./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 dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ --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-dbf71c6-m [2022-10-17 10:18:07,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:18:07,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:18:07,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:18:07,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:18:07,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:18:07,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:18:07,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:18:07,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:18:07,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:18:07,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:18:07,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:18:07,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:18:07,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:18:07,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:18:07,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:18:07,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:18:07,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:18:07,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:18:07,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:18:07,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:18:07,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:18:07,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:18:07,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:18:07,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:18:07,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:18:07,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:18:07,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:18:07,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:18:07,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:18:07,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:18:07,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:18:07,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:18:07,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:18:07,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:18:07,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:18:07,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:18:07,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:18:07,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:18:07,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:18:07,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:18:07,289 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:18:07,336 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:18:07,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:18:07,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:18:07,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:18:07,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:18:07,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:18:07,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:18:07,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:18:07,340 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:18:07,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:18:07,341 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:18:07,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:18:07,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:18:07,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:18:07,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:18:07,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:18:07,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:18:07,343 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:18:07,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:18:07,343 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:18:07,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:18:07,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:18:07,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:18:07,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:18:07,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:18:07,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:18:07,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:18:07,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:18:07,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:18:07,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:18:07,347 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:18:07,348 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:18:07,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:18:07,348 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_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 [2022-10-17 10:18:07,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:18:07,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:18:07,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:18:07,634 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:18:07,635 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:18:07,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-10-17 10:18:07,712 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/data/067566b8d/b2a8324fa9b3441d85dc2d06b609658a/FLAG16962a90d [2022-10-17 10:18:08,177 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:18:08,178 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-10-17 10:18:08,187 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/data/067566b8d/b2a8324fa9b3441d85dc2d06b609658a/FLAG16962a90d [2022-10-17 10:18:08,540 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/data/067566b8d/b2a8324fa9b3441d85dc2d06b609658a [2022-10-17 10:18:08,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:18:08,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:18:08,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:18:08,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:18:08,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:18:08,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:18:08" (1/1) ... [2022-10-17 10:18:08,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69198b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08, skipping insertion in model container [2022-10-17 10:18:08,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:18:08" (1/1) ... [2022-10-17 10:18:08,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:18:08,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:18:08,806 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-10-17 10:18:08,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:18:08,821 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:18:08,845 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-10-17 10:18:08,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:18:08,863 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:18:08,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08 WrapperNode [2022-10-17 10:18:08,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:18:08,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:18:08,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:18:08,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:18:08,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08" (1/1) ... [2022-10-17 10:18:08,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08" (1/1) ... [2022-10-17 10:18:08,903 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2022-10-17 10:18:08,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:18:08,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:18:08,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:18:08,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:18:08,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08" (1/1) ... [2022-10-17 10:18:08,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08" (1/1) ... [2022-10-17 10:18:08,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08" (1/1) ... [2022-10-17 10:18:08,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08" (1/1) ... [2022-10-17 10:18:08,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08" (1/1) ... [2022-10-17 10:18:08,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08" (1/1) ... [2022-10-17 10:18:08,931 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08" (1/1) ... [2022-10-17 10:18:08,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08" (1/1) ... [2022-10-17 10:18:08,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:18:08,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:18:08,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:18:08,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:18:08,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08" (1/1) ... [2022-10-17 10:18:08,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:18:08,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:08,970 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:18:08,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:18:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:18:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-10-17 10:18:09,024 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-10-17 10:18:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-10-17 10:18:09,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-10-17 10:18:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-10-17 10:18:09,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-10-17 10:18:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:18:09,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:18:09,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:18:09,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:18:09,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:18:09,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:18:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:18:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:18:09,030 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:18:09,124 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:18:09,127 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:18:09,561 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:18:09,572 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:18:09,573 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-17 10:18:09,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:18:09 BoogieIcfgContainer [2022-10-17 10:18:09,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:18:09,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:18:09,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:18:09,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:18:09,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:18:08" (1/3) ... [2022-10-17 10:18:09,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b28b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:18:09, skipping insertion in model container [2022-10-17 10:18:09,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:08" (2/3) ... [2022-10-17 10:18:09,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b28b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:18:09, skipping insertion in model container [2022-10-17 10:18:09,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:18:09" (3/3) ... [2022-10-17 10:18:09,600 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2022-10-17 10:18:09,608 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:18:09,634 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:18:09,634 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:18:09,634 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:18:09,764 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-10-17 10:18:09,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 184 transitions, 392 flow [2022-10-17 10:18:09,964 INFO L130 PetriNetUnfolder]: 15/181 cut-off events. [2022-10-17 10:18:09,965 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-10-17 10:18:09,972 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 196 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. [2022-10-17 10:18:09,972 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 184 transitions, 392 flow [2022-10-17 10:18:09,984 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 170 transitions, 358 flow [2022-10-17 10:18:10,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:18:10,015 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;@6681ecfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:18:10,016 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-17 10:18:10,119 INFO L130 PetriNetUnfolder]: 15/169 cut-off events. [2022-10-17 10:18:10,119 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-10-17 10:18:10,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:10,121 INFO L208 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] [2022-10-17 10:18:10,122 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)] === [2022-10-17 10:18:10,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash 842563710, now seen corresponding path program 1 times [2022-10-17 10:18:10,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:10,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863139607] [2022-10-17 10:18:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:10,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:10,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:10,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863139607] [2022-10-17 10:18:10,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863139607] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:10,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:10,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:18:10,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218393356] [2022-10-17 10:18:10,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:10,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:18:10,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:10,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:18:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:18:10,673 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 184 [2022-10-17 10:18:10,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 170 transitions, 358 flow. Second operand has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:10,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:10,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 184 [2022-10-17 10:18:10,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:10,790 INFO L130 PetriNetUnfolder]: 7/162 cut-off events. [2022-10-17 10:18:10,790 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-10-17 10:18:10,793 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 190 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. [2022-10-17 10:18:10,796 INFO L137 encePairwiseOnDemand]: 176/184 looper letters, 6 selfloop transitions, 0 changer transitions 4/162 dead transitions. [2022-10-17 10:18:10,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 162 transitions, 354 flow [2022-10-17 10:18:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:18:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:18:10,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 352 transitions. [2022-10-17 10:18:10,822 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9565217391304348 [2022-10-17 10:18:10,823 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 352 transitions. [2022-10-17 10:18:10,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 352 transitions. [2022-10-17 10:18:10,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:10,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 352 transitions. [2022-10-17 10:18:10,838 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) [2022-10-17 10:18:10,848 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) [2022-10-17 10:18:10,850 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) [2022-10-17 10:18:10,852 INFO L175 Difference]: Start difference. First operand has 165 places, 170 transitions, 358 flow. Second operand 2 states and 352 transitions. [2022-10-17 10:18:10,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 162 transitions, 354 flow [2022-10-17 10:18:10,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 162 transitions, 342 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-10-17 10:18:10,865 INFO L231 Difference]: Finished difference. Result has 160 places, 158 transitions, 322 flow [2022-10-17 10:18:10,868 INFO L270 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} [2022-10-17 10:18:10,874 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, -5 predicate places. [2022-10-17 10:18:10,874 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 158 transitions, 322 flow [2022-10-17 10:18:10,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:10,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:10,876 INFO L208 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] [2022-10-17 10:18:10,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:18:10,877 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)] === [2022-10-17 10:18:10,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:10,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1535665407, now seen corresponding path program 1 times [2022-10-17 10:18:10,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:10,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746408397] [2022-10-17 10:18:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:10,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:11,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:11,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746408397] [2022-10-17 10:18:11,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746408397] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:11,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:11,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:18:11,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974739430] [2022-10-17 10:18:11,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:11,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:18:11,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:11,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:18:11,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:18:11,846 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 184 [2022-10-17 10:18:11,849 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) [2022-10-17 10:18:11,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:11,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 184 [2022-10-17 10:18:11,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:12,213 INFO L130 PetriNetUnfolder]: 175/665 cut-off events. [2022-10-17 10:18:12,214 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-10-17 10:18:12,219 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 3342 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. [2022-10-17 10:18:12,224 INFO L137 encePairwiseOnDemand]: 174/184 looper letters, 41 selfloop transitions, 6 changer transitions 4/166 dead transitions. [2022-10-17 10:18:12,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 166 transitions, 440 flow [2022-10-17 10:18:12,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:18:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 10:18:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1076 transitions. [2022-10-17 10:18:12,231 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7309782608695652 [2022-10-17 10:18:12,232 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1076 transitions. [2022-10-17 10:18:12,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1076 transitions. [2022-10-17 10:18:12,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:12,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1076 transitions. [2022-10-17 10:18:12,250 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) [2022-10-17 10:18:12,257 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) [2022-10-17 10:18:12,259 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) [2022-10-17 10:18:12,259 INFO L175 Difference]: Start difference. First operand has 160 places, 158 transitions, 322 flow. Second operand 8 states and 1076 transitions. [2022-10-17 10:18:12,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 166 transitions, 440 flow [2022-10-17 10:18:12,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 440 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:18:12,268 INFO L231 Difference]: Finished difference. Result has 167 places, 159 transitions, 350 flow [2022-10-17 10:18:12,269 INFO L270 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} [2022-10-17 10:18:12,270 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 2 predicate places. [2022-10-17 10:18:12,270 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 159 transitions, 350 flow [2022-10-17 10:18:12,271 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) [2022-10-17 10:18:12,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:12,272 INFO L208 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] [2022-10-17 10:18:12,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:18:12,272 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)] === [2022-10-17 10:18:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1889566339, now seen corresponding path program 1 times [2022-10-17 10:18:12,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:12,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273388515] [2022-10-17 10:18:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:12,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:18:13,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:13,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273388515] [2022-10-17 10:18:13,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273388515] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:13,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:13,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:18:13,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348691995] [2022-10-17 10:18:13,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:13,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:18:13,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:13,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:18:13,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:18:13,039 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 184 [2022-10-17 10:18:13,041 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) [2022-10-17 10:18:13,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:13,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 184 [2022-10-17 10:18:13,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:13,462 INFO L130 PetriNetUnfolder]: 224/1098 cut-off events. [2022-10-17 10:18:13,463 INFO L131 PetriNetUnfolder]: For 45/46 co-relation queries the response was YES. [2022-10-17 10:18:13,470 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 53. 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. [2022-10-17 10:18:13,480 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 62 selfloop transitions, 9 changer transitions 4/200 dead transitions. [2022-10-17 10:18:13,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 200 transitions, 594 flow [2022-10-17 10:18:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:18:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 10:18:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1035 transitions. [2022-10-17 10:18:13,487 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8035714285714286 [2022-10-17 10:18:13,487 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1035 transitions. [2022-10-17 10:18:13,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1035 transitions. [2022-10-17 10:18:13,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:13,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1035 transitions. [2022-10-17 10:18:13,495 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) [2022-10-17 10:18:13,500 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) [2022-10-17 10:18:13,502 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) [2022-10-17 10:18:13,502 INFO L175 Difference]: Start difference. First operand has 167 places, 159 transitions, 350 flow. Second operand 7 states and 1035 transitions. [2022-10-17 10:18:13,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 200 transitions, 594 flow [2022-10-17 10:18:13,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 200 transitions, 576 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-10-17 10:18:13,513 INFO L231 Difference]: Finished difference. Result has 168 places, 165 transitions, 385 flow [2022-10-17 10:18:13,513 INFO L270 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} [2022-10-17 10:18:13,516 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 3 predicate places. [2022-10-17 10:18:13,517 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 165 transitions, 385 flow [2022-10-17 10:18:13,518 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) [2022-10-17 10:18:13,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:13,518 INFO L208 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] [2022-10-17 10:18:13,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:18:13,519 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)] === [2022-10-17 10:18:13,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:13,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1003792165, now seen corresponding path program 1 times [2022-10-17 10:18:13,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:13,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160396083] [2022-10-17 10:18:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:13,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:13,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:13,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160396083] [2022-10-17 10:18:13,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160396083] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:13,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652832829] [2022-10-17 10:18:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:13,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:13,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:13,927 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:13,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:18:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:14,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:18:14,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:14,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:18:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:14,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652832829] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:18:14,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:18:14,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-10-17 10:18:14,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719705762] [2022-10-17 10:18:14,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:18:14,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-17 10:18:14,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:14,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-17 10:18:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:18:14,736 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 184 [2022-10-17 10:18:14,742 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) [2022-10-17 10:18:14,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:14,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 184 [2022-10-17 10:18:14,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:15,374 INFO L130 PetriNetUnfolder]: 270/1248 cut-off events. [2022-10-17 10:18:15,374 INFO L131 PetriNetUnfolder]: For 81/90 co-relation queries the response was YES. [2022-10-17 10:18:15,384 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 8212 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. [2022-10-17 10:18:15,393 INFO L137 encePairwiseOnDemand]: 171/184 looper letters, 46 selfloop transitions, 14 changer transitions 0/193 dead transitions. [2022-10-17 10:18:15,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 193 transitions, 575 flow [2022-10-17 10:18:15,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:18:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-10-17 10:18:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1933 transitions. [2022-10-17 10:18:15,402 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8081103678929766 [2022-10-17 10:18:15,402 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1933 transitions. [2022-10-17 10:18:15,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1933 transitions. [2022-10-17 10:18:15,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:15,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1933 transitions. [2022-10-17 10:18:15,410 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) [2022-10-17 10:18:15,417 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) [2022-10-17 10:18:15,418 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) [2022-10-17 10:18:15,418 INFO L175 Difference]: Start difference. First operand has 168 places, 165 transitions, 385 flow. Second operand 13 states and 1933 transitions. [2022-10-17 10:18:15,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 193 transitions, 575 flow [2022-10-17 10:18:15,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 193 transitions, 571 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-10-17 10:18:15,427 INFO L231 Difference]: Finished difference. Result has 182 places, 172 transitions, 457 flow [2022-10-17 10:18:15,428 INFO L270 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} [2022-10-17 10:18:15,429 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 17 predicate places. [2022-10-17 10:18:15,429 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 172 transitions, 457 flow [2022-10-17 10:18:15,431 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) [2022-10-17 10:18:15,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:15,431 INFO L208 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] [2022-10-17 10:18:15,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:18:15,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:15,646 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)] === [2022-10-17 10:18:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2061525029, now seen corresponding path program 1 times [2022-10-17 10:18:15,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:15,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231113876] [2022-10-17 10:18:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:15,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:18:15,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:15,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231113876] [2022-10-17 10:18:15,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231113876] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:15,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:15,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:18:15,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076491940] [2022-10-17 10:18:15,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:15,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:18:15,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:15,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:18:15,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:18:15,841 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 184 [2022-10-17 10:18:15,842 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) [2022-10-17 10:18:15,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:15,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 184 [2022-10-17 10:18:15,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:16,018 INFO L130 PetriNetUnfolder]: 106/711 cut-off events. [2022-10-17 10:18:16,018 INFO L131 PetriNetUnfolder]: For 94/116 co-relation queries the response was YES. [2022-10-17 10:18:16,025 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 3851 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. [2022-10-17 10:18:16,030 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 22 selfloop transitions, 8 changer transitions 0/185 dead transitions. [2022-10-17 10:18:16,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 185 transitions, 557 flow [2022-10-17 10:18:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:18:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:18:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 829 transitions. [2022-10-17 10:18:16,034 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9010869565217391 [2022-10-17 10:18:16,035 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 829 transitions. [2022-10-17 10:18:16,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 829 transitions. [2022-10-17 10:18:16,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:16,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 829 transitions. [2022-10-17 10:18:16,039 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) [2022-10-17 10:18:16,041 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) [2022-10-17 10:18:16,042 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) [2022-10-17 10:18:16,042 INFO L175 Difference]: Start difference. First operand has 182 places, 172 transitions, 457 flow. Second operand 5 states and 829 transitions. [2022-10-17 10:18:16,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 185 transitions, 557 flow [2022-10-17 10:18:16,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 185 transitions, 542 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-10-17 10:18:16,050 INFO L231 Difference]: Finished difference. Result has 185 places, 176 transitions, 492 flow [2022-10-17 10:18:16,051 INFO L270 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} [2022-10-17 10:18:16,052 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 20 predicate places. [2022-10-17 10:18:16,052 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 176 transitions, 492 flow [2022-10-17 10:18:16,053 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) [2022-10-17 10:18:16,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:16,053 INFO L208 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] [2022-10-17 10:18:16,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:18:16,054 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)] === [2022-10-17 10:18:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:16,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1140785363, now seen corresponding path program 1 times [2022-10-17 10:18:16,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:16,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615652539] [2022-10-17 10:18:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:16,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:18:16,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:16,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615652539] [2022-10-17 10:18:16,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615652539] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:16,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:16,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:18:16,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46587342] [2022-10-17 10:18:16,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:16,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:18:16,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:16,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:18:16,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:18:16,240 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 184 [2022-10-17 10:18:16,241 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) [2022-10-17 10:18:16,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:16,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 184 [2022-10-17 10:18:16,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:16,495 INFO L130 PetriNetUnfolder]: 142/851 cut-off events. [2022-10-17 10:18:16,495 INFO L131 PetriNetUnfolder]: For 216/254 co-relation queries the response was YES. [2022-10-17 10:18:16,502 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 5128 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. [2022-10-17 10:18:16,509 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 21 selfloop transitions, 7 changer transitions 0/188 dead transitions. [2022-10-17 10:18:16,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 188 transitions, 583 flow [2022-10-17 10:18:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:18:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:18:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 828 transitions. [2022-10-17 10:18:16,513 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-10-17 10:18:16,514 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 828 transitions. [2022-10-17 10:18:16,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 828 transitions. [2022-10-17 10:18:16,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:16,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 828 transitions. [2022-10-17 10:18:16,520 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) [2022-10-17 10:18:16,523 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) [2022-10-17 10:18:16,524 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) [2022-10-17 10:18:16,525 INFO L175 Difference]: Start difference. First operand has 185 places, 176 transitions, 492 flow. Second operand 5 states and 828 transitions. [2022-10-17 10:18:16,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 188 transitions, 583 flow [2022-10-17 10:18:16,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 188 transitions, 583 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:18:16,535 INFO L231 Difference]: Finished difference. Result has 192 places, 180 transitions, 536 flow [2022-10-17 10:18:16,536 INFO L270 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} [2022-10-17 10:18:16,539 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 27 predicate places. [2022-10-17 10:18:16,539 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 180 transitions, 536 flow [2022-10-17 10:18:16,540 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) [2022-10-17 10:18:16,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:16,541 INFO L208 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] [2022-10-17 10:18:16,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:18:16,541 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)] === [2022-10-17 10:18:16,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:16,542 INFO L85 PathProgramCache]: Analyzing trace with hash -477124963, now seen corresponding path program 1 times [2022-10-17 10:18:16,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:16,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152350512] [2022-10-17 10:18:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:16,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:17,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:17,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152350512] [2022-10-17 10:18:17,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152350512] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:17,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940102745] [2022-10-17 10:18:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:17,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:17,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:17,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:17,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:18:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:17,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:18:17,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:17,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:18:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:18,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940102745] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:18:18,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:18:18,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-10-17 10:18:18,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595610062] [2022-10-17 10:18:18,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:18:18,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-10-17 10:18:18,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:18,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-10-17 10:18:18,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-10-17 10:18:18,176 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 184 [2022-10-17 10:18:18,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 180 transitions, 536 flow. Second operand has 31 states, 31 states have (on average 125.25806451612904) internal successors, (3883), 31 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:18,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:18,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 184 [2022-10-17 10:18:18,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:20,320 INFO L130 PetriNetUnfolder]: 1389/4440 cut-off events. [2022-10-17 10:18:20,320 INFO L131 PetriNetUnfolder]: For 1388/1450 co-relation queries the response was YES. [2022-10-17 10:18:20,383 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 202. Compared 40331 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. [2022-10-17 10:18:20,414 INFO L137 encePairwiseOnDemand]: 164/184 looper letters, 71 selfloop transitions, 21 changer transitions 0/216 dead transitions. [2022-10-17 10:18:20,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 216 transitions, 815 flow [2022-10-17 10:18:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-17 10:18:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-10-17 10:18:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2411 transitions. [2022-10-17 10:18:20,424 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6896453089244852 [2022-10-17 10:18:20,425 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2411 transitions. [2022-10-17 10:18:20,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2411 transitions. [2022-10-17 10:18:20,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:20,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2411 transitions. [2022-10-17 10:18:20,436 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) [2022-10-17 10:18:20,444 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) [2022-10-17 10:18:20,446 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) [2022-10-17 10:18:20,446 INFO L175 Difference]: Start difference. First operand has 192 places, 180 transitions, 536 flow. Second operand 19 states and 2411 transitions. [2022-10-17 10:18:20,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 216 transitions, 815 flow [2022-10-17 10:18:20,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 216 transitions, 815 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:18:20,461 INFO L231 Difference]: Finished difference. Result has 217 places, 187 transitions, 627 flow [2022-10-17 10:18:20,462 INFO L270 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} [2022-10-17 10:18:20,463 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 52 predicate places. [2022-10-17 10:18:20,463 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 187 transitions, 627 flow [2022-10-17 10:18:20,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 125.25806451612904) internal successors, (3883), 31 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:20,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:20,466 INFO L208 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] [2022-10-17 10:18:20,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:18:20,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:20,683 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)] === [2022-10-17 10:18:20,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash -942074776, now seen corresponding path program 1 times [2022-10-17 10:18:20,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:20,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709344335] [2022-10-17 10:18:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:20,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:21,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:21,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709344335] [2022-10-17 10:18:21,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709344335] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:21,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385261818] [2022-10-17 10:18:21,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:21,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:21,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:21,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:18:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:21,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:18:21,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:21,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:18:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:22,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385261818] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:18:22,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:18:22,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-10-17 10:18:22,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781763377] [2022-10-17 10:18:22,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:18:22,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-10-17 10:18:22,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:22,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-10-17 10:18:22,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-10-17 10:18:22,348 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 184 [2022-10-17 10:18:22,361 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) [2022-10-17 10:18:22,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:22,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 184 [2022-10-17 10:18:22,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:23,900 INFO L130 PetriNetUnfolder]: 1000/2883 cut-off events. [2022-10-17 10:18:23,901 INFO L131 PetriNetUnfolder]: For 1379/1436 co-relation queries the response was YES. [2022-10-17 10:18:23,929 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 23447 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. [2022-10-17 10:18:23,954 INFO L137 encePairwiseOnDemand]: 167/184 looper letters, 50 selfloop transitions, 13 changer transitions 21/208 dead transitions. [2022-10-17 10:18:23,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 208 transitions, 853 flow [2022-10-17 10:18:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 10:18:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-10-17 10:18:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2174 transitions. [2022-10-17 10:18:24,039 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6950127877237852 [2022-10-17 10:18:24,039 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2174 transitions. [2022-10-17 10:18:24,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2174 transitions. [2022-10-17 10:18:24,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:24,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2174 transitions. [2022-10-17 10:18:24,050 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) [2022-10-17 10:18:24,059 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) [2022-10-17 10:18:24,062 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) [2022-10-17 10:18:24,063 INFO L175 Difference]: Start difference. First operand has 217 places, 187 transitions, 627 flow. Second operand 17 states and 2174 transitions. [2022-10-17 10:18:24,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 208 transitions, 853 flow [2022-10-17 10:18:24,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 208 transitions, 827 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-10-17 10:18:24,086 INFO L231 Difference]: Finished difference. Result has 223 places, 177 transitions, 573 flow [2022-10-17 10:18:24,086 INFO L270 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} [2022-10-17 10:18:24,091 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 58 predicate places. [2022-10-17 10:18:24,091 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 177 transitions, 573 flow [2022-10-17 10:18:24,104 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) [2022-10-17 10:18:24,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:24,105 INFO L208 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] [2022-10-17 10:18:24,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:18:24,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:24,314 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)] === [2022-10-17 10:18:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:24,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1864471057, now seen corresponding path program 2 times [2022-10-17 10:18:24,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:24,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692736944] [2022-10-17 10:18:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:24,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:18:24,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:24,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692736944] [2022-10-17 10:18:24,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692736944] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:24,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55019802] [2022-10-17 10:18:24,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:18:24,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:24,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:24,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:24,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:18:24,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:18:24,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:18:24,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:18:24,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:18:25,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:18:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:18:25,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55019802] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:25,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:18:25,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 23 [2022-10-17 10:18:25,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517835718] [2022-10-17 10:18:25,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:25,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:18:25,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:18:25,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-10-17 10:18:25,565 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-10-17 10:18:25,568 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) [2022-10-17 10:18:25,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:25,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-10-17 10:18:25,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:27,351 INFO L130 PetriNetUnfolder]: 2652/6431 cut-off events. [2022-10-17 10:18:27,351 INFO L131 PetriNetUnfolder]: For 2927/2940 co-relation queries the response was YES. [2022-10-17 10:18:27,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14784 conditions, 6431 events. 2652/6431 cut-off events. For 2927/2940 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 57966 event pairs, 617 based on Foata normal form. 13/6218 useless extension candidates. Maximal degree in co-relation 14756. Up to 1159 conditions per place. [2022-10-17 10:18:27,447 INFO L137 encePairwiseOnDemand]: 170/184 looper letters, 82 selfloop transitions, 20 changer transitions 0/234 dead transitions. [2022-10-17 10:18:27,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 234 transitions, 960 flow [2022-10-17 10:18:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:18:27,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:18:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1992 transitions. [2022-10-17 10:18:27,456 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7732919254658385 [2022-10-17 10:18:27,456 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1992 transitions. [2022-10-17 10:18:27,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1992 transitions. [2022-10-17 10:18:27,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:27,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1992 transitions. [2022-10-17 10:18:27,464 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) [2022-10-17 10:18:27,470 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) [2022-10-17 10:18:27,471 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) [2022-10-17 10:18:27,472 INFO L175 Difference]: Start difference. First operand has 223 places, 177 transitions, 573 flow. Second operand 14 states and 1992 transitions. [2022-10-17 10:18:27,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 234 transitions, 960 flow [2022-10-17 10:18:27,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 234 transitions, 886 flow, removed 23 selfloop flow, removed 19 redundant places. [2022-10-17 10:18:27,525 INFO L231 Difference]: Finished difference. Result has 210 places, 189 transitions, 636 flow [2022-10-17 10:18:27,526 INFO L270 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} [2022-10-17 10:18:27,527 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 45 predicate places. [2022-10-17 10:18:27,527 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 189 transitions, 636 flow [2022-10-17 10:18:27,528 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) [2022-10-17 10:18:27,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:27,528 INFO L208 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] [2022-10-17 10:18:27,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:18:27,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-10-17 10:18:27,751 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)] === [2022-10-17 10:18:27,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:27,751 INFO L85 PathProgramCache]: Analyzing trace with hash -836640587, now seen corresponding path program 3 times [2022-10-17 10:18:27,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:27,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835338167] [2022-10-17 10:18:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:27,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:18:28,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:28,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835338167] [2022-10-17 10:18:28,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835338167] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:28,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739530097] [2022-10-17 10:18:28,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:18:28,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:28,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:28,054 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:28,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:18:28,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 10:18:28,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:18:28,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:18:28,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:18:28,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:18:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:18:28,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739530097] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:18:28,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:18:28,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 18 [2022-10-17 10:18:28,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598977166] [2022-10-17 10:18:28,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:18:28,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:18:28,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:28,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:18:28,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:18:28,565 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 184 [2022-10-17 10:18:28,568 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) [2022-10-17 10:18:28,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:28,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 184 [2022-10-17 10:18:28,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:33,246 INFO L130 PetriNetUnfolder]: 8766/20056 cut-off events. [2022-10-17 10:18:33,247 INFO L131 PetriNetUnfolder]: For 11149/11266 co-relation queries the response was YES. [2022-10-17 10:18:33,404 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 203475 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. [2022-10-17 10:18:33,621 INFO L137 encePairwiseOnDemand]: 165/184 looper letters, 265 selfloop transitions, 92 changer transitions 0/484 dead transitions. [2022-10-17 10:18:33,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 484 transitions, 2300 flow [2022-10-17 10:18:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-10-17 10:18:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-10-17 10:18:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3847 transitions. [2022-10-17 10:18:33,632 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7743558776167472 [2022-10-17 10:18:33,632 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3847 transitions. [2022-10-17 10:18:33,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3847 transitions. [2022-10-17 10:18:33,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:33,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3847 transitions. [2022-10-17 10:18:33,644 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) [2022-10-17 10:18:33,655 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) [2022-10-17 10:18:33,656 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) [2022-10-17 10:18:33,657 INFO L175 Difference]: Start difference. First operand has 210 places, 189 transitions, 636 flow. Second operand 27 states and 3847 transitions. [2022-10-17 10:18:33,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 484 transitions, 2300 flow [2022-10-17 10:18:33,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 484 transitions, 2287 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-10-17 10:18:33,890 INFO L231 Difference]: Finished difference. Result has 248 places, 270 transitions, 1403 flow [2022-10-17 10:18:33,891 INFO L270 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} [2022-10-17 10:18:33,892 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 83 predicate places. [2022-10-17 10:18:33,892 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 270 transitions, 1403 flow [2022-10-17 10:18:33,893 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) [2022-10-17 10:18:33,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:33,893 INFO L208 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] [2022-10-17 10:18:33,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:18:34,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:34,122 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)] === [2022-10-17 10:18:34,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:34,123 INFO L85 PathProgramCache]: Analyzing trace with hash 504300449, now seen corresponding path program 4 times [2022-10-17 10:18:34,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:34,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372696279] [2022-10-17 10:18:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:34,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:34,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:34,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372696279] [2022-10-17 10:18:34,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372696279] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:34,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617030010] [2022-10-17 10:18:34,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:18:34,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:34,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:34,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:34,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:18:34,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:18:34,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:18:34,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:18:34,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:34,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:18:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:35,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617030010] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:35,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:18:35,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 23 [2022-10-17 10:18:35,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391516144] [2022-10-17 10:18:35,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:35,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:18:35,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:35,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:18:35,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-10-17 10:18:35,095 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-10-17 10:18:35,100 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) [2022-10-17 10:18:35,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:35,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-10-17 10:18:35,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:37,570 INFO L130 PetriNetUnfolder]: 4783/12514 cut-off events. [2022-10-17 10:18:37,570 INFO L131 PetriNetUnfolder]: For 36740/37747 co-relation queries the response was YES. [2022-10-17 10:18:37,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37645 conditions, 12514 events. 4783/12514 cut-off events. For 36740/37747 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 125657 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. [2022-10-17 10:18:37,805 INFO L137 encePairwiseOnDemand]: 169/184 looper letters, 110 selfloop transitions, 94 changer transitions 0/353 dead transitions. [2022-10-17 10:18:37,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 353 transitions, 2460 flow [2022-10-17 10:18:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:18:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:18:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1982 transitions. [2022-10-17 10:18:37,809 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7694099378881988 [2022-10-17 10:18:37,810 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1982 transitions. [2022-10-17 10:18:37,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1982 transitions. [2022-10-17 10:18:37,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:37,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1982 transitions. [2022-10-17 10:18:37,815 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) [2022-10-17 10:18:37,819 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) [2022-10-17 10:18:37,820 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) [2022-10-17 10:18:37,820 INFO L175 Difference]: Start difference. First operand has 248 places, 270 transitions, 1403 flow. Second operand 14 states and 1982 transitions. [2022-10-17 10:18:37,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 353 transitions, 2460 flow [2022-10-17 10:18:38,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 353 transitions, 2411 flow, removed 16 selfloop flow, removed 9 redundant places. [2022-10-17 10:18:38,111 INFO L231 Difference]: Finished difference. Result has 258 places, 305 transitions, 2045 flow [2022-10-17 10:18:38,112 INFO L270 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} [2022-10-17 10:18:38,112 INFO L287 CegarLoopForPetriNet]: 165 programPoint places, 93 predicate places. [2022-10-17 10:18:38,113 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 305 transitions, 2045 flow [2022-10-17 10:18:38,113 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) [2022-10-17 10:18:38,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:38,114 INFO L208 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] [2022-10-17 10:18:38,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:18:38,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:38,330 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)] === [2022-10-17 10:18:38,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:38,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1770658561, now seen corresponding path program 5 times [2022-10-17 10:18:38,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:38,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131217687] [2022-10-17 10:18:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:38,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:18:38,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:38,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131217687] [2022-10-17 10:18:38,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131217687] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:38,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349131013] [2022-10-17 10:18:38,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:18:38,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:38,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:38,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:38,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4bd74c5-f70c-492e-a395-92b96e06551c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:18:38,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-10-17 10:18:38,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:18:38,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:18:38,717 INFO L286 TraceCheckSpWp]: Computing forward predicates...