./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8 --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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --- 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-e04fb08 [2022-11-16 11:05:40,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:05:40,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:05:40,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:05:40,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:05:40,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:05:40,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:05:40,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:05:40,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:05:40,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:05:40,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:05:40,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:05:40,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:05:40,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:05:40,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:05:40,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:05:40,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:05:40,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:05:40,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:05:40,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:05:40,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:05:40,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:05:40,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:05:40,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:05:40,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:05:40,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:05:40,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:05:40,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:05:40,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:05:40,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:05:40,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:05:40,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:05:40,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:05:40,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:05:40,182 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:05:40,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:05:40,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:05:40,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:05:40,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:05:40,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:05:40,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:05:40,189 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:05:40,236 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:05:40,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:05:40,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:05:40,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:05:40,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:05:40,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:05:40,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:05:40,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:05:40,240 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:05:40,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:05:40,241 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:05:40,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:05:40,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:05:40,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:05:40,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:05:40,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:05:40,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:05:40,243 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:05:40,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:05:40,243 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:05:40,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:05:40,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:05:40,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:05:40,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:05:40,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:05:40,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:05:40,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:05:40,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:05:40,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:05:40,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:05:40,248 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:05:40,248 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:05:40,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:05:40,249 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_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 [2022-11-16 11:05:40,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:05:40,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:05:40,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:05:40,598 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:05:40,599 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:05:40,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-11-16 11:05:40,695 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/data/1620d45ba/026e5da0335f443aaa550cfb5ac7a8ae/FLAG7244f9763 [2022-11-16 11:05:41,357 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:05:41,358 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-11-16 11:05:41,370 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/data/1620d45ba/026e5da0335f443aaa550cfb5ac7a8ae/FLAG7244f9763 [2022-11-16 11:05:41,697 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/data/1620d45ba/026e5da0335f443aaa550cfb5ac7a8ae [2022-11-16 11:05:41,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:05:41,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:05:41,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:05:41,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:05:41,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:05:41,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:05:41" (1/1) ... [2022-11-16 11:05:41,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f2f9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:41, skipping insertion in model container [2022-11-16 11:05:41,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:05:41" (1/1) ... [2022-11-16 11:05:41,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:05:41,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:05:42,008 WARN L229 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_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-11-16 11:05:42,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:05:42,043 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:05:42,094 WARN L229 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_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-11-16 11:05:42,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:05:42,120 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:05:42,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:42 WrapperNode [2022-11-16 11:05:42,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:05:42,122 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:05:42,122 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:05:42,122 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:05:42,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:42" (1/1) ... [2022-11-16 11:05:42,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:42" (1/1) ... [2022-11-16 11:05:42,181 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2022-11-16 11:05:42,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:05:42,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:05:42,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:05:42,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:05:42,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:42" (1/1) ... [2022-11-16 11:05:42,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:42" (1/1) ... [2022-11-16 11:05:42,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:42" (1/1) ... [2022-11-16 11:05:42,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:42" (1/1) ... [2022-11-16 11:05:42,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:42" (1/1) ... [2022-11-16 11:05:42,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:42" (1/1) ... [2022-11-16 11:05:42,243 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:42" (1/1) ... [2022-11-16 11:05:42,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:42" (1/1) ... [2022-11-16 11:05:42,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:05:42,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:05:42,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:05:42,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:05:42,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:42" (1/1) ... [2022-11-16 11:05:42,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:05:42,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:42,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:05:42,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:05:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:05:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:05:42,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:05:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:05:42,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:05:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:05:42,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:05:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:05:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:05:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:05:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:05:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:05:42,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:05:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:05:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:05:42,378 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:05:42,577 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:05:42,580 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:05:43,127 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:05:43,138 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:05:43,142 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:05:43,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:05:43 BoogieIcfgContainer [2022-11-16 11:05:43,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:05:43,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:05:43,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:05:43,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:05:43,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:05:41" (1/3) ... [2022-11-16 11:05:43,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485eca16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:05:43, skipping insertion in model container [2022-11-16 11:05:43,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:42" (2/3) ... [2022-11-16 11:05:43,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485eca16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:05:43, skipping insertion in model container [2022-11-16 11:05:43,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:05:43" (3/3) ... [2022-11-16 11:05:43,160 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2022-11-16 11:05:43,170 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:05:43,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:05:43,184 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:05:43,184 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:05:43,354 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 11:05:43,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 184 transitions, 392 flow [2022-11-16 11:05:43,570 INFO L130 PetriNetUnfolder]: 15/181 cut-off events. [2022-11-16 11:05:43,571 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:05:43,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 181 events. 15/181 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 192 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-11-16 11:05:43,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 184 transitions, 392 flow [2022-11-16 11:05:43,586 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 170 transitions, 358 flow [2022-11-16 11:05:43,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:05:43,606 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;@4eef7c5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:05:43,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-16 11:05:43,654 INFO L130 PetriNetUnfolder]: 15/169 cut-off events. [2022-11-16 11:05:43,654 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:05:43,654 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:43,655 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:43,656 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)] === [2022-11-16 11:05:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:43,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1546474655, now seen corresponding path program 1 times [2022-11-16 11:05:43,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:43,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389683798] [2022-11-16 11:05:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:43,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:44,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:44,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389683798] [2022-11-16 11:05:44,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389683798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:05:44,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:05:44,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:05:44,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316213406] [2022-11-16 11:05:44,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:44,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:05:44,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:44,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:05:44,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:05:44,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 184 [2022-11-16 11:05:44,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 170 transitions, 358 flow. Second operand has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:44,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:44,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 184 [2022-11-16 11:05:44,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:44,374 INFO L130 PetriNetUnfolder]: 7/162 cut-off events. [2022-11-16 11:05:44,374 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-16 11:05:44,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 162 events. 7/162 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 182 event pairs, 0 based on Foata normal form. 14/165 useless extension candidates. Maximal degree in co-relation 130. Up to 7 conditions per place. [2022-11-16 11:05:44,381 INFO L137 encePairwiseOnDemand]: 176/184 looper letters, 6 selfloop transitions, 0 changer transitions 4/162 dead transitions. [2022-11-16 11:05:44,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 162 transitions, 354 flow [2022-11-16 11:05:44,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:05:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:05:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 352 transitions. [2022-11-16 11:05:44,412 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9565217391304348 [2022-11-16 11:05:44,413 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 352 transitions. [2022-11-16 11:05:44,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 352 transitions. [2022-11-16 11:05:44,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:44,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 352 transitions. [2022-11-16 11:05:44,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 176.0) internal successors, (352), 2 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:44,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:44,439 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:44,441 INFO L175 Difference]: Start difference. First operand has 165 places, 170 transitions, 358 flow. Second operand 2 states and 352 transitions. [2022-11-16 11:05:44,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 162 transitions, 354 flow [2022-11-16 11:05:44,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 162 transitions, 342 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 11:05:44,453 INFO L231 Difference]: Finished difference. Result has 160 places, 158 transitions, 322 flow [2022-11-16 11:05:44,455 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=322, PETRI_PLACES=160, PETRI_TRANSITIONS=158} [2022-11-16 11:05:44,460 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, -5 predicate places. [2022-11-16 11:05:44,461 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 158 transitions, 322 flow [2022-11-16 11:05:44,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:44,463 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:44,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:44,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:05:44,465 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)] === [2022-11-16 11:05:44,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash 542375553, now seen corresponding path program 1 times [2022-11-16 11:05:44,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:44,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735768441] [2022-11-16 11:05:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:44,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:45,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:45,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735768441] [2022-11-16 11:05:45,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735768441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:05:45,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:05:45,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 11:05:45,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162790547] [2022-11-16 11:05:45,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:45,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:05:45,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:45,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:05:45,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:05:45,463 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 184 [2022-11-16 11:05:45,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 158 transitions, 322 flow. Second operand has 8 states, 8 states have (on average 132.5) internal successors, (1060), 8 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:45,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:45,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 184 [2022-11-16 11:05:45,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:45,815 INFO L130 PetriNetUnfolder]: 175/665 cut-off events. [2022-11-16 11:05:45,816 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-16 11:05:45,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 665 events. 175/665 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3322 event pairs, 74 based on Foata normal form. 1/527 useless extension candidates. Maximal degree in co-relation 917. Up to 225 conditions per place. [2022-11-16 11:05:45,825 INFO L137 encePairwiseOnDemand]: 174/184 looper letters, 41 selfloop transitions, 6 changer transitions 4/166 dead transitions. [2022-11-16 11:05:45,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 166 transitions, 440 flow [2022-11-16 11:05:45,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:05:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:05:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1076 transitions. [2022-11-16 11:05:45,830 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7309782608695652 [2022-11-16 11:05:45,830 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1076 transitions. [2022-11-16 11:05:45,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1076 transitions. [2022-11-16 11:05:45,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:45,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1076 transitions. [2022-11-16 11:05:45,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 134.5) internal successors, (1076), 8 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:45,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 184.0) internal successors, (1656), 9 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:45,841 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 184.0) internal successors, (1656), 9 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:45,841 INFO L175 Difference]: Start difference. First operand has 160 places, 158 transitions, 322 flow. Second operand 8 states and 1076 transitions. [2022-11-16 11:05:45,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 166 transitions, 440 flow [2022-11-16 11:05:45,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 440 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:05:45,846 INFO L231 Difference]: Finished difference. Result has 167 places, 159 transitions, 350 flow [2022-11-16 11:05:45,847 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=350, PETRI_PLACES=167, PETRI_TRANSITIONS=159} [2022-11-16 11:05:45,848 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 2 predicate places. [2022-11-16 11:05:45,848 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 159 transitions, 350 flow [2022-11-16 11:05:45,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.5) internal successors, (1060), 8 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:45,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:45,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:45,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:05:45,851 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)] === [2022-11-16 11:05:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:45,852 INFO L85 PathProgramCache]: Analyzing trace with hash -730941901, now seen corresponding path program 1 times [2022-11-16 11:05:45,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:45,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224378354] [2022-11-16 11:05:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:45,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:05:46,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:46,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224378354] [2022-11-16 11:05:46,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224378354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:05:46,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:05:46,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:05:46,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898759882] [2022-11-16 11:05:46,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:46,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:05:46,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:46,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:05:46,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:05:46,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 184 [2022-11-16 11:05:46,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 159 transitions, 350 flow. Second operand has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:46,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:46,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 184 [2022-11-16 11:05:46,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:47,073 INFO L130 PetriNetUnfolder]: 224/1098 cut-off events. [2022-11-16 11:05:47,073 INFO L131 PetriNetUnfolder]: For 45/46 co-relation queries the response was YES. [2022-11-16 11:05:47,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 1098 events. 224/1098 cut-off events. For 45/46 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7286 event pairs, 34 based on Foata normal form. 1/988 useless extension candidates. Maximal degree in co-relation 1450. Up to 149 conditions per place. [2022-11-16 11:05:47,086 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 62 selfloop transitions, 9 changer transitions 4/200 dead transitions. [2022-11-16 11:05:47,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 200 transitions, 594 flow [2022-11-16 11:05:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:05:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:05:47,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1035 transitions. [2022-11-16 11:05:47,092 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8035714285714286 [2022-11-16 11:05:47,092 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1035 transitions. [2022-11-16 11:05:47,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1035 transitions. [2022-11-16 11:05:47,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:47,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1035 transitions. [2022-11-16 11:05:47,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.85714285714286) internal successors, (1035), 7 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:47,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 184.0) internal successors, (1472), 8 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:47,103 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 184.0) internal successors, (1472), 8 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:47,104 INFO L175 Difference]: Start difference. First operand has 167 places, 159 transitions, 350 flow. Second operand 7 states and 1035 transitions. [2022-11-16 11:05:47,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 200 transitions, 594 flow [2022-11-16 11:05:47,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 200 transitions, 576 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-16 11:05:47,112 INFO L231 Difference]: Finished difference. Result has 168 places, 165 transitions, 385 flow [2022-11-16 11:05:47,113 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=385, PETRI_PLACES=168, PETRI_TRANSITIONS=165} [2022-11-16 11:05:47,116 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 3 predicate places. [2022-11-16 11:05:47,116 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 165 transitions, 385 flow [2022-11-16 11:05:47,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:47,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:47,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:47,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:05:47,118 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)] === [2022-11-16 11:05:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:47,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1785722789, now seen corresponding path program 1 times [2022-11-16 11:05:47,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:47,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764802683] [2022-11-16 11:05:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:47,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:47,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:47,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764802683] [2022-11-16 11:05:47,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764802683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:47,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468817101] [2022-11-16 11:05:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:47,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:47,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:47,512 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:47,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:05:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:47,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:05:47,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:47,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:48,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468817101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:48,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:48,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-16 11:05:48,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180919230] [2022-11-16 11:05:48,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:48,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:05:48,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:48,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:05:48,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:05:48,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 184 [2022-11-16 11:05:48,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 165 transitions, 385 flow. Second operand has 19 states, 19 states have (on average 146.73684210526315) internal successors, (2788), 19 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:48,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:48,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 184 [2022-11-16 11:05:48,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:49,008 INFO L130 PetriNetUnfolder]: 270/1248 cut-off events. [2022-11-16 11:05:49,008 INFO L131 PetriNetUnfolder]: For 81/90 co-relation queries the response was YES. [2022-11-16 11:05:49,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 1248 events. 270/1248 cut-off events. For 81/90 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8252 event pairs, 103 based on Foata normal form. 0/1059 useless extension candidates. Maximal degree in co-relation 1815. Up to 188 conditions per place. [2022-11-16 11:05:49,025 INFO L137 encePairwiseOnDemand]: 171/184 looper letters, 46 selfloop transitions, 14 changer transitions 0/193 dead transitions. [2022-11-16 11:05:49,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 193 transitions, 575 flow [2022-11-16 11:05:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:05:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:05:49,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1933 transitions. [2022-11-16 11:05:49,033 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8081103678929766 [2022-11-16 11:05:49,033 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1933 transitions. [2022-11-16 11:05:49,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1933 transitions. [2022-11-16 11:05:49,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:49,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1933 transitions. [2022-11-16 11:05:49,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 148.69230769230768) internal successors, (1933), 13 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:49,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:49,047 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:49,047 INFO L175 Difference]: Start difference. First operand has 168 places, 165 transitions, 385 flow. Second operand 13 states and 1933 transitions. [2022-11-16 11:05:49,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 193 transitions, 575 flow [2022-11-16 11:05:49,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 193 transitions, 571 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-16 11:05:49,055 INFO L231 Difference]: Finished difference. Result has 182 places, 172 transitions, 457 flow [2022-11-16 11:05:49,055 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=457, PETRI_PLACES=182, PETRI_TRANSITIONS=172} [2022-11-16 11:05:49,057 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 17 predicate places. [2022-11-16 11:05:49,057 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 172 transitions, 457 flow [2022-11-16 11:05:49,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 146.73684210526315) internal successors, (2788), 19 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:49,059 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:49,060 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:49,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:05:49,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:49,266 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)] === [2022-11-16 11:05:49,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:49,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1381296401, now seen corresponding path program 1 times [2022-11-16 11:05:49,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:49,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486006828] [2022-11-16 11:05:49,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:49,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:05:49,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:49,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486006828] [2022-11-16 11:05:49,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486006828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:05:49,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:05:49,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:05:49,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006778237] [2022-11-16 11:05:49,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:49,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:05:49,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:49,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:05:49,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:05:49,416 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 184 [2022-11-16 11:05:49,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 172 transitions, 457 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:49,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:49,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 184 [2022-11-16 11:05:49,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:49,614 INFO L130 PetriNetUnfolder]: 106/711 cut-off events. [2022-11-16 11:05:49,614 INFO L131 PetriNetUnfolder]: For 94/116 co-relation queries the response was YES. [2022-11-16 11:05:49,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 711 events. 106/711 cut-off events. For 94/116 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3852 event pairs, 7 based on Foata normal form. 7/658 useless extension candidates. Maximal degree in co-relation 1056. Up to 104 conditions per place. [2022-11-16 11:05:49,624 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 22 selfloop transitions, 8 changer transitions 0/185 dead transitions. [2022-11-16 11:05:49,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 185 transitions, 557 flow [2022-11-16 11:05:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:05:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:05:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 829 transitions. [2022-11-16 11:05:49,628 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9010869565217391 [2022-11-16 11:05:49,628 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 829 transitions. [2022-11-16 11:05:49,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 829 transitions. [2022-11-16 11:05:49,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:49,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 829 transitions. [2022-11-16 11:05:49,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.8) internal successors, (829), 5 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:49,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:49,649 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:49,650 INFO L175 Difference]: Start difference. First operand has 182 places, 172 transitions, 457 flow. Second operand 5 states and 829 transitions. [2022-11-16 11:05:49,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 185 transitions, 557 flow [2022-11-16 11:05:49,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 185 transitions, 542 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-16 11:05:49,657 INFO L231 Difference]: Finished difference. Result has 185 places, 176 transitions, 492 flow [2022-11-16 11:05:49,658 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=492, PETRI_PLACES=185, PETRI_TRANSITIONS=176} [2022-11-16 11:05:49,660 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 20 predicate places. [2022-11-16 11:05:49,661 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 176 transitions, 492 flow [2022-11-16 11:05:49,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:49,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:49,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:49,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:05:49,662 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)] === [2022-11-16 11:05:49,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:49,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1992931229, now seen corresponding path program 1 times [2022-11-16 11:05:49,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:49,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577620984] [2022-11-16 11:05:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:49,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:05:49,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:49,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577620984] [2022-11-16 11:05:49,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577620984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:05:49,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:05:49,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:05:49,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652971554] [2022-11-16 11:05:49,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:49,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:05:49,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:49,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:05:49,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:05:49,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 184 [2022-11-16 11:05:49,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 176 transitions, 492 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:49,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:49,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 184 [2022-11-16 11:05:49,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:50,088 INFO L130 PetriNetUnfolder]: 142/851 cut-off events. [2022-11-16 11:05:50,089 INFO L131 PetriNetUnfolder]: For 216/254 co-relation queries the response was YES. [2022-11-16 11:05:50,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1345 conditions, 851 events. 142/851 cut-off events. For 216/254 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5136 event pairs, 11 based on Foata normal form. 3/792 useless extension candidates. Maximal degree in co-relation 1329. Up to 158 conditions per place. [2022-11-16 11:05:50,099 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 21 selfloop transitions, 7 changer transitions 0/188 dead transitions. [2022-11-16 11:05:50,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 188 transitions, 583 flow [2022-11-16 11:05:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:05:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:05:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 828 transitions. [2022-11-16 11:05:50,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-11-16 11:05:50,102 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 828 transitions. [2022-11-16 11:05:50,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 828 transitions. [2022-11-16 11:05:50,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:50,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 828 transitions. [2022-11-16 11:05:50,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.6) internal successors, (828), 5 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:50,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:50,110 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:50,110 INFO L175 Difference]: Start difference. First operand has 185 places, 176 transitions, 492 flow. Second operand 5 states and 828 transitions. [2022-11-16 11:05:50,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 188 transitions, 583 flow [2022-11-16 11:05:50,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 188 transitions, 583 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:05:50,132 INFO L231 Difference]: Finished difference. Result has 192 places, 180 transitions, 536 flow [2022-11-16 11:05:50,132 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=192, PETRI_TRANSITIONS=180} [2022-11-16 11:05:50,135 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 27 predicate places. [2022-11-16 11:05:50,135 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 180 transitions, 536 flow [2022-11-16 11:05:50,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:50,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:50,136 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:50,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:05:50,137 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)] === [2022-11-16 11:05:50,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:50,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1730974201, now seen corresponding path program 1 times [2022-11-16 11:05:50,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:50,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749730828] [2022-11-16 11:05:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:50,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:50,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:50,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749730828] [2022-11-16 11:05:50,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749730828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:50,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591793239] [2022-11-16 11:05:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:50,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:50,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:50,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:50,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:05:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:50,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:05:50,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:51,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:52,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591793239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:52,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:52,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-11-16 11:05:52,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737770658] [2022-11-16 11:05:52,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:52,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:05:52,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:52,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:05:52,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:05:52,029 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 184 [2022-11-16 11:05:52,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 180 transitions, 536 flow. Second operand has 31 states, 31 states have (on average 125.45161290322581) internal successors, (3889), 31 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:52,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:52,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 184 [2022-11-16 11:05:52,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:54,637 INFO L130 PetriNetUnfolder]: 1389/4440 cut-off events. [2022-11-16 11:05:54,637 INFO L131 PetriNetUnfolder]: For 1388/1450 co-relation queries the response was YES. [2022-11-16 11:05:54,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8834 conditions, 4440 events. 1389/4440 cut-off events. For 1388/1450 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 40310 event pairs, 871 based on Foata normal form. 33/3994 useless extension candidates. Maximal degree in co-relation 8815. Up to 1413 conditions per place. [2022-11-16 11:05:54,702 INFO L137 encePairwiseOnDemand]: 164/184 looper letters, 71 selfloop transitions, 21 changer transitions 0/216 dead transitions. [2022-11-16 11:05:54,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 216 transitions, 815 flow [2022-11-16 11:05:54,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:05:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 11:05:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2411 transitions. [2022-11-16 11:05:54,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6896453089244852 [2022-11-16 11:05:54,712 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2411 transitions. [2022-11-16 11:05:54,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2411 transitions. [2022-11-16 11:05:54,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:54,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2411 transitions. [2022-11-16 11:05:54,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 126.89473684210526) internal successors, (2411), 19 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:54,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 184.0) internal successors, (3680), 20 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:54,732 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 184.0) internal successors, (3680), 20 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:54,733 INFO L175 Difference]: Start difference. First operand has 192 places, 180 transitions, 536 flow. Second operand 19 states and 2411 transitions. [2022-11-16 11:05:54,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 216 transitions, 815 flow [2022-11-16 11:05:54,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 216 transitions, 815 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:05:54,748 INFO L231 Difference]: Finished difference. Result has 217 places, 187 transitions, 627 flow [2022-11-16 11:05:54,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=627, PETRI_PLACES=217, PETRI_TRANSITIONS=187} [2022-11-16 11:05:54,750 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 52 predicate places. [2022-11-16 11:05:54,750 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 187 transitions, 627 flow [2022-11-16 11:05:54,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 125.45161290322581) internal successors, (3889), 31 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:54,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:54,753 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:54,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:05:54,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 11:05:54,960 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)] === [2022-11-16 11:05:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:54,960 INFO L85 PathProgramCache]: Analyzing trace with hash 332117874, now seen corresponding path program 1 times [2022-11-16 11:05:54,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:54,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868087837] [2022-11-16 11:05:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:54,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:55,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:55,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868087837] [2022-11-16 11:05:55,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868087837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:55,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874088074] [2022-11-16 11:05:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:55,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:55,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:55,567 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:55,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:05:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:55,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:05:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:56,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:56,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874088074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:56,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:56,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-11-16 11:05:56,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140406071] [2022-11-16 11:05:56,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:56,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:05:56,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:05:56,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:05:56,933 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 184 [2022-11-16 11:05:56,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 187 transitions, 627 flow. Second operand has 31 states, 31 states have (on average 126.41935483870968) internal successors, (3919), 31 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:56,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:56,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 184 [2022-11-16 11:05:56,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:58,797 INFO L130 PetriNetUnfolder]: 1000/2883 cut-off events. [2022-11-16 11:05:58,798 INFO L131 PetriNetUnfolder]: For 1379/1436 co-relation queries the response was YES. [2022-11-16 11:05:58,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6545 conditions, 2883 events. 1000/2883 cut-off events. For 1379/1436 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 23388 event pairs, 690 based on Foata normal form. 23/2631 useless extension candidates. Maximal degree in co-relation 6518. Up to 1174 conditions per place. [2022-11-16 11:05:58,845 INFO L137 encePairwiseOnDemand]: 167/184 looper letters, 50 selfloop transitions, 13 changer transitions 21/208 dead transitions. [2022-11-16 11:05:58,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 208 transitions, 853 flow [2022-11-16 11:05:58,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:05:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-16 11:05:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2174 transitions. [2022-11-16 11:05:58,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6950127877237852 [2022-11-16 11:05:58,854 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2174 transitions. [2022-11-16 11:05:58,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2174 transitions. [2022-11-16 11:05:58,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:58,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2174 transitions. [2022-11-16 11:05:58,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 127.88235294117646) internal successors, (2174), 17 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:58,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 184.0) internal successors, (3312), 18 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:58,874 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 184.0) internal successors, (3312), 18 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:58,874 INFO L175 Difference]: Start difference. First operand has 217 places, 187 transitions, 627 flow. Second operand 17 states and 2174 transitions. [2022-11-16 11:05:58,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 208 transitions, 853 flow [2022-11-16 11:05:58,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 208 transitions, 827 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-11-16 11:05:58,886 INFO L231 Difference]: Finished difference. Result has 223 places, 177 transitions, 573 flow [2022-11-16 11:05:58,886 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=573, PETRI_PLACES=223, PETRI_TRANSITIONS=177} [2022-11-16 11:05:58,887 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 58 predicate places. [2022-11-16 11:05:58,887 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 177 transitions, 573 flow [2022-11-16 11:05:58,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 126.41935483870968) internal successors, (3919), 31 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:58,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:58,890 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:58,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:59,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:59,096 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)] === [2022-11-16 11:05:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:59,097 INFO L85 PathProgramCache]: Analyzing trace with hash 872581959, now seen corresponding path program 2 times [2022-11-16 11:05:59,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:59,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929512272] [2022-11-16 11:05:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:59,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:05:59,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:59,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929512272] [2022-11-16 11:05:59,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929512272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:59,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252983846] [2022-11-16 11:05:59,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:05:59,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:59,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:59,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:59,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:05:59,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:05:59,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:05:59,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:00,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:00,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252983846] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:00,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:06:00,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 23 [2022-11-16 11:06:00,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433336164] [2022-11-16 11:06:00,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:00,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:06:00,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:00,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:06:00,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:06:00,603 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-11-16 11:06:00,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 177 transitions, 573 flow. Second operand has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:00,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:00,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-11-16 11:06:00,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:02,614 INFO L130 PetriNetUnfolder]: 2643/6400 cut-off events. [2022-11-16 11:06:02,614 INFO L131 PetriNetUnfolder]: For 2904/2917 co-relation queries the response was YES. [2022-11-16 11:06:02,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14736 conditions, 6400 events. 2643/6400 cut-off events. For 2904/2917 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 57853 event pairs, 617 based on Foata normal form. 13/6193 useless extension candidates. Maximal degree in co-relation 14708. Up to 1153 conditions per place. [2022-11-16 11:06:02,717 INFO L137 encePairwiseOnDemand]: 170/184 looper letters, 82 selfloop transitions, 20 changer transitions 0/234 dead transitions. [2022-11-16 11:06:02,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 234 transitions, 960 flow [2022-11-16 11:06:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:06:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 11:06:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1992 transitions. [2022-11-16 11:06:02,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7732919254658385 [2022-11-16 11:06:02,724 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1992 transitions. [2022-11-16 11:06:02,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1992 transitions. [2022-11-16 11:06:02,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:02,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1992 transitions. [2022-11-16 11:06:02,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 142.28571428571428) internal successors, (1992), 14 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:02,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:02,740 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:02,740 INFO L175 Difference]: Start difference. First operand has 223 places, 177 transitions, 573 flow. Second operand 14 states and 1992 transitions. [2022-11-16 11:06:02,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 234 transitions, 960 flow [2022-11-16 11:06:02,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 234 transitions, 886 flow, removed 23 selfloop flow, removed 19 redundant places. [2022-11-16 11:06:02,782 INFO L231 Difference]: Finished difference. Result has 210 places, 189 transitions, 636 flow [2022-11-16 11:06:02,782 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=636, PETRI_PLACES=210, PETRI_TRANSITIONS=189} [2022-11-16 11:06:02,783 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 45 predicate places. [2022-11-16 11:06:02,783 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 189 transitions, 636 flow [2022-11-16 11:06:02,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:02,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:02,786 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:02,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:02,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 11:06:02,992 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)] === [2022-11-16 11:06:02,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:02,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2135314175, now seen corresponding path program 3 times [2022-11-16 11:06:02,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:02,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383684941] [2022-11-16 11:06:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:02,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:03,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:03,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383684941] [2022-11-16 11:06:03,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383684941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:03,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037550969] [2022-11-16 11:06:03,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:03,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:03,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:03,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:03,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:06:03,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:06:03,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:03,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:06:03,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:06:03,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:06:04,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037550969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:04,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:04,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 18 [2022-11-16 11:06:04,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961503050] [2022-11-16 11:06:04,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:04,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:06:04,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:04,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:06:04,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:06:04,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 184 [2022-11-16 11:06:04,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 189 transitions, 636 flow. Second operand has 18 states, 18 states have (on average 133.77777777777777) internal successors, (2408), 18 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:04,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:04,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 184 [2022-11-16 11:06:04,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:09,431 INFO L130 PetriNetUnfolder]: 8766/20056 cut-off events. [2022-11-16 11:06:09,432 INFO L131 PetriNetUnfolder]: For 11149/11266 co-relation queries the response was YES. [2022-11-16 11:06:09,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46484 conditions, 20056 events. 8766/20056 cut-off events. For 11149/11266 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 203712 event pairs, 731 based on Foata normal form. 80/19763 useless extension candidates. Maximal degree in co-relation 46461. Up to 1539 conditions per place. [2022-11-16 11:06:09,659 INFO L137 encePairwiseOnDemand]: 165/184 looper letters, 265 selfloop transitions, 92 changer transitions 0/484 dead transitions. [2022-11-16 11:06:09,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 484 transitions, 2300 flow [2022-11-16 11:06:09,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:06:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-16 11:06:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3847 transitions. [2022-11-16 11:06:09,671 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7743558776167472 [2022-11-16 11:06:09,672 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3847 transitions. [2022-11-16 11:06:09,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3847 transitions. [2022-11-16 11:06:09,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:09,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3847 transitions. [2022-11-16 11:06:09,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 142.4814814814815) internal successors, (3847), 27 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:09,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 184.0) internal successors, (5152), 28 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:09,700 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 184.0) internal successors, (5152), 28 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:09,700 INFO L175 Difference]: Start difference. First operand has 210 places, 189 transitions, 636 flow. Second operand 27 states and 3847 transitions. [2022-11-16 11:06:09,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 484 transitions, 2300 flow [2022-11-16 11:06:09,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 484 transitions, 2287 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-16 11:06:09,962 INFO L231 Difference]: Finished difference. Result has 248 places, 270 transitions, 1403 flow [2022-11-16 11:06:09,963 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1403, PETRI_PLACES=248, PETRI_TRANSITIONS=270} [2022-11-16 11:06:09,964 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 83 predicate places. [2022-11-16 11:06:09,964 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 270 transitions, 1403 flow [2022-11-16 11:06:09,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.77777777777777) internal successors, (2408), 18 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:09,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:09,966 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:09,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:10,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:10,173 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)] === [2022-11-16 11:06:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:10,173 INFO L85 PathProgramCache]: Analyzing trace with hash 444928427, now seen corresponding path program 4 times [2022-11-16 11:06:10,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:10,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309869805] [2022-11-16 11:06:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:10,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:10,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:10,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309869805] [2022-11-16 11:06:10,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309869805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:10,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310306379] [2022-11-16 11:06:10,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:06:10,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:10,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:10,499 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:10,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:06:10,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:06:10,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:10,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:06:10,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:10,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:11,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310306379] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:11,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:06:11,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 23 [2022-11-16 11:06:11,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305095826] [2022-11-16 11:06:11,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:11,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:06:11,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:11,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:06:11,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:06:11,261 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-11-16 11:06:11,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 270 transitions, 1403 flow. Second operand has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:11,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:11,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-11-16 11:06:11,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:14,353 INFO L130 PetriNetUnfolder]: 4783/12514 cut-off events. [2022-11-16 11:06:14,353 INFO L131 PetriNetUnfolder]: For 36741/37742 co-relation queries the response was YES. [2022-11-16 11:06:14,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37645 conditions, 12514 events. 4783/12514 cut-off events. For 36741/37742 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 125771 event pairs, 826 based on Foata normal form. 83/12284 useless extension candidates. Maximal degree in co-relation 37604. Up to 2974 conditions per place. [2022-11-16 11:06:14,579 INFO L137 encePairwiseOnDemand]: 169/184 looper letters, 110 selfloop transitions, 94 changer transitions 0/353 dead transitions. [2022-11-16 11:06:14,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 353 transitions, 2460 flow [2022-11-16 11:06:14,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:06:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 11:06:14,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1982 transitions. [2022-11-16 11:06:14,586 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7694099378881988 [2022-11-16 11:06:14,587 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1982 transitions. [2022-11-16 11:06:14,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1982 transitions. [2022-11-16 11:06:14,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:14,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1982 transitions. [2022-11-16 11:06:14,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 141.57142857142858) internal successors, (1982), 14 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:14,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:14,601 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:14,601 INFO L175 Difference]: Start difference. First operand has 248 places, 270 transitions, 1403 flow. Second operand 14 states and 1982 transitions. [2022-11-16 11:06:14,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 353 transitions, 2460 flow [2022-11-16 11:06:14,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 353 transitions, 2411 flow, removed 16 selfloop flow, removed 9 redundant places. [2022-11-16 11:06:14,857 INFO L231 Difference]: Finished difference. Result has 258 places, 305 transitions, 2045 flow [2022-11-16 11:06:14,857 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2045, PETRI_PLACES=258, PETRI_TRANSITIONS=305} [2022-11-16 11:06:14,858 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 93 predicate places. [2022-11-16 11:06:14,858 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 305 transitions, 2045 flow [2022-11-16 11:06:14,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:14,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:14,859 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:14,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:15,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:15,065 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)] === [2022-11-16 11:06:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:15,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1830030583, now seen corresponding path program 5 times [2022-11-16 11:06:15,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:15,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548731798] [2022-11-16 11:06:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:15,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:15,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:15,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548731798] [2022-11-16 11:06:15,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548731798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:15,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615569959] [2022-11-16 11:06:15,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:06:15,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:15,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:15,391 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:15,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:06:15,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:06:15,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:06:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:06:15,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:06:15,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615569959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:15,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:15,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-16 11:06:15,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542954472] [2022-11-16 11:06:15,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:15,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:06:15,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:15,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:06:15,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:06:15,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 184 [2022-11-16 11:06:15,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 305 transitions, 2045 flow. Second operand has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:15,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:15,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 184 [2022-11-16 11:06:15,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:22,953 INFO L130 PetriNetUnfolder]: 10040/23203 cut-off events. [2022-11-16 11:06:22,954 INFO L131 PetriNetUnfolder]: For 88979/89185 co-relation queries the response was YES. [2022-11-16 11:06:23,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75614 conditions, 23203 events. 10040/23203 cut-off events. For 88979/89185 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 241979 event pairs, 901 based on Foata normal form. 154/22960 useless extension candidates. Maximal degree in co-relation 75569. Up to 2099 conditions per place. [2022-11-16 11:06:23,309 INFO L137 encePairwiseOnDemand]: 164/184 looper letters, 282 selfloop transitions, 185 changer transitions 0/594 dead transitions. [2022-11-16 11:06:23,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 594 transitions, 4695 flow [2022-11-16 11:06:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 11:06:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-16 11:06:23,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4129 transitions. [2022-11-16 11:06:23,320 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7738005997001499 [2022-11-16 11:06:23,321 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4129 transitions. [2022-11-16 11:06:23,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4129 transitions. [2022-11-16 11:06:23,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:23,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4129 transitions. [2022-11-16 11:06:23,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 142.3793103448276) internal successors, (4129), 29 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:23,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 184.0) internal successors, (5520), 30 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:23,345 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 184.0) internal successors, (5520), 30 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:23,345 INFO L175 Difference]: Start difference. First operand has 258 places, 305 transitions, 2045 flow. Second operand 29 states and 4129 transitions. [2022-11-16 11:06:23,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 594 transitions, 4695 flow [2022-11-16 11:06:24,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 594 transitions, 4658 flow, removed 12 selfloop flow, removed 7 redundant places. [2022-11-16 11:06:24,581 INFO L231 Difference]: Finished difference. Result has 291 places, 370 transitions, 3204 flow [2022-11-16 11:06:24,582 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3204, PETRI_PLACES=291, PETRI_TRANSITIONS=370} [2022-11-16 11:06:24,584 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 126 predicate places. [2022-11-16 11:06:24,585 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 370 transitions, 3204 flow [2022-11-16 11:06:24,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:24,586 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:24,586 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:24,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 11:06:24,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:06:24,793 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)] === [2022-11-16 11:06:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:24,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1358269369, now seen corresponding path program 6 times [2022-11-16 11:06:24,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:24,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773911678] [2022-11-16 11:06:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:24,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:25,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:25,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773911678] [2022-11-16 11:06:25,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773911678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:25,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177173192] [2022-11-16 11:06:25,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:06:25,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:25,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:25,193 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:25,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:06:25,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 11:06:25,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:25,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:06:25,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:25,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:26,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177173192] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:26,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:06:26,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 24 [2022-11-16 11:06:26,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452973546] [2022-11-16 11:06:26,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:26,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:06:26,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:06:26,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:06:26,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-11-16 11:06:26,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 370 transitions, 3204 flow. Second operand has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:26,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:26,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-11-16 11:06:26,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:30,296 INFO L130 PetriNetUnfolder]: 5605/14248 cut-off events. [2022-11-16 11:06:30,297 INFO L131 PetriNetUnfolder]: For 75084/76650 co-relation queries the response was YES. [2022-11-16 11:06:30,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51970 conditions, 14248 events. 5605/14248 cut-off events. For 75084/76650 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 145095 event pairs, 909 based on Foata normal form. 185/14021 useless extension candidates. Maximal degree in co-relation 51913. Up to 4853 conditions per place. [2022-11-16 11:06:30,517 INFO L137 encePairwiseOnDemand]: 168/184 looper letters, 145 selfloop transitions, 113 changer transitions 0/425 dead transitions. [2022-11-16 11:06:30,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 425 transitions, 4220 flow [2022-11-16 11:06:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:06:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:06:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1851 transitions. [2022-11-16 11:06:30,522 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7738294314381271 [2022-11-16 11:06:30,522 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1851 transitions. [2022-11-16 11:06:30,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1851 transitions. [2022-11-16 11:06:30,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:30,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1851 transitions. [2022-11-16 11:06:30,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 142.3846153846154) internal successors, (1851), 13 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:30,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:30,533 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:30,533 INFO L175 Difference]: Start difference. First operand has 291 places, 370 transitions, 3204 flow. Second operand 13 states and 1851 transitions. [2022-11-16 11:06:30,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 425 transitions, 4220 flow [2022-11-16 11:06:31,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 425 transitions, 4098 flow, removed 20 selfloop flow, removed 10 redundant places. [2022-11-16 11:06:31,104 INFO L231 Difference]: Finished difference. Result has 296 places, 381 transitions, 3636 flow [2022-11-16 11:06:31,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3098, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3636, PETRI_PLACES=296, PETRI_TRANSITIONS=381} [2022-11-16 11:06:31,105 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 131 predicate places. [2022-11-16 11:06:31,106 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 381 transitions, 3636 flow [2022-11-16 11:06:31,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:31,107 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:31,107 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:31,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:31,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:06:31,319 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)] === [2022-11-16 11:06:31,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:31,319 INFO L85 PathProgramCache]: Analyzing trace with hash 231440623, now seen corresponding path program 7 times [2022-11-16 11:06:31,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:31,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723615927] [2022-11-16 11:06:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:31,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:31,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:31,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723615927] [2022-11-16 11:06:31,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723615927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:31,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042577061] [2022-11-16 11:06:31,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:06:31,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:31,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:31,691 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:31,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:06:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:31,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:06:31,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:32,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:32,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042577061] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:32,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:06:32,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 25 [2022-11-16 11:06:32,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539703814] [2022-11-16 11:06:32,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:32,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:06:32,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:06:32,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:06:32,574 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-11-16 11:06:32,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 381 transitions, 3636 flow. Second operand has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:32,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:32,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-11-16 11:06:32,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:36,489 INFO L130 PetriNetUnfolder]: 5528/14207 cut-off events. [2022-11-16 11:06:36,489 INFO L131 PetriNetUnfolder]: For 82683/84654 co-relation queries the response was YES. [2022-11-16 11:06:36,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52813 conditions, 14207 events. 5528/14207 cut-off events. For 82683/84654 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 144649 event pairs, 631 based on Foata normal form. 165/13982 useless extension candidates. Maximal degree in co-relation 52753. Up to 3822 conditions per place. [2022-11-16 11:06:36,749 INFO L137 encePairwiseOnDemand]: 169/184 looper letters, 122 selfloop transitions, 131 changer transitions 0/420 dead transitions. [2022-11-16 11:06:36,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 420 transitions, 4463 flow [2022-11-16 11:06:36,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:06:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:06:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1846 transitions. [2022-11-16 11:06:36,754 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7717391304347826 [2022-11-16 11:06:36,754 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1846 transitions. [2022-11-16 11:06:36,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1846 transitions. [2022-11-16 11:06:36,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:36,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1846 transitions. [2022-11-16 11:06:36,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:36,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:36,764 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:36,765 INFO L175 Difference]: Start difference. First operand has 296 places, 381 transitions, 3636 flow. Second operand 13 states and 1846 transitions. [2022-11-16 11:06:36,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 420 transitions, 4463 flow [2022-11-16 11:06:37,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 420 transitions, 4333 flow, removed 11 selfloop flow, removed 9 redundant places. [2022-11-16 11:06:37,437 INFO L231 Difference]: Finished difference. Result has 302 places, 384 transitions, 4000 flow [2022-11-16 11:06:37,438 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4000, PETRI_PLACES=302, PETRI_TRANSITIONS=384} [2022-11-16 11:06:37,439 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 137 predicate places. [2022-11-16 11:06:37,439 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 384 transitions, 4000 flow [2022-11-16 11:06:37,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:37,440 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:37,440 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:37,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:37,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 11:06:37,646 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)] === [2022-11-16 11:06:37,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:37,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1713378892, now seen corresponding path program 2 times [2022-11-16 11:06:37,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:37,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095527793] [2022-11-16 11:06:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:37,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:37,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:37,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095527793] [2022-11-16 11:06:37,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095527793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:37,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273850973] [2022-11-16 11:06:37,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:06:37,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:37,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:37,958 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:37,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:06:38,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:06:38,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:38,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:06:38,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:38,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:38,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273850973] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:38,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:06:38,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 19 [2022-11-16 11:06:38,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489036017] [2022-11-16 11:06:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:38,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:06:38,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:06:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:06:38,876 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 184 [2022-11-16 11:06:38,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 384 transitions, 4000 flow. Second operand has 9 states, 9 states have (on average 147.44444444444446) internal successors, (1327), 9 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:38,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:38,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 184 [2022-11-16 11:06:38,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:40,321 INFO L130 PetriNetUnfolder]: 1391/5136 cut-off events. [2022-11-16 11:06:40,321 INFO L131 PetriNetUnfolder]: For 42985/45261 co-relation queries the response was YES. [2022-11-16 11:06:40,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18665 conditions, 5136 events. 1391/5136 cut-off events. For 42985/45261 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 49128 event pairs, 228 based on Foata normal form. 299/5105 useless extension candidates. Maximal degree in co-relation 18603. Up to 841 conditions per place. [2022-11-16 11:06:40,690 INFO L137 encePairwiseOnDemand]: 173/184 looper letters, 136 selfloop transitions, 45 changer transitions 0/432 dead transitions. [2022-11-16 11:06:40,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 432 transitions, 5078 flow [2022-11-16 11:06:40,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:06:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:06:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1483 transitions. [2022-11-16 11:06:40,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8059782608695653 [2022-11-16 11:06:40,694 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1483 transitions. [2022-11-16 11:06:40,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1483 transitions. [2022-11-16 11:06:40,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:40,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1483 transitions. [2022-11-16 11:06:40,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 148.3) internal successors, (1483), 10 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:40,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:40,701 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:40,701 INFO L175 Difference]: Start difference. First operand has 302 places, 384 transitions, 4000 flow. Second operand 10 states and 1483 transitions. [2022-11-16 11:06:40,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 432 transitions, 5078 flow [2022-11-16 11:06:40,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 432 transitions, 4845 flow, removed 37 selfloop flow, removed 13 redundant places. [2022-11-16 11:06:40,889 INFO L231 Difference]: Finished difference. Result has 299 places, 384 transitions, 3926 flow [2022-11-16 11:06:40,889 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3926, PETRI_PLACES=299, PETRI_TRANSITIONS=384} [2022-11-16 11:06:40,890 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 134 predicate places. [2022-11-16 11:06:40,890 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 384 transitions, 3926 flow [2022-11-16 11:06:40,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 147.44444444444446) internal successors, (1327), 9 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:40,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:40,891 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:40,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:41,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:06:41,097 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)] === [2022-11-16 11:06:41,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:41,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2095026434, now seen corresponding path program 1 times [2022-11-16 11:06:41,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:41,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922377977] [2022-11-16 11:06:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:41,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:06:41,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:41,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922377977] [2022-11-16 11:06:41,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922377977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:06:41,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:06:41,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:06:41,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638204635] [2022-11-16 11:06:41,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:41,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:06:41,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:41,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:06:41,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:06:41,244 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 184 [2022-11-16 11:06:41,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 384 transitions, 3926 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:41,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:41,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 184 [2022-11-16 11:06:41,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:42,578 INFO L130 PetriNetUnfolder]: 1033/4612 cut-off events. [2022-11-16 11:06:42,579 INFO L131 PetriNetUnfolder]: For 25449/26173 co-relation queries the response was YES. [2022-11-16 11:06:42,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15557 conditions, 4612 events. 1033/4612 cut-off events. For 25449/26173 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 44298 event pairs, 49 based on Foata normal form. 124/4638 useless extension candidates. Maximal degree in co-relation 15498. Up to 308 conditions per place. [2022-11-16 11:06:42,647 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 31 selfloop transitions, 8 changer transitions 0/401 dead transitions. [2022-11-16 11:06:42,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 401 transitions, 4120 flow [2022-11-16 11:06:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:06:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:06:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 826 transitions. [2022-11-16 11:06:42,649 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8978260869565218 [2022-11-16 11:06:42,650 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 826 transitions. [2022-11-16 11:06:42,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 826 transitions. [2022-11-16 11:06:42,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:42,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 826 transitions. [2022-11-16 11:06:42,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:42,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:42,654 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:42,655 INFO L175 Difference]: Start difference. First operand has 299 places, 384 transitions, 3926 flow. Second operand 5 states and 826 transitions. [2022-11-16 11:06:42,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 401 transitions, 4120 flow [2022-11-16 11:06:42,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 401 transitions, 4067 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-11-16 11:06:42,856 INFO L231 Difference]: Finished difference. Result has 298 places, 387 transitions, 3915 flow [2022-11-16 11:06:42,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3873, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3915, PETRI_PLACES=298, PETRI_TRANSITIONS=387} [2022-11-16 11:06:42,857 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 133 predicate places. [2022-11-16 11:06:42,857 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 387 transitions, 3915 flow [2022-11-16 11:06:42,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:42,858 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:42,859 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:42,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:06:42,859 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)] === [2022-11-16 11:06:42,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:42,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1171554897, now seen corresponding path program 1 times [2022-11-16 11:06:42,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:42,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702212344] [2022-11-16 11:06:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:42,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:06:48,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:48,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702212344] [2022-11-16 11:06:48,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702212344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:48,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456083444] [2022-11-16 11:06:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:48,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:48,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:48,273 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:48,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1e2185c-5e22-47d1-bf95-f2a4c91d38eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:06:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:48,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-16 11:06:48,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:51,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:51,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:06:51,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 55 [2022-11-16 11:06:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:52,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:56,522 INFO L321 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2022-11-16 11:06:56,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 43 [2022-11-16 11:06:56,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:06:56,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 81 [2022-11-16 11:06:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:58,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456083444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:58,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:58,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 35, 31] total 84 [2022-11-16 11:06:58,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933209197] [2022-11-16 11:06:58,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:58,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-16 11:06:58,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:58,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-16 11:06:58,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=6374, Unknown=0, NotChecked=0, Total=6972 [2022-11-16 11:06:58,691 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 184 [2022-11-16 11:06:58,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 387 transitions, 3915 flow. Second operand has 84 states, 84 states have (on average 73.98809523809524) internal successors, (6215), 84 states have internal predecessors, (6215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:58,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:58,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 184 [2022-11-16 11:06:58,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand