L137 encePairwiseOnDemand]: 84/97 looper letters, 728 selfloop transitions, 259 changer transitions 10/1089 dead transitions. [2022-11-20 11:34:08,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 1089 transitions, 26705 flow [2022-11-20 11:34:08,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:34:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-20 11:34:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1093 transitions. [2022-11-20 11:34:08,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7512027491408935 [2022-11-20 11:34:08,327 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1093 transitions. [2022-11-20 11:34:08,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1093 transitions. [2022-11-20 11:34:08,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:34:08,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1093 transitions. [2022-11-20 11:34:08,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.86666666666666) internal successors, (1093), 15 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:08,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:08,335 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:08,336 INFO L175 Difference]: Start difference. First operand has 204 places, 506 transitions, 12168 flow. Second operand 15 states and 1093 transitions. [2022-11-20 11:34:08,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 1089 transitions, 26705 flow [2022-11-20 11:34:09,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 1089 transitions, 25833 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-11-20 11:34:09,420 INFO L231 Difference]: Finished difference. Result has 223 places, 680 transitions, 16153 flow [2022-11-20 11:34:09,420 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=11693, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=16153, PETRI_PLACES=223, PETRI_TRANSITIONS=680} [2022-11-20 11:34:09,421 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 137 predicate places. [2022-11-20 11:34:09,421 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 680 transitions, 16153 flow [2022-11-20 11:34:09,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:09,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:34:09,422 INFO L209 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] [2022-11-20 11:34:09,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:09,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:09,629 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:34:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:09,629 INFO L85 PathProgramCache]: Analyzing trace with hash -194314738, now seen corresponding path program 11 times [2022-11-20 11:34:09,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:09,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165152498] [2022-11-20 11:34:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:09,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:09,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:09,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165152498] [2022-11-20 11:34:09,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165152498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:34:09,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:34:09,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:34:09,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364442223] [2022-11-20 11:34:09,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:34:09,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:34:09,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:34:09,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:34:09,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:34:09,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-20 11:34:09,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 680 transitions, 16153 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:09,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:34:09,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-20 11:34:09,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:34:15,117 INFO L130 PetriNetUnfolder]: 6823/16287 cut-off events. [2022-11-20 11:34:15,117 INFO L131 PetriNetUnfolder]: For 287208/287764 co-relation queries the response was YES. [2022-11-20 11:34:15,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109794 conditions, 16287 events. 6823/16287 cut-off events. For 287208/287764 co-relation queries the response was YES. Maximal size of possible extension queue 1253. Compared 174547 event pairs, 1461 based on Foata normal form. 124/16056 useless extension candidates. Maximal degree in co-relation 109722. Up to 10409 conditions per place. [2022-11-20 11:34:15,583 INFO L137 encePairwiseOnDemand]: 88/97 looper letters, 537 selfloop transitions, 65 changer transitions 7/707 dead transitions. [2022-11-20 11:34:15,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 707 transitions, 17699 flow [2022-11-20 11:34:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:34:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:34:15,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 471 transitions. [2022-11-20 11:34:15,585 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8092783505154639 [2022-11-20 11:34:15,585 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 471 transitions. [2022-11-20 11:34:15,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 471 transitions. [2022-11-20 11:34:15,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:34:15,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 471 transitions. [2022-11-20 11:34:15,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.5) internal successors, (471), 6 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:15,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:15,590 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:15,590 INFO L175 Difference]: Start difference. First operand has 223 places, 680 transitions, 16153 flow. Second operand 6 states and 471 transitions. [2022-11-20 11:34:15,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 707 transitions, 17699 flow [2022-11-20 11:34:16,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 707 transitions, 17589 flow, removed 54 selfloop flow, removed 3 redundant places. [2022-11-20 11:34:16,759 INFO L231 Difference]: Finished difference. Result has 225 places, 683 transitions, 16264 flow [2022-11-20 11:34:16,760 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16014, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=16264, PETRI_PLACES=225, PETRI_TRANSITIONS=683} [2022-11-20 11:34:16,760 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 139 predicate places. [2022-11-20 11:34:16,760 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 683 transitions, 16264 flow [2022-11-20 11:34:16,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:16,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:34:16,761 INFO L209 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] [2022-11-20 11:34:16,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 11:34:16,761 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:34:16,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:16,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1183273714, now seen corresponding path program 12 times [2022-11-20 11:34:16,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:16,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384816876] [2022-11-20 11:34:16,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:16,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:17,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:17,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384816876] [2022-11-20 11:34:17,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384816876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:34:17,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:34:17,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:34:17,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525366735] [2022-11-20 11:34:17,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:34:17,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:34:17,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:34:17,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:34:17,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:34:17,018 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-20 11:34:17,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 683 transitions, 16264 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:17,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:34:17,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-20 11:34:17,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:34:21,945 INFO L130 PetriNetUnfolder]: 6970/16709 cut-off events. [2022-11-20 11:34:21,946 INFO L131 PetriNetUnfolder]: For 301006/301565 co-relation queries the response was YES. [2022-11-20 11:34:22,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113750 conditions, 16709 events. 6970/16709 cut-off events. For 301006/301565 co-relation queries the response was YES. Maximal size of possible extension queue 1286. Compared 180242 event pairs, 1590 based on Foata normal form. 124/16437 useless extension candidates. Maximal degree in co-relation 113677. Up to 10377 conditions per place. [2022-11-20 11:34:22,473 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 598 selfloop transitions, 77 changer transitions 10/783 dead transitions. [2022-11-20 11:34:22,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 783 transitions, 19782 flow [2022-11-20 11:34:22,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:34:22,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:34:22,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 482 transitions. [2022-11-20 11:34:22,476 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8281786941580757 [2022-11-20 11:34:22,476 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 482 transitions. [2022-11-20 11:34:22,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 482 transitions. [2022-11-20 11:34:22,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:34:22,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 482 transitions. [2022-11-20 11:34:22,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.33333333333333) internal successors, (482), 6 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:22,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:22,480 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:22,481 INFO L175 Difference]: Start difference. First operand has 225 places, 683 transitions, 16264 flow. Second operand 6 states and 482 transitions. [2022-11-20 11:34:22,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 783 transitions, 19782 flow [2022-11-20 11:34:23,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 783 transitions, 19414 flow, removed 34 selfloop flow, removed 8 redundant places. [2022-11-20 11:34:23,662 INFO L231 Difference]: Finished difference. Result has 223 places, 682 transitions, 16060 flow [2022-11-20 11:34:23,663 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=15574, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=16060, PETRI_PLACES=223, PETRI_TRANSITIONS=682} [2022-11-20 11:34:23,663 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 137 predicate places. [2022-11-20 11:34:23,664 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 682 transitions, 16060 flow [2022-11-20 11:34:23,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:23,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:34:23,664 INFO L209 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] [2022-11-20 11:34:23,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 11:34:23,665 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:34:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:23,665 INFO L85 PathProgramCache]: Analyzing trace with hash -468625304, now seen corresponding path program 1 times [2022-11-20 11:34:23,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:23,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15946104] [2022-11-20 11:34:23,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:23,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:24,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:24,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15946104] [2022-11-20 11:34:24,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15946104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:24,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418771575] [2022-11-20 11:34:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:24,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:24,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:34:24,117 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:34:24,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:34:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:24,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:34:24,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:24,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:25,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418771575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:34:25,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:34:25,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-11-20 11:34:25,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263923940] [2022-11-20 11:34:25,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:34:25,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:34:25,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:34:25,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:34:25,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:34:25,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-11-20 11:34:25,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 682 transitions, 16060 flow. Second operand has 17 states, 17 states have (on average 67.29411764705883) internal successors, (1144), 17 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:25,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:34:25,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-11-20 11:34:25,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:34:32,578 INFO L130 PetriNetUnfolder]: 7225/19721 cut-off events. [2022-11-20 11:34:32,579 INFO L131 PetriNetUnfolder]: For 354829/355916 co-relation queries the response was YES. [2022-11-20 11:34:32,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131171 conditions, 19721 events. 7225/19721 cut-off events. For 354829/355916 co-relation queries the response was YES. Maximal size of possible extension queue 1521. Compared 231725 event pairs, 487 based on Foata normal form. 333/19646 useless extension candidates. Maximal degree in co-relation 131099. Up to 6686 conditions per place. [2022-11-20 11:34:32,942 INFO L137 encePairwiseOnDemand]: 84/97 looper letters, 673 selfloop transitions, 423 changer transitions 7/1219 dead transitions. [2022-11-20 11:34:32,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 1219 transitions, 30962 flow [2022-11-20 11:34:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:34:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-20 11:34:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1005 transitions. [2022-11-20 11:34:32,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.740058910162003 [2022-11-20 11:34:32,945 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1005 transitions. [2022-11-20 11:34:32,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1005 transitions. [2022-11-20 11:34:32,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:34:32,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1005 transitions. [2022-11-20 11:34:32,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 71.78571428571429) internal successors, (1005), 14 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:32,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 97.0) internal successors, (1455), 15 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:32,952 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 97.0) internal successors, (1455), 15 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:32,952 INFO L175 Difference]: Start difference. First operand has 223 places, 682 transitions, 16060 flow. Second operand 14 states and 1005 transitions. [2022-11-20 11:34:32,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 1219 transitions, 30962 flow [2022-11-20 11:34:34,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 1219 transitions, 30660 flow, removed 18 selfloop flow, removed 12 redundant places. [2022-11-20 11:34:34,639 INFO L231 Difference]: Finished difference. Result has 226 places, 908 transitions, 21542 flow [2022-11-20 11:34:34,640 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=15758, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21542, PETRI_PLACES=226, PETRI_TRANSITIONS=908} [2022-11-20 11:34:34,641 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 140 predicate places. [2022-11-20 11:34:34,641 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 908 transitions, 21542 flow [2022-11-20 11:34:34,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 67.29411764705883) internal successors, (1144), 17 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:34,642 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:34:34,642 INFO L209 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] [2022-11-20 11:34:34,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:34,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 11:34:34,845 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:34:34,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1086034900, now seen corresponding path program 2 times [2022-11-20 11:34:34,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:34,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501685348] [2022-11-20 11:34:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:34,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:35,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:35,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501685348] [2022-11-20 11:34:35,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501685348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:35,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536368937] [2022-11-20 11:34:35,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:34:35,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:35,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:34:35,262 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:34:35,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:34:35,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:34:35,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:34:35,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:34:35,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:35,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:36,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536368937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:34:36,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:34:36,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-11-20 11:34:36,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726596950] [2022-11-20 11:34:36,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:34:36,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:34:36,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:34:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:34:36,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:34:36,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-11-20 11:34:36,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 908 transitions, 21542 flow. Second operand has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:36,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:34:36,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-11-20 11:34:36,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:34:44,986 INFO L130 PetriNetUnfolder]: 9457/24536 cut-off events. [2022-11-20 11:34:44,986 INFO L131 PetriNetUnfolder]: For 494620/495130 co-relation queries the response was YES. [2022-11-20 11:34:45,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175649 conditions, 24536 events. 9457/24536 cut-off events. For 494620/495130 co-relation queries the response was YES. Maximal size of possible extension queue 2011. Compared 292121 event pairs, 836 based on Foata normal form. 110/24270 useless extension candidates. Maximal degree in co-relation 175578. Up to 11243 conditions per place. [2022-11-20 11:34:45,391 INFO L137 encePairwiseOnDemand]: 82/97 looper letters, 892 selfloop transitions, 497 changer transitions 11/1473 dead transitions. [2022-11-20 11:34:45,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 1473 transitions, 37939 flow [2022-11-20 11:34:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:34:45,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 11:34:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1239 transitions. [2022-11-20 11:34:45,394 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7096219931271478 [2022-11-20 11:34:45,394 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1239 transitions. [2022-11-20 11:34:45,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1239 transitions. [2022-11-20 11:34:45,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:34:45,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1239 transitions. [2022-11-20 11:34:45,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 68.83333333333333) internal successors, (1239), 18 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:45,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 97.0) internal successors, (1843), 19 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:45,402 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 97.0) internal successors, (1843), 19 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:45,403 INFO L175 Difference]: Start difference. First operand has 226 places, 908 transitions, 21542 flow. Second operand 18 states and 1239 transitions. [2022-11-20 11:34:45,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 1473 transitions, 37939 flow [2022-11-20 11:34:48,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 1473 transitions, 37314 flow, removed 278 selfloop flow, removed 4 redundant places. [2022-11-20 11:34:48,903 INFO L231 Difference]: Finished difference. Result has 244 places, 1096 transitions, 27133 flow [2022-11-20 11:34:48,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=21023, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=27133, PETRI_PLACES=244, PETRI_TRANSITIONS=1096} [2022-11-20 11:34:48,905 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 158 predicate places. [2022-11-20 11:34:48,906 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 1096 transitions, 27133 flow [2022-11-20 11:34:48,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:48,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:34:48,907 INFO L209 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] [2022-11-20 11:34:48,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:49,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:49,115 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:34:49,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:49,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1214034222, now seen corresponding path program 3 times [2022-11-20 11:34:49,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:49,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862495963] [2022-11-20 11:34:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:49,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:49,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:49,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862495963] [2022-11-20 11:34:49,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862495963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:49,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282234407] [2022-11-20 11:34:49,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:34:49,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:49,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:34:49,587 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:34:49,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aab7f456-81ab-44bb-bd09-cde66a091d0c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:34:49,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:34:49,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:34:49,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:34:49,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:50,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:34:50,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282234407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:34:50,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:34:50,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-11-20 11:34:50,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660022403] [2022-11-20 11:34:50,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:34:50,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:34:50,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:34:50,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:34:50,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:34:50,598 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-11-20 11:34:50,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 1096 transitions, 27133 flow. Second operand has 17 states, 17 states have (on average 65.76470588235294) internal successors, (1118), 17 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:50,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:34:50,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-11-20 11:34:50,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand